Weather & Climate
Placer County, California, United States
Overview
Available climate summaries for Placer County. Origins and reference periods are unverified; stored values may include AI estimates. Treat these as estimates until independently verified.
Key Metrics
Annual Avg
11.5°C
Summer Avg
21.2°C
Winter Avg
3°C
Record High
40.2°C
Record Low
-17.2°C
Annual Precipitation
958.4 mm
Avg Humidity
59%
Summer Humidity
36%
Winter Humidity
78%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 19.7° | 3° | -12.4° | 138.3 | 78% | 73 | 39.6 |
| Feb | 20.6° | 3.5° | -17.2° | 151.8 | 78% | 89 | 33.6 |
| Mar | 22.5° | 5.5° | -10.1° | 153.1 | 79% | 136 | 30.9 |
| Apr | 25.5° | 8° | -7.6° | 85.5 | 74% | 174 | 30.4 |
| May | 34° | 12.7° | -2.5° | 49.3 | 65% | 219 | 27.1 |
| Jun | 38.4° | 18.2° | 0.7° | 12.9 | 48% | 249 | 22.2 |
| Jul | 40.2° | 23.2° | 5.9° | 3.7 | 32% | 257 | 19.2 |
| Aug | 38.5° | 22.3° | 5.8° | 4 | 28% | 230 | 19.2 |
| Sep | 38.9° | 18.9° | 0.2° | 9.9 | 34% | 178 | 26.4 |
| Oct | 34.3° | 13° | -3° | 55.5 | 46% | 131 | 29.9 |
| Nov | 26.7° | 6.8° | -13.2° | 104.4 | 63% | 81 | 31.9 |
| Dec | 19.2° | 2.6° | -16.1° | 190 | 77% | 61 | 34.9 |
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.