Chicago W Chicago Dupage AP Weather Records (USW00094892)

Record envelope, standing records and threshold days for Chicago W Chicago Dupage AP (USW00094892), Illinois, United States, with 30 years of record.

Key Facts for Chicago W Chicago Dupage AP

Chicago W Chicago Dupage AP (USW00094892) is a weather station in Illinois, United States at 41.90 latitude and -88.25 longitude, 228 m (749 ft) above sea level.
The station reports from 1997 to 2026, 30 years of record.
1,464 records set at Chicago W Chicago Dupage 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, 41.90 latitude, -88.25 longitude.
Elevation: 228 m (749 ft).
Period of record: 1997 to 2026, 30 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

36 days at or beyond a record

The band shows the record high and record low for each calendar day at Chicago W Chicago Dupage AP. The lines show the 2026 daily maximum and minimum. 36 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Chicago W Chicago Dupage AP, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	18.3 C (64.9 F)	-33.8 C (-28.8 F)	10.0 C (50.0 F)	-22.7 C (-8.9 F)
Feb	23.3 C (73.9 F)	-28.8 C (-19.8 F)	14.4 C (57.9 F)	-21.6 C (-6.9 F)
Mar	28.3 C (82.9 F)	-22.8 C (-9.0 F)	26.7 C (80.1 F)	-11.0 C (12.2 F)
Apr	31.1 C (88.0 F)	-8.8 C (16.2 F)	28.9 C (84.0 F)	-4.9 C (23.2 F)
May	35.6 C (96.1 F)	-3.3 C (26.1 F)	33.9 C (93.0 F)	1.1 C (34.0 F)
Jun	37.2 C (99.0 F)	1.1 C (34.0 F)	35.0 C (95.0 F)	4.4 C (39.9 F)
Jul	37.8 C (100.0 F)	5.6 C (42.1 F)	34.4 C (93.9 F)	13.3 C (55.9 F)
Aug	36.1 C (97.0 F)	6.1 C (43.0 F)	35.0 C (95.0 F)	8.9 C (48.0 F)
Sep	35.0 C (95.0 F)	0.0 C (32.0 F)	32.2 C (90.0 F)	5.6 C (42.1 F)
Oct	31.7 C (89.1 F)	-6.1 C (21.0 F)	31.7 C (89.1 F)	-1.7 C (28.9 F)
Nov	24.4 C (75.9 F)	-15.5 C (4.1 F)	21.1 C (70.0 F)	-12.2 C (10.0 F)
Dec	20.6 C (69.1 F)	-26.0 C (-14.8 F)	13.9 C (57.0 F)	-20.0 C (-4.0 F)

Which Years Hold Standing Records

1,464 standing records

1,464 records at Chicago W Chicago Dupage AP still stand. 2000 holds the most, with 73.

Standing records at Chicago W Chicago Dupage AP by the year they were set
Year set	Standing records
1997	48
1998	45
1999	54
2000	73
2001	50
2002	58
2003	42
2004	54
2005	52
2006	54
2007	50
2008	44
2009	44
2010	34
2011	37
2012	69
2013	60
2014	65
2015	49
2016	41
2017	61
2018	57
2019	48
2020	35
2021	50
2022	43
2023	51
2024	51
2025	45

Wettest Day of Each Month

Sep: 152.9 mm (6.0 in)

The wettest day on record for each calendar month at Chicago W Chicago Dupage AP. The most was 152.9 mm (6.0 in) on 13 September 2008.

Record daily precipitation for each month at Chicago W Chicago Dupage AP
Month	Record daily precipitation (mm)	Date
Jan	34.0 mm (1.3 in)	29 January 2013
Feb	45.0 mm (1.8 in)	26 February 2009
Mar	46.5 mm (1.8 in)	30 March 2017
Apr	59.4 mm (2.3 in)	18 April 2013
May	93.7 mm (3.7 in)	14 May 2020
Jun	78.5 mm (3.1 in)	15 June 2015
Jul	80.5 mm (3.2 in)	28 July 2023
Aug	72.6 mm (2.9 in)	13 August 2002
Sep	152.9 mm (6.0 in)	13 September 2008
Oct	99.1 mm (3.9 in)	14 October 2017
Nov	35.6 mm (1.4 in)	6 November 2000
Dec	39.1 mm (1.5 in)	27 December 2008

Period of Record Coverage

1997 to 2025

29 years of record at Chicago W Chicago Dupage 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 Chicago W Chicago Dupage AP
Year	Days with data	Share of year	Complete
1997	212	58%	No
1998	363	99%	Yes
1999	360	99%	Yes
2000	355	97%	Yes
2001	352	96%	Yes
2002	362	99%	Yes
2003	358	98%	Yes
2004	363	99%	Yes
2005	364	100%	Yes
2006	361	99%	Yes
2007	365	100%	Yes
2008	364	99%	Yes
2009	365	100%	Yes
2010	362	99%	Yes
2011	364	100%	Yes
2012	364	99%	Yes
2013	364	100%	Yes
2014	363	99%	Yes
2015	362	99%	Yes
2016	365	100%	Yes
2017	365	100%	Yes
2018	364	100%	Yes
2019	365	100%	Yes
2020	364	99%	Yes
2021	365	100%	Yes
2022	365	100%	Yes
2023	363	99%	Yes
2024	362	99%	Yes
2025	365	100%	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 Chicago W Chicago Dupage AP, 1998 to 2025. Blue stripes are years cooler than the station's own mean of 9.9 C (49.9 F); red stripes are warmer. The coolest year was 2014, at 8.1 C (46.6 F), and the warmest was 2024, at 11.6 C (52.9 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Chicago W Chicago Dupage AP as warming stripes, 1998 to 2025
Year	Annual mean temperature	Difference from the station mean
1998	10.8 C	+0.90 C
1999	9.8 C	-0.13 C
2000	9.1 C	-0.82 C
2001	9.7 C	-0.25 C
2002	9.6 C	-0.36 C
2003	8.9 C	-1.05 C
2004	9.2 C	-0.72 C
2005	10.1 C	+0.12 C
2006	10.5 C	+0.51 C
2007	10.1 C	+0.19 C
2008	9.1 C	-0.84 C
2009	9.5 C	-0.44 C
2010	10.2 C	+0.21 C
2011	9.9 C	-0.06 C
2012	11.4 C	+1.42 C
2013	8.7 C	-1.28 C
2014	8.1 C	-1.82 C
2015	9.6 C	-0.38 C
2016	10.7 C	+0.78 C
2017	10.4 C	+0.42 C
2018	9.5 C	-0.45 C
2019	9.7 C	-0.22 C
2020	10.4 C	+0.49 C
2021	10.7 C	+0.74 C
2022	9.7 C	-0.25 C
2023	11.0 C	+1.02 C
2024	11.6 C	+1.69 C
2025	10.5 C	+0.51 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 Chicago W Chicago Dupage AP: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.8 C (100.0 F)	2005	35.0 C (95.0 F)	30
Coldest night (TNn)	-33.8 C (-28.8 F)	2019	-23.5 C (-10.4 F)	30
Wettest day (Rx1day)	152.9 mm (6.0 in)	2008	50.0 mm (2.0 in)	29
Wettest five days (Rx5day)	203.7 mm (8.0 in)	2008	88.7 mm (3.5 in)	29
Longest dry spell (CDD)	37 days	2014	22 days	29

Hottest day (TXx)

The hottest day of the year at Chicago W Chicago Dupage AP, 1997 to 2026. The record is 37.8 C (100.0 F) in 2005, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at Chicago W Chicago Dupage AP by year
Year	Hottest day (TXx)
1997	35.6 C (96.1 F)
1998	34.4 C (93.9 F)
1999	36.7 C (98.1 F)
2000	33.3 C (91.9 F)
2001	34.4 C (93.9 F)
2002	35.6 C (96.1 F)
2003	35.0 C (95.0 F)
2004	32.2 C (90.0 F)
2005	37.8 C (100.0 F)
2006	36.7 C (98.1 F)
2007	33.3 C (91.9 F)
2008	35.0 C (95.0 F)
2009	36.1 C (97.0 F)
2010	34.4 C (93.9 F)
2011	36.1 C (97.0 F)
2012	37.8 C (100.0 F)
2013	33.9 C (93.0 F)
2014	32.8 C (91.0 F)
2015	33.9 C (93.0 F)
2016	33.9 C (93.0 F)
2017	34.4 C (93.9 F)
2018	35.0 C (95.0 F)
2019	35.6 C (96.1 F)
2020	34.4 C (93.9 F)
2021	35.0 C (95.0 F)
2022	36.7 C (98.1 F)
2023	36.1 C (97.0 F)
2024	36.1 C (97.0 F)
2025	35.0 C (95.0 F)
2026	34.4 C (93.9 F)

Coldest night (TNn)

The coldest night of the year at Chicago W Chicago Dupage AP, 1997 to 2026. The record is -33.8 C (-28.8 F) in 2019, marked on the chart; the median year is -23.5 C (-10.4 F).

Coldest night (TNn) at Chicago W Chicago Dupage AP by year
Year	Coldest night (TNn)
1997	-13.3 C (8.1 F)
1998	-19.4 C (-2.9 F)
1999	-31.1 C (-24.0 F)
2000	-24.4 C (-11.9 F)
2001	-20.0 C (-4.0 F)
2002	-22.8 C (-9.0 F)
2003	-22.2 C (-8.0 F)
2004	-23.3 C (-9.9 F)
2005	-21.1 C (-6.0 F)
2006	-22.1 C (-7.8 F)
2007	-23.8 C (-10.8 F)
2008	-23.8 C (-10.8 F)
2009	-29.9 C (-21.8 F)
2010	-21.6 C (-6.9 F)
2011	-28.8 C (-19.8 F)
2012	-17.1 C (1.2 F)
2013	-23.2 C (-9.8 F)
2014	-27.1 C (-16.8 F)
2015	-24.9 C (-12.8 F)
2016	-26.0 C (-14.8 F)
2017	-22.1 C (-7.8 F)
2018	-25.5 C (-13.9 F)
2019	-33.8 C (-28.8 F)
2020	-22.1 C (-7.8 F)
2021	-23.8 C (-10.8 F)
2022	-26.6 C (-15.9 F)
2023	-20.5 C (-4.9 F)
2024	-25.5 C (-13.9 F)
2025	-22.7 C (-8.9 F)
2026	-24.4 C (-11.9 F)

Wettest day (Rx1day)

The wettest day of the year at Chicago W Chicago Dupage AP, 1997 to 2026. The record is 152.9 mm (6.0 in) in 2008, marked on the chart; the median year is 50.0 mm (2.0 in).

Wettest day (Rx1day) at Chicago W Chicago Dupage AP by year
Year	Wettest day (Rx1day)
1997	n/a
1998	77.5 mm (3.1 in)
1999	49.5 mm (1.9 in)
2000	44.7 mm (1.8 in)
2001	66.0 mm (2.6 in)
2002	72.6 mm (2.9 in)
2003	53.8 mm (2.1 in)
2004	41.7 mm (1.6 in)
2005	34.8 mm (1.4 in)
2006	59.4 mm (2.3 in)
2007	50.0 mm (2.0 in)
2008	152.9 mm (6.0 in)
2009	45.0 mm (1.8 in)
2010	78.2 mm (3.1 in)
2011	48.5 mm (1.9 in)
2012	30.2 mm (1.2 in)
2013	59.4 mm (2.3 in)
2014	50.0 mm (2.0 in)
2015	78.5 mm (3.1 in)
2016	35.8 mm (1.4 in)
2017	99.1 mm (3.9 in)
2018	37.6 mm (1.5 in)
2019	50.8 mm (2.0 in)
2020	93.7 mm (3.7 in)
2021	44.2 mm (1.7 in)
2022	38.6 mm (1.5 in)
2023	80.5 mm (3.2 in)
2024	49.3 mm (1.9 in)
2025	43.2 mm (1.7 in)
2026	56.9 mm (2.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Chicago W Chicago Dupage AP, 1997 to 2026. The record is 203.7 mm (8.0 in) in 2008, marked on the chart; the median year is 88.7 mm (3.5 in).

Wettest five days (Rx5day) at Chicago W Chicago Dupage AP by year
Year	Wettest five days (Rx5day)
1997	n/a
1998	89.0 mm (3.5 in)
1999	67.1 mm (2.6 in)
2000	95.8 mm (3.8 in)
2001	119.9 mm (4.7 in)
2002	73.5 mm (2.9 in)
2003	109.4 mm (4.3 in)
2004	60.2 mm (2.4 in)
2005	40.1 mm (1.6 in)
2006	80.5 mm (3.2 in)
2007	59.9 mm (2.4 in)
2008	203.7 mm (8.0 in)
2009	64.5 mm (2.5 in)
2010	137.4 mm (5.4 in)
2011	88.7 mm (3.5 in)
2012	51.6 mm (2.0 in)
2013	109.2 mm (4.3 in)
2014	82.4 mm (3.2 in)
2015	124.0 mm (4.9 in)
2016	95.7 mm (3.8 in)
2017	141.3 mm (5.6 in)
2018	67.6 mm (2.7 in)
2019	103.7 mm (4.1 in)
2020	168.6 mm (6.6 in)
2021	97.9 mm (3.9 in)
2022	57.0 mm (2.2 in)
2023	84.3 mm (3.3 in)
2024	60.2 mm (2.4 in)
2025	78.7 mm (3.1 in)
2026	98.8 mm (3.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Chicago W Chicago Dupage AP, 1997 to 2026. The record is 37 days in 2014, marked on the chart; the median year is 22 days.

Longest dry spell (CDD) at Chicago W Chicago Dupage AP by year
Year	Longest dry spell (CDD)
1997	n/a
1998	25 days
1999	25 days
2000	21 days
2001	19 days
2002	25 days
2003	30 days
2004	20 days
2005	24 days
2006	18 days
2007	15 days
2008	18 days
2009	27 days
2010	20 days
2011	15 days
2012	23 days
2013	19 days
2014	37 days
2015	29 days
2016	19 days
2017	16 days
2018	15 days
2019	26 days
2020	20 days
2021	23 days
2022	22 days
2023	24 days
2024	22 days
2025	19 days
2026	33 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 Chicago W Chicago Dupage AP falls on 28 April and the median first autumn frost on 18 October, which leaves a median of 172 days between them.

Fitted over all years, the growing season changes by +4.9 days per decade at this station.

Frost dates and growing season at Chicago W Chicago Dupage AP
Measure	Median, all years	Earliest period	Recent period (1998 to 2025)	Recent against earliest	Fitted trend
Last spring frost	28 April	n/a	28 April	n/a	-0.3 days per decade
First autumn frost	18 October	n/a	18 October	n/a	+4.5 days per decade
Growing days	172 days	n/a	172 days	n/a	+4.9 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 Chicago W Chicago Dupage AP standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Chicago W Chicago Dupage 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).