Weather & Climate
Janesville, California, United States
Overview
Available climate summaries for Janesville. Origins and reference periods are unverified; stored values may include AI estimates. Treat these as estimates until independently verified.
Key Metrics
Annual Avg
8.7°C
Summer Avg
19.9°C
Winter Avg
-1.3°C
Record High
40.9°C
Record Low
-22.2°C
Annual Precipitation
532.3 mm
Avg Humidity
59%
Summer Humidity
37%
Winter Humidity
82%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 14.9° | -1.8° | -22.2° | 71.3 | 84% | 69 | 41.3 |
| Feb | 18.3° | -0.2° | -19.2° | 78.7 | 78% | 88 | 41.6 |
| Mar | 21.5° | 2.9° | -12° | 78.7 | 74% | 137 | 38.6 |
| Apr | 25.2° | 5.9° | -8.8° | 46.2 | 68% | 175 | 41.4 |
| May | 31.7° | 11.2° | -6° | 35.6 | 60% | 217 | 35.7 |
| Jun | 36.3° | 16.6° | -2° | 13.8 | 48% | 242 | 31.6 |
| Jul | 40.9° | 22.1° | 3.5° | 5.9 | 33% | 252 | 26.2 |
| Aug | 37.7° | 21° | 4° | 5.3 | 29% | 224 | 27.2 |
| Sep | 36.5° | 16.5° | -3.6° | 9 | 34% | 174 | 34.2 |
| Oct | 31.6° | 9.2° | -7.5° | 31.6 | 51% | 126 | 41.3 |
| Nov | 22.6° | 2.4° | -17.6° | 56.1 | 70% | 77 | 35.8 |
| Dec | 13.1° | -1.8° | -19.3° | 100.1 | 83% | 57 | 42.3 |
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 2026-03-22.