Castlewood, SD
Climate overview — based on NOAA 1991-2020 normals from CASTLEWOOD #2, SD US.
Year-round temperatures (°F)
Climate summary
Castlewood has an annual average temperature of 42.7°F with about 24.3 inches of precipitation per year. The warmest month is July (average high 82.5°F), and the coldest is January (average low 2.5°F). June is typically the wettest month (3.97 in) and January the driest (0.52 in).
Best time to visit Castlewood
Full guide →Climate change signal
All-time records →256 of 366 (69.9%) of Castlewood'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.
| 2010s | 208 | |
| 2020s | 158 |
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 | 21.5°F | 2.5°F | 12.0°F | 0.52 in | — | — |
| February | 26.2°F | 5.9°F | 16.1°F | 0.58 in | — | — |
| March | 38.7°F | 17.8°F | 28.3°F | 1.12 in | — | — |
| April | 54.1°F | 29.6°F | 41.9°F | 2.13 in | — | — |
| May | 67.3°F | 43.6°F | 55.5°F | 3.18 in | — | — |
| June | 77.5°F | 54.2°F | 65.9°F | 3.97 in | — | — |
| July | 82.5°F | 58.5°F | 70.5°F | 3.49 in | — | — |
| August | 80.5°F | 56.1°F | 68.3°F | 3.08 in | — | — |
| September | 72.4°F | 47.3°F | 59.9°F | 2.69 in | — | — |
| October | 57.8°F | 33.7°F | 45.8°F | 2.28 in | — | — |
| November | 41.0°F | 20.7°F | 30.9°F | 0.76 in | — | — |
| December | 26.9°F | 8.7°F | 17.8°F | 0.53 in | — | — |
Climate twins of Castlewood
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).