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Dwight Wwtp Weather Records (USC00112500)

Record envelope, standing records and threshold days for Dwight Wwtp (USC00112500), Illinois, United States, with 37 years of record.

Key Facts for Dwight Wwtp

  • Dwight Wwtp (USC00112500) is a weather station in Illinois, United States at 41.11 latitude and -88.41 longitude, 191 m (625 ft) above sea level.
  • The station reports from 1990 to 2026, 37 years of record.
  • 1,464 records set at Dwight Wwtp still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Dwight Wwtp set a daily record high minimum temperature of 18.9 C (66.0 F) on 17 September 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Illinois, United States, 41.11 latitude, -88.41 longitude.
  • Elevation: 191 m (625 ft).
  • Period of record: 1990 to 2026, 37 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

17 days at or beyond a record
Daily record high and record low at Dwight Wwtp, with 2026 drawn through them The band shows the record high and record low for each calendar day at Dwight Wwtp. The lines show the 2026 daily maximum and minimum. 17 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 Dwight Wwtp. The lines show the 2026 daily maximum and minimum. 17 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Dwight Wwtp, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan18.3 C (64.9 F)-30.0 C (-22.0 F)16.1 C (61.0 F)-22.8 C (-9.0 F)
Feb22.8 C (73.0 F)-28.3 C (-18.9 F)19.4 C (66.9 F)-18.3 C (-0.9 F)
Mar28.9 C (84.0 F)-20.6 C (-5.1 F)26.7 C (80.1 F)-11.7 C (10.9 F)
Apr31.7 C (89.1 F)-10.0 C (14.0 F)27.8 C (82.0 F)-1.1 C (30.0 F)
May35.6 C (96.1 F)-4.4 C (24.1 F)30.6 C (87.1 F)0.0 C (32.0 F)
Jun37.2 C (99.0 F)-1.1 C (30.0 F)32.8 C (91.0 F)8.3 C (46.9 F)
Jul39.4 C (102.9 F)6.1 C (43.0 F)33.3 C (91.9 F)10.0 C (50.0 F)
Aug37.8 C (100.0 F)5.0 C (41.0 F)31.1 C (88.0 F)5.6 C (42.1 F)
Sep37.8 C (100.0 F)-2.8 C (27.0 F)30.0 C (86.0 F)7.8 C (46.0 F)
Oct31.7 C (89.1 F)-6.7 C (19.9 F)27.2 C (81.0 F)6.1 C (43.0 F)
Nov26.7 C (80.1 F)-15.6 C (3.9 F)n/an/a
Dec20.6 C (69.1 F)-25.0 C (-13.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Dwight Wwtp by the year they were set 1,464 records at Dwight Wwtp still stand. 1991 holds the most, with 72. 0204060801990: 21991: 721992: 571993: 331994: 431995: 531996: 451997: 461998: 491999: 522000: 622001: 442002: 452003: 282004: 292005: 302006: 402007: 242008: 382009: 272010: 352011: 242012: 652013: 322014: 582015: 442016: 202017: 572018: 412019: 342020: 332021: 322022: 302023: 372024: 442025: 322026: 271990199419982002200620102014201820222026
1,464 records at Dwight Wwtp still stand. 1991 holds the most, with 72.
Standing records at Dwight Wwtp by the year they were set
Year setStanding records
19902
199172
199257
199333
199443
199553
199645
199746
199849
199952
200062
200144
200245
200328
200429
200530
200640
200724
200838
200927
201035
201124
201265
201332
201458
201544
201620
201757
201841
201934
202033
202132
202230
202337
202444
202532
202627

Wettest Day of Each Month

Aug: 154.9 mm (6.1 in)
Record daily precipitation for each month at Dwight Wwtp The wettest day on record for each calendar month at Dwight Wwtp. The most was 154.9 mm (6.1 in) on 22 August 2014. 050100150200 Jan: 65.5 mm (2.6 in), 8 January 2008 Jan Feb: 42.2 mm (1.7 in), 25 February 2001 Feb Mar: 55.9 mm (2.2 in), 8 March 2009 Mar Apr: 68.6 mm (2.7 in), 18 April 2013 Apr May: 78.2 mm (3.1 in), 15 May 2020 May Jun: 120.7 mm (4.8 in), 11 June 1998 Jun Jul: 114.6 mm (4.5 in), 18 July 2016 Jul Aug: 154.9 mm (6.1 in), 22 August 2014 Aug Sep: 86.4 mm (3.4 in), 28 September 2019 Sep Oct: 91.4 mm (3.6 in), 25 October 2021 Oct Nov: 42.9 mm (1.7 in), 5 November 2024 Nov Dec: 43.2 mm (1.7 in), 15 December 2011 Dec
The wettest day on record for each calendar month at Dwight Wwtp. The most was 154.9 mm (6.1 in) on 22 August 2014.
Record daily precipitation for each month at Dwight Wwtp
MonthRecord daily precipitation (mm)Date
Jan65.5 mm (2.6 in)8 January 2008
Feb42.2 mm (1.7 in)25 February 2001
Mar55.9 mm (2.2 in)8 March 2009
Apr68.6 mm (2.7 in)18 April 2013
May78.2 mm (3.1 in)15 May 2020
Jun120.7 mm (4.8 in)11 June 1998
Jul114.6 mm (4.5 in)18 July 2016
Aug154.9 mm (6.1 in)22 August 2014
Sep86.4 mm (3.4 in)28 September 2019
Oct91.4 mm (3.6 in)25 October 2021
Nov42.9 mm (1.7 in)5 November 2024
Dec43.2 mm (1.7 in)15 December 2011

Period of Record Coverage

1990 to 2026
Days with data per year at Dwight Wwtp 37 years of record at Dwight Wwtp, 1990 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1990, 2007, 2026. 1990: 31 of 365 days1991: 364 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 365 of 365 days1995: 365 of 365 days1996: 365 of 366 days1997: 364 of 365 days1998: 359 of 365 days1999: 363 of 365 days2000: 364 of 366 days2001: 365 of 365 days2002: 364 of 365 days2003: 362 of 365 days2004: 366 of 366 days2005: 334 of 365 days2006: 364 of 365 days2007: 297 of 365 days2008: 365 of 366 days2009: 359 of 365 days2010: 364 of 365 days2011: 364 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 360 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 361 of 365 days2018: 364 of 365 days2019: 361 of 365 days2020: 356 of 366 days2021: 364 of 365 days2022: 364 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 363 of 365 days2026: 248 of 365 days19901995200020052010201520202025
37 years of record at Dwight Wwtp, 1990 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1990, 2007, 2026.
Days with data per year at Dwight Wwtp
YearDays with dataShare of yearComplete
1990318%No
1991364100%Yes
1992366100%Yes
1993365100%Yes
1994365100%Yes
1995365100%Yes
1996365100%Yes
1997364100%Yes
199835998%Yes
199936399%Yes
200036499%Yes
2001365100%Yes
2002364100%Yes
200336299%Yes
2004366100%Yes
200533492%Yes
2006364100%Yes
200729781%No
2008365100%Yes
200935998%Yes
2010364100%Yes
2011364100%Yes
2012366100%Yes
2013365100%Yes
201436099%Yes
2015365100%Yes
2016366100%Yes
201736199%Yes
2018364100%Yes
201936199%Yes
202035697%Yes
2021364100%Yes
2022364100%Yes
2023365100%Yes
2024366100%Yes
202536399%Yes
202624868%No

Latest Records

20
Latest records at Dwight Wwtp
DateStationRecordValueBeat old record byOld record stoodSignificance
17 September 2026Dwight Wwtp, USdaily high min (Provisional)18.9 C (66.0 F)1.1 C (2.0 F)33 years15 of 100 (Routine)
16 September 2026Dwight Wwtp, USdaily rain (Provisional)41.7 mm (1.6 in)22.6 mm (0.9 in)21 years24 of 100 (Routine)
31 August 2026Dwight Wwtp, USdaily high min (Provisional)20.0 C (68.0 F)0.6 C (1.1 F)32 years13 of 100 (Routine)
19 August 2026Dwight Wwtp, USdaily low min (Provisional)5.6 C (42.1 F)5.0 C (9.0 F)12 years20 of 100 (Routine)
10 August 2026Dwight Wwtp, USdaily rain93.0 mm (3.7 in)74.7 mm (2.9 in)24 years50 of 100 (Notable)
23 July 2026Dwight Wwtp, USdaily low min (Tie)10.0 C (50.0 F)tie25 years2 of 100 (Routine)
5 July 2026Dwight Wwtp, USdaily rain31.2 mm (1.2 in)12.1 mm (0.5 in)19 years16 of 100 (Routine)
2 July 2026Dwight Wwtp, USdaily high max32.8 C (91.0 F)0.6 C (1.1 F)35 years14 of 100 (Routine)
2 July 2026Dwight Wwtp, USdaily high min23.3 C (73.9 F)0.5 C (0.9 F)15 years8 of 100 (Routine)
1 July 2026Dwight Wwtp, USdaily high min23.3 C (73.9 F)0.5 C (0.9 F)24 years11 of 100 (Routine)
30 June 2026Dwight Wwtp, USdaily high min23.3 C (73.9 F)0.5 C (0.9 F)20 years10 of 100 (Routine)
25 June 2026Dwight Wwtp, USdaily rain50.8 mm (2.0 in)17.3 mm (0.7 in)4 years15 of 100 (Routine)
22 June 2026Dwight Wwtp, USdaily low max18.3 C (64.9 F)1.1 C (2.0 F)33 years15 of 100 (Routine)
19 June 2026Dwight Wwtp, USdaily low max22.2 C (72.0 F)0.6 C (1.1 F)20 years10 of 100 (Routine)
15 June 2026Dwight Wwtp, USdaily low max (Tie)20.6 C (69.1 F)tie24 years2 of 100 (Routine)
12 June 2026Dwight Wwtp, USdaily rain (Tie)22.1 mm (0.9 in)tie28 years2 of 100 (Routine)
10 June 2026Dwight Wwtp, USdaily high max (Tie)32.8 C (91.0 F)tie24 years2 of 100 (Routine)
5 May 2026Dwight Wwtp, USdaily rain19.6 mm (0.8 in)9.4 mm (0.37 in)35 years20 of 100 (Routine)
2 May 2026Dwight Wwtp, USdaily low min0.0 C (32.0 F)1.1 C (2.0 F)20 years11 of 100 (Routine)
28 April 2026Dwight Wwtp, USdaily rain34.3 mm (1.4 in)0.5 mm (0.02 in)24 years10 of 100 (Routine)

Climate Trend

32 complete years, 1991 to 2025
Annual mean temperature at Dwight Wwtp as warming stripes, 1991 to 2025 One stripe for each of 32 complete years at Dwight Wwtp, 1991 to 2025. Blue stripes are years cooler than the station's own mean of 9.8 C (49.7 F); red stripes are warmer. The coolest year was 2014, at 7.5 C (45.4 F), and the warmest was 1998, at 11.8 C (53.2 F). The strongest colour marks a difference of 2.4 C (4.3 F). 1991: 10.7 C, +0.8 C from the station mean1992: 9.3 C, -0.5 C from the station mean1993: 9.1 C, -0.7 C from the station mean1994: 9.5 C, -0.3 C from the station mean1995: 9.5 C, -0.4 C from the station mean1996: 8.5 C, -1.3 C from the station mean1997: 8.8 C, -1.0 C from the station mean1998: 11.8 C, +1.9 C from the station mean1999: 10.6 C, +0.7 C from the station mean2000: 9.9 C, 0.0 C from the station mean2001: 10.6 C, +0.7 C from the station mean2002: 10.2 C, +0.4 C from the station mean2003: 9.3 C, -0.6 C from the station mean2004: 9.7 C, -0.1 C from the station mean2006: 10.4 C, +0.6 C from the station mean2008: 8.8 C, -1.1 C from the station mean2009: 8.8 C, -1.0 C from the station mean2010: 9.7 C, -0.1 C from the station mean2011: 9.9 C, +0.1 C from the station mean2012: 11.4 C, +1.5 C from the station mean2013: 8.8 C, -1.0 C from the station mean2014: 7.5 C, -2.4 C from the station mean2015: 9.7 C, -0.2 C from the station mean2016: 10.8 C, +1.0 C from the station mean2017: 10.5 C, +0.6 C from the station mean2018: 9.4 C, -0.4 C from the station mean2019: 9.3 C, -0.6 C from the station mean2020: 10.4 C, +0.5 C from the station mean2022: 9.2 C, -0.6 C from the station mean2023: 10.9 C, +1.1 C from the station mean2024: 11.7 C, +1.8 C from the station mean2025: 10.4 C, +0.6 C from the station mean19911995200020052010201520202025
One stripe for each of 32 complete years at Dwight Wwtp, 1991 to 2025. Blue stripes are years cooler than the station's own mean of 9.8 C (49.7 F); red stripes are warmer. The coolest year was 2014, at 7.5 C (45.4 F), and the warmest was 1998, at 11.8 C (53.2 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Dwight Wwtp as warming stripes, 1991 to 2025
YearAnnual mean temperatureDifference from the station mean
199110.7 C+0.84 C
19929.3 C-0.51 C
19939.1 C-0.74 C
19949.5 C-0.33 C
19959.5 C-0.36 C
19968.5 C-1.31 C
19978.8 C-1.03 C
199811.8 C+1.95 C
199910.6 C+0.72 C
20009.9 C+0.05 C
200110.6 C+0.73 C
200210.2 C+0.38 C
20039.3 C-0.56 C
20049.7 C-0.09 C
200610.4 C+0.59 C
20088.8 C-1.07 C
20098.8 C-1.04 C
20109.7 C-0.09 C
20119.9 C+0.07 C
201211.4 C+1.55 C
20138.8 C-1.03 C
20147.5 C-2.37 C
20159.7 C-0.18 C
201610.8 C+0.96 C
201710.5 C+0.62 C
20189.4 C-0.41 C
20199.3 C-0.57 C
202010.4 C+0.52 C
20229.2 C-0.60 C
202310.9 C+1.08 C
202411.7 C+1.82 C
202510.4 C+0.56 C

The fitted trend in annual mean temperature here over 1991 to 2025 is 0.1 C (-0.2 to 0.5) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.3 F (-0.3 to 0.9) per decade. The slope is a straight line fitted to 32 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Dwight Wwtp
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.1 C (-0.2 to 0.5) per decade0.3 F (-0.3 to 0.9) per decade1991 to 202532Not clearly different from zero
Mean daily maximum0.2 C (-0.2 to 0.6) per decade0.4 F (-0.3 to 1.0) per decade1991 to 202532Not clearly different from zero
Mean daily minimum0.1 C (-0.2 to 0.4) per decade0.2 F (-0.4 to 0.8) per decade1991 to 202532Not clearly different from zero

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

1990 to 2026
Yearly extremes at Dwight Wwtp: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)39.4 C (102.9 F)199535.0 C (95.0 F)37
Coldest night (TNn)-30.0 C (-22.0 F)1999-23.3 C (-9.9 F)37
Wettest day (Rx1day)154.9 mm (6.1 in)201461.2 mm (2.4 in)37
Wettest five days (Rx5day)223.8 mm (8.8 in)200893.0 mm (3.7 in)37
Longest dry spell (CDD)35 days201718 days37

Hottest day (TXx)

Hottest day (TXx) at Dwight Wwtp by year The hottest day of the year at Dwight Wwtp, 1990 to 2026. The record is 39.4 C (102.9 F) in 1995, marked on the chart; the median year is 35.0 C (95.0 F). 102030401990200020102020Record: 39.4 C (102.9 F) in 1995
The hottest day of the year at Dwight Wwtp, 1990 to 2026. The record is 39.4 C (102.9 F) in 1995, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Dwight Wwtp by year
YearHottest day (TXx)
199013.9 C (57.0 F)
199137.8 C (100.0 F)
199232.8 C (91.0 F)
199333.3 C (91.9 F)
199437.2 C (99.0 F)
199539.4 C (102.9 F)
199633.9 C (93.0 F)
199735.0 C (95.0 F)
199836.7 C (98.1 F)
199937.8 C (100.0 F)
200037.8 C (100.0 F)
200135.0 C (95.0 F)
200235.6 C (96.1 F)
200335.6 C (96.1 F)
200432.2 C (90.0 F)
200536.7 C (98.1 F)
200635.0 C (95.0 F)
200733.9 C (93.0 F)
200832.8 C (91.0 F)
200933.3 C (91.9 F)
201034.4 C (93.9 F)
201136.1 C (97.0 F)
201237.8 C (100.0 F)
201333.9 C (93.0 F)
201432.2 C (90.0 F)
201533.3 C (91.9 F)
201633.3 C (91.9 F)
201734.4 C (93.9 F)
201835.6 C (96.1 F)
201933.9 C (93.0 F)
202035.0 C (95.0 F)
202133.9 C (93.0 F)
202235.0 C (95.0 F)
202335.6 C (96.1 F)
202436.1 C (97.0 F)
202535.0 C (95.0 F)
202633.3 C (91.9 F)

Coldest night (TNn)

Coldest night (TNn) at Dwight Wwtp by year The coldest night of the year at Dwight Wwtp, 1990 to 2026. The record is -30.0 C (-22.0 F) in 1999, marked on the chart; the median year is -23.3 C (-9.9 F). -30-25-20-151990200020102020Record: -30.0 C (-22.0 F) in 1999
The coldest night of the year at Dwight Wwtp, 1990 to 2026. The record is -30.0 C (-22.0 F) in 1999, marked on the chart; the median year is -23.3 C (-9.9 F).
Coldest night (TNn) at Dwight Wwtp by year
YearColdest night (TNn)
1990-20.6 C (-5.1 F)
1991-19.4 C (-2.9 F)
1992-22.8 C (-9.0 F)
1993-21.7 C (-7.1 F)
1994-28.9 C (-20.0 F)
1995-22.2 C (-8.0 F)
1996-27.8 C (-18.0 F)
1997-23.3 C (-9.9 F)
1998-21.1 C (-6.0 F)
1999-30.0 C (-22.0 F)
2000-25.0 C (-13.0 F)
2001-19.4 C (-2.9 F)
2002-20.6 C (-5.1 F)
2003-23.9 C (-11.0 F)
2004-23.3 C (-9.9 F)
2005-21.7 C (-7.1 F)
2006-21.1 C (-6.0 F)
2007-23.3 C (-9.9 F)
2008-24.4 C (-11.9 F)
2009-30.0 C (-22.0 F)
2010-22.8 C (-9.0 F)
2011-23.3 C (-9.9 F)
2012-17.8 C (0.0 F)
2013-20.6 C (-5.1 F)
2014-28.3 C (-18.9 F)
2015-23.9 C (-11.0 F)
2016-23.3 C (-9.9 F)
2017-24.4 C (-11.9 F)
2018-27.8 C (-18.0 F)
2019-30.0 C (-22.0 F)
2020-21.7 C (-7.1 F)
2021-25.0 C (-13.0 F)
2022-22.8 C (-9.0 F)
2023-17.8 C (0.0 F)
2024-25.6 C (-14.1 F)
2025-22.2 C (-8.0 F)
2026-22.8 C (-9.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Dwight Wwtp by year The wettest day of the year at Dwight Wwtp, 1990 to 2026. The record is 154.9 mm (6.1 in) in 2014, marked on the chart; the median year is 61.2 mm (2.4 in). 0501001502001990200020102020Record: 154.9 mm (6.1 in) in 2014
The wettest day of the year at Dwight Wwtp, 1990 to 2026. The record is 154.9 mm (6.1 in) in 2014, marked on the chart; the median year is 61.2 mm (2.4 in).
Wettest day (Rx1day) at Dwight Wwtp by year
YearWettest day (Rx1day)
199040.9 mm (1.6 in)
199164.0 mm (2.5 in)
199257.9 mm (2.3 in)
199363.5 mm (2.5 in)
199483.8 mm (3.3 in)
199545.7 mm (1.8 in)
199655.9 mm (2.2 in)
199758.4 mm (2.3 in)
1998120.7 mm (4.8 in)
199950.8 mm (2.0 in)
200042.2 mm (1.7 in)
200150.8 mm (2.0 in)
200251.3 mm (2.0 in)
200362.2 mm (2.4 in)
200483.8 mm (3.3 in)
200549.5 mm (1.9 in)
200645.7 mm (1.8 in)
200771.9 mm (2.8 in)
200871.1 mm (2.8 in)
200971.1 mm (2.8 in)
201049.3 mm (1.9 in)
201147.0 mm (1.9 in)
201261.2 mm (2.4 in)
201368.6 mm (2.7 in)
2014154.9 mm (6.1 in)
201581.5 mm (3.2 in)
2016114.6 mm (4.5 in)
201781.3 mm (3.2 in)
201851.1 mm (2.0 in)
201986.4 mm (3.4 in)
202078.2 mm (3.1 in)
202191.4 mm (3.6 in)
202245.2 mm (1.8 in)
202338.1 mm (1.5 in)
202443.7 mm (1.7 in)
202560.2 mm (2.4 in)
202693.0 mm (3.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Dwight Wwtp by year The wettest five days of the year at Dwight Wwtp, 1990 to 2026. The record is 223.8 mm (8.8 in) in 2008, marked on the chart; the median year is 93.0 mm (3.7 in). 0501001502002501990200020102020Record: 223.8 mm (8.8 in) in 2008
The wettest five days of the year at Dwight Wwtp, 1990 to 2026. The record is 223.8 mm (8.8 in) in 2008, marked on the chart; the median year is 93.0 mm (3.7 in).
Wettest five days (Rx5day) at Dwight Wwtp by year
YearWettest five days (Rx5day)
199050.8 mm (2.0 in)
199191.6 mm (3.6 in)
199284.6 mm (3.3 in)
1993104.1 mm (4.1 in)
199495.5 mm (3.8 in)
199595.5 mm (3.8 in)
1996132.3 mm (5.2 in)
199790.0 mm (3.5 in)
1998185.7 mm (7.3 in)
1999101.1 mm (4.0 in)
200074.7 mm (2.9 in)
200193.0 mm (3.7 in)
200292.7 mm (3.6 in)
200398.1 mm (3.9 in)
200490.2 mm (3.6 in)
200549.5 mm (1.9 in)
200668.5 mm (2.7 in)
2007176.0 mm (6.9 in)
2008223.8 mm (8.8 in)
2009115.8 mm (4.6 in)
201087.4 mm (3.4 in)
201178.8 mm (3.1 in)
201288.1 mm (3.5 in)
2013124.7 mm (4.9 in)
2014173.2 mm (6.8 in)
201592.1 mm (3.6 in)
2016138.0 mm (5.4 in)
2017128.0 mm (5.0 in)
201879.0 mm (3.1 in)
2019119.3 mm (4.7 in)
2020152.4 mm (6.0 in)
2021129.8 mm (5.1 in)
202251.7 mm (2.0 in)
202359.9 mm (2.4 in)
202468.6 mm (2.7 in)
202594.8 mm (3.7 in)
202691.5 mm (3.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Dwight Wwtp by year The longest dry spell of the year at Dwight Wwtp, 1990 to 2026. The record is 35 days in 2017, marked on the chart; the median year is 18 days. 102030401990200020102020Record: 35 days in 2017
The longest dry spell of the year at Dwight Wwtp, 1990 to 2026. The record is 35 days in 2017, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Dwight Wwtp by year
YearLongest dry spell (CDD)
199011 days
199123 days
199216 days
199320 days
199417 days
199519 days
199620 days
199716 days
199819 days
199925 days
200018 days
200118 days
200222 days
200317 days
200422 days
200521 days
200616 days
200718 days
200818 days
200923 days
201026 days
201115 days
201221 days
201316 days
201413 days
201521 days
201615 days
201735 days
201816 days
201918 days
202016 days
202112 days
202220 days
202327 days
202422 days
202516 days
202624 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

32 years with a frost

Across 32 years with a frost, the median last spring frost at Dwight Wwtp falls on 25 April and the median first autumn frost on 12 October, which leaves a median of 172 days between them.

Fitted over all years, the growing season changes by +5.3 days per decade at this station.

Frost dates and growing season at Dwight Wwtp
MeasureMedian, all yearsEarliest periodRecent period (1993 to 2025)Recent against earliestFitted trend
Last spring frost25 Apriln/a25 Apriln/a-1.6 days per decade
First autumn frost12 Octobern/a12 Octobern/a+3.7 days per decade
Growing days172 daysn/a172 daysn/a+5.3 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

34 years, 1992 to 2025

A day with at least 60.6 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 169.7 mm (6.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Dwight Wwtp: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years60.6 mm (2.4 in)
5 years81.1 mm (3.2 in)
10 years97.7 mm (3.8 in)
25 years122.6 mm (4.8 in)
50 years144.5 mm (5.7 in)Longer than the 34 years of record
100 years169.7 mm (6.7 in)Longer than the 34 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, 34 years of values from 1992 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: 154.9 mm (6.1 in) in 2014; 120.7 mm (4.8 in) in 1998; 114.6 mm (4.5 in) in 2016.

Download the Data

  • Data for Dwight Wwtp standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Dwight 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-15).