Johnstown Weather Forecast
- 45
- 73
Decreasing Clouds
- 38
- 64
Chance Rain Showers
- 45
- 75
Mostly Sunny
- 49
- 86
Breezy
- 50
- 83
Mostly Sunny
- 50
- 86
Partly Sunny
- 49
- 83
Mostly Sunny
Today 8 May Wind River Basin
Partly cloudy. Highs in the upper 60s. West Winds around 10 Mph.
Tonight 8 May Wind River Basin
Mostly cloudy. Lows in the mid 40s. Northwest Winds around 10 Mph.
Johnstown Temperature Statistics
May Temperature
Riverton Regional Airport (13 miles)
Lowest 6 May, 2026
25 °FAverage May
48.7 °FHighest 3 May, 2026
74.6 °F
Climate (2021–Present)
Riverton Regional Airport (13 miles)
Average Low 2021–2026
33.6 °FAverage 2021–2026
46.5 °FAverage High 2021–2026
59.4 °F