Sinai, SD
Climate overview — based on NOAA 1991-2020 normals from ARLINGTON 1 W, SD US.
Year-round temperatures (°F)
Climate summary
Sinai has an annual average temperature of 44.7°F with about 26.2 inches of precipitation per year. The warmest month is July (average high 82.7°F), and the coldest is January (average low 5.3°F). June is typically the wettest month (4.10 in) and December the driest (0.58 in).
Best time to visit Sinai
Full guide →Climate change signal
All-time records →0 of 366 (0%) of Sinai'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.
| 1920s | 0 | |
| 1930s | 0 | |
| 1940s | 1 | |
| 1950s | 0 | |
| 1960s | 0 | |
| 1970s | 0 | |
| 1980s | 0 | |
| 1990s | 109 | |
| 2000s | 201 | |
| 2010s | 55 |
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 | 23.7°F | 5.3°F | 14.5°F | 0.79 in | — | 6 |
| February | 28.7°F | 9.6°F | 19.1°F | 0.76 in | — | 5 |
| March | 41.2°F | 21.2°F | 31.2°F | 1.38 in | — | 6 |
| April | 56.8°F | 33.0°F | 44.9°F | 2.60 in | — | 8 |
| May | 69.2°F | 46.1°F | 57.6°F | 3.97 in | — | 10 |
| June | 78.3°F | 56.7°F | 67.5°F | 4.10 in | — | 11 |
| July | 82.7°F | 60.7°F | 71.7°F | 3.19 in | — | 9 |
| August | 80.4°F | 58.6°F | 69.5°F | 3.08 in | — | 8 |
| September | 72.9°F | 50.0°F | 61.4°F | 2.55 in | — | 7 |
| October | 58.1°F | 36.4°F | 47.3°F | 2.15 in | — | 6 |
| November | 41.6°F | 22.9°F | 32.3°F | 1.09 in | — | 4 |
| December | 28.0°F | 11.1°F | 19.6°F | 0.58 in | — | 5 |
Climate twins of Sinai
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).