Tongue River Reservoir State Park Weather Forecast
- 45
- 68
Slight Chance Thunderstorms
- 45
- 74
Mostly Sunny
- 47
- 75
Chance Rain Showers
- 46
- 74
Chance Rain Showers
- 49
- 78
Mostly Sunny
- 52
- 82
Slight Chance Thunderstorms
- 53
- 85
Mostly Sunny
Today 25 May Southern Big Horn
Mostly sunny. Chance of Showers and slight chance of Thunderstorms early in the Afternoon, then slight chance of Showers and Thunderstorms late in the afternoon. Highs around 70. Southeast Winds 5 to 15 Mph. Chance of precipitation 30 percent.
Tonight 25 May Southern Big Horn
Mostly clear. Patchy fog overnight. Lows in the mid 40s. Southeast Winds 5 to 15 Mph.
Tongue River Reservoir State Park Temperature Statistics
May Temperature
Sheridan County Airport (25.5 miles)
Lowest 7 May, 2025
28.9 °FAverage May
53.8 °FHighest 12 May, 2025
86.6 °F
Climate (2020–Present)
Sheridan County Airport (25.5 miles)
Average Low 2020–2025
33.2 °FAverage 2020–2025
47.2 °FAverage High 2020–2025
61.6 °F