Tongue River Reservoir Weather Forecast
- 40
- 65
Rain Showers Likely
- 42
- 75
Chance Thunderstorms
- 42
- 78
Partly Sunny
- 43
- 78
Partly Sunny
- 44
- 78
Chance Thunderstorms
- 45
- 81
Mostly Sunny
Today 31 May Southern Big Horn
Decreasing Clouds. Rain Showers likely early in the Morning, then chance of rain Showers in the late morning and afternoon. Slight chance of Thunderstorms late in the afternoon. Highs in the mid 60s. Northwest Winds 15 to 25 Mph. Chance of precipitation 70 percent.
Tonight 31 May Southern Big Horn
Decreasing Clouds. A 20 percent chance of rain Showers early in the evening. Lows in the lower 40s. West Winds 5 to 15 Mph.
Tongue River Reservoir Temperature Statistics
May Temperature
Sheridan County Airport (24.9 miles)
Lowest 6 May, 2026
16.6 °FAverage May
52.8 °FHighest 13 May, 2026
95.6 °F
Climate (2021–Present)
Sheridan County Airport (24.9 miles)
Average Low 2021–2026
33.5 °FAverage 2021–2026
47.7 °FAverage High 2021–2026
62.3 °F