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Built 2026-10-19 (19 October 2026)

Days with 25 cm (9.8 in) or more of snowfall in Chicago

Chicago has had days with 25 cm (9.8 in) or more of snowfall in 10 years, most in 1967 with 1. Days per year, season span, streaks and every date.

Key Facts for Chicago

  • Chicago has had days with 25 cm (9.8 in) or more of snowfall in 10 years, 10 days in all.
  • The most in one year was 1 days in 1967.
  • In 2015, the latest year on file, there were 1 such days.
  • The earliest first date in a year was 2 January 1999.
  • The latest last date in a year was 31 December 1978.
  • 2 years with under 90 percent of days observed are left out of these rankings.

Days per Year

10 years, 10 days
Days with 25 cm (9.8 in) or more of snowfall per year in Chicago Days per year in Chicago with 25 cm (9.8 in) or more of snowfall. The line is the decade average. The most was 1 in 1967. Grey bars are years with under 90 percent of days observed, left out of rankings. 001111967: 11969: 11975: 11978: 11979: 11999: 12000: 12010: 12011: 12015: 11967
Days per year in Chicago with 25 cm (9.8 in) or more of snowfall. The line is the decade average. The most was 1 in 1967. Grey bars are years with under 90 percent of days observed, left out of rankings.
Days with 25 cm (9.8 in) or more of snowfall per year in Chicago
YearDaysDecade average
196711
196911
197511
197811
197911
199911
200011
201011
201111
201511

Season Span

earliest 2 January, latest 31 December
First to last qualifying date each year in Chicago For each year, a bar from the first to the last day in Chicago meeting 25 cm (9.8 in). Long bars mean a long season. 1967: 26 January 1967 to 26 January 19671969: 23 December 1969 to 23 December 19691975: 2 April 1975 to 2 April 19751978: 31 December 1978 to 31 December 19781979: 13 January 1979 to 13 January 19791999: 2 January 1999 to 2 January 19992000: 18 February 2000 to 18 February 20002010: 9 February 2010 to 9 February 20102011: 1 February 2011 to 1 February 20112015: 1 February 2015 to 1 February 201519671975197920002011JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Chicago meeting 25 cm (9.8 in). Long bars mean a long season.
First to last qualifying date each year in Chicago
YearFirst dateLast date
19671967-01-261967-01-26
19691969-12-231969-12-23
19751975-04-021975-04-02
19781978-12-311978-12-31
19791979-01-131979-01-13
19991999-01-021999-01-02
20002000-02-182000-02-18
20102010-02-092010-02-09
20112011-02-012011-02-01
20152015-02-012015-02-01

Every Year

Days with 25 cm (9.8 in) or more of snowfall per year in Chicago
YearDaysFirst dateLast dateLongest streak in yearCoverage
201511 February 20151 February 20151 daysComplete
201111 February 20111 February 20111 daysComplete
201019 February 20109 February 20101 daysComplete
2000118 February 200018 February 20001 daysComplete
199912 January 19992 January 19991 daysComplete
1979113 January 197913 January 19791 daysComplete
1978131 December 197831 December 19781 daysComplete
197512 April 19752 April 19751 daysComplete
1969123 December 196923 December 19691 daysComplete
1967126 January 196726 January 19671 daysComplete
Decade averages for Days with 25 cm (9.8 in) or more of snowfall in Chicago
DecadeAverage days per yearYears counted
1960s1.02
1970s1.03
1990s1.01
2000s1.01
2010s1.03

Compare with your own threshold in the threshold explorer. Fahrenheit thresholds are converted to tenths of a degree Celsius once, rounding half up.

Download the Data

  • Data for Days with 25 cm (9.8 in) or more of snowfall in Chicago, 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site from the threaded city record.

Data as of . Last revised (2026-10-17).