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Built 2026-10-19 (19 October 2026)

Nights at or below -30 C (-22 F) in Chicago

Chicago has had nights with a minimum temperature at or below -30 C (-22 F) in 5 years, most in 1982 with 3. Days per year, season span, streaks and every date.

Key Facts for Chicago

  • Chicago has had nights with a minimum temperature at or below -30 C (-22 F) in 5 years, 8 days in all.
  • The most in one year was 3 days in 1982.
  • In 2019, the latest year on file, there were 1 such days.
  • The earliest first date in a year was 10 January 1982.
  • The latest last date in a year was 24 December 1983.
  • The longest run inside a single year was 2 days in 1982.
  • 2 years with under 90 percent of days observed are left out of these rankings.

Days per Year

5 years, 8 days
Nights at or below -30 C (-22 F) per year in Chicago Days per year in Chicago with a minimum temperature at or below -30 C (-22 F). The line is the decade average. The most was 3 in 1982. Grey bars are years with under 90 percent of days observed, left out of rankings. 01231982: 31983: 11984: 11985: 22019: 11982
Days per year in Chicago with a minimum temperature at or below -30 C (-22 F). The line is the decade average. The most was 3 in 1982. Grey bars are years with under 90 percent of days observed, left out of rankings.
Nights at or below -30 C (-22 F) per year in Chicago
YearDaysDecade average
198231.8
198311.8
198411.8
198521.8
201911

Season Span

earliest 10 January, latest 24 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 -30 C (-22 F). Long bars mean a long season. 1982: 10 January 1982 to 17 January 19821983: 24 December 1983 to 24 December 19831984: 21 January 1984 to 21 January 19841985: 19 January 1985 to 20 January 19852019: 30 January 2019 to 30 January 201919821983198419852019JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Chicago meeting -30 C (-22 F). Long bars mean a long season.
First to last qualifying date each year in Chicago
YearFirst dateLast date
19821982-01-101982-01-17
19831983-12-241983-12-24
19841984-01-211984-01-21
19851985-01-191985-01-20
20192019-01-302019-01-30

Every Year

Nights at or below -30 C (-22 F) per year in Chicago
YearDaysFirst dateLast dateLongest streak in yearCoverage
2019130 January 201930 January 20191 daysComplete
1985219 January 198520 January 19852 daysComplete
1984121 January 198421 January 19841 daysComplete
1983124 December 198324 December 19831 daysComplete
1982310 January 198217 January 19822 daysComplete
Decade averages for Nights at or below -30 C (-22 F) in Chicago
DecadeAverage days per yearYears counted
1980s1.84
2010s1.01

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 Nights at or below -30 C (-22 F) 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).