Rock Spring Reservoir Weather Forecast
- 45
- 72
Mostly Sunny
- 48
- 75
Partly Sunny
- 50
- 78
Mostly Sunny
- 46
- 78
Mostly Sunny
- 41
- 64
Slight Chance Thunderstorms
- 44
- 72
Mostly Sunny
Today 18 Sep Natrona County Lower Elevations
Mostly sunny. Highs around 70. West Winds around 10 Mph.
Tonight 18 Sep Natrona County Lower Elevations
Partly cloudy. Lows in the lower 40s.
Rock Spring Reservoir Temperature Statistics
September Temperature
Casper, Natrona County International Airport (34.8 miles)
Lowest 6 September, 2025
37.9 °FAverage September
65.5 °FHighest 10 September, 2025
90 °F
Climate (2020–Present)
Casper, Natrona County International Airport (34.8 miles)
Average Low 2020–2025
32.6 °FAverage 2020–2025
46.7 °FAverage High 2020–2025
60.3 °F