Chicago Weather

2026 (This Year)

Historical data
Average Temperature
17.1 °C
High
/
9.3 °C
Low
1111.9mm
Precipitation
35.8°C
Peak Temp
-23.0°C
Low Temp
282
Days Count

Seasonal Breakdown

Average temperatures and precipitation by season

Spring

92 days
15.7°C
Avg High
/
6.3°C
Avg Low
Precipitation
292.1mm

Summer

92 days
26.3°C
Avg High
/
19.3°C
Avg Low
Precipitation
521.6mm

Autumn

39 days
22.8°C
Avg High
/
16.8°C
Avg Low
Precipitation
230.7mm

Winter

59 days
0.9°C
Avg High
/
-6.5°C
Avg Low
Precipitation
67.5mm

Seasons based on meteorological calendar: Spring (Mar-May), Summer (Jun-Aug), Autumn (Sep-Nov), Winter (Dec-Feb)

Monthly Breakdown

Average temperatures and precipitation by month

January

31 days
-2.1°C / -9.2°C
Avg High / Low
Precipitation
50.9mm

February

28 days
4.3°C / -3.5°C
Avg High / Low
Precipitation
16.6mm

March

31 days
11.0°C / 0.9°C
Avg High / Low
Precipitation
94.8mm

April

30 days
16.4°C / 6.9°C
Avg High / Low
Precipitation
163.7mm

May

31 days
19.7°C / 11.0°C
Avg High / Low
Precipitation
33.6mm

June

30 days
24.6°C / 17.3°C
Avg High / Low
Precipitation
181.7mm

July

31 days
28.0°C / 20.8°C
Avg High / Low
Precipitation
106.0mm

August

31 days
26.3°C / 19.7°C
Avg High / Low
Precipitation
233.9mm

September

30 days
23.5°C / 18.0°C
Avg High / Low
Precipitation
186.4mm

October

9 days
20.6°C / 12.7°C
Avg High / Low
Precipitation
44.3mm

Temperature Trends

Daily high, low, and average

Weather Extremes

Most notable conditions during this period

Period High

35.8°C
Wednesday, July 1

Coolest Day

-14.1°C
Monday, January 26

Period Low

-23.0°C
Friday, January 23

Compare with historical weather

Load the same period from the previous 15 years.

Weather Insights

Key findings from analysis for selected period

Extreme Temperature Variations

Worth noting

Temperature extremes from -23.0°C to 35.8°C. 73 cold days and 1 very hot day.

🌦️

Moderate Rainfall Period

Info

Moderate rainfall during this period (40% of days).

📅

Seasonal Weather Patterns

Info
Rainfall Patterns:
Wettest: August (234mm), September (186mm)
Driest: February (17mm), May (34mm)

Temperature Patterns (Monthly Averages):
Hottest months: July (28.0°C), August (26.3°C)
Coolest months: January (-2.1°C), February (4.3°C)

Travel Recommendations:
Best visiting months: October, May, September (optimal temperature and rainfall balance).
⚠️

37 Exceptional Weather Events (showing top 3)

Info

The 3 most extreme of 37 notable days in this period:

Jul 1 Heat

Hottest day: 35.8°C

Jan 23 Cold

Coldest night: -23.0°C

Jan 1 Cold

Very cold night: -11.8°C

13 Extreme Heat Index Days

Worth noting

13 days with dangerous heat index levels (44.8°C average). Temperature 32.8°C combined with 75% humidity creates hazardous conditions.

High Humidity Levels

Info

Average humidity of 74% indicates persistently moist air conditions. Heat sensation amplified during warm periods (17.1°C average temperature). Humidity varied significantly (42%-98% range).

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Data Source

Weather data provided by Open-Meteo, offering reliable historical weather information from meteorological stations worldwide.

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