Sisters, OR
Climate overview — based on NOAA 1991-2020 normals from SISTERS, OR US.
Year-round temperatures (°F)
Climate summary
Sisters has an annual average temperature of 45.5°F with about 15.2 inches of precipitation per year. The warmest month is July (average high 85.6°F), and the coldest is December (average low 19.8°F). December is typically the wettest month (2.53 in) and September the driest (0.54 in).
Best time to visit Sisters
Full guide →Climate change signal
All-time records →36 of 366 (9.8%) of Sisters's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1950s | 15 | |
| 1960s | 72 | |
| 1970s | 50 | |
| 1980s | 66 | |
| 1990s | 65 | |
| 2000s | 50 | |
| 2010s | 40 | |
| 2020s | 8 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 40.8°F | 20.8°F | 30.8°F | 1.74 in | — | — |
| February | 43.9°F | 21.9°F | 32.9°F | 1.36 in | — | — |
| March | 50.6°F | 25.2°F | 37.9°F | 1.31 in | — | — |
| April | 57.1°F | 28.8°F | 43.0°F | 0.77 in | — | — |
| May | 66.3°F | 34.4°F | 50.4°F | 1.53 in | — | — |
| June | 74.2°F | 39.0°F | 56.6°F | 1.01 in | — | — |
| July | 85.6°F | 43.4°F | 64.5°F | 0.55 in | — | — |
| August | 84.5°F | 42.4°F | 63.5°F | 0.60 in | — | — |
| September | 75.8°F | 36.0°F | 55.9°F | 0.54 in | — | — |
| October | 61.3°F | 28.6°F | 44.9°F | 1.09 in | — | — |
| November | 47.4°F | 24.5°F | 35.9°F | 2.17 in | — | — |
| December | 39.3°F | 19.8°F | 29.6°F | 2.53 in | — | — |
Climate twins of Sisters
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).