Helena Valley Regulating Reservoir Weather Forecast
- 36
- 66
Mostly Sunny
- 42
- 78
Becoming Sunny
- 45
- 81
Mostly Sunny
- 38
- 73
Rain Showers
- 33
- 55
Chance Rain Showers
- 39
- 68
Mostly Sunny
- 45
- 77
Mostly Sunny
Today 1 May Helena Valley
Partly cloudy in the morning then clearing. Highs in the mid 60s. North Winds up to 5 Mph.
Tonight 1 May Helena Valley
Mostly clear. Lows 35 to 40. Northeast Winds up to 5 Mph shifting to the south after midnight.
Helena Valley Regulating Reservoir Temperature Statistics
May Temperature
Helena Regional Airport (5.6 miles)
Lowest
–Average May
–Highest
–
Climate (2020–Present)
Helena Regional Airport (5.6 miles)
Average Low 2020–2025
36.1 °FAverage 2020–2025
47.4 °FAverage High 2020–2025
59.2 °F