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Weather & Climate
Sisters, Oregon, United States
Overview
Climate data and monthly weather averages for Sisters.
Key Metrics
Annual Avg
8.7°C
Summer Avg
18.1°C
Winter Avg
0.2°C
Record High
39.6°C
Record Low
-22°C
Annual Precipitation
601.7 mm
Avg Humidity
70%
Summer Humidity
58%
Winter Humidity
83%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 18.6° | 0.1° | -22° | 74.4 | 85% | 47 | 42.4 |
| Feb | 18.4° | 1.2° | -15.7° | 62.2 | 79% | 69 | 47.1 |
| Mar | 25.1° | 4° | -16.8° | 64.5 | 74% | 111 | 42.7 |
| Apr | 28.8° | 6.9° | -5.6° | 57.3 | 69% | 151 | 45.5 |
| May | 34.5° | 11.8° | -3.2° | 46.8 | 65% | 191 | 40.9 |
| Jun | 37.7° | 15.2° | 0.3° | 33 | 63% | 213 | 35.2 |
| Jul | 39.6° | 19.9° | 4.2° | 7.1 | 56% | 239 | 30.8 |
| Aug | 38.9° | 19.2° | 4.3° | 11.5 | 55% | 203 | 30.7 |
| Sep | 36.8° | 15.1° | -0.9° | 23.4 | 58% | 147 | 35.6 |
| Oct | 31.1° | 8.9° | -8.4° | 51.8 | 68% | 97 | 45.7 |
| Nov | 22.3° | 3.1° | -16.2° | 71.7 | 80% | 53 | 46 |
| Dec | 14.3° | -0.6° | -21.2° | 98 | 86% | 39 | 44.5 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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