Built 2026-10-19 (19 October 2026)

Old Town Weather Records (USC00176420)

Record envelope, standing records and threshold days for Old Town (USC00176420), Maine, United States, with 36 years of record.

Key Facts for Old Town

  • Old Town (USC00176420) is a weather station in Maine, United States at 44.93 latitude and -68.65 longitude, 34 m (112 ft) above sea level.
  • The station reports from 1921 to 1956, 36 years of record.
  • 1,464 records set at Old Town still stand.
  • Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
  • Old Town set a daily record low maximum temperature of 16.7 C (62.1 F) on 31 August 1956.

About the Station

  • Location: Maine, United States, 44.93 latitude, -68.65 longitude.
  • Elevation: 34 m (112 ft).
  • Period of record: 1921 to 1956, 36 years.
  • Eligible elements: tmax, tmin, prcp, snow.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Old Town, with 2026 drawn through them The band shows the record high and record low for each calendar day at Old Town. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Old Town. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Old Town, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan15.0 C (59.0 F)-35.6 C (-32.1 F)n/an/a
Feb15.0 C (59.0 F)-33.3 C (-27.9 F)n/an/a
Mar25.6 C (78.1 F)-27.8 C (-18.0 F)n/an/a
Apr31.7 C (89.1 F)-15.6 C (3.9 F)n/an/a
May33.3 C (91.9 F)-5.0 C (23.0 F)n/an/a
Jun34.4 C (93.9 F)0.6 C (33.1 F)n/an/a
Jul38.9 C (102.0 F)5.6 C (42.1 F)n/an/a
Aug37.8 C (100.0 F)2.2 C (36.0 F)n/an/a
Sep33.3 C (91.9 F)-2.8 C (27.0 F)n/an/a
Oct28.9 C (84.0 F)-9.4 C (15.1 F)n/an/a
Nov21.7 C (71.1 F)-18.3 C (-0.9 F)n/an/a
Dec16.7 C (62.1 F)-33.9 C (-29.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Old Town by the year they were set 1,464 records at Old Town still stand. 1921 holds the most, with 62. 0204060801921: 621922: 431923: 521924: 251925: 521926: 581927: 341928: 411929: 341930: 441931: 261932: 341933: 391934: 581935: 301936: 541937: 321938: 451939: 301940: 251941: 251942: 361943: 391944: 411945: 501946: 421947: 441948: 371949: 511950: 461951: 381952: 391953: 601954: 391955: 281956: 31192119251929193319371941194519491953
1,464 records at Old Town still stand. 1921 holds the most, with 62.
Standing records at Old Town by the year they were set
Year setStanding records
192162
192243
192352
192425
192552
192658
192734
192841
192934
193044
193126
193234
193339
193458
193530
193654
193732
193845
193930
194025
194125
194236
194339
194441
194550
194642
194744
194837
194951
195046
195138
195239
195360
195439
195528
195631

All-Time Record Progression

1 new records
When Old Town set new all-time records 1 all-time records were set at Old Town between 7 July 1952 and 7 July 1952. Each dot is a new record. Record high maximum temperature7 July 1952: Record high maximum temperature 38.9 C (102.0 F)
1 all-time records were set at Old Town between 7 July 1952 and 7 July 1952. Each dot is a new record.
When Old Town set new all-time records
DateKindDetail
1952-07-07Record high maximum temperatureRecord high maximum temperature 38.9 C (102.0 F)

Wettest Day of Each Month

Jun: 127.8 mm (5.0 in)
Record daily precipitation for each month at Old Town The wettest day on record for each calendar month at Old Town. The most was 127.8 mm (5.0 in) on 22 June 1922. 050100150 Jan: 52.6 mm (2.1 in), 10 January 1935 Jan Feb: 38.4 mm (1.5 in), 23 February 1934 Feb Mar: 56.4 mm (2.2 in), 9 March 1942 Mar Apr: 86.1 mm (3.4 in), 13 April 1940 Apr May: 53.6 mm (2.1 in), 11 May 1945 May Jun: 127.8 mm (5.0 in), 22 June 1922 Jun Jul: 61.2 mm (2.4 in), 19 July 1926 Jul Aug: 46.2 mm (1.8 in), 4 August 1932 Aug Sep: 106.2 mm (4.2 in), 12 September 1954 Sep Oct: 73.2 mm (2.9 in), 31 October 1939 Oct Nov: 68.6 mm (2.7 in), 23 November 1943 Nov Dec: 52.1 mm (2.1 in), 3 December 1939 Dec
The wettest day on record for each calendar month at Old Town. The most was 127.8 mm (5.0 in) on 22 June 1922.
Record daily precipitation for each month at Old Town
MonthRecord daily precipitation (mm)Date
Jan52.6 mm (2.1 in)10 January 1935
Feb38.4 mm (1.5 in)23 February 1934
Mar56.4 mm (2.2 in)9 March 1942
Apr86.1 mm (3.4 in)13 April 1940
May53.6 mm (2.1 in)11 May 1945
Jun127.8 mm (5.0 in)22 June 1922
Jul61.2 mm (2.4 in)19 July 1926
Aug46.2 mm (1.8 in)4 August 1932
Sep106.2 mm (4.2 in)12 September 1954
Oct73.2 mm (2.9 in)31 October 1939
Nov68.6 mm (2.7 in)23 November 1943
Dec52.1 mm (2.1 in)3 December 1939

Period of Record Coverage

1921 to 1956
Days with data per year at Old Town 36 years of record at Old Town, 1921 to 1956. 1 years have data for under 90 percent of days and are left out of rankings: 1956. 1921: 357 of 365 days1922: 358 of 365 days1923: 356 of 365 days1924: 353 of 366 days1925: 359 of 365 days1926: 359 of 365 days1927: 356 of 365 days1928: 354 of 366 days1929: 338 of 365 days1930: 365 of 365 days1931: 365 of 365 days1932: 363 of 366 days1933: 364 of 365 days1934: 363 of 365 days1935: 334 of 365 days1936: 365 of 366 days1937: 365 of 365 days1938: 365 of 365 days1939: 365 of 365 days1940: 366 of 366 days1941: 363 of 365 days1942: 363 of 365 days1943: 363 of 365 days1944: 365 of 366 days1945: 365 of 365 days1946: 364 of 365 days1947: 364 of 365 days1948: 364 of 366 days1949: 364 of 365 days1950: 364 of 365 days1951: 360 of 365 days1952: 366 of 366 days1953: 363 of 365 days1954: 361 of 365 days1955: 364 of 365 days1956: 201 of 366 days1925193019351940194519501955
36 years of record at Old Town, 1921 to 1956. 1 years have data for under 90 percent of days and are left out of rankings: 1956.
Days with data per year at Old Town
YearDays with dataShare of yearComplete
192135798%Yes
192235898%Yes
192335698%Yes
192435396%Yes
192535998%Yes
192635998%Yes
192735698%Yes
192835497%Yes
192933893%Yes
1930365100%Yes
1931365100%Yes
193236399%Yes
1933364100%Yes
193436399%Yes
193533492%Yes
1936365100%Yes
1937365100%Yes
1938365100%Yes
1939365100%Yes
1940366100%Yes
194136399%Yes
194236399%Yes
194336399%Yes
1944365100%Yes
1945365100%Yes
1946364100%Yes
1947364100%Yes
194836499%Yes
1949364100%Yes
1950364100%Yes
195136099%Yes
1952366100%Yes
195336399%Yes
195436199%Yes
1955364100%Yes
195620155%No

Latest Records

20
Latest records at Old Town
DateStationRecordValueBeat old record byOld record stoodSignificance
31 August 1956Old Town, USdaily low max16.7 C (62.1 F)1.1 C (2.0 F)30 years15 of 100 (Routine)
30 August 1956Old Town, USmonthly low min (Tie)2.2 C (36.0 F)tie31 years5 of 100 (Routine)
5 August 1956Old Town, USdaily low max21.1 C (70.0 F)0.6 C (1.1 F)3 years4 of 100 (Routine)
30 July 1956Old Town, USdaily low min8.3 C (46.9 F)0.6 C (1.1 F)34 years14 of 100 (Routine)
18 July 1956Old Town, USdaily low min8.9 C (48.0 F)1.1 C (2.0 F)32 years15 of 100 (Routine)
14 July 1956Old Town, USdaily rain52.1 mm (2.1 in)29.2 mm (1.1 in)26 years39 of 100 (Notable)
7 July 1956Old Town, USmonthly low max (Tie)15.6 C (60.1 F)tie32 years5 of 100 (Routine)
2 July 1956Old Town, USdaily high min20.0 C (68.0 F)1.7 C (3.1 F)10 years11 of 100 (Routine)
19 June 1956Old Town, USdaily low min3.3 C (37.9 F)1.7 C (3.1 F)12 years10 of 100 (Routine)
16 June 1956Old Town, USdaily high max32.8 C (91.0 F)2.2 C (4.0 F)26 years15 of 100 (Routine)
15 June 1956Old Town, USmonthly high max (Tie)34.4 C (93.9 F)tie31 years5 of 100 (Routine)
14 June 1956Old Town, USdaily high max31.7 C (89.1 F)2.3 C (4.1 F)14 years12 of 100 (Routine)
13 June 1956Old Town, USdaily high max (Tie)31.7 C (89.1 F)tie14 years1 of 100 (Routine)
11 June 1956Old Town, USdaily low max (Tie)15.0 C (59.0 F)tie15 years1 of 100 (Routine)
10 June 1956Old Town, USdaily low max11.1 C (52.0 F)2.2 C (4.0 F)25 years15 of 100 (Routine)
9 June 1956Old Town, USdaily low max8.9 C (48.0 F)2.8 C (5.0 F)9 years11 of 100 (Routine)
9 June 1956Old Town, USdaily low min (Tie)3.9 C (39.0 F)tie13 years1 of 100 (Routine)
29 May 1956Old Town, USdaily low min1.1 C (34.0 F)2.8 C (5.0 F)26 years17 of 100 (Routine)
28 May 1956Old Town, USdaily low max9.4 C (48.9 F)1.2 C (2.2 F)29 years13 of 100 (Routine)
27 May 1956Old Town, USdaily rain20.6 mm (0.8 in)4.3 mm (0.17 in)26 years15 of 100 (Routine)

Climate Trend

34 complete years, 1921 to 1955
Annual mean temperature at Old Town as warming stripes, 1921 to 1955 One stripe for each of 34 complete years at Old Town, 1921 to 1955. Blue stripes are years cooler than the station's own mean of 7.2 C (44.9 F); red stripes are warmer. The coolest year was 1926, at 5.1 C (41.2 F), and the warmest was 1952, at 9.1 C (48.4 F). The strongest colour marks a difference of 2.1 C (3.8 F). 1921: 7.4 C, +0.2 C from the station mean1922: 6.4 C, -0.7 C from the station mean1923: 5.8 C, -1.3 C from the station mean1924: 6.1 C, -1.0 C from the station mean1925: 7.1 C, -0.1 C from the station mean1926: 5.1 C, -2.0 C from the station mean1927: 7.0 C, -0.1 C from the station mean1928: 6.1 C, -1.0 C from the station mean1929: 6.3 C, -0.8 C from the station mean1930: 7.4 C, +0.2 C from the station mean1931: 8.1 C, +0.9 C from the station mean1932: 7.8 C, +0.6 C from the station mean1933: 7.1 C, -0.1 C from the station mean1934: 6.3 C, -0.8 C from the station mean1936: 6.9 C, -0.3 C from the station mean1937: 8.2 C, +1.0 C from the station mean1938: 7.8 C, +0.6 C from the station mean1939: 6.4 C, -0.7 C from the station mean1940: 6.5 C, -0.7 C from the station mean1941: 7.5 C, +0.3 C from the station mean1942: 7.5 C, +0.4 C from the station mean1943: 6.6 C, -0.6 C from the station mean1944: 7.3 C, +0.1 C from the station mean1945: 6.5 C, -0.7 C from the station mean1946: 7.5 C, +0.4 C from the station mean1947: 7.6 C, +0.5 C from the station mean1948: 7.0 C, -0.1 C from the station mean1949: 8.4 C, +1.2 C from the station mean1950: 7.1 C, 0.0 C from the station mean1951: 8.2 C, +1.1 C from the station mean1952: 9.1 C, +2.0 C from the station mean1953: 8.6 C, +1.5 C from the station mean1954: 7.3 C, +0.1 C from the station mean1955: 7.1 C, -0.1 C from the station mean19211925193019351940194519501955
One stripe for each of 34 complete years at Old Town, 1921 to 1955. Blue stripes are years cooler than the station's own mean of 7.2 C (44.9 F); red stripes are warmer. The coolest year was 1926, at 5.1 C (41.2 F), and the warmest was 1952, at 9.1 C (48.4 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Old Town as warming stripes, 1921 to 1955
YearAnnual mean temperatureDifference from the station mean
19217.4 C+0.24 C
19226.4 C-0.72 C
19235.8 C-1.33 C
19246.1 C-1.04 C
19257.1 C-0.09 C
19265.1 C-2.03 C
19277.0 C-0.12 C
19286.1 C-1.04 C
19296.3 C-0.83 C
19307.4 C+0.23 C
19318.1 C+0.95 C
19327.8 C+0.61 C
19337.1 C-0.07 C
19346.3 C-0.82 C
19366.9 C-0.29 C
19378.2 C+1.05 C
19387.8 C+0.60 C
19396.4 C-0.72 C
19406.5 C-0.70 C
19417.5 C+0.33 C
19427.5 C+0.38 C
19436.6 C-0.56 C
19447.3 C+0.14 C
19456.5 C-0.70 C
19467.5 C+0.36 C
19477.6 C+0.48 C
19487.0 C-0.12 C
19498.4 C+1.24 C
19507.1 C-0.01 C
19518.2 C+1.06 C
19529.1 C+1.98 C
19538.6 C+1.49 C
19547.3 C+0.12 C
19557.1 C-0.05 C

The annual mean temperature here has risen by 0.4 C (0.2 to 0.7) per decade over 1921 to 1955. In Fahrenheit: 0.8 F (0.3 to 1.2) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Old Town
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.4 C (0.2 to 0.7) per decade0.8 F (0.3 to 1.2) per decade1921 to 195534Rise
Mean daily maximum0.4 C (0.2 to 0.7) per decade0.8 F (0.3 to 1.3) per decade1921 to 195534Rise
Mean daily minimum0.4 C (0.2 to 0.7) per decade0.8 F (0.3 to 1.2) per decade1921 to 195534Rise

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

1921 to 1956
Yearly extremes at Old Town: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)38.9 C (102.0 F)195233.3 C (91.9 F)36
Coldest night (TNn)-35.6 C (-32.1 F)1925-26.7 C (-16.1 F)36
Wettest day (Rx1day)127.8 mm (5.0 in)192253.1 mm (2.1 in)36
Wettest five days (Rx5day)195.9 mm (7.7 in)195483.9 mm (3.3 in)36
Longest dry spell (CDD)34 days192415 days36

Hottest day (TXx)

Hottest day (TXx) at Old Town by year The hottest day of the year at Old Town, 1921 to 1956. The record is 38.9 C (102.0 F) in 1952, marked on the chart; the median year is 33.3 C (91.9 F). 27.53032.53537.540193019401950Record: 38.9 C (102.0 F) in 1952
The hottest day of the year at Old Town, 1921 to 1956. The record is 38.9 C (102.0 F) in 1952, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at Old Town by year
YearHottest day (TXx)
192133.9 C (93.0 F)
192232.8 C (91.0 F)
192333.3 C (91.9 F)
192432.2 C (90.0 F)
192534.4 C (93.9 F)
192633.9 C (93.0 F)
192732.2 C (90.0 F)
192832.2 C (90.0 F)
192933.3 C (91.9 F)
193031.7 C (89.1 F)
193133.3 C (91.9 F)
193232.8 C (91.0 F)
193332.2 C (90.0 F)
193431.1 C (88.0 F)
193535.0 C (95.0 F)
193629.4 C (84.9 F)
193733.3 C (91.9 F)
193832.8 C (91.0 F)
193932.2 C (90.0 F)
194030.6 C (87.1 F)
194133.9 C (93.0 F)
194232.2 C (90.0 F)
194333.3 C (91.9 F)
194435.0 C (95.0 F)
194531.1 C (88.0 F)
194633.9 C (93.0 F)
194733.9 C (93.0 F)
194832.8 C (91.0 F)
194935.6 C (96.1 F)
195032.2 C (90.0 F)
195131.7 C (89.1 F)
195238.9 C (102.0 F)
195335.0 C (95.0 F)
195433.3 C (91.9 F)
195535.0 C (95.0 F)
195634.4 C (93.9 F)

Coldest night (TNn)

Coldest night (TNn) at Old Town by year The coldest night of the year at Old Town, 1921 to 1956. The record is -35.6 C (-32.1 F) in 1925, marked on the chart; the median year is -26.7 C (-16.1 F). -40-35-30-25-20-15193019401950Record: -35.6 C (-32.1 F) in 1925
The coldest night of the year at Old Town, 1921 to 1956. The record is -35.6 C (-32.1 F) in 1925, marked on the chart; the median year is -26.7 C (-16.1 F).
Coldest night (TNn) at Old Town by year
YearColdest night (TNn)
1921-24.4 C (-11.9 F)
1922-31.1 C (-24.0 F)
1923-33.3 C (-27.9 F)
1924-30.0 C (-22.0 F)
1925-35.6 C (-32.1 F)
1926-26.7 C (-16.1 F)
1927-25.0 C (-13.0 F)
1928-24.4 C (-11.9 F)
1929-25.6 C (-14.1 F)
1930-28.3 C (-18.9 F)
1931-28.9 C (-20.0 F)
1932-23.9 C (-11.0 F)
1933-33.9 C (-29.0 F)
1934-32.8 C (-27.0 F)
1935-33.3 C (-27.9 F)
1936-25.6 C (-14.1 F)
1937-23.9 C (-11.0 F)
1938-24.4 C (-11.9 F)
1939-24.4 C (-11.9 F)
1940-27.8 C (-18.0 F)
1941-25.6 C (-14.1 F)
1942-28.3 C (-18.9 F)
1943-30.0 C (-22.0 F)
1944-24.4 C (-11.9 F)
1945-29.4 C (-20.9 F)
1946-25.6 C (-14.1 F)
1947-26.7 C (-16.1 F)
1948-31.1 C (-24.0 F)
1949-24.4 C (-11.9 F)
1950-28.3 C (-18.9 F)
1951-28.3 C (-18.9 F)
1952-25.0 C (-13.0 F)
1953-18.9 C (-2.0 F)
1954-26.7 C (-16.1 F)
1955-32.2 C (-26.0 F)
1956-22.2 C (-8.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Old Town by year The wettest day of the year at Old Town, 1921 to 1956. The record is 127.8 mm (5.0 in) in 1922, marked on the chart; the median year is 53.1 mm (2.1 in). 255075100125150193019401950Record: 127.8 mm (5.0 in) in 1922
The wettest day of the year at Old Town, 1921 to 1956. The record is 127.8 mm (5.0 in) in 1922, marked on the chart; the median year is 53.1 mm (2.1 in).
Wettest day (Rx1day) at Old Town by year
YearWettest day (Rx1day)
192136.1 mm (1.4 in)
1922127.8 mm (5.0 in)
192356.9 mm (2.2 in)
192436.8 mm (1.4 in)
192541.9 mm (1.6 in)
192661.2 mm (2.4 in)
192758.7 mm (2.3 in)
192833.0 mm (1.3 in)
192950.8 mm (2.0 in)
193033.0 mm (1.3 in)
193156.4 mm (2.2 in)
193272.9 mm (2.9 in)
193344.5 mm (1.8 in)
193490.2 mm (3.6 in)
193552.6 mm (2.1 in)
193642.9 mm (1.7 in)
193768.6 mm (2.7 in)
193832.8 mm (1.3 in)
193973.2 mm (2.9 in)
194086.1 mm (3.4 in)
194134.0 mm (1.3 in)
194274.7 mm (2.9 in)
194368.6 mm (2.7 in)
1944104.1 mm (4.1 in)
194553.6 mm (2.1 in)
194632.8 mm (1.3 in)
194761.2 mm (2.4 in)
194840.4 mm (1.6 in)
194948.8 mm (1.9 in)
195057.4 mm (2.3 in)
195148.0 mm (1.9 in)
195242.7 mm (1.7 in)
195349.8 mm (2.0 in)
1954106.2 mm (4.2 in)
195564.8 mm (2.6 in)
195652.1 mm (2.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Old Town by year The wettest five days of the year at Old Town, 1921 to 1956. The record is 195.9 mm (7.7 in) in 1954, marked on the chart; the median year is 83.9 mm (3.3 in). 050100150200193019401950Record: 195.9 mm (7.7 in) in 1954
The wettest five days of the year at Old Town, 1921 to 1956. The record is 195.9 mm (7.7 in) in 1954, marked on the chart; the median year is 83.9 mm (3.3 in).
Wettest five days (Rx5day) at Old Town by year
YearWettest five days (Rx5day)
192154.5 mm (2.1 in)
1922181.6 mm (7.1 in)
1923102.1 mm (4.0 in)
192447.8 mm (1.9 in)
192587.9 mm (3.5 in)
192694.5 mm (3.7 in)
192790.2 mm (3.6 in)
192875.5 mm (3.0 in)
192951.3 mm (2.0 in)
193076.0 mm (3.0 in)
1931137.7 mm (5.4 in)
1932103.1 mm (4.1 in)
193366.3 mm (2.6 in)
1934103.1 mm (4.1 in)
193578.0 mm (3.1 in)
193679.9 mm (3.1 in)
1937119.7 mm (4.7 in)
193880.8 mm (3.2 in)
193986.9 mm (3.4 in)
1940108.9 mm (4.3 in)
194154.3 mm (2.1 in)
1942136.9 mm (5.4 in)
1943111.5 mm (4.4 in)
1944120.3 mm (4.7 in)
194570.4 mm (2.8 in)
194655.9 mm (2.2 in)
194776.5 mm (3.0 in)
194878.8 mm (3.1 in)
194967.3 mm (2.6 in)
1950116.1 mm (4.6 in)
195169.8 mm (2.7 in)
195294.1 mm (3.7 in)
195398.5 mm (3.9 in)
1954195.9 mm (7.7 in)
195574.5 mm (2.9 in)
195653.1 mm (2.1 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Old Town by year The longest dry spell of the year at Old Town, 1921 to 1956. The record is 34 days in 1924, marked on the chart; the median year is 15 days. 10203040193019401950Record: 34 days in 1924
The longest dry spell of the year at Old Town, 1921 to 1956. The record is 34 days in 1924, marked on the chart; the median year is 15 days.
Longest dry spell (CDD) at Old Town by year
YearLongest dry spell (CDD)
192117 days
192214 days
192313 days
192434 days
192512 days
192611 days
192715 days
192819 days
192914 days
193017 days
193112 days
193213 days
193312 days
193419 days
193518 days
193610 days
193712 days
193819 days
193916 days
194017 days
194115 days
194222 days
194314 days
194423 days
194517 days
194617 days
194719 days
194815 days
194914 days
195021 days
195116 days
195215 days
195315 days
195414 days
195518 days
195612 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

34 years with a frost

Across 34 years with a frost, the median last spring frost at Old Town falls on 4 May and the median first autumn frost on 30 September, which leaves a median of 146 days between them.

Fitted over all years, the growing season changes by +0.2 days per decade at this station.

Frost dates and growing season at Old Town
MeasureMedian, all yearsEarliest periodRecent period (1925 to 1955)Recent against earliestFitted trend
Last spring frost4 Mayn/a5 Mayn/a-0.9 days per decade
First autumn frost30 Septembern/a1 Octobern/a-0.7 days per decade
Growing days146 daysn/a146 daysn/a+0.2 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

35 years, 1921 to 1955

A day with at least 53.0 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 144.9 mm (5.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Old Town: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years53.0 mm (2.1 in)
5 years73.0 mm (2.9 in)
10 years87.9 mm (3.5 in)
25 years108.9 mm (4.3 in)
50 years126.2 mm (5.0 in)Longer than the 35 years of record
100 years144.9 mm (5.7 in)Longer than the 35 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, 35 years of values from 1921 to 1955.

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: 127.8 mm (5.0 in) in 1922; 106.2 mm (4.2 in) in 1954; 104.1 mm (4.1 in) in 1944.

Download the Data

  • Data for Old Town standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Old Town 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).