Post Lake Weather Forecast
- 26
- 44
Mostly Cloudy
- 28
- 38
Mostly Cloudy
- 26
- 44
Partly Sunny
- 23
- 51
Mostly Cloudy
- 26
- 44
Mostly Sunny
- 9
- 37
Partly Sunny
- 13
- 29
Mostly Sunny
Today 22 Dec Sully
Partly sunny. Highs in the mid 40s. Northwest Winds 5 to 10 Mph.
Tonight 22 Dec Sully
Mostly cloudy. Lows in the upper 20s. Northwest Winds 5 to 10 Mph.
Post Lake Temperature Statistics
December Temperature
Pierre, Pierre Regional Airport (24.9 miles)
Lowest 14 December, 2025
-9.9 °FAverage December
24.9 °FHighest 17 December, 2025
55 °F
Climate (2020–Present)
Pierre, Pierre Regional Airport (24.9 miles)
Average Low 2020–2025
37 °FAverage 2020–2025
48.7 °FAverage High 2020–2025
61.2 °F