Historical Weather for Chicago, United States
Showing historical weather data for 1 Jan to 31 Dec over the last 5 years (2025-2025).
Date window
Chicago, Illinois, United States (01-01 → 31-12)
Years 2025–2025 · Source: Meteostat
Showing 1 year series with 365 days for Chicago, Illinois, United States.
Latest Year Summary (2025)
Computed from observed daily Meteostat data for 2025 across the selected date window.
Average temperature
10.7°C
Long-term average unavailable
Total rainfall
815.9 mm
Across 2025 in the selected period
Rainfall details
- 🌧️ 182 rain days
- 💧 Wettest day: 2025-06-18 — 42.0 mm
Notable conditions
- 🔥 Heatwave days: 7
- 🥶 Frost days: 97
- ❄️ Snow days: 50
- 🌧️ Heavy rain days: 7
Average pressure
1,017.1 hPa
Weekly Rainfall Totals (2025)
Anomaly vs normal
n/a
No data
Record extremes
Daytime High: 35.6°C · 23 Jun 2025
Nighttime Low: -21.9°C · 18 Feb 2025
Precip & wind peaks
Rain: 42.0 mm · 18 Jun 2025
Wind: 21.2 kts · 26 Nov 2025
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How to read this weather history
Observed daily conditions for Chicago, Illinois, United States
The summary cards surface the main pattern first, while the chart and table below keep every day inspectable. Use this page for like-for-like date comparisons across years, not as a forecast.
Latest coverage
2025 · 365 days
01 Jan → 31 Dec from Meteostat.
Year span
2025
This view currently contains a single year of observations.
Observed extremes
High 35.6°C · Low -21.9°C
23 Jun 2025 to 18 Feb 2025 across 1 years.
Only one year is available for this selection, so the chart works best as a dated record of what happened rather than a long-term normal.
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Average temperature
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2025
365 days01 Jan → 31 Dec
Temperature
High: -15.4°C → 35.6°C
Low: -21.9°C → 25.9°C
Precipitation
Rain: 815.9 mm
Snow: 724.5 cm
Wind
18.0 km/h avg · 39.3 km/h peak
Accessible data table
Daily values for the first series (showing up to 30 rows)
| Day | High (°C) | Low (°C) | Rain (mm) (mm) | Snow (cm) (cm) | Wind (kts) (km/h) | Conditions |
|---|---|---|---|---|---|---|
| 01 Jan | 0.8°C | -3.0°C | 0.1 mm | 0.7 cm | 22.2 km/h | — |
| 02 Jan | -0.3°C | -4.2°C | 0.2 mm | 1.4 cm | 17.4 km/h | — |
| 03 Jan | -3.3°C | -7.4°C | 0.0 mm | 0.0 cm | 20.7 km/h | — |
| 04 Jan | -5.1°C | -10.9°C | 0.0 mm | 0.0 cm | 17.3 km/h | — |
| 05 Jan | -2.3°C | -9.0°C | 0.6 mm | 3.5 cm | 22.0 km/h | — |
| 06 Jan | -0.9°C | -4.6°C | 3.0 mm | 20.3 cm | 27.6 km/h | — |
| 07 Jan | -4.1°C | -8.6°C | 0.0 mm | 0.0 cm | 13.9 km/h | — |
| 08 Jan | -4.1°C | -10.2°C | 0.0 mm | 0.0 cm | 11.1 km/h | — |
| 09 Jan | -3.8°C | -11.6°C | 0.0 mm | 0.0 cm | 16.5 km/h | — |
| 10 Jan | -2.0°C | -6.6°C | 4.0 mm | 28.0 cm | 16.4 km/h | — |
| 11 Jan | -0.9°C | -6.0°C | 0.0 mm | 0.0 cm | 14.3 km/h | — |
| 12 Jan | 1.5°C | -4.7°C | 2.1 mm | 14.0 cm | 23.9 km/h | — |
| 13 Jan | -5.6°C | -12.7°C | 0.0 mm | 0.0 cm | 20.3 km/h | — |
| 14 Jan | -9.0°C | -12.9°C | 1.4 mm | 9.8 cm | 22.4 km/h | — |
| 15 Jan | -8.4°C | -15.7°C | 0.1 mm | 0.7 cm | 20.9 km/h | — |
| 16 Jan | 2.2°C | -8.0°C | 0.4 mm | 2.8 cm | 20.6 km/h | — |
| 17 Jan | 5.1°C | -4.8°C | 0.0 mm | 0.0 cm | 29.2 km/h | — |
| 18 Jan | 3.7°C | -6.9°C | 0.0 mm | 0.0 cm | 24.8 km/h | — |
| 19 Jan | -8.1°C | -16.1°C | 0.0 mm | 0.0 cm | 18.2 km/h | — |
| 20 Jan | -11.7°C | -18.5°C | 0.0 mm | 0.0 cm | 23.1 km/h | — |
| 21 Jan | -15.4°C | -21.0°C | 0.0 mm | 0.0 cm | 18.7 km/h | — |
| 22 Jan | -4.9°C | -18.2°C | 0.8 mm | 5.6 cm | 27.6 km/h | — |
| 23 Jan | -4.2°C | -12.9°C | 0.9 mm | 6.3 cm | 19.3 km/h | — |
| 24 Jan | -7.1°C | -16.5°C | 0.0 mm | 0.0 cm | 17.8 km/h | — |
| 25 Jan | 2.8°C | -6.7°C | 0.0 mm | 0.0 cm | 22.1 km/h | — |
| 26 Jan | -1.1°C | -7.9°C | 0.0 mm | 0.0 cm | 16.5 km/h | — |
| 27 Jan | 4.2°C | -7.3°C | 0.0 mm | 0.0 cm | 25.4 km/h | — |
| 28 Jan | 6.8°C | -2.6°C | 0.0 mm | 0.0 cm | 27.7 km/h | — |
| 29 Jan | 6.4°C | -0.3°C | 0.0 mm | 0.0 cm | 22.4 km/h | — |
| 30 Jan | 8.4°C | -2.4°C | 16.8 mm | 0.0 cm | 20.0 km/h | — |
Use this table for screen readers or to copy data. Values reflect the visible window.
Chicago Weather FAQ
Common questions about weather in Chicago, United States.
- Which month is usually hottest in Chicago?
- Based on monthly observations from 2011–2026, Chicago, United States is usually hottest in July, when average daytime highs reach 27.1°C. Overnight lows in July average 19.2°C.
- Which month is usually coldest in Chicago?
- Based on monthly observations from 2011–2026, Chicago, United States is coldest in January, with average nighttime lows around -6.3°C. Daytime highs in January average 0.5°C. The coldest reading in the archive for that month dropped to -19.5°C.
- Which month has the highest average daily precipitation in Chicago?
- Based on monthly observations from 2011–2026, July has the highest average daily precipitation in Chicago, United States at 5.3mm. That is wetter than January, the driest month in the archive at 1.8mm.
- Which month is usually driest in Chicago?
- Based on monthly observations from 2011–2026, January is the driest month in Chicago, United States, averaging 1.8mm of precipitation on a typical observed day. July is the wettest month by the same measure at 5.3mm.
- How large is the seasonal temperature swing in Chicago?
- Based on monthly observations from 2011–2026, Typical warm-season highs peak in July at 27.1°C, while the lowest average night temperatures arrive in January at -6.3°C. That puts the city's warm-to-cold seasonal swing at roughly 33.4°C.
- Which months in Chicago have average nighttime lows at or below freezing?
- Based on monthly observations from 2011–2026, Chicago, United States records average nighttime lows at or below 0°C in January and December. The lowest average low comes in January at -6.3°C.