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Weather & Climate
Pontiac, Illinois, United States
Overview
Available climate summaries for Pontiac. Origins and reference periods are unverified; stored values may include AI estimates. Treat these as estimates until independently verified.
Key Metrics
Annual Avg
10.5°C
Summer Avg
22.8°C
Winter Avg
-2.9°C
Record High
41.2°C
Record Low
-34.7°C
Annual Precipitation
975.3 mm
Avg Humidity
78%
Summer Humidity
75%
Winter Humidity
84%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 17.7° | -4.4° | -34.7° | 49.6 | 85% | 58 | 59.1 |
| Feb | 19.6° | -2.8° | -27.8° | 50.1 | 82% | 76 | 62.7 |
| Mar | 27.1° | 3.8° | -23.8° | 65.4 | 78% | 114 | 66.2 |
| Apr | 28.8° | 10.6° | -6.8° | 97.5 | 75% | 145 | 62.2 |
| May | 33.8° | 16.6° | -2.3° | 115.9 | 76% | 171 | 60.9 |
| Jun | 40.7° | 21.8° | 3.7° | 114.3 | 76% | 188 | 49.5 |
| Jul | 41.2° | 23.8° | 8.6° | 98.9 | 76% | 195 | 40.5 |
| Aug | 39.5° | 22.9° | 7.4° | 96.7 | 73% | 172 | 40.5 |
| Sep | 36.9° | 19.1° | 2.4° | 84.9 | 73% | 138 | 45.7 |
| Oct | 31.6° | 11.6° | -9.7° | 83.7 | 73% | 97 | 54.1 |
| Nov | 24.5° | 4.6° | -12.6° | 60.6 | 78% | 64 | 60.5 |
| Dec | 20.8° | -1.6° | -24.2° | 57.7 | 85% | 48 | 67.6 |
Data sources
Estimates and unverified origins
Oyster List climate data - Climate origins are unverified. Available methods include historical APIs and AI estimates; stored rows do not identify the original dataset, reference period, or model for each value. Treat these summaries as estimates until independently verified. Record updated 2026-03-23.
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