Interior, SD
Climate overview — based on NOAA 1991-2020 normals from INTERIOR 3 NE, SD US.
Year-round temperatures (°F)
Climate summary
Interior has an annual average temperature of 50.4°F with about 19.6 inches of precipitation per year and 38 inches of snow. The warmest month is July (average high 91.2°F), and the coldest is January (average low 14.2°F). May is typically the wettest month (3.62 in) and January the driest (0.46 in). Snow typically falls from October through May.
Best time to visit Interior
Full guide →Climate change signal
All-time records →69 of 366 (18.9%) of Interior'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 | 30 | |
| 1960s | 60 | |
| 1970s | 38 | |
| 1980s | 49 | |
| 1990s | 51 | |
| 2000s | 50 | |
| 2010s | 42 | |
| 2020s | 46 |
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 | 37.1°F | 14.2°F | 25.7°F | 0.46 in | 5.5 in | 4 |
| February | 40.8°F | 16.2°F | 28.5°F | 0.55 in | 6.4 in | 5 |
| March | 52.5°F | 25.8°F | 39.1°F | 1.16 in | 5.9 in | 6 |
| April | 62.2°F | 34.7°F | 48.4°F | 2.26 in | 6.4 in | 9 |
| May | 72.1°F | 45.7°F | 58.9°F | 3.62 in | 0.5 in | 10 |
| June | 82.7°F | 55.7°F | 69.2°F | 3.46 in | — | 10 |
| July | 91.2°F | 62.3°F | 76.8°F | 2.23 in | — | 8 |
| August | 90.5°F | 60.2°F | 75.3°F | 1.81 in | — | 7 |
| September | 81.8°F | 50.5°F | 66.2°F | 1.39 in | — | 6 |
| October | 65.4°F | 37.8°F | 51.6°F | 1.59 in | 1.9 in | 7 |
| November | 50.0°F | 25.2°F | 37.6°F | 0.53 in | 3.7 in | 4 |
| December | 39.0°F | 16.6°F | 27.8°F | 0.54 in | 7.7 in | 5 |
Climate twins of Interior
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).