Herrin Lakes Weather Forecast
- 44
- 73
Decreasing Clouds
- 48
- 78
Mostly Sunny
- 48
- 84
Slight Chance Thunderstorms
- 44
- 76
Sunny
- 50
- 85
Mostly Sunny
- 44
- 79
Chance Rain Showers
Today 27 May Upper Blackfoot and MacDonald Pass
Mostly cloudy. Highs 65 to 70. West Winds 5 to 15 Mph.
Tonight 27 May Upper Blackfoot and MacDonald Pass
Partly cloudy. Lows 45 to 50. North Winds up to 10 Mph.
Herrin Lakes Temperature Statistics
May Temperature
Helena Regional Airport (39.8 miles)
Lowest 6 May, 2025
34.6 °FAverage May
55.4 °FHighest 10 May, 2025
88.6 °F
Climate (2020–Present)
Helena Regional Airport (39.8 miles)
Average Low 2020–2025
36.1 °FAverage 2020–2025
47.5 °FAverage High 2020–2025
59.3 °F