Built 2026-10-19 (19 October 2026)

Chambersburg 1 ESE Weather Records (USC00361354)

Record envelope, standing records and threshold days for Chambersburg 1 ESE (USC00361354), Pennsylvania, United States, with 132 years of record.

Key Facts for Chambersburg 1 ESE

  • Chambersburg 1 ESE (USC00361354) is a weather station in Pennsylvania, United States at 39.93 latitude and -77.64 longitude, 195 m (640 ft) above sea level.
  • The station reports from 1894 to 2025, 132 years of record.
  • 1,464 records set at Chambersburg 1 ESE still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Chambersburg 1 ESE set a daily record precipitation of 67.8 mm (2.7 in) on 14 July 2025.

About the Station

  • Location: Pennsylvania, United States, 39.93 latitude, -77.64 longitude.
  • Elevation: 195 m (640 ft).
  • Period of record: 1894 to 2025, 132 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

2 days at or beyond a record
Daily record high and record low at Chambersburg 1 ESE, with 2026 drawn through them The band shows the record high and record low for each calendar day at Chambersburg 1 ESE. The lines show the 2026 daily maximum and minimum. 2 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Chambersburg 1 ESE. The lines show the 2026 daily maximum and minimum. 2 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Chambersburg 1 ESE, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan25.0 C (77.0 F)-29.4 C (-20.9 F)10.0 C (50.0 F)-20.0 C (-4.0 F)
Feb26.1 C (79.0 F)-26.7 C (-16.1 F)17.8 C (64.0 F)-11.7 C (10.9 F)
Mar31.1 C (88.0 F)-22.2 C (-8.0 F)27.2 C (81.0 F)-6.7 C (19.9 F)
Apr34.4 C (93.9 F)-13.3 C (8.1 F)29.4 C (84.9 F)-4.4 C (24.1 F)
May36.7 C (98.1 F)-3.9 C (25.0 F)30.0 C (86.0 F)5.0 C (41.0 F)
Jun38.9 C (102.0 F)0.0 C (32.0 F)36.1 C (97.0 F)5.6 C (42.1 F)
Jul41.7 C (107.1 F)5.0 C (41.0 F)35.6 C (96.1 F)14.4 C (57.9 F)
Aug40.6 C (105.1 F)2.8 C (37.0 F)n/an/a
Sep38.3 C (100.9 F)-2.2 C (28.0 F)n/an/a
Oct35.0 C (95.0 F)-7.8 C (18.0 F)n/an/a
Nov27.8 C (82.0 F)-15.6 C (3.9 F)n/an/a
Dec23.9 C (75.0 F)-25.0 C (-13.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Chambersburg 1 ESE by the year they were set 1,464 records at Chambersburg 1 ESE still stand. 1930 holds the most, with 32. 0102030401894: 161895: 251896: 301897: 101898: 101899: 111900: 181901: 31917: 221918: 171921: 71922: 81923: 141924: 71925: 261926: 121927: 111928: 131929: 141930: 321931: 171932: 171933: 241934: 251935: 151936: 191937: 91938: 131939: 141940: 191941: 271942: 151943: 111944: 121945: 161946: 61947: 161948: 101949: 141950: 161951: 101952: 41953: 121954: 71955: 61956: 231957: 71958: 141959: 121960: 131961: 71962: 121963: 221964: 111965: 101966: 61967: 121968: 51969: 51970: 71971: 71972: 161973: 71974: 141975: 61976: 101977: 141978: 61979: 181980: 121981: 81982: 181983: 161984: 151985: 91986: 101987: 71988: 181989: 261990: 261991: 191992: 71993: 91994: 121995: 101996: 131997: 61998: 171999: 92000: 122001: 62002: 232003: 82004: 52005: 92006: 102007: 72008: 102009: 92010: 152011: 132012: 142013: 102014: 92015: 172016: 132017: 92018: 182019: 62020: 102021: 112022: 52023: 122024: 92025: 31894192319351947195919711983199520072019
1,464 records at Chambersburg 1 ESE still stand. 1930 holds the most, with 32.
Standing records at Chambersburg 1 ESE by the year they were set
Year setStanding records
189416
189525
189630
189710
189810
189911
190018
19013
191722
191817
19217
19228
192314
19247
192526
192612
192711
192813
192914
193032
193117
193217
193324
193425
193515
193619
19379
193813
193914
194019
194127
194215
194311
194412
194516
19466
194716
194810
194914
195016
195110
19524
195312
19547
19556
195623
19577
195814
195912
196013
19617
196212
196322
196411
196510
19666
196712
19685
19695
19707
19717
197216
19737
197414
19756
197610
197714
19786
197918
198012
19818
198218
198316
198415
19859
198610
19877
198818
198926
199026
199119
19927
19939
199412
199510
199613
19976
199817
19999
200012
20016
200223
20038
20045
20059
200610
20077
200810
20099
201015
201113
201214
201310
20149
201517
201613
20179
201818
20196
202010
202111
20225
202312
20249
20253

All-Time Record Progression

6 new records
When Chambersburg 1 ESE set new all-time records 6 all-time records were set at Chambersburg 1 ESE between 2 February 1961 and 23 January 2016. Each dot is a new record. Record low minimum temperatureRecord daily snowfallRecord snow depthRecord high minimum temperature2 February 1961: Record low minimum temperature -26.7 C (-16.1 F)6 March 1962: Record daily snowfall 48.3 cm (19.0 in)19 January 1994: Record low minimum temperature -29.4 C (-20.9 F)12 January 1996: Record snow depth 76.2 cm (30.0 in)24 July 2010: Record high minimum temperature 27.8 C (82.0 F)23 January 2016: Record daily snowfall 66.5 cm (26.2 in)19701980199020002010
6 all-time records were set at Chambersburg 1 ESE between 2 February 1961 and 23 January 2016. Each dot is a new record.
When Chambersburg 1 ESE set new all-time records
DateKindDetail
1961-02-02Record low minimum temperatureRecord low minimum temperature -26.7 C (-16.1 F)
1962-03-06Record daily snowfallRecord daily snowfall 48.3 cm (19.0 in)
1994-01-19Record low minimum temperatureRecord low minimum temperature -29.4 C (-20.9 F)
1996-01-12Record snow depthRecord snow depth 76.2 cm (30.0 in)
2010-07-24Record high minimum temperatureRecord high minimum temperature 27.8 C (82.0 F)
2016-01-23Record daily snowfallRecord daily snowfall 66.5 cm (26.2 in)

Wettest Day of Each Month

Jul: 130.0 mm (5.1 in)
Record daily precipitation for each month at Chambersburg 1 ESE The wettest day on record for each calendar month at Chambersburg 1 ESE. The most was 130.0 mm (5.1 in) on 30 July 1923. 050100150 Jan: 54.9 mm (2.2 in), 1 January 2003 Jan Feb: 80.5 mm (3.2 in), 14 February 1984 Feb Mar: 58.4 mm (2.3 in), 29 March 1984 Mar Apr: 91.4 mm (3.6 in), 20 April 1901 Apr May: 69.9 mm (2.8 in), 5 May 2017 May Jun: 118.1 mm (4.6 in), 22 June 1972 Jun Jul: 130.0 mm (5.1 in), 30 July 1923 Jul Aug: 81.3 mm (3.2 in), 20 August 1947 Aug Sep: 116.3 mm (4.6 in), 1 September 1952 Sep Oct: 101.6 mm (4.0 in), 11 October 2013 Oct Nov: 87.6 mm (3.4 in), 7 November 1997 Nov Dec: 69.9 mm (2.8 in), 24 December 2020 Dec
The wettest day on record for each calendar month at Chambersburg 1 ESE. The most was 130.0 mm (5.1 in) on 30 July 1923.
Record daily precipitation for each month at Chambersburg 1 ESE
MonthRecord daily precipitation (mm)Date
Jan54.9 mm (2.2 in)1 January 2003
Feb80.5 mm (3.2 in)14 February 1984
Mar58.4 mm (2.3 in)29 March 1984
Apr91.4 mm (3.6 in)20 April 1901
May69.9 mm (2.8 in)5 May 2017
Jun118.1 mm (4.6 in)22 June 1972
Jul130.0 mm (5.1 in)30 July 1923
Aug81.3 mm (3.2 in)20 August 1947
Sep116.3 mm (4.6 in)1 September 1952
Oct101.6 mm (4.0 in)11 October 2013
Nov87.6 mm (3.4 in)7 November 1997
Dec69.9 mm (2.8 in)24 December 2020

Period of Record Coverage

1894 to 2025
Days with data per year at Chambersburg 1 ESE 115 years of record at Chambersburg 1 ESE, 1894 to 2025. 16 years have data for under 90 percent of days and are left out of rankings: 1895, 1901, 1918, 1930, 1937, 1943, 1944, 1973 and others. 1894: 333 of 365 days1895: 319 of 365 days1896: 361 of 366 days1897: 347 of 365 days1898: 363 of 365 days1899: 363 of 365 days1900: 361 of 365 days1901: 119 of 365 days1917: 334 of 365 days1918: 182 of 365 days1921: 365 of 365 days1922: 364 of 365 days1923: 365 of 365 days1924: 364 of 366 days1925: 363 of 365 days1926: 364 of 365 days1927: 364 of 365 days1928: 359 of 366 days1929: 338 of 365 days1930: 316 of 365 days1931: 346 of 365 days1932: 348 of 366 days1933: 361 of 365 days1934: 339 of 365 days1935: 354 of 365 days1936: 353 of 366 days1937: 294 of 365 days1938: 350 of 365 days1939: 343 of 365 days1940: 357 of 366 days1941: 364 of 365 days1942: 354 of 365 days1943: 327 of 365 days1944: 323 of 366 days1945: 362 of 365 days1946: 329 of 365 days1947: 359 of 365 days1948: 366 of 366 days1949: 365 of 365 days1950: 364 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 363 of 365 days1958: 363 of 365 days1959: 365 of 365 days1960: 365 of 366 days1961: 364 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 365 of 366 days1965: 365 of 365 days1966: 335 of 365 days1967: 365 of 365 days1968: 335 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 365 of 366 days1973: 303 of 365 days1974: 365 of 365 days1975: 364 of 365 days1976: 366 of 366 days1977: 364 of 365 days1978: 364 of 365 days1979: 365 of 365 days1980: 365 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 365 of 365 days1984: 363 of 366 days1985: 364 of 365 days1986: 361 of 365 days1987: 363 of 365 days1988: 361 of 366 days1989: 364 of 365 days1990: 355 of 365 days1991: 360 of 365 days1992: 273 of 366 days1993: 303 of 365 days1994: 329 of 365 days1995: 331 of 365 days1996: 364 of 366 days1997: 361 of 365 days1998: 329 of 365 days1999: 357 of 365 days2000: 329 of 366 days2001: 338 of 365 days2002: 364 of 365 days2003: 364 of 365 days2004: 363 of 366 days2005: 360 of 365 days2006: 362 of 365 days2007: 364 of 365 days2008: 360 of 366 days2009: 365 of 365 days2010: 341 of 365 days2011: 365 of 365 days2012: 364 of 366 days2013: 364 of 365 days2014: 365 of 365 days2015: 350 of 365 days2016: 366 of 366 days2017: 365 of 365 days2018: 304 of 365 days2019: 275 of 365 days2020: 366 of 366 days2021: 274 of 365 days2022: 245 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 212 of 365 days1935195019651980199520102025
115 years of record at Chambersburg 1 ESE, 1894 to 2025. 16 years have data for under 90 percent of days and are left out of rankings: 1895, 1901, 1918, 1930, 1937, 1943, 1944, 1973 and others.
Days with data per year at Chambersburg 1 ESE
YearDays with dataShare of yearComplete
189433391%Yes
189531987%No
189636199%Yes
189734795%Yes
189836399%Yes
189936399%Yes
190036199%Yes
190111933%No
191733492%Yes
191818250%No
1921365100%Yes
1922364100%Yes
1923365100%Yes
192436499%Yes
192536399%Yes
1926364100%Yes
1927364100%Yes
192835998%Yes
192933893%Yes
193031687%No
193134695%Yes
193234895%Yes
193336199%Yes
193433993%Yes
193535497%Yes
193635396%Yes
193729481%No
193835096%Yes
193934394%Yes
194035798%Yes
1941364100%Yes
194235497%Yes
194332790%No
194432388%No
194536299%Yes
194632990%Yes
194735998%Yes
1948366100%Yes
1949365100%Yes
1950364100%Yes
1951365100%Yes
1952366100%Yes
1953365100%Yes
1954365100%Yes
1955365100%Yes
1956366100%Yes
195736399%Yes
195836399%Yes
1959365100%Yes
1960365100%Yes
1961364100%Yes
1962365100%Yes
1963365100%Yes
1964365100%Yes
1965365100%Yes
196633592%Yes
1967365100%Yes
196833592%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972365100%Yes
197330383%No
1974365100%Yes
1975364100%Yes
1976366100%Yes
1977364100%Yes
1978364100%Yes
1979365100%Yes
1980365100%Yes
1981365100%Yes
1982365100%Yes
1983365100%Yes
198436399%Yes
1985364100%Yes
198636199%Yes
198736399%Yes
198836199%Yes
1989364100%Yes
199035597%Yes
199136099%Yes
199227375%No
199330383%No
199432990%Yes
199533191%Yes
199636499%Yes
199736199%Yes
199832990%Yes
199935798%Yes
200032990%No
200133893%Yes
2002364100%Yes
2003364100%Yes
200436399%Yes
200536099%Yes
200636299%Yes
2007364100%Yes
200836098%Yes
2009365100%Yes
201034193%Yes
2011365100%Yes
201236499%Yes
2013364100%Yes
2014365100%Yes
201535096%Yes
2016366100%Yes
2017365100%Yes
201830483%No
201927575%No
2020366100%Yes
202127475%No
202224567%No
2023365100%Yes
2024366100%Yes
202521258%No

Latest Records

20
Latest records at Chambersburg 1 ESE
DateStationRecordValueBeat old record byOld record stoodSignificance
14 July 2025Chambersburg 1 ESE, USdaily rain67.8 mm (2.7 in)19.0 mm (0.7 in)11 years28 of 100 (Routine)
25 June 2025Chambersburg 1 ESE, USdaily high min (Tie)21.7 C (71.1 F)tie76 years8 of 100 (Routine)
24 June 2025Chambersburg 1 ESE, USdaily high max (Tie)35.6 C (96.1 F)tie130 years10 of 100 (Routine)
23 June 2025Chambersburg 1 ESE, USdaily high max36.1 C (97.0 F)1.1 C (2.0 F)130 years42 of 100 (Notable)
19 June 2025Chambersburg 1 ESE, USdaily high min (Tie)21.7 C (71.1 F)tie48 years6 of 100 (Routine)
28 May 2025Chambersburg 1 ESE, USdaily low max (Tie)13.3 C (55.9 F)tie28 years4 of 100 (Routine)
17 May 2025Chambersburg 1 ESE, USdaily high min17.8 C (64.0 F)0.6 C (1.1 F)60 years29 of 100 (Routine)
13 May 2025Chambersburg 1 ESE, USdaily rain50.3 mm (2.0 in)2.8 mm (0.11 in)127 years42 of 100 (Notable)
5 March 2025Chambersburg 1 ESE, USdaily high min11.1 C (52.0 F)3.3 C (5.9 F)20 years22 of 100 (Routine)
27 February 2025Chambersburg 1 ESE, USdaily high min (Tie)5.0 C (41.0 F)tie74 years8 of 100 (Routine)
11 November 2024Chambersburg 1 ESE, USdaily high max21.7 C (71.1 F)0.6 C (1.1 F)75 years33 of 100 (Routine)
7 November 2024Chambersburg 1 ESE, USdaily high max (Tie)24.4 C (75.9 F)tie86 years8 of 100 (Routine)
6 November 2024Chambersburg 1 ESE, USdaily high max27.2 C (81.0 F)2.8 C (5.0 F)76 years37 of 100 (Notable)
31 October 2024Chambersburg 1 ESE, USdaily high max27.8 C (82.0 F)0.6 C (1.1 F)91 years38 of 100 (Notable)
22 October 2024Chambersburg 1 ESE, USdaily high max (Tie)27.8 C (82.0 F)tie89 years9 of 100 (Routine)
27 September 2024Chambersburg 1 ESE, USdaily high min (Tie)18.9 C (66.0 F)tie17 years3 of 100 (Routine)
28 August 2024Chambersburg 1 ESE, USdaily high min (Tie)22.8 C (73.0 F)tie51 years6 of 100 (Routine)
23 June 2024Chambersburg 1 ESE, USdaily high min25.0 C (77.0 F)3.3 C (5.9 F)37 years29 of 100 (Routine)
22 June 2024Chambersburg 1 ESE, USdaily high max (Tie)36.7 C (98.1 F)tie36 years5 of 100 (Routine)
22 June 2024Chambersburg 1 ESE, USdaily high min (Tie)23.3 C (73.9 F)tie13 years3 of 100 (Routine)

Climate Trend

81 complete years, 1896 to 2024
Annual mean temperature at Chambersburg 1 ESE as warming stripes, 1896 to 2024 One stripe for each of 81 complete years at Chambersburg 1 ESE, 1896 to 2024. Blue stripes are years cooler than the station's own mean of 11.4 C (52.5 F); red stripes are warmer. The coolest year was 1989, at 9.7 C (49.5 F), and the warmest was 2024, at 13.6 C (56.4 F). The strongest colour marks a difference of 2.2 C (4.0 F). 1896: 10.5 C, -0.8 C from the station mean1900: 11.7 C, +0.3 C from the station mean1921: 12.3 C, +0.9 C from the station mean1922: 11.6 C, +0.2 C from the station mean1923: 11.0 C, -0.3 C from the station mean1924: 10.0 C, -1.3 C from the station mean1925: 11.1 C, -0.3 C from the station mean1926: 10.3 C, -1.1 C from the station mean1927: 11.1 C, -0.3 C from the station mean1928: 10.9 C, -0.5 C from the station mean1931: 13.2 C, +1.9 C from the station mean1932: 12.4 C, +1.0 C from the station mean1933: 12.0 C, +0.6 C from the station mean1935: 11.5 C, +0.1 C from the station mean1938: 12.2 C, +0.8 C from the station mean1939: 12.6 C, +1.2 C from the station mean1941: 12.3 C, +0.9 C from the station mean1942: 12.0 C, +0.6 C from the station mean1945: 11.1 C, -0.3 C from the station mean1947: 10.8 C, -0.6 C from the station mean1948: 11.0 C, -0.4 C from the station mean1949: 12.1 C, +0.7 C from the station mean1950: 10.7 C, -0.6 C from the station mean1951: 11.1 C, -0.3 C from the station mean1952: 11.4 C, 0.0 C from the station mean1953: 12.1 C, +0.7 C from the station mean1954: 11.4 C, 0.0 C from the station mean1955: 11.3 C, -0.1 C from the station mean1956: 11.0 C, -0.4 C from the station mean1957: 11.5 C, +0.1 C from the station mean1958: 10.1 C, -1.3 C from the station mean1959: 11.7 C, +0.3 C from the station mean1960: 10.4 C, -1.0 C from the station mean1961: 10.7 C, -0.7 C from the station mean1962: 10.0 C, -1.3 C from the station mean1963: 10.0 C, -1.3 C from the station mean1964: 10.9 C, -0.5 C from the station mean1965: 10.9 C, -0.5 C from the station mean1967: 10.3 C, -1.1 C from the station mean1969: 10.8 C, -0.6 C from the station mean1970: 10.8 C, -0.5 C from the station mean1971: 10.6 C, -0.7 C from the station mean1972: 10.1 C, -1.3 C from the station mean1974: 11.3 C, -0.1 C from the station mean1975: 11.3 C, -0.1 C from the station mean1976: 10.7 C, -0.7 C from the station mean1977: 11.3 C, 0.0 C from the station mean1978: 10.2 C, -1.1 C from the station mean1979: 10.7 C, -0.7 C from the station mean1980: 11.0 C, -0.4 C from the station mean1981: 10.8 C, -0.6 C from the station mean1982: 10.8 C, -0.6 C from the station mean1983: 11.4 C, +0.1 C from the station mean1984: 11.2 C, -0.2 C from the station mean1985: 11.6 C, +0.2 C from the station mean1986: 11.3 C, -0.1 C from the station mean1987: 11.3 C, -0.1 C from the station mean1988: 10.8 C, -0.6 C from the station mean1989: 9.7 C, -1.6 C from the station mean1990: 12.5 C, +1.1 C from the station mean1991: 12.1 C, +0.7 C from the station mean1996: 10.7 C, -0.6 C from the station mean1997: 11.2 C, -0.2 C from the station mean1999: 12.0 C, +0.6 C from the station mean2002: 12.3 C, +0.9 C from the station mean2003: 10.6 C, -0.7 C from the station mean2004: 11.5 C, +0.1 C from the station mean2005: 11.8 C, +0.4 C from the station mean2006: 12.7 C, +1.3 C from the station mean2007: 12.3 C, +0.9 C from the station mean2008: 11.7 C, +0.3 C from the station mean2009: 11.4 C, 0.0 C from the station mean2011: 12.5 C, +1.1 C from the station mean2012: 13.1 C, +1.7 C from the station mean2013: 11.6 C, +0.2 C from the station mean2014: 10.8 C, -0.6 C from the station mean2016: 12.3 C, +0.9 C from the station mean2017: 12.4 C, +1.0 C from the station mean2020: 12.7 C, +1.4 C from the station mean2023: 13.3 C, +1.9 C from the station mean2024: 13.6 C, +2.2 C from the station mean1896191019201930194019501960197019801990200020102020
One stripe for each of 81 complete years at Chambersburg 1 ESE, 1896 to 2024. Blue stripes are years cooler than the station's own mean of 11.4 C (52.5 F); red stripes are warmer. The coolest year was 1989, at 9.7 C (49.5 F), and the warmest was 2024, at 13.6 C (56.4 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Chambersburg 1 ESE as warming stripes, 1896 to 2024
YearAnnual mean temperatureDifference from the station mean
189610.5 C-0.84 C
190011.7 C+0.28 C
192112.3 C+0.91 C
192211.6 C+0.17 C
192311.0 C-0.35 C
192410.0 C-1.34 C
192511.1 C-0.27 C
192610.3 C-1.10 C
192711.1 C-0.30 C
192810.9 C-0.49 C
193113.2 C+1.86 C
193212.4 C+0.97 C
193312.0 C+0.63 C
193511.5 C+0.14 C
193812.2 C+0.77 C
193912.6 C+1.21 C
194112.3 C+0.88 C
194212.0 C+0.59 C
194511.1 C-0.26 C
194710.8 C-0.56 C
194811.0 C-0.40 C
194912.1 C+0.72 C
195010.7 C-0.64 C
195111.1 C-0.30 C
195211.4 C-0.01 C
195312.1 C+0.73 C
195411.4 C-0.01 C
195511.3 C-0.07 C
195611.0 C-0.43 C
195711.5 C+0.13 C
195810.1 C-1.29 C
195911.7 C+0.28 C
196010.4 C-1.01 C
196110.7 C-0.71 C
196210.0 C-1.34 C
196310.0 C-1.34 C
196410.9 C-0.50 C
196510.9 C-0.53 C
196710.3 C-1.13 C
196910.8 C-0.60 C
197010.8 C-0.55 C
197110.6 C-0.75 C
197210.1 C-1.31 C
197411.3 C-0.12 C
197511.3 C-0.06 C
197610.7 C-0.69 C
197711.3 C-0.04 C
197810.2 C-1.15 C
197910.7 C-0.73 C
198011.0 C-0.40 C
198110.8 C-0.58 C
198210.8 C-0.60 C
198311.4 C+0.05 C
198411.2 C-0.21 C
198511.6 C+0.20 C
198611.3 C-0.10 C
198711.3 C-0.08 C
198810.8 C-0.63 C
19899.7 C-1.65 C
199012.5 C+1.10 C
199112.1 C+0.72 C
199610.7 C-0.65 C
199711.2 C-0.17 C
199912.0 C+0.57 C
200212.3 C+0.87 C
200310.6 C-0.74 C
200411.5 C+0.11 C
200511.8 C+0.43 C
200612.7 C+1.30 C
200712.3 C+0.91 C
200811.7 C+0.27 C
200911.4 C-0.02 C
201112.5 C+1.12 C
201213.1 C+1.74 C
201311.6 C+0.23 C
201410.8 C-0.59 C
201612.3 C+0.94 C
201712.4 C+0.98 C
202012.7 C+1.36 C
202313.3 C+1.92 C
202413.6 C+2.17 C

The annual mean temperature here has risen by 0.07 C (0.01 to 0.13) per decade over 1896 to 2024. In Fahrenheit: 0.13 F (0.02 to 0.23) per decade. The slope is a straight line fitted to 81 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Chambersburg 1 ESE
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.07 C (0.01 to 0.13) per decade0.13 F (0.02 to 0.23) per decade1896 to 202481Rise
Mean daily maximum-0.03 C (-0.09 to 0.04) per decade-0.05 F (-0.16 to 0.07) per decade1896 to 202481Not clearly different from zero
Mean daily minimum0.2 C (0.1 to 0.2) per decade0.3 F (0.2 to 0.4) per decade1896 to 202481Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1894 to 2025
Yearly extremes at Chambersburg 1 ESE: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)41.7 C (107.1 F)193636.1 C (97.0 F)115
Coldest night (TNn)-29.4 C (-20.9 F)1994-17.8 C (0.0 F)115
Wettest day (Rx1day)130.0 mm (5.1 in)192357.2 mm (2.3 in)118
Wettest five days (Rx5day)245.1 mm (9.6 in)197287.0 mm (3.4 in)118
Longest dry spell (CDD)39 days200117 days118

Hottest day (TXx)

Hottest day (TXx) at Chambersburg 1 ESE by year The hottest day of the year at Chambersburg 1 ESE, 1894 to 2025. The record is 41.7 C (107.1 F) in 1936, marked on the chart; the median year is 36.1 C (97.0 F). 303540451900192019401960198020002020Record: 41.7 C (107.1 F) in 1936
The hottest day of the year at Chambersburg 1 ESE, 1894 to 2025. The record is 41.7 C (107.1 F) in 1936, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Chambersburg 1 ESE by year
YearHottest day (TXx)
189437.8 C (100.0 F)
189535.6 C (96.1 F)
189635.0 C (95.0 F)
189735.0 C (95.0 F)
189840.6 C (105.1 F)
189936.7 C (98.1 F)
190039.4 C (102.9 F)
190130.6 C (87.1 F)
1914n/a
1915n/a
1916n/a
191738.3 C (100.9 F)
191840.0 C (104.0 F)
192135.6 C (96.1 F)
192234.4 C (93.9 F)
192336.7 C (98.1 F)
192436.1 C (97.0 F)
192537.2 C (99.0 F)
192640.0 C (104.0 F)
192733.9 C (93.0 F)
192833.3 C (91.9 F)
192936.1 C (97.0 F)
193040.6 C (105.1 F)
193138.9 C (102.0 F)
193238.3 C (100.9 F)
193338.9 C (102.0 F)
193440.6 C (105.1 F)
193537.2 C (99.0 F)
193641.7 C (107.1 F)
193736.7 C (98.1 F)
193837.2 C (99.0 F)
193938.3 C (100.9 F)
194038.3 C (100.9 F)
194138.3 C (100.9 F)
194237.8 C (100.0 F)
194337.8 C (100.0 F)
194437.8 C (100.0 F)
194537.2 C (99.0 F)
194637.8 C (100.0 F)
194735.0 C (95.0 F)
194836.7 C (98.1 F)
194938.9 C (102.0 F)
195035.0 C (95.0 F)
195135.0 C (95.0 F)
195236.1 C (97.0 F)
195337.8 C (100.0 F)
195438.9 C (102.0 F)
195537.2 C (99.0 F)
195635.6 C (96.1 F)
195736.7 C (98.1 F)
195833.9 C (93.0 F)
195936.7 C (98.1 F)
196033.3 C (91.9 F)
196134.4 C (93.9 F)
196238.3 C (100.9 F)
196334.4 C (93.9 F)
196435.0 C (95.0 F)
196535.0 C (95.0 F)
196638.9 C (102.0 F)
196735.0 C (95.0 F)
196835.0 C (95.0 F)
196936.1 C (97.0 F)
197033.3 C (91.9 F)
197133.9 C (93.0 F)
197234.4 C (93.9 F)
197336.1 C (97.0 F)
197433.9 C (93.0 F)
197535.0 C (95.0 F)
197633.3 C (91.9 F)
197737.2 C (99.0 F)
197834.4 C (93.9 F)
197932.8 C (91.0 F)
198037.8 C (100.0 F)
198134.4 C (93.9 F)
198234.4 C (93.9 F)
198338.9 C (102.0 F)
198434.4 C (93.9 F)
198533.9 C (93.0 F)
198635.6 C (96.1 F)
198736.7 C (98.1 F)
198839.4 C (102.9 F)
198933.9 C (93.0 F)
199036.1 C (97.0 F)
199138.3 C (100.9 F)
199234.4 C (93.9 F)
199336.7 C (98.1 F)
199435.6 C (96.1 F)
199535.0 C (95.0 F)
199635.6 C (96.1 F)
199736.7 C (98.1 F)
199834.4 C (93.9 F)
199936.7 C (98.1 F)
200033.3 C (91.9 F)
200136.7 C (98.1 F)
200236.7 C (98.1 F)
200332.8 C (91.0 F)
200432.8 C (91.0 F)
200536.1 C (97.0 F)
200636.7 C (98.1 F)
200736.1 C (97.0 F)
200835.6 C (96.1 F)
200933.3 C (91.9 F)
201036.7 C (98.1 F)
201140.0 C (104.0 F)
201238.3 C (100.9 F)
201335.6 C (96.1 F)
201433.3 C (91.9 F)
201533.9 C (93.0 F)
201636.1 C (97.0 F)
201733.3 C (91.9 F)
201833.9 C (93.0 F)
201936.1 C (97.0 F)
202035.0 C (95.0 F)
202135.0 C (95.0 F)
202235.0 C (95.0 F)
202335.6 C (96.1 F)
202437.8 C (100.0 F)
202536.1 C (97.0 F)

Coldest night (TNn)

Coldest night (TNn) at Chambersburg 1 ESE by year The coldest night of the year at Chambersburg 1 ESE, 1894 to 2025. The record is -29.4 C (-20.9 F) in 1994, marked on the chart; the median year is -17.8 C (0.0 F). -30-20-1001900192019401960198020002020Record: -29.4 C (-20.9 F) in 1994
The coldest night of the year at Chambersburg 1 ESE, 1894 to 2025. The record is -29.4 C (-20.9 F) in 1994, marked on the chart; the median year is -17.8 C (0.0 F).
Coldest night (TNn) at Chambersburg 1 ESE by year
YearColdest night (TNn)
1894-20.6 C (-5.1 F)
1895-20.6 C (-5.1 F)
1896-22.2 C (-8.0 F)
1897-19.4 C (-2.9 F)
1898-18.9 C (-2.0 F)
1899-26.1 C (-15.0 F)
1900-22.2 C (-8.0 F)
1901-21.7 C (-7.1 F)
1914n/a
1915n/a
1916n/a
1917-22.2 C (-8.0 F)
1918-23.9 C (-11.0 F)
1921-20.6 C (-5.1 F)
1922-19.4 C (-2.9 F)
1923-15.0 C (5.0 F)
1924-18.9 C (-2.0 F)
1925-25.0 C (-13.0 F)
1926-18.9 C (-2.0 F)
1927-15.0 C (5.0 F)
1928-15.6 C (3.9 F)
1929-16.7 C (1.9 F)
1930-24.4 C (-11.9 F)
1931-11.1 C (12.0 F)
1932-16.1 C (3.0 F)
1933-18.3 C (-0.9 F)
1934-23.9 C (-11.0 F)
1935-24.4 C (-11.9 F)
1936-23.3 C (-9.9 F)
1937-14.4 C (6.1 F)
1938-15.6 C (3.9 F)
1939-15.0 C (5.0 F)
1940-17.2 C (1.0 F)
1941-11.7 C (10.9 F)
1942-19.4 C (-2.9 F)
1943-17.8 C (0.0 F)
1944-16.1 C (3.0 F)
1945-20.0 C (-4.0 F)
1946-18.3 C (-0.9 F)
1947-17.2 C (1.0 F)
1948-22.2 C (-8.0 F)
1949-17.8 C (0.0 F)
1950-20.0 C (-4.0 F)
1951-20.6 C (-5.1 F)
1952-12.8 C (9.0 F)
1953-9.4 C (15.1 F)
1954-16.1 C (3.0 F)
1955-17.8 C (0.0 F)
1956-13.9 C (7.0 F)
1957-21.1 C (-6.0 F)
1958-17.8 C (0.0 F)
1959-18.3 C (-0.9 F)
1960-25.0 C (-13.0 F)
1961-26.7 C (-16.1 F)
1962-23.9 C (-11.0 F)
1963-22.8 C (-9.0 F)
1964-22.2 C (-8.0 F)
1965-17.8 C (0.0 F)
1966-19.4 C (-2.9 F)
1967-22.2 C (-8.0 F)
1968-23.9 C (-11.0 F)
1969-17.2 C (1.0 F)
1970-18.9 C (-2.0 F)
1971-16.7 C (1.9 F)
1972-19.4 C (-2.9 F)
1973-16.7 C (1.9 F)
1974-15.6 C (3.9 F)
1975-17.8 C (0.0 F)
1976-17.8 C (0.0 F)
1977-21.7 C (-7.1 F)
1978-20.0 C (-4.0 F)
1979-23.3 C (-9.9 F)
1980-17.8 C (0.0 F)
1981-17.8 C (0.0 F)
1982-23.9 C (-11.0 F)
1983-20.6 C (-5.1 F)
1984-23.3 C (-9.9 F)
1985-24.4 C (-11.9 F)
1986-15.6 C (3.9 F)
1987-21.1 C (-6.0 F)
1988-17.2 C (1.0 F)
1989-20.0 C (-4.0 F)
1990-13.9 C (7.0 F)
1991-13.9 C (7.0 F)
1992-13.9 C (7.0 F)
1993-18.9 C (-2.0 F)
1994-29.4 C (-20.9 F)
1995-16.1 C (3.0 F)
1996-22.8 C (-9.0 F)
1997-17.8 C (0.0 F)
1998-16.7 C (1.9 F)
1999-15.6 C (3.9 F)
2000-16.1 C (3.0 F)
2001-14.4 C (6.1 F)
2002-12.2 C (10.0 F)
2003-17.2 C (1.0 F)
2004-16.7 C (1.9 F)
2005-16.1 C (3.0 F)
2006-13.3 C (8.1 F)
2007-16.1 C (3.0 F)
2008-13.3 C (8.1 F)
2009-18.3 C (-0.9 F)
2010-11.7 C (10.9 F)
2011-16.1 C (3.0 F)
2012-12.2 C (10.0 F)
2013-13.3 C (8.1 F)
2014-19.4 C (-2.9 F)
2015-18.3 C (-0.9 F)
2016-15.0 C (5.0 F)
2017-13.9 C (7.0 F)
2018-18.3 C (-0.9 F)
2019-8.9 C (16.0 F)
2020-11.1 C (12.0 F)
2021-11.1 C (12.0 F)
2022-17.2 C (1.0 F)
2023-12.8 C (9.0 F)
2024-13.3 C (8.1 F)
2025-20.0 C (-4.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Chambersburg 1 ESE by year The wettest day of the year at Chambersburg 1 ESE, 1894 to 2025. The record is 130.0 mm (5.1 in) in 1923, marked on the chart; the median year is 57.2 mm (2.3 in). 0501001501900192019401960198020002020Record: 130.0 mm (5.1 in) in 1923
The wettest day of the year at Chambersburg 1 ESE, 1894 to 2025. The record is 130.0 mm (5.1 in) in 1923, marked on the chart; the median year is 57.2 mm (2.3 in).
Wettest day (Rx1day) at Chambersburg 1 ESE by year
YearWettest day (Rx1day)
189451.1 mm (2.0 in)
1895111.8 mm (4.4 in)
189668.6 mm (2.7 in)
189771.1 mm (2.8 in)
189864.0 mm (2.5 in)
189958.4 mm (2.3 in)
190048.3 mm (1.9 in)
190191.4 mm (3.6 in)
191440.6 mm (1.6 in)
191554.6 mm (2.1 in)
191644.2 mm (1.7 in)
191757.2 mm (2.3 in)
191857.2 mm (2.3 in)
192163.8 mm (2.5 in)
192273.2 mm (2.9 in)
1923130.0 mm (5.1 in)
192459.9 mm (2.4 in)
192540.4 mm (1.6 in)
192654.9 mm (2.2 in)
192782.0 mm (3.2 in)
192855.9 mm (2.2 in)
192988.4 mm (3.5 in)
193034.0 mm (1.3 in)
193175.9 mm (3.0 in)
193251.6 mm (2.0 in)
193372.6 mm (2.9 in)
1934104.6 mm (4.1 in)
193562.7 mm (2.5 in)
193656.9 mm (2.2 in)
193743.9 mm (1.7 in)
193836.6 mm (1.4 in)
193959.4 mm (2.3 in)
194045.2 mm (1.8 in)
194143.2 mm (1.7 in)
194255.6 mm (2.2 in)
194346.7 mm (1.8 in)
194446.0 mm (1.8 in)
194553.6 mm (2.1 in)
194685.3 mm (3.4 in)
194781.3 mm (3.2 in)
194847.8 mm (1.9 in)
194948.0 mm (1.9 in)
195065.5 mm (2.6 in)
195162.5 mm (2.5 in)
1952116.3 mm (4.6 in)
195352.6 mm (2.1 in)
195481.3 mm (3.2 in)
195570.9 mm (2.8 in)
195669.3 mm (2.7 in)
195752.1 mm (2.1 in)
195865.0 mm (2.6 in)
195990.9 mm (3.6 in)
196040.9 mm (1.6 in)
196127.7 mm (1.1 in)
196275.4 mm (3.0 in)
196343.7 mm (1.7 in)
196440.6 mm (1.6 in)
196556.6 mm (2.2 in)
196652.8 mm (2.1 in)
196750.5 mm (2.0 in)
196842.4 mm (1.7 in)
196942.9 mm (1.7 in)
1970110.5 mm (4.4 in)
197153.3 mm (2.1 in)
1972118.1 mm (4.6 in)
197391.9 mm (3.6 in)
197448.8 mm (1.9 in)
197570.6 mm (2.8 in)
197662.7 mm (2.5 in)
197742.2 mm (1.7 in)
197847.0 mm (1.9 in)
197977.0 mm (3.0 in)
198033.5 mm (1.3 in)
198143.9 mm (1.7 in)
198237.6 mm (1.5 in)
198345.0 mm (1.8 in)
198480.5 mm (3.2 in)
198549.5 mm (1.9 in)
198640.6 mm (1.6 in)
198751.6 mm (2.0 in)
198855.4 mm (2.2 in)
198955.6 mm (2.2 in)
199074.9 mm (2.9 in)
199138.6 mm (1.5 in)
199267.3 mm (2.6 in)
199348.3 mm (1.9 in)
199467.3 mm (2.6 in)
199551.8 mm (2.0 in)
199675.4 mm (3.0 in)
199787.6 mm (3.4 in)
199881.0 mm (3.2 in)
199943.7 mm (1.7 in)
200053.8 mm (2.1 in)
200150.8 mm (2.0 in)
200273.2 mm (2.9 in)
200359.2 mm (2.3 in)
200486.4 mm (3.4 in)
200583.8 mm (3.3 in)
200697.5 mm (3.8 in)
200755.9 mm (2.2 in)
200863.5 mm (2.5 in)
200961.7 mm (2.4 in)
201070.1 mm (2.8 in)
201154.6 mm (2.1 in)
201280.8 mm (3.2 in)
2013101.6 mm (4.0 in)
201466.0 mm (2.6 in)
201559.7 mm (2.4 in)
201659.9 mm (2.4 in)
201769.9 mm (2.8 in)
201873.2 mm (2.9 in)
201942.9 mm (1.7 in)
202069.9 mm (2.8 in)
202139.1 mm (1.5 in)
202244.2 mm (1.7 in)
202342.7 mm (1.7 in)
202440.6 mm (1.6 in)
202567.8 mm (2.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Chambersburg 1 ESE by year The wettest five days of the year at Chambersburg 1 ESE, 1894 to 2025. The record is 245.1 mm (9.6 in) in 1972, marked on the chart; the median year is 87.0 mm (3.4 in). 01002003001900192019401960198020002020Record: 245.1 mm (9.6 in) in 1972
The wettest five days of the year at Chambersburg 1 ESE, 1894 to 2025. The record is 245.1 mm (9.6 in) in 1972, marked on the chart; the median year is 87.0 mm (3.4 in).
Wettest five days (Rx5day) at Chambersburg 1 ESE by year
YearWettest five days (Rx5day)
1894130.3 mm (5.1 in)
189538.1 mm (1.5 in)
189668.6 mm (2.7 in)
189744.2 mm (1.7 in)
189862.5 mm (2.5 in)
189955.4 mm (2.2 in)
190049.8 mm (2.0 in)
190126.9 mm (1.1 in)
191445.3 mm (1.8 in)
191587.4 mm (3.4 in)
191636.0 mm (1.4 in)
1917109.0 mm (4.3 in)
191868.9 mm (2.7 in)
192183.0 mm (3.3 in)
192297.4 mm (3.8 in)
1923149.6 mm (5.9 in)
192494.0 mm (3.7 in)
192566.8 mm (2.6 in)
192690.2 mm (3.6 in)
192796.8 mm (3.8 in)
192896.0 mm (3.8 in)
1929117.3 mm (4.6 in)
193051.3 mm (2.0 in)
193191.6 mm (3.6 in)
193276.2 mm (3.0 in)
1933131.5 mm (5.2 in)
1934139.7 mm (5.5 in)
193580.5 mm (3.2 in)
193673.9 mm (2.9 in)
193788.6 mm (3.5 in)
193868.4 mm (2.7 in)
1939111.7 mm (4.4 in)
194071.4 mm (2.8 in)
194170.2 mm (2.8 in)
1942115.8 mm (4.6 in)
194398.5 mm (3.9 in)
194459.9 mm (2.4 in)
1945122.5 mm (4.8 in)
194696.7 mm (3.8 in)
1947110.5 mm (4.4 in)
194873.7 mm (2.9 in)
1949104.1 mm (4.1 in)
195087.1 mm (3.4 in)
1951116.6 mm (4.6 in)
1952161.7 mm (6.4 in)
195387.1 mm (3.4 in)
195488.2 mm (3.5 in)
195586.9 mm (3.4 in)
195679.2 mm (3.1 in)
195783.4 mm (3.3 in)
1958106.9 mm (4.2 in)
195991.2 mm (3.6 in)
196072.2 mm (2.8 in)
196153.6 mm (2.1 in)
196277.2 mm (3.0 in)
196370.8 mm (2.8 in)
196471.5 mm (2.8 in)
196565.5 mm (2.6 in)
196664.5 mm (2.5 in)
1967100.9 mm (4.0 in)
196872.9 mm (2.9 in)
196982.3 mm (3.2 in)
1970117.6 mm (4.6 in)
197178.5 mm (3.1 in)
1972245.1 mm (9.6 in)
1973102.8 mm (4.0 in)
197465.8 mm (2.6 in)
1975180.6 mm (7.1 in)
1976114.8 mm (4.5 in)
197760.5 mm (2.4 in)
197892.9 mm (3.7 in)
197981.9 mm (3.2 in)
198057.7 mm (2.3 in)
198197.0 mm (3.8 in)
198271.8 mm (2.8 in)
198386.9 mm (3.4 in)
198493.7 mm (3.7 in)
198574.4 mm (2.9 in)
198685.5 mm (3.4 in)
198784.6 mm (3.3 in)
1988126.8 mm (5.0 in)
198983.8 mm (3.3 in)
1990102.8 mm (4.0 in)
199155.6 mm (2.2 in)
1992105.4 mm (4.1 in)
199371.9 mm (2.8 in)
199489.6 mm (3.5 in)
199571.9 mm (2.8 in)
1996113.8 mm (4.5 in)
1997107.7 mm (4.2 in)
199890.2 mm (3.6 in)
199970.8 mm (2.8 in)
200076.2 mm (3.0 in)
200170.6 mm (2.8 in)
2002111.8 mm (4.4 in)
2003129.6 mm (5.1 in)
2004116.1 mm (4.6 in)
200596.8 mm (3.8 in)
2006220.2 mm (8.7 in)
200780.0 mm (3.1 in)
200897.8 mm (3.9 in)
200998.8 mm (3.9 in)
2010128.2 mm (5.0 in)
2011142.0 mm (5.6 in)
2012105.6 mm (4.2 in)
2013168.2 mm (6.6 in)
201481.2 mm (3.2 in)
201570.1 mm (2.8 in)
201692.6 mm (3.6 in)
201778.8 mm (3.1 in)
2018138.4 mm (5.4 in)
201983.5 mm (3.3 in)
202090.2 mm (3.6 in)
202148.6 mm (1.9 in)
202277.4 mm (3.0 in)
202370.1 mm (2.8 in)
202484.0 mm (3.3 in)
2025107.9 mm (4.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Chambersburg 1 ESE by year The longest dry spell of the year at Chambersburg 1 ESE, 1894 to 2025. The record is 39 days in 2001, marked on the chart; the median year is 17 days. 0102030401900192019401960198020002020Record: 39 days in 2001
The longest dry spell of the year at Chambersburg 1 ESE, 1894 to 2025. The record is 39 days in 2001, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Chambersburg 1 ESE by year
YearLongest dry spell (CDD)
189412 days
189515 days
189610 days
18978 days
18982 days
18998 days
19009 days
190112 days
191411 days
191518 days
191611 days
19173 days
191817 days
192115 days
192224 days
192320 days
192427 days
192516 days
192617 days
192713 days
192814 days
192917 days
193034 days
193128 days
193220 days
193312 days
193418 days
193517 days
193617 days
193716 days
193814 days
193923 days
194014 days
194128 days
194214 days
194319 days
194430 days
194515 days
194615 days
194724 days
194811 days
194915 days
195015 days
195116 days
195228 days
195318 days
195413 days
195522 days
195614 days
195717 days
195823 days
195912 days
196012 days
196117 days
196215 days
196327 days
196427 days
196516 days
196621 days
196724 days
196826 days
196917 days
197015 days
197117 days
197215 days
197316 days
197417 days
197514 days
197623 days
197718 days
197816 days
197915 days
198014 days
198131 days
198215 days
198314 days
198417 days
198521 days
198619 days
198719 days
198831 days
198918 days
199013 days
199123 days
199216 days
199318 days
199416 days
199524 days
199613 days
199713 days
199820 days
199917 days
200014 days
200139 days
200216 days
200313 days
200417 days
200524 days
200622 days
200713 days
200826 days
200918 days
201019 days
201113 days
201213 days
201315 days
201412 days
201518 days
201619 days
201731 days
201812 days
201914 days
202015 days
202116 days
202217 days
202322 days
202426 days
202516 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

81 years with a frost

Across 81 years with a frost, the median last spring frost at Chambersburg 1 ESE falls on 28 April and the median first autumn frost on 17 October, which leaves a median of 173 days between them.

In 1982 to 2024 the median growing season was 186 days. That is 18 days more than in 1896 to 1957.

Fitted over all years, the growing season changes by +2.6 days per decade at this station.

Frost dates and growing season at Chambersburg 1 ESE
MeasureMedian, all yearsEarliest period (1896 to 1957)Recent period (1982 to 2024)Recent against earliestFitted trend
Last spring frost28 April30 April25 April5 days earlier-0.9 days per decade
First autumn frost17 October12 October25 October13 days later+1.7 days per decade
Growing days173 days168 days186 days18 days more+2.6 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

98 years, 1915 to 2024

A day with at least 58.4 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 130.1 mm (5.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Chambersburg 1 ESE: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years58.4 mm (2.3 in)
5 years76.3 mm (3.0 in)
10 years88.7 mm (3.5 in)
25 years104.9 mm (4.1 in)
50 years117.3 mm (4.6 in)
100 years130.1 mm (5.1 in)Longer than the 98 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 98 years of values from 1915 to 2024.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 130.0 mm (5.1 in) in 1923; 118.1 mm (4.6 in) in 1972; 116.3 mm (4.6 in) in 1952.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Climate Twins

2004 to 2024 against 1961 to 1990

Over 2004 to 2024, Chambersburg 1 ESE had a mean temperature of 12.2 C (54.0 F) and 1,060.7 mm (41.8 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Washington Dulles Intl AP (United States, 112 km away), Beltsville Plt STN 5 (United States, 117 km away) and Upper Marlboro 3 NNW (United States, 141 km away).

Climate twins of Chambersburg 1 ESE: stations whose 1961 to 1990 climate is closest to its 2004 to 2024 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
Washington Dulles Intl APUnited States112 km (70 mi)12.2 C (53.9 F)1,022.4 mm (40.3 in)0.41
Beltsville Plt STN 5United States117 km (73 mi)12.1 C (53.8 F)1,045.9 mm (41.2 in)0.44
Upper Marlboro 3 NNWUnited States141 km (88 mi)12.3 C (54.1 F)1,069.1 mm (42.1 in)0.44

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

  • Data for Chambersburg 1 ESE standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Chambersburg 1 ESE threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).