Champaign Urbana Willard AP Weather Records (USW00094870)

Record envelope, standing records and threshold days for Champaign Urbana Willard AP (USW00094870), Illinois, United States, with 30 years of record.

Key Facts for Champaign Urbana Willard AP

Champaign Urbana Willard AP (USW00094870) is a weather station in Illinois, United States at 40.03 latitude and -88.28 longitude, 227 m (743 ft) above sea level.
The station reports from 1997 to 2026, 30 years of record.
1,464 records set at Champaign Urbana Willard AP still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Illinois, United States, 40.03 latitude, -88.28 longitude.
Elevation: 227 m (743 ft).
Period of record: 1997 to 2026, 30 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

45 days at or beyond a record

The band shows the record high and record low for each calendar day at Champaign Urbana Willard AP. The lines show the 2026 daily maximum and minimum. 45 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Champaign Urbana Willard AP, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	19.4 C (66.9 F)	-27.7 C (-17.9 F)	8.9 C (48.0 F)	-21.6 C (-6.9 F)
Feb	24.4 C (75.9 F)	-25.5 C (-13.9 F)	19.4 C (66.9 F)	-16.6 C (2.1 F)
Mar	30.0 C (86.0 F)	-22.7 C (-8.9 F)	28.3 C (82.9 F)	-9.3 C (15.3 F)
Apr	32.2 C (90.0 F)	-11.0 C (12.2 F)	29.4 C (84.9 F)	-3.8 C (25.2 F)
May	36.1 C (97.0 F)	-2.2 C (28.0 F)	34.4 C (93.9 F)	5.6 C (42.1 F)
Jun	37.8 C (100.0 F)	2.8 C (37.0 F)	35.6 C (96.1 F)	8.9 C (48.0 F)
Jul	38.9 C (102.0 F)	6.1 C (43.0 F)	33.9 C (93.0 F)	16.7 C (62.1 F)
Aug	36.1 C (97.0 F)	6.7 C (44.1 F)	35.0 C (95.0 F)	7.2 C (45.0 F)
Sep	37.2 C (99.0 F)	0.6 C (33.1 F)	35.6 C (96.1 F)	3.9 C (39.0 F)
Oct	33.9 C (93.0 F)	-6.0 C (21.2 F)	33.3 C (91.9 F)	-1.7 C (28.9 F)
Nov	27.2 C (81.0 F)	-18.2 C (-0.8 F)	23.9 C (75.0 F)	-11.1 C (12.0 F)
Dec	22.8 C (73.0 F)	-25.6 C (-14.1 F)	20.0 C (68.0 F)	-25.6 C (-14.1 F)

Which Years Hold Standing Records

1,464 standing records

1,464 records at Champaign Urbana Willard AP still stand. 2012 holds the most, with 90.

Standing records at Champaign Urbana Willard AP by the year they were set
Year set	Standing records
1997	43
1998	50
1999	50
2000	73
2001	59
2002	55
2003	50
2004	56
2005	41
2006	49
2007	51
2008	35
2009	43
2010	51
2011	47
2012	90
2013	45
2014	69
2015	49
2016	32
2017	61
2018	61
2019	39
2020	41
2021	38
2022	37
2023	44
2024	50
2025	55

Wettest Day of Each Month

May: 95.5 mm (3.8 in)

The wettest day on record for each calendar month at Champaign Urbana Willard AP. The most was 95.5 mm (3.8 in) on 21 May 2014.

Record daily precipitation for each month at Champaign Urbana Willard AP
Month	Record daily precipitation (mm)	Date
Jan	40.9 mm (1.6 in)	11 January 2020
Feb	75.4 mm (3.0 in)	20 February 2018
Mar	65.5 mm (2.6 in)	26 March 2004
Apr	55.1 mm (2.2 in)	18 April 2013
May	95.5 mm (3.8 in)	21 May 2014
Jun	91.2 mm (3.6 in)	3 June 2008
Jul	91.7 mm (3.6 in)	9 July 2024
Aug	70.9 mm (2.8 in)	12 August 1999
Sep	91.7 mm (3.6 in)	14 September 2008
Oct	65.3 mm (2.6 in)	24 October 2021
Nov	85.3 mm (3.4 in)	4 November 2024
Dec	53.6 mm (2.1 in)	26 December 2015

Period of Record Coverage

1997 to 2025

29 years of record at Champaign Urbana Willard AP, 1997 to 2025. 1 years have data for under 90 percent of days and are left out of rankings: 1997.

Days with data per year at Champaign Urbana Willard AP
Year	Days with data	Share of year	Complete
1997	211	58%	No
1998	355	97%	Yes
1999	360	99%	Yes
2000	365	100%	Yes
2001	363	99%	Yes
2002	362	99%	Yes
2003	364	100%	Yes
2004	363	99%	Yes
2005	361	99%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	360	98%	Yes
2009	362	99%	Yes
2010	365	100%	Yes
2011	364	100%	Yes
2012	365	100%	Yes
2013	365	100%	Yes
2014	364	100%	Yes
2015	365	100%	Yes
2016	366	100%	Yes
2017	365	100%	Yes
2018	363	99%	Yes
2019	365	100%	Yes
2020	366	100%	Yes
2021	364	100%	Yes
2022	365	100%	Yes
2023	363	99%	Yes
2024	366	100%	Yes
2025	361	99%	Yes

Latest Records

No records were set at this station in the latest data.

Climate Trend

28 complete years, 1998 to 2025

One stripe for each of 28 complete years at Champaign Urbana Willard AP, 1998 to 2025. Blue stripes are years cooler than the station's own mean of 11.5 C (52.7 F); red stripes are warmer. The coolest year was 2014, at 9.8 C (49.6 F), and the warmest was 2012, at 13.1 C (55.5 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Champaign Urbana Willard AP as warming stripes, 1998 to 2025
Year	Annual mean temperature	Difference from the station mean
1998	12.6 C	+1.08 C
1999	11.6 C	+0.06 C
2000	10.5 C	-0.96 C
2001	11.4 C	-0.14 C
2002	11.3 C	-0.25 C
2003	10.4 C	-1.15 C
2004	11.1 C	-0.41 C
2005	11.4 C	-0.07 C
2006	11.7 C	+0.17 C
2007	11.5 C	+0.01 C
2008	10.1 C	-1.40 C
2009	10.4 C	-1.10 C
2010	11.2 C	-0.29 C
2011	11.7 C	+0.16 C
2012	13.1 C	+1.57 C
2013	10.7 C	-0.80 C
2014	9.8 C	-1.75 C
2015	11.5 C	-0.02 C
2016	12.6 C	+1.06 C
2017	12.6 C	+1.11 C
2018	11.2 C	-0.26 C
2019	11.1 C	-0.45 C
2020	11.6 C	+0.06 C
2021	12.2 C	+0.66 C
2022	11.3 C	-0.20 C
2023	12.8 C	+1.31 C
2024	13.1 C	+1.56 C
2025	12.1 C	+0.55 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1997 to 2026

Yearly extremes at Champaign Urbana Willard AP: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.9 C (102.0 F)	2001	35.6 C (96.1 F)	30
Coldest night (TNn)	-27.7 C (-17.9 F)	2009	-22.9 C (-9.3 F)	30
Wettest day (Rx1day)	95.5 mm (3.8 in)	2014	57.7 mm (2.3 in)	29
Wettest five days (Rx5day)	167.7 mm (6.6 in)	2008	90.5 mm (3.6 in)	29
Longest dry spell (CDD)	44 days	2012	20 days	29

Hottest day (TXx)

The hottest day of the year at Champaign Urbana Willard AP, 1997 to 2026. The record is 38.9 C (102.0 F) in 2001, marked on the chart; the median year is 35.6 C (96.1 F).

Hottest day (TXx) at Champaign Urbana Willard AP by year
Year	Hottest day (TXx)
1997	36.1 C (97.0 F)
1998	35.6 C (96.1 F)
1999	34.4 C (93.9 F)
2000	35.6 C (96.1 F)
2001	38.9 C (102.0 F)
2002	35.6 C (96.1 F)
2003	35.0 C (95.0 F)
2004	34.4 C (93.9 F)
2005	35.0 C (95.0 F)
2006	35.6 C (96.1 F)
2007	35.6 C (96.1 F)
2008	33.3 C (91.9 F)
2009	33.9 C (93.0 F)
2010	36.1 C (97.0 F)
2011	37.2 C (99.0 F)
2012	38.3 C (100.9 F)
2013	36.7 C (98.1 F)
2014	33.9 C (93.0 F)
2015	35.0 C (95.0 F)
2016	34.4 C (93.9 F)
2017	36.1 C (97.0 F)
2018	36.1 C (97.0 F)
2019	35.0 C (95.0 F)
2020	34.4 C (93.9 F)
2021	36.1 C (97.0 F)
2022	37.8 C (100.0 F)
2023	35.6 C (96.1 F)
2024	35.6 C (96.1 F)
2025	35.6 C (96.1 F)
2026	36.1 C (97.0 F)

Coldest night (TNn)

The coldest night of the year at Champaign Urbana Willard AP, 1997 to 2026. The record is -27.7 C (-17.9 F) in 2009, marked on the chart; the median year is -22.9 C (-9.3 F).

Coldest night (TNn) at Champaign Urbana Willard AP by year
Year	Coldest night (TNn)
1997	-13.9 C (7.0 F)
1998	-22.2 C (-8.0 F)
1999	-26.1 C (-15.0 F)
2000	-24.4 C (-11.9 F)
2001	-20.6 C (-5.1 F)
2002	-17.2 C (1.0 F)
2003	-23.9 C (-11.0 F)
2004	-26.7 C (-16.1 F)
2005	-20.6 C (-5.1 F)
2006	-17.7 C (0.1 F)
2007	-23.8 C (-10.8 F)
2008	-20.5 C (-4.9 F)
2009	-27.7 C (-17.9 F)
2010	-24.3 C (-11.7 F)
2011	-24.9 C (-12.8 F)
2012	-16.6 C (2.1 F)
2013	-19.3 C (-2.7 F)
2014	-24.9 C (-12.8 F)
2015	-25.5 C (-13.9 F)
2016	-19.9 C (-3.8 F)
2017	-23.2 C (-9.8 F)
2018	-26.0 C (-14.8 F)
2019	-26.6 C (-15.9 F)
2020	-21.0 C (-5.8 F)
2021	-22.1 C (-7.8 F)
2022	-22.7 C (-8.9 F)
2023	-15.5 C (4.1 F)
2024	-22.7 C (-8.9 F)
2025	-25.6 C (-14.1 F)
2026	-23.3 C (-9.9 F)

Wettest day (Rx1day)

The wettest day of the year at Champaign Urbana Willard AP, 1997 to 2026. The record is 95.5 mm (3.8 in) in 2014, marked on the chart; the median year is 57.7 mm (2.3 in).

Wettest day (Rx1day) at Champaign Urbana Willard AP by year
Year	Wettest day (Rx1day)
1997	n/a
1998	44.5 mm (1.8 in)
1999	70.9 mm (2.8 in)
2000	57.7 mm (2.3 in)
2001	43.2 mm (1.7 in)
2002	81.3 mm (3.2 in)
2003	70.4 mm (2.8 in)
2004	65.5 mm (2.6 in)
2005	49.0 mm (1.9 in)
2006	40.9 mm (1.6 in)
2007	55.9 mm (2.2 in)
2008	91.7 mm (3.6 in)
2009	48.8 mm (1.9 in)
2010	41.4 mm (1.6 in)
2011	48.0 mm (1.9 in)
2012	77.5 mm (3.1 in)
2013	74.4 mm (2.9 in)
2014	95.5 mm (3.8 in)
2015	61.7 mm (2.4 in)
2016	61.2 mm (2.4 in)
2017	54.1 mm (2.1 in)
2018	79.0 mm (3.1 in)
2019	34.0 mm (1.3 in)
2020	56.1 mm (2.2 in)
2021	65.3 mm (2.6 in)
2022	44.5 mm (1.8 in)
2023	51.1 mm (2.0 in)
2024	91.7 mm (3.6 in)
2025	34.3 mm (1.4 in)
2026	61.7 mm (2.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Champaign Urbana Willard AP, 1997 to 2026. The record is 167.7 mm (6.6 in) in 2008, marked on the chart; the median year is 90.5 mm (3.6 in).

Wettest five days (Rx5day) at Champaign Urbana Willard AP by year
Year	Wettest five days (Rx5day)
1997	n/a
1998	107.5 mm (4.2 in)
1999	95.6 mm (3.8 in)
2000	68.4 mm (2.7 in)
2001	59.8 mm (2.4 in)
2002	115.6 mm (4.6 in)
2003	159.1 mm (6.3 in)
2004	108.5 mm (4.3 in)
2005	74.3 mm (2.9 in)
2006	81.8 mm (3.2 in)
2007	69.3 mm (2.7 in)
2008	167.7 mm (6.6 in)
2009	76.7 mm (3.0 in)
2010	73.9 mm (2.9 in)
2011	78.3 mm (3.1 in)
2012	84.1 mm (3.3 in)
2013	94.9 mm (3.7 in)
2014	95.5 mm (3.8 in)
2015	114.3 mm (4.5 in)
2016	118.1 mm (4.6 in)
2017	90.5 mm (3.6 in)
2018	133.0 mm (5.2 in)
2019	58.6 mm (2.3 in)
2020	83.1 mm (3.3 in)
2021	116.9 mm (4.6 in)
2022	55.7 mm (2.2 in)
2023	75.6 mm (3.0 in)
2024	108.7 mm (4.3 in)
2025	54.7 mm (2.2 in)
2026	137.2 mm (5.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Champaign Urbana Willard AP, 1997 to 2026. The record is 44 days in 2012, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at Champaign Urbana Willard AP by year
Year	Longest dry spell (CDD)
1997	n/a
1998	32 days
1999	24 days
2000	20 days
2001	25 days
2002	32 days
2003	13 days
2004	23 days
2005	23 days
2006	16 days
2007	22 days
2008	18 days
2009	16 days
2010	17 days
2011	19 days
2012	44 days
2013	27 days
2014	20 days
2015	37 days
2016	21 days
2017	19 days
2018	12 days
2019	12 days
2020	15 days
2021	12 days
2022	19 days
2023	20 days
2024	24 days
2025	29 days
2026	19 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

28 years with a frost

Across 28 years with a frost, the median last spring frost at Champaign Urbana Willard AP falls on 19 April and the median first autumn frost on 17 October, which leaves a median of 181 days between them.

Fitted over all years, the growing season changes by +1.7 days per decade at this station.

Frost dates and growing season at Champaign Urbana Willard AP
Measure	Median, all years	Earliest period	Recent period (1998 to 2025)	Recent against earliest	Fitted trend
Last spring frost	19 April	n/a	19 April	n/a	+2.7 days per decade
First autumn frost	17 October	n/a	17 October	n/a	+4.4 days per decade
Growing days	181 days	n/a	181 days	n/a	+1.7 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.

Download the Data

Data for Champaign Urbana Willard AP standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Champaign Urbana Willard AP 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

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