Mount Vernon, SD
Climate overview — based on NOAA 1991-2020 normals from MITCHELL MUNI AP, SD US.
Year-round temperatures (°F)
Climate summary
Mount Vernon has an annual average temperature of 47.7°F with about 21.1 inches of precipitation per year. The warmest month is July (average high 86.7°F), and the coldest is January (average low 9.3°F). June is typically the wettest month (3.51 in) and February the driest (0.37 in).
Best time to visit Mount Vernon
Full guide →Climate change signal
All-time records →158 of 366 (43.2%) of Mount Vernon'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.
| 1990s | 10 | |
| 2000s | 131 | |
| 2010s | 116 | |
| 2020s | 109 |
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 | 28.6°F | 9.3°F | 19.0°F | 0.40 in | — | 4 |
| February | 32.7°F | 13.4°F | 23.0°F | 0.37 in | — | 4 |
| March | 45.4°F | 24.3°F | 34.8°F | 0.93 in | — | 6 |
| April | 58.7°F | 35.1°F | 46.9°F | 2.07 in | — | 9 |
| May | 70.8°F | 47.8°F | 59.3°F | 3.15 in | — | 11 |
| June | 81.2°F | 58.5°F | 69.9°F | 3.51 in | — | 11 |
| July | 86.7°F | 63.9°F | 75.3°F | 2.36 in | — | 8 |
| August | 83.9°F | 60.5°F | 72.2°F | 3.14 in | — | 9 |
| September | 76.8°F | 51.0°F | 63.9°F | 2.34 in | — | 7 |
| October | 61.7°F | 37.8°F | 49.7°F | 1.83 in | — | 7 |
| November | 45.6°F | 24.2°F | 34.9°F | 0.55 in | — | 4 |
| December | 31.9°F | 14.1°F | 23.0°F | 0.49 in | — | 5 |
Climate twins of Mount Vernon
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).