Daily records
Page built 2026-10-15
Data as of 2026-10-14
Search
Built 2026-10-15 (15 October 2026)

Jamestown Wwtp Weather Records (USC00154208)

Record envelope, standing records and threshold days for Jamestown Wwtp (USC00154208), Kentucky, United States, with 56 years of record.

Key Facts for Jamestown Wwtp

  • Jamestown Wwtp (USC00154208) is a weather station in Kentucky, United States at 37.01 latitude and -85.06 longitude, 271 m (890 ft) above sea level.
  • The station reports from 1971 to 2026, 56 years of record.
  • 1,464 records set at Jamestown Wwtp still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Jamestown Wwtp set a daily record high minimum temperature of 22.2 C (72.0 F) on 17 August 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Kentucky, United States, 37.01 latitude, -85.06 longitude.
  • Elevation: 271 m (890 ft).
  • Period of record: 1971 to 2026, 56 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

12 days at or beyond a record
Daily record high and record low at Jamestown Wwtp, with 2026 drawn through them The band shows the record high and record low for each calendar day at Jamestown Wwtp. The lines show the 2026 daily maximum and minimum. 12 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 Jamestown Wwtp. The lines show the 2026 daily maximum and minimum. 12 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Jamestown Wwtp, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan24.4 C (75.9 F)-30.0 C (-22.0 F)19.4 C (66.9 F)-17.2 C (1.0 F)
Feb26.7 C (80.1 F)-28.3 C (-18.9 F)22.8 C (73.0 F)-17.2 C (1.0 F)
Mar31.7 C (89.1 F)-18.3 C (-0.9 F)30.6 C (87.1 F)-4.4 C (24.1 F)
Apr32.2 C (90.0 F)-8.9 C (16.0 F)28.9 C (84.0 F)0.0 C (32.0 F)
May32.8 C (91.0 F)-2.2 C (28.0 F)31.1 C (88.0 F)-0.6 C (30.9 F)
Jun39.4 C (102.9 F)4.4 C (39.9 F)n/an/a
Jul39.4 C (102.9 F)8.9 C (48.0 F)34.4 C (93.9 F)14.4 C (57.9 F)
Aug38.3 C (100.9 F)6.1 C (43.0 F)33.3 C (91.9 F)12.8 C (55.0 F)
Sep36.1 C (97.0 F)1.1 C (34.0 F)n/an/a
Oct34.4 C (93.9 F)-5.6 C (21.9 F)n/an/a
Nov30.0 C (86.0 F)-13.9 C (7.0 F)n/an/a
Dec26.1 C (79.0 F)-25.6 C (-14.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Jamestown Wwtp by the year they were set 1,464 records at Jamestown Wwtp still stand. 1983 holds the most, with 55. 02040601971: 131972: 321973: 221974: 391975: 241976: 371977: 401978: 221979: 401980: 521981: 301982: 351983: 551984: 391985: 551986: 481987: 241988: 411989: 411990: 111991: 91992: 101993: 211994: 161995: 141996: 161997: 101998: 321999: 222000: 292001: 272002: 252003: 102004: 242005: 192006: 332007: 362008: 272009: 192010: 172011: 212012: 182013: 292014: 352015: 382016: 152017: 212018: 362019: 152020: 202021: 82022: 282023: 182024: 192025: 132026: 141971197719831989199520012007201320192025
1,464 records at Jamestown Wwtp still stand. 1983 holds the most, with 55.
Standing records at Jamestown Wwtp by the year they were set
Year setStanding records
197113
197232
197322
197439
197524
197637
197740
197822
197940
198052
198130
198235
198355
198439
198555
198648
198724
198841
198941
199011
19919
199210
199321
199416
199514
199616
199710
199832
199922
200029
200127
200225
200310
200424
200519
200633
200736
200827
200919
201017
201121
201218
201329
201435
201538
201615
201721
201836
201915
202020
20218
202228
202318
202419
202513
202614

Wettest Day of Each Month

Sep: 208.3 mm (8.2 in)
Record daily precipitation for each month at Jamestown Wwtp The wettest day on record for each calendar month at Jamestown Wwtp. The most was 208.3 mm (8.2 in) on 2 September 1982. 0100200300 Jan: 78.7 mm (3.1 in), 27 January 2009 Jan Feb: 93.2 mm (3.7 in), 5 February 2004 Feb Mar: 93.2 mm (3.7 in), 21 March 1976 Mar Apr: 80.0 mm (3.1 in), 29 April 2014 Apr May: 136.7 mm (5.4 in), 7 May 1984 May Jun: 89.4 mm (3.5 in), 6 June 2003 Jun Jul: 92.7 mm (3.6 in), 6 July 2016 Jul Aug: 124.5 mm (4.9 in), 19 August 1975 Aug Sep: 208.3 mm (8.2 in), 2 September 1982 Sep Oct: 73.7 mm (2.9 in), 7 October 2013 Oct Nov: 96.5 mm (3.8 in), 9 November 1986 Nov Dec: 116.1 mm (4.6 in), 8 December 1978 Dec
The wettest day on record for each calendar month at Jamestown Wwtp. The most was 208.3 mm (8.2 in) on 2 September 1982.
Record daily precipitation for each month at Jamestown Wwtp
MonthRecord daily precipitation (mm)Date
Jan78.7 mm (3.1 in)27 January 2009
Feb93.2 mm (3.7 in)5 February 2004
Mar93.2 mm (3.7 in)21 March 1976
Apr80.0 mm (3.1 in)29 April 2014
May136.7 mm (5.4 in)7 May 1984
Jun89.4 mm (3.5 in)6 June 2003
Jul92.7 mm (3.6 in)6 July 2016
Aug124.5 mm (4.9 in)19 August 1975
Sep208.3 mm (8.2 in)2 September 1982
Oct73.7 mm (2.9 in)7 October 2013
Nov96.5 mm (3.8 in)9 November 1986
Dec116.1 mm (4.6 in)8 December 1978

Period of Record Coverage

1971 to 2026
Days with data per year at Jamestown Wwtp 56 years of record at Jamestown Wwtp, 1971 to 2026. 14 years have data for under 90 percent of days and are left out of rankings: 1971, 1978, 1990, 1991, 1993, 1995, 1996, 1997 and others. 1971: 106 of 365 days1972: 365 of 366 days1973: 360 of 365 days1974: 333 of 365 days1975: 364 of 365 days1976: 365 of 366 days1977: 365 of 365 days1978: 225 of 365 days1979: 363 of 365 days1980: 365 of 366 days1981: 360 of 365 days1982: 363 of 365 days1983: 362 of 365 days1984: 365 of 366 days1985: 363 of 365 days1986: 362 of 365 days1987: 359 of 365 days1988: 333 of 366 days1989: 363 of 365 days1990: 156 of 365 days1991: 56 of 365 days1992: 364 of 366 days1993: 291 of 365 days1994: 329 of 365 days1995: 216 of 365 days1996: 246 of 366 days1997: 189 of 365 days1998: 340 of 365 days1999: 362 of 365 days2000: 359 of 366 days2001: 357 of 365 days2002: 326 of 365 days2003: 333 of 365 days2004: 366 of 366 days2005: 305 of 365 days2006: 361 of 365 days2007: 245 of 365 days2008: 365 of 366 days2009: 304 of 365 days2010: 352 of 365 days2011: 321 of 365 days2012: 354 of 366 days2013: 365 of 365 days2014: 348 of 365 days2015: 364 of 365 days2016: 354 of 366 days2017: 357 of 365 days2018: 365 of 365 days2019: 364 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 362 of 365 days2026: 213 of 365 days19801990200020102020
56 years of record at Jamestown Wwtp, 1971 to 2026. 14 years have data for under 90 percent of days and are left out of rankings: 1971, 1978, 1990, 1991, 1993, 1995, 1996, 1997 and others.
Days with data per year at Jamestown Wwtp
YearDays with dataShare of yearComplete
197110629%No
1972365100%Yes
197336099%Yes
197433391%Yes
1975364100%Yes
1976365100%Yes
1977365100%Yes
197822562%No
197936399%Yes
1980365100%Yes
198136099%Yes
198236399%Yes
198336299%Yes
1984365100%Yes
198536399%Yes
198636299%Yes
198735998%Yes
198833391%Yes
198936399%Yes
199015643%No
19915615%No
199236499%Yes
199329180%No
199432990%Yes
199521659%No
199624667%No
199718952%No
199834093%Yes
199936299%Yes
200035998%Yes
200135798%Yes
200232689%No
200333391%Yes
2004366100%Yes
200530584%No
200636199%Yes
200724567%No
2008365100%Yes
200930483%No
201035296%Yes
201132188%No
201235497%Yes
2013365100%Yes
201434895%Yes
2015364100%Yes
201635497%Yes
201735798%Yes
2018365100%Yes
2019364100%Yes
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
202536299%Yes
202621358%No

Latest Records

20
Latest records at Jamestown Wwtp
DateStationRecordValueBeat old record byOld record stoodSignificance
17 August 2026Jamestown Wwtp, USdaily high min (Provisional)22.2 C (72.0 F)0.5 C (0.9 F)39 years17 of 100 (Routine)
15 August 2026Jamestown Wwtp, USdaily high min (Tie)22.2 C (72.0 F)tie40 years4 of 100 (Routine)
28 July 2026Jamestown Wwtp, USdaily high min (Tie)22.2 C (72.0 F)tie31 years3 of 100 (Routine)
21 July 2026Jamestown Wwtp, USdaily high min (Tie)22.2 C (72.0 F)tie52 years5 of 100 (Routine)
20 July 2026Jamestown Wwtp, USdaily rain50.3 mm (2.0 in)21.1 mm (0.8 in)13 years24 of 100 (Routine)
2 July 2026Jamestown Wwtp, USdaily high min (Tie)21.1 C (70.0 F)tie40 years4 of 100 (Routine)
19 May 2026Jamestown Wwtp, USdaily high min (Tie)17.8 C (64.0 F)tie39 years4 of 100 (Routine)
19 May 2026Jamestown Wwtp, USdaily high max (Tie)31.1 C (88.0 F)tie29 years3 of 100 (Routine)
6 May 2026Jamestown Wwtp, USdaily rain32.5 mm (1.3 in)8.4 mm (0.33 in)12 years13 of 100 (Routine)
15 April 2026Jamestown Wwtp, USdaily high max (Tie)28.9 C (84.0 F)tie24 years3 of 100 (Routine)
13 April 2026Jamestown Wwtp, USdaily high max28.9 C (84.0 F)0.6 C (1.1 F)48 years19 of 100 (Routine)
4 April 2026Jamestown Wwtp, USdaily high max (Tie)28.3 C (82.9 F)tie52 years5 of 100 (Routine)
3 April 2026Jamestown Wwtp, USdaily high min (Tie)16.1 C (61.0 F)tie37 years4 of 100 (Routine)
3 April 2026Jamestown Wwtp, USdaily high max (Tie)28.9 C (84.0 F)tie13 years2 of 100 (Routine)
27 March 2026Jamestown Wwtp, USdaily high min16.7 C (62.1 F)2.3 C (4.1 F)19 years13 of 100 (Routine)
27 March 2026Jamestown Wwtp, USdaily high max28.3 C (82.9 F)0.5 C (0.9 F)19 years10 of 100 (Routine)
23 March 2026Jamestown Wwtp, USdaily high max30.6 C (87.1 F)3.4 C (6.1 F)13 years13 of 100 (Routine)
18 March 2026Jamestown Wwtp, USdaily low max1.7 C (35.1 F)0.5 C (0.9 F)52 years20 of 100 (Routine)
17 March 2026Jamestown Wwtp, USdaily low max2.2 C (36.0 F)1.1 C (2.0 F)37 years17 of 100 (Routine)
11 March 2026Jamestown Wwtp, USdaily high min14.4 C (57.9 F)1.1 C (2.0 F)52 years21 of 100 (Routine)

Climate Trend

31 complete years, 1972 to 2025
Annual mean temperature at Jamestown Wwtp as warming stripes, 1972 to 2025 One stripe for each of 31 complete years at Jamestown Wwtp, 1972 to 2025. Blue stripes are years cooler than the station's own mean of 13.1 C (55.6 F); red stripes are warmer. The coolest year was 2014, at 11.6 C (52.9 F), and the warmest was 1986, at 14.4 C (57.9 F). The strongest colour marks a difference of 1.6 C (2.9 F). 1972: 13.0 C, -0.1 C from the station mean1973: 13.7 C, +0.6 C from the station mean1975: 13.7 C, +0.6 C from the station mean1976: 12.2 C, -0.9 C from the station mean1977: 12.9 C, -0.2 C from the station mean1979: 12.4 C, -0.7 C from the station mean1980: 13.2 C, +0.1 C from the station mean1981: 12.9 C, -0.3 C from the station mean1982: 13.6 C, +0.5 C from the station mean1983: 13.3 C, +0.2 C from the station mean1984: 13.7 C, +0.5 C from the station mean1985: 13.6 C, +0.5 C from the station mean1986: 14.4 C, +1.3 C from the station mean1987: 14.2 C, +1.1 C from the station mean1989: 13.0 C, -0.1 C from the station mean2008: 11.9 C, -1.2 C from the station mean2010: 12.2 C, -1.0 C from the station mean2011: 12.4 C, -0.8 C from the station mean2012: 13.5 C, +0.3 C from the station mean2013: 11.7 C, -1.4 C from the station mean2014: 11.6 C, -1.5 C from the station mean2015: 12.8 C, -0.4 C from the station mean2017: 13.8 C, +0.7 C from the station mean2018: 13.6 C, +0.5 C from the station mean2019: 13.9 C, +0.8 C from the station mean2020: 13.4 C, +0.3 C from the station mean2021: 13.1 C, -0.1 C from the station mean2022: 12.5 C, -0.6 C from the station mean2023: 13.7 C, +0.5 C from the station mean2024: 13.9 C, +0.7 C from the station mean2025: 13.4 C, +0.2 C from the station mean197219751980198519901995200020052010201520202025
One stripe for each of 31 complete years at Jamestown Wwtp, 1972 to 2025. Blue stripes are years cooler than the station's own mean of 13.1 C (55.6 F); red stripes are warmer. The coolest year was 2014, at 11.6 C (52.9 F), and the warmest was 1986, at 14.4 C (57.9 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Jamestown Wwtp as warming stripes, 1972 to 2025
YearAnnual mean temperatureDifference from the station mean
197213.0 C-0.13 C
197313.7 C+0.56 C
197513.7 C+0.56 C
197612.2 C-0.94 C
197712.9 C-0.19 C
197912.4 C-0.70 C
198013.2 C+0.08 C
198112.9 C-0.27 C
198213.6 C+0.47 C
198313.3 C+0.18 C
198413.7 C+0.55 C
198513.6 C+0.48 C
198614.4 C+1.27 C
198714.2 C+1.06 C
198913.0 C-0.11 C
200811.9 C-1.24 C
201012.2 C-0.95 C
201112.4 C-0.75 C
201213.5 C+0.34 C
201311.7 C-1.44 C
201411.6 C-1.52 C
201512.8 C-0.37 C
201713.8 C+0.72 C
201813.6 C+0.48 C
201913.9 C+0.79 C
202013.4 C+0.32 C
202113.1 C-0.06 C
202212.5 C-0.64 C
202313.7 C+0.53 C
202413.9 C+0.73 C
202513.4 C+0.23 C

The fitted trend in annual mean temperature here over 1972 to 2025 is -0.04 C (-0.18 to 0.10) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.2) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Jamestown Wwtp
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.04 C (-0.18 to 0.10) per decade-0.1 F (-0.3 to 0.2) per decade1972 to 202531Not clearly different from zero
Mean daily maximum0.12 C (0.00 to 0.25) per decade0.22 F (-0.01 to 0.45) per decade1972 to 202531Not clearly different from zero
Mean daily minimum-0.20 C (-0.39 to -0.01) per decade-0.37 F (-0.71 to -0.02) per decade1972 to 202531Fall

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

1971 to 2026
Yearly extremes at Jamestown Wwtp: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)39.4 C (102.9 F)198034.4 C (93.9 F)56
Coldest night (TNn)-30.0 C (-22.0 F)1994-16.6 C (2.0 F)56
Wettest day (Rx1day)208.3 mm (8.2 in)198273.7 mm (2.9 in)56
Wettest five days (Rx5day)255.8 mm (10.1 in)1978123.2 mm (4.9 in)56
Longest dry spell (CDD)31 days202416 days56

Hottest day (TXx)

Hottest day (TXx) at Jamestown Wwtp by year The hottest day of the year at Jamestown Wwtp, 1971 to 2026. The record is 39.4 C (102.9 F) in 1980, marked on the chart; the median year is 34.4 C (93.9 F). 202530354019801990200020102020Record: 39.4 C (102.9 F) in 1980
The hottest day of the year at Jamestown Wwtp, 1971 to 2026. The record is 39.4 C (102.9 F) in 1980, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at Jamestown Wwtp by year
YearHottest day (TXx)
197135.0 C (95.0 F)
197233.3 C (91.9 F)
197333.3 C (91.9 F)
197432.8 C (91.0 F)
197535.0 C (95.0 F)
197633.3 C (91.9 F)
197734.4 C (93.9 F)
197835.6 C (96.1 F)
197933.3 C (91.9 F)
198039.4 C (102.9 F)
198133.9 C (93.0 F)
198233.3 C (91.9 F)
198338.3 C (100.9 F)
198434.4 C (93.9 F)
198535.0 C (95.0 F)
198635.6 C (96.1 F)
198735.6 C (96.1 F)
198838.9 C (102.0 F)
198933.3 C (91.9 F)
199033.3 C (91.9 F)
199123.9 C (75.0 F)
199232.8 C (91.0 F)
199336.1 C (97.0 F)
199435.0 C (95.0 F)
199538.3 C (100.9 F)
199633.9 C (93.0 F)
199735.6 C (96.1 F)
199835.6 C (96.1 F)
199937.8 C (100.0 F)
200033.9 C (93.0 F)
200133.9 C (93.0 F)
200236.1 C (97.0 F)
200333.3 C (91.9 F)
200433.3 C (91.9 F)
200535.6 C (96.1 F)
200636.1 C (97.0 F)
200738.3 C (100.9 F)
200835.0 C (95.0 F)
200932.2 C (90.0 F)
201035.0 C (95.0 F)
201136.1 C (97.0 F)
201239.4 C (102.9 F)
201332.8 C (91.0 F)
201433.3 C (91.9 F)
201532.8 C (91.0 F)
201635.0 C (95.0 F)
201732.8 C (91.0 F)
201834.4 C (93.9 F)
201935.0 C (95.0 F)
202033.9 C (93.0 F)
202133.9 C (93.0 F)
202233.9 C (93.0 F)
202334.4 C (93.9 F)
202435.6 C (96.1 F)
202534.4 C (93.9 F)
202634.4 C (93.9 F)

Coldest night (TNn)

Coldest night (TNn) at Jamestown Wwtp by year The coldest night of the year at Jamestown Wwtp, 1971 to 2026. The record is -30.0 C (-22.0 F) in 1994, marked on the chart; the median year is -16.6 C (2.0 F). -30-20-10019801990200020102020Record: -30.0 C (-22.0 F) in 1994
The coldest night of the year at Jamestown Wwtp, 1971 to 2026. The record is -30.0 C (-22.0 F) in 1994, marked on the chart; the median year is -16.6 C (2.0 F).
Coldest night (TNn) at Jamestown Wwtp by year
YearColdest night (TNn)
1971-10.6 C (12.9 F)
1972-21.7 C (-7.1 F)
1973-15.6 C (3.9 F)
1974-12.2 C (10.0 F)
1975-12.8 C (9.0 F)
1976-20.0 C (-4.0 F)
1977-25.6 C (-14.1 F)
1978-20.6 C (-5.1 F)
1979-18.9 C (-2.0 F)
1980-18.3 C (-0.9 F)
1981-20.6 C (-5.1 F)
1982-26.1 C (-15.0 F)
1983-22.8 C (-9.0 F)
1984-24.4 C (-11.9 F)
1985-28.3 C (-18.9 F)
1986-18.9 C (-2.0 F)
1987-16.1 C (3.0 F)
1988-17.2 C (1.0 F)
1989-25.6 C (-14.1 F)
1990-9.4 C (15.1 F)
1991-10.6 C (12.9 F)
1992-15.6 C (3.9 F)
1993-14.4 C (6.1 F)
1994-30.0 C (-22.0 F)
1995-15.6 C (3.9 F)
1996-22.2 C (-8.0 F)
1997-13.3 C (8.1 F)
1998-12.8 C (9.0 F)
1999-15.6 C (3.9 F)
2000-16.1 C (3.0 F)
2001-14.4 C (6.1 F)
2002-14.4 C (6.1 F)
2003-20.0 C (-4.0 F)
2004-16.1 C (3.0 F)
2005-15.0 C (5.0 F)
2006-14.4 C (6.1 F)
2007-14.4 C (6.1 F)
2008-15.6 C (3.9 F)
2009-18.9 C (-2.0 F)
2010-17.8 C (0.0 F)
2011-17.8 C (0.0 F)
2012-11.1 C (12.0 F)
2013-11.1 C (12.0 F)
2014-20.6 C (-5.1 F)
2015-28.3 C (-18.9 F)
2016-17.8 C (0.0 F)
2017-16.1 C (3.0 F)
2018-22.8 C (-9.0 F)
2019-13.3 C (8.1 F)
2020-12.8 C (9.0 F)
2021-14.4 C (6.1 F)
2022-21.7 C (-7.1 F)
2023-10.0 C (14.0 F)
2024-23.3 C (-9.9 F)
2025-18.9 C (-2.0 F)
2026-17.2 C (1.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Jamestown Wwtp by year The wettest day of the year at Jamestown Wwtp, 1971 to 2026. The record is 208.3 mm (8.2 in) in 1982, marked on the chart; the median year is 73.7 mm (2.9 in). 05010015020025019801990200020102020Record: 208.3 mm (8.2 in) in 1982
The wettest day of the year at Jamestown Wwtp, 1971 to 2026. The record is 208.3 mm (8.2 in) in 1982, marked on the chart; the median year is 73.7 mm (2.9 in).
Wettest day (Rx1day) at Jamestown Wwtp by year
YearWettest day (Rx1day)
197150.8 mm (2.0 in)
197279.8 mm (3.1 in)
197385.1 mm (3.4 in)
197476.2 mm (3.0 in)
1975124.5 mm (4.9 in)
197693.2 mm (3.7 in)
197777.2 mm (3.0 in)
1978116.1 mm (4.6 in)
197977.5 mm (3.1 in)
198041.9 mm (1.6 in)
198181.3 mm (3.2 in)
1982208.3 mm (8.2 in)
198359.4 mm (2.3 in)
1984136.7 mm (5.4 in)
198545.7 mm (1.8 in)
198696.5 mm (3.8 in)
198776.2 mm (3.0 in)
198871.1 mm (2.8 in)
198973.7 mm (2.9 in)
199054.6 mm (2.1 in)
199177.2 mm (3.0 in)
199269.9 mm (2.8 in)
199363.5 mm (2.5 in)
199463.5 mm (2.5 in)
199568.6 mm (2.7 in)
199650.8 mm (2.0 in)
199763.5 mm (2.5 in)
199873.7 mm (2.9 in)
199950.8 mm (2.0 in)
200066.0 mm (2.6 in)
200179.2 mm (3.1 in)
2002109.7 mm (4.3 in)
200389.4 mm (3.5 in)
200493.2 mm (3.7 in)
200560.2 mm (2.4 in)
200690.7 mm (3.6 in)
200784.3 mm (3.3 in)
200859.2 mm (2.3 in)
200978.7 mm (3.1 in)
2010132.1 mm (5.2 in)
201167.3 mm (2.6 in)
201266.0 mm (2.6 in)
201373.7 mm (2.9 in)
201480.0 mm (3.1 in)
201578.7 mm (3.1 in)
201692.7 mm (3.6 in)
201767.3 mm (2.6 in)
201853.8 mm (2.1 in)
201964.8 mm (2.6 in)
202058.4 mm (2.3 in)
202188.1 mm (3.5 in)
202250.8 mm (2.0 in)
202357.4 mm (2.3 in)
202453.3 mm (2.1 in)
202582.6 mm (3.3 in)
202650.3 mm (2.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Jamestown Wwtp by year The wettest five days of the year at Jamestown Wwtp, 1971 to 2026. The record is 255.8 mm (10.1 in) in 1978, marked on the chart; the median year is 123.2 mm (4.9 in). 5010015020025030019801990200020102020Record: 255.8 mm (10.1 in) in 1978
The wettest five days of the year at Jamestown Wwtp, 1971 to 2026. The record is 255.8 mm (10.1 in) in 1978, marked on the chart; the median year is 123.2 mm (4.9 in).
Wettest five days (Rx5day) at Jamestown Wwtp by year
YearWettest five days (Rx5day)
197182.3 mm (3.2 in)
1972126.0 mm (5.0 in)
1973117.6 mm (4.6 in)
1974141.5 mm (5.6 in)
1975204.5 mm (8.1 in)
1976115.4 mm (4.5 in)
197797.5 mm (3.8 in)
1978255.8 mm (10.1 in)
197999.8 mm (3.9 in)
198081.2 mm (3.2 in)
1981121.2 mm (4.8 in)
1982238.8 mm (9.4 in)
1983130.1 mm (5.1 in)
1984199.5 mm (7.9 in)
198589.6 mm (3.5 in)
1986183.9 mm (7.2 in)
1987109.2 mm (4.3 in)
1988125.3 mm (4.9 in)
1989128.3 mm (5.1 in)
199082.1 mm (3.2 in)
1991144.3 mm (5.7 in)
199288.3 mm (3.5 in)
199368.1 mm (2.7 in)
1994139.5 mm (5.5 in)
1995100.3 mm (3.9 in)
199697.1 mm (3.8 in)
199764.8 mm (2.6 in)
1998107.7 mm (4.2 in)
1999103.0 mm (4.1 in)
2000140.0 mm (5.5 in)
200186.7 mm (3.4 in)
2002111.7 mm (4.4 in)
2003125.2 mm (4.9 in)
2004128.3 mm (5.1 in)
200592.7 mm (3.6 in)
2006135.7 mm (5.3 in)
200793.7 mm (3.7 in)
2008109.0 mm (4.3 in)
2009132.3 mm (5.2 in)
2010240.1 mm (9.5 in)
2011100.8 mm (4.0 in)
2012126.9 mm (5.0 in)
2013146.6 mm (5.8 in)
2014129.5 mm (5.1 in)
2015130.8 mm (5.1 in)
2016209.5 mm (8.2 in)
2017103.4 mm (4.1 in)
2018125.5 mm (4.9 in)
2019159.5 mm (6.3 in)
202096.6 mm (3.8 in)
2021150.3 mm (5.9 in)
202294.8 mm (3.7 in)
202378.2 mm (3.1 in)
2024131.3 mm (5.2 in)
2025166.7 mm (6.6 in)
202673.4 mm (2.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Jamestown Wwtp by year The longest dry spell of the year at Jamestown Wwtp, 1971 to 2026. The record is 31 days in 2024, marked on the chart; the median year is 16 days. 01020304019801990200020102020Record: 31 days in 2024
The longest dry spell of the year at Jamestown Wwtp, 1971 to 2026. The record is 31 days in 2024, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Jamestown Wwtp by year
YearLongest dry spell (CDD)
197121 days
197221 days
197317 days
197415 days
197511 days
197614 days
197716 days
197815 days
197913 days
198014 days
198113 days
198212 days
198319 days
198418 days
198519 days
198618 days
198719 days
198814 days
198911 days
199013 days
199120 days
199213 days
199324 days
199422 days
199521 days
199616 days
199720 days
199813 days
199921 days
200016 days
200115 days
200219 days
200313 days
200416 days
200515 days
200611 days
200725 days
200815 days
200915 days
201022 days
201112 days
201220 days
201311 days
201420 days
201520 days
201620 days
201715 days
20189 days
201926 days
202011 days
202112 days
202217 days
202313 days
202431 days
202515 days
202617 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

31 years with a frost

Across 31 years with a frost, the median last spring frost at Jamestown Wwtp falls on 16 April and the median first autumn frost on 21 October, which leaves a median of 190 days between them.

Fitted over all years, the growing season changes by -4.3 days per decade at this station.

Frost dates and growing season at Jamestown Wwtp
MeasureMedian, all yearsEarliest periodRecent period (1973 to 2025)Recent against earliestFitted trend
Last spring frost16 Apriln/a17 Apriln/a+3.3 days per decade
First autumn frost21 Octobern/a22 Octobern/a-1.1 days per decade
Growing days190 daysn/a190 daysn/a-4.3 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

43 years, 1972 to 2025

A day with at least 73.3 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 185.5 mm (7.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Jamestown Wwtp: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years73.3 mm (2.9 in)
5 years95.9 mm (3.8 in)
10 years113.4 mm (4.5 in)
25 years139.0 mm (5.5 in)
50 years161.0 mm (6.3 in)Longer than the 43 years of record
100 years185.5 mm (7.3 in)Longer than the 43 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, 43 years of values from 1972 to 2025.

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: 208.3 mm (8.2 in) in 1982; 136.7 mm (5.4 in) in 1984; 132.1 mm (5.2 in) in 2010.

Climate Twins

2010 to 2025 against 1961 to 1990

Over 2010 to 2025, Jamestown Wwtp had a mean temperature of 13.0 C (55.4 F) and 1,561.4 mm (61.5 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Rockwood 2 (United States, 134 km away), Cookeville (United States, 107 km away) and Andrews (United States, 229 km away).

Climate twins of Jamestown Wwtp: stations whose 1961 to 1990 climate is closest to its 2010 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
Rockwood 2United States134 km (83 mi)13.3 C (55.9 F)1,455.6 mm (57.3 in)0.79
CookevilleUnited States107 km (66 mi)13.5 C (56.3 F)1,423.4 mm (56.0 in)0.91
AndrewsUnited States229 km (142 mi)12.6 C (54.6 F)1,558.3 mm (61.4 in)0.91

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 Jamestown Wwtp standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Jamestown Wwtp 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-14).