Castalia, OH
Climate overview — based on NOAA 1991-2020 normals from SANDUSKY, OH US.
Year-round temperatures (°F)
Climate summary
Castalia has an annual average temperature of 52°F with about 34 inches of precipitation per year. The warmest month is July (average high 82.3°F), and the coldest is January (average low 21.8°F). April is typically the wettest month (3.76 in) and February the driest (1.77 in).
Best time to visit Castalia
Full guide →Climate change signal
All-time records →35 of 366 (9.6%) of Castalia'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.
| 1930s | 45 | |
| 1940s | 70 | |
| 1950s | 69 | |
| 1960s | 32 | |
| 1970s | 27 | |
| 1980s | 29 | |
| 1990s | 28 | |
| 2000s | 22 | |
| 2010s | 33 | |
| 2020s | 11 |
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 | 34.4°F | 21.8°F | 28.1°F | 1.90 in | — | 11 |
| February | 37.0°F | 23.4°F | 30.2°F | 1.77 in | — | 10 |
| March | 45.0°F | 30.9°F | 38.0°F | 2.56 in | — | 12 |
| April | 57.3°F | 41.3°F | 49.3°F | 3.76 in | — | 13 |
| May | 68.5°F | 53.2°F | 60.8°F | 3.25 in | — | 13 |
| June | 78.1°F | 63.4°F | 70.8°F | 3.67 in | — | 12 |
| July | 82.3°F | 67.2°F | 74.7°F | 3.55 in | — | 10 |
| August | 80.5°F | 65.8°F | 73.2°F | 3.02 in | — | 10 |
| September | 74.5°F | 58.9°F | 66.7°F | 3.07 in | — | 10 |
| October | 63.0°F | 47.6°F | 55.3°F | 2.72 in | — | 12 |
| November | 50.1°F | 36.8°F | 43.5°F | 2.64 in | — | 11 |
| December | 39.3°F | 27.8°F | 33.6°F | 2.12 in | — | 12 |
Climate twins of Castalia
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).