Vandalia Municipal Reservoir

Best time to visit Vandalia Municipal Reservoir

Best months: April–June and September–October. Best months have typical highs of 55–85 °F, lows of 30 °F or warmer (32 °F where the station doesn't record snow), at most one snowy day and no more than 12 wet days.

1. Jan

   37° / 21°

   9 wet

2. Feb

   42° / 24°

   7 wet

3. Mar

   53° / 33°

   9 wet

4. Apr

   65° / 43°

   11 wet

5. May

   75° / 54°

   12 wet

6. Jun

   84° / 63°

   10 wet

7. Jul

   87° / 67°

   8 wet

8. Aug

   86° / 64°

   7 wet

9. Sep

   80° / 56°

   7 wet

10. Oct

    68° / 44°

    8 wet

11. Nov

    54° / 34°

    9 wet

12. Dec

    42° / 26°

    9 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Vandalia, IL, 4.7 mi away at 490 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.