Daily records
Page built 2026-10-17
Data as of 2026-10-15
Search
Built 2026-10-17 (17 October 2026)

Harvard Wwtp Weather Records (USC00113902)

Record envelope, standing records and threshold days for Harvard Wwtp (USC00113902), Illinois, United States, with 37 years of record.

Key Facts for Harvard Wwtp

  • Harvard Wwtp (USC00113902) is a weather station in Illinois, United States at 42.42 latitude and -88.63 longitude, 279 m (916 ft) above sea level.
  • The station reports from 1990 to 2026, 37 years of record.
  • 0 records set at Harvard Wwtp still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Harvard Wwtp set a daily record precipitation of 42.4 mm (1.7 in) on 19 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, 42.42 latitude, -88.63 longitude.
  • Elevation: 279 m (916 ft).
  • Period of record: 1990 to 2026, 37 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Harvard Wwtp, with 2026 drawn through them The band shows the record high and record low for each calendar day at Harvard Wwtp. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Harvard Wwtp. 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 Harvard Wwtp, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jann/an/an/an/a
Febn/an/an/an/a
Marn/an/an/an/a
Aprn/an/an/an/a
Mayn/an/an/an/a
Junn/an/an/an/a
Juln/an/an/an/a
Augn/an/an/an/a
Sepn/an/an/an/a
Octn/an/an/an/a
Novn/an/an/an/a
Decn/an/an/an/a

Which Years Hold Standing Records

0 standing records
Standing records at Harvard Wwtp by the year they were set 0 records at Harvard Wwtp still stand. 00000000000
0 records at Harvard Wwtp still stand.
Standing records at Harvard Wwtp by the year they were set
Year setStanding records

Wettest Day of Each Month

Jun: 107.2 mm (4.2 in)
Record daily precipitation for each month at Harvard Wwtp The wettest day on record for each calendar month at Harvard Wwtp. The most was 107.2 mm (4.2 in) on 13 June 2000. 050100150 Jan: 34.0 mm (1.3 in), 29 January 2006 Jan Feb: 57.4 mm (2.3 in), 20 February 1994 Feb Mar: 45.5 mm (1.8 in), 26 March 2024 Mar Apr: 87.9 mm (3.5 in), 18 April 2013 Apr May: 63.0 mm (2.5 in), 21 May 1996 May Jun: 107.2 mm (4.2 in), 13 June 2000 Jun Jul: 102.9 mm (4.1 in), 24 July 2010 Jul Aug: 86.9 mm (3.4 in), 22 August 2002 Aug Sep: 99.1 mm (3.9 in), 13 September 2019 Sep Oct: 66.8 mm (2.6 in), 5 October 1991 Oct Nov: 46.7 mm (1.8 in), 27 November 2015 Nov Dec: 42.9 mm (1.7 in), 14 December 2015 Dec
The wettest day on record for each calendar month at Harvard Wwtp. The most was 107.2 mm (4.2 in) on 13 June 2000.
Record daily precipitation for each month at Harvard Wwtp
MonthRecord daily precipitation (mm)Date
Jan34.0 mm (1.3 in)29 January 2006
Feb57.4 mm (2.3 in)20 February 1994
Mar45.5 mm (1.8 in)26 March 2024
Apr87.9 mm (3.5 in)18 April 2013
May63.0 mm (2.5 in)21 May 1996
Jun107.2 mm (4.2 in)13 June 2000
Jul102.9 mm (4.1 in)24 July 2010
Aug86.9 mm (3.4 in)22 August 2002
Sep99.1 mm (3.9 in)13 September 2019
Oct66.8 mm (2.6 in)5 October 1991
Nov46.7 mm (1.8 in)27 November 2015
Dec42.9 mm (1.7 in)14 December 2015

Latest Records

20
Latest records at Harvard Wwtp
DateStationRecordValueBeat old record byOld record stoodSignificance
19 September 2026Harvard Wwtp, USdaily rain (Provisional)42.4 mm (1.7 in)1.8 mm (0.07 in)24 years11 of 100 (Routine)
30 August 2026Harvard Wwtp, USdaily rain (Tie, Provisional)14.0 mm (0.6 in)tie32 years3 of 100 (Routine)
25 June 2026Harvard Wwtp, USdaily rain38.4 mm (1.5 in)2.8 mm (0.11 in)12 years7 of 100 (Routine)
18 June 2026Harvard Wwtp, USdaily rain27.9 mm (1.1 in)0.7 mm (0.03 in)33 years13 of 100 (Routine)
12 June 2026Harvard Wwtp, USdaily rain55.1 mm (2.2 in)16.5 mm (0.6 in)11 years16 of 100 (Routine)
15 April 2026Harvard Wwtp, USdaily rain47.0 mm (1.9 in)8.9 mm (0.35 in)13 years16 of 100 (Routine)
10 April 2026Harvard Wwtp, USdaily rain (Tie)26.7 mm (1.1 in)tie11 years1 of 100 (Routine)
4 April 2026Harvard Wwtp, USdaily rain26.7 mm (1.1 in)12.5 mm (0.5 in)17 years20 of 100 (Routine)
2 April 2026Harvard Wwtp, USdaily rain22.6 mm (0.9 in)8.9 mm (0.35 in)0 years12 of 100 (Routine)
16 March 2026Harvard Wwtp, USdaily rain34.3 mm (1.4 in)18.6 mm (0.7 in)9 years28 of 100 (Routine)
11 March 2026Harvard Wwtp, USdaily rain18.5 mm (0.7 in)4.0 mm (0.16 in)12 years11 of 100 (Routine)
7 March 2026Harvard Wwtp, USdaily rain25.7 mm (1.0 in)0.8 mm (0.03 in)33 years14 of 100 (Routine)
19 October 2025Harvard Wwtp, USdaily rain11.4 mm (0.4 in)1.2 mm (0.05 in)34 years14 of 100 (Routine)
7 October 2025Harvard Wwtp, USdaily rain14.5 mm (0.6 in)1.8 mm (0.07 in)30 years13 of 100 (Routine)
26 July 2025Harvard Wwtp, USdaily rain8.9 mm (0.35 in)6.1 mm (0.24 in)19 years12 of 100 (Routine)
11 July 2025Harvard Wwtp, USdaily rain45.2 mm (1.8 in)7.4 mm (0.29 in)16 years12 of 100 (Routine)
4 June 2025Harvard Wwtp, USdaily rain47.0 mm (1.9 in)3.8 mm (0.15 in)23 years11 of 100 (Routine)
2 April 2025Harvard Wwtp, USdaily rain13.7 mm (0.5 in)2.0 mm (0.08 in)0 years5 of 100 (Routine)
17 March 2025Harvard Wwtp, USdaily rain7.6 mm (0.30 in)3.8 mm (0.15 in)19 years12 of 100 (Routine)
31 January 2025Harvard Wwtp, USdaily rain15.2 mm (0.6 in)1.5 mm (0.06 in)4 years6 of 100 (Routine)

Extremes by Year

1990 to 2026
Yearly extremes at Harvard Wwtp: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)107.2 mm (4.2 in)200068.6 mm (2.7 in)37
Wettest five days (Rx5day)169.4 mm (6.7 in)201999.1 mm (3.9 in)37
Longest dry spell (CDD)40 days199521 days37

Wettest day (Rx1day)

Wettest day (Rx1day) at Harvard Wwtp by year The wettest day of the year at Harvard Wwtp, 1990 to 2026. The record is 107.2 mm (4.2 in) in 2000, marked on the chart; the median year is 68.6 mm (2.7 in). 204060801001201990200020102020Record: 107.2 mm (4.2 in) in 2000
The wettest day of the year at Harvard Wwtp, 1990 to 2026. The record is 107.2 mm (4.2 in) in 2000, marked on the chart; the median year is 68.6 mm (2.7 in).
Wettest day (Rx1day) at Harvard Wwtp by year
YearWettest day (Rx1day)
199033.3 mm (1.3 in)
199166.8 mm (2.6 in)
199274.4 mm (2.9 in)
199397.8 mm (3.9 in)
199457.4 mm (2.3 in)
199575.2 mm (3.0 in)
199669.3 mm (2.7 in)
199799.1 mm (3.9 in)
199870.6 mm (2.8 in)
199967.1 mm (2.6 in)
2000107.2 mm (4.2 in)
200189.4 mm (3.5 in)
200286.9 mm (3.4 in)
200340.6 mm (1.6 in)
200448.5 mm (1.9 in)
200545.7 mm (1.8 in)
200648.3 mm (1.9 in)
200772.6 mm (2.9 in)
200860.5 mm (2.4 in)
200940.1 mm (1.6 in)
2010102.9 mm (4.1 in)
201171.6 mm (2.8 in)
201251.8 mm (2.0 in)
201387.9 mm (3.5 in)
201435.6 mm (1.4 in)
201549.5 mm (1.9 in)
201649.5 mm (1.9 in)
201769.3 mm (2.7 in)
2018106.7 mm (4.2 in)
201999.1 mm (3.9 in)
202068.6 mm (2.7 in)
202166.3 mm (2.6 in)
202273.7 mm (2.9 in)
202356.4 mm (2.2 in)
2024101.6 mm (4.0 in)
202550.8 mm (2.0 in)
202655.9 mm (2.2 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Harvard Wwtp by year The wettest five days of the year at Harvard Wwtp, 1990 to 2026. The record is 169.4 mm (6.7 in) in 2019, marked on the chart; the median year is 99.1 mm (3.9 in). 0501001502001990200020102020Record: 169.4 mm (6.7 in) in 2019
The wettest five days of the year at Harvard Wwtp, 1990 to 2026. The record is 169.4 mm (6.7 in) in 2019, marked on the chart; the median year is 99.1 mm (3.9 in).
Wettest five days (Rx5day) at Harvard Wwtp by year
YearWettest five days (Rx5day)
199048.7 mm (1.9 in)
199183.0 mm (3.3 in)
199295.2 mm (3.7 in)
1993129.8 mm (5.1 in)
199467.5 mm (2.7 in)
199589.5 mm (3.5 in)
199690.6 mm (3.6 in)
199799.1 mm (3.9 in)
1998111.0 mm (4.4 in)
1999123.0 mm (4.8 in)
2000148.4 mm (5.8 in)
2001145.5 mm (5.7 in)
2002101.6 mm (4.0 in)
200383.1 mm (3.3 in)
200484.6 mm (3.3 in)
200574.9 mm (2.9 in)
200679.2 mm (3.1 in)
2007141.4 mm (5.6 in)
2008119.3 mm (4.7 in)
200971.1 mm (2.8 in)
2010153.0 mm (6.0 in)
2011104.6 mm (4.1 in)
201252.1 mm (2.1 in)
2013160.8 mm (6.3 in)
201469.1 mm (2.7 in)
2015104.7 mm (4.1 in)
201675.9 mm (3.0 in)
2017115.3 mm (4.5 in)
2018154.2 mm (6.1 in)
2019169.4 mm (6.7 in)
202086.4 mm (3.4 in)
202187.4 mm (3.4 in)
2022137.2 mm (5.4 in)
202375.4 mm (3.0 in)
2024124.5 mm (4.9 in)
202581.8 mm (3.2 in)
2026133.1 mm (5.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Harvard Wwtp by year The longest dry spell of the year at Harvard Wwtp, 1990 to 2026. The record is 40 days in 1995, marked on the chart; the median year is 21 days. 102030401990200020102020Record: 40 days in 1995
The longest dry spell of the year at Harvard Wwtp, 1990 to 2026. The record is 40 days in 1995, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Harvard Wwtp by year
YearLongest dry spell (CDD)
199015 days
199128 days
199219 days
199318 days
199422 days
199540 days
199628 days
199715 days
199821 days
199933 days
200019 days
200119 days
200229 days
200327 days
200423 days
200517 days
200618 days
200727 days
200820 days
200922 days
201018 days
201118 days
201219 days
201318 days
201415 days
201526 days
201619 days
201733 days
201820 days
201926 days
202017 days
202122 days
202221 days
202324 days
202429 days
202522 days
202614 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.

Rainfall Return Levels

35 years, 1991 to 2025

A day with at least 68.5 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 126.3 mm (5.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Harvard Wwtp: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years68.5 mm (2.7 in)
5 years87.9 mm (3.5 in)
10 years98.9 mm (3.9 in)
25 years111.1 mm (4.4 in)
50 years119.1 mm (4.7 in)Longer than the 35 years of record
100 years126.3 mm (5.0 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 1991 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: 107.2 mm (4.2 in) in 2000; 106.7 mm (4.2 in) in 2018; 102.9 mm (4.1 in) in 2010.

Download the Data

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