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Weather & Climate
Sycamore, Illinois, United States
Overview
Available climate summaries for Sycamore. Origins and reference periods are unverified; stored values may include AI estimates. Treat these as estimates until independently verified.
Key Metrics
Annual Avg
9.2°C
Summer Avg
21.9°C
Winter Avg
-4.5°C
Record High
40.5°C
Record Low
-39.6°C
Annual Precipitation
970.8 mm
Avg Humidity
79%
Summer Humidity
76%
Winter Humidity
86%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 15.6° | -6.1° | -39.6° | 42.2 | 87% | 53 | 60.7 |
| Feb | 18.5° | -4.5° | -27.9° | 48.4 | 84% | 72 | 69.3 |
| Mar | 26.5° | 2.3° | -24.4° | 62.6 | 79% | 111 | 64.4 |
| Apr | 28.8° | 8.8° | -7.8° | 94.8 | 76% | 142 | 60.9 |
| May | 32.9° | 15.1° | -2.7° | 115.9 | 77% | 169 | 59.7 |
| Jun | 36.9° | 20.6° | 2.2° | 118.5 | 77% | 184 | 55.9 |
| Jul | 40.5° | 23° | 8° | 100.4 | 76% | 193 | 36.3 |
| Aug | 38.3° | 22° | 6.6° | 104.2 | 75% | 168 | 35.8 |
| Sep | 34.3° | 18° | 1.2° | 86.7 | 75% | 135 | 48 |
| Oct | 30.5° | 10.4° | -8.8° | 84.9 | 76% | 92 | 54.9 |
| Nov | 23.2° | 3.4° | -15.5° | 56.7 | 81% | 59 | 59.3 |
| Dec | 19.9° | -3° | -28.8° | 55.5 | 87% | 45 | 64.4 |
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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