Roy, WA
Climate overview — based on NOAA 1991-2020 normals from MCMILLIN RSVR, WA US.
Year-round temperatures (°F)
Climate summary
Roy has an annual average temperature of 50.5°F with about 45.1 inches of precipitation per year and 5.6 inches of snow. The warmest month is August (average high 76.5°F), and the coldest is December (average low 32.9°F). November is typically the wettest month (7.06 in) and August the driest (0.90 in). Snow typically falls from November through March.
Best time to visit Roy
Full guide →Climate change signal
All-time records →42 of 366 (11.5%) of Roy'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.
| 1940s | 66 | |
| 1950s | 45 | |
| 1960s | 54 | |
| 1970s | 28 | |
| 1980s | 52 | |
| 1990s | 39 | |
| 2000s | 33 | |
| 2010s | 29 | |
| 2020s | 20 |
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 | 46.1°F | 33.3°F | 39.7°F | 6.12 in | 1.5 in | 20 |
| February | 48.0°F | 33.1°F | 40.6°F | 4.33 in | 0.5 in | 15 |
| March | 52.4°F | 35.7°F | 44.0°F | 4.80 in | 0.6 in | 20 |
| April | 57.3°F | 38.7°F | 48.0°F | 3.90 in | — | 16 |
| May | 64.3°F | 44.5°F | 54.4°F | 2.97 in | — | 13 |
| June | 69.0°F | 49.0°F | 59.0°F | 2.28 in | — | 11 |
| July | 75.7°F | 52.4°F | 64.0°F | 0.92 in | — | 5 |
| August | 76.5°F | 52.6°F | 64.5°F | 0.90 in | — | 5 |
| September | 69.6°F | 48.2°F | 58.9°F | 1.78 in | — | 8 |
| October | 59.1°F | 41.7°F | 50.4°F | 4.08 in | — | 15 |
| November | 50.3°F | 36.1°F | 43.2°F | 7.06 in | 1.5 in | 19 |
| December | 45.0°F | 32.9°F | 39.0°F | 5.99 in | 1.5 in | 20 |
Climate twins of Roy
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).