Historical Weather for Chicago, United States

Showing historical weather data for 1 Sept to 30 Sept over the last 5 years (2025-2025).

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Chicago, Illinois, United States (01-09 → 30-09)

Years 2025–2025 · Source: Meteostat

Weather Summary

Automated rules using observed Meteostat data (no AI calls).

Average temperature

20.0°C

Above long-term avg by 0.0°C

Total rainfall

38.5 mm

Across the selected period

Notable conditions

Heatwave days: 0
Frost days: 0
Heavy rain days: 0

Daily temperature vs long-term average

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Recent period Long-term average

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Anomaly vs normal

0.0°C

Warmer than the multi-year average

Record extremes

Record high: 29.7°C · 27 Sept 2025

Record low: 9.9°C · 07 Sept 2025

Precip & wind peaks

Rain: 13.7 mm · 03 Sept 2025

Wind: 12.4 kts · 05 Sept 2025

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Average temperature

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01 Sept→01 Sept

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Time Travel Insight

Typical weather for 2025.

Temperatures were consistent with the long-term average.

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Recommended

Season-ready gear & services

Ambient weather station

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Davis Vantage Vue

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Travel insurance

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Cover trips when weather shifts your plans. Compare plans and buy online.

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Rain shell & winter kit

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Packable rain jackets, gloves, and heated socks for cold snaps.

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Soil & irrigation sensors

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Automate watering and protect plants from frost with moisture + temp alerts.

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Smart thermostat

Home energy

Trim heating and cooling costs when temps swing outside the norm.

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2025

30 days

01 Sept → 30 Sept

Temperature

High: 18.2°C → 29.7°C

Low: 9.9°C → 19.2°C

Precipitation

Rain: 38.5 mm

Snow: 0.0 cm

Wind

7.1 kts avg · 12.4 kts peak

Accessible data table

Daily values for the first series (showing up to 30 rows)

Day	High (°C)	Low (°C)	Rain (mm)	Wind (kts)
01 Sept	23.1°C	16.0°C	0.0 mm	5.2 kts
02 Sept	24.5°C	16.5°C	0.1 mm	5.6 kts
03 Sept	20.4°C	14.9°C	13.7 mm	10.1 kts
04 Sept	18.7°C	10.7°C	0.0 mm	8.0 kts
05 Sept	18.6°C	12.9°C	0.0 mm	12.4 kts
06 Sept	18.2°C	10.4°C	0.0 mm	9.9 kts
07 Sept	19.0°C	9.9°C	0.0 mm	5.4 kts
08 Sept	21.0°C	10.6°C	0.0 mm	4.9 kts
09 Sept	23.4°C	12.1°C	0.0 mm	5.4 kts
10 Sept	26.5°C	15.7°C	0.0 mm	5.5 kts
11 Sept	23.3°C	17.4°C	0.0 mm	6.6 kts
12 Sept	28.0°C	16.5°C	0.0 mm	7.2 kts
13 Sept	26.2°C	18.0°C	7.5 mm	7.8 kts
14 Sept	25.0°C	18.5°C	0.0 mm	6.8 kts
15 Sept	24.3°C	18.1°C	0.0 mm	6.5 kts
16 Sept	25.4°C	17.4°C	0.0 mm	5.7 kts
17 Sept	25.4°C	17.2°C	0.0 mm	4.9 kts
18 Sept	27.6°C	17.0°C	0.0 mm	6.5 kts
19 Sept	28.3°C	18.6°C	0.0 mm	6.8 kts
20 Sept	25.8°C	19.1°C	5.5 mm	6.8 kts
21 Sept	25.3°C	19.2°C	4.5 mm	7.6 kts
22 Sept	24.6°C	18.6°C	0.4 mm	7.5 kts
23 Sept	23.4°C	17.5°C	6.2 mm	9.5 kts
24 Sept	19.5°C	16.5°C	0.2 mm	10.4 kts
25 Sept	20.3°C	15.4°C	0.4 mm	7.7 kts
26 Sept	26.0°C	14.3°C	0.0 mm	5.9 kts
27 Sept	29.7°C	17.4°C	0.0 mm	7.2 kts
28 Sept	23.0°C	19.2°C	0.0 mm	5.6 kts
29 Sept	26.3°C	17.2°C	0.0 mm	5.8 kts
30 Sept	24.8°C	18.6°C	0.0 mm	7.8 kts

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