Costich Lake Weather Forecast
- 48
- 84
Mostly Sunny
- 48
- 85
Mostly Sunny
- 49
- 82
Mostly Sunny
- 39
- 68
Chance Rain
- 41
- 72
Mostly Sunny
- 46
- 80
Mostly Sunny
Today 18 Sep Kootenai/Cabinet Region
Mostly sunny. Highs in the 80s.
Tonight 18 Sep Kootenai/Cabinet Region
Mostly clear. Lows in the mid 40s to lower 50s.
Costich Lake Temperature Statistics
September Temperature
Kalispell, Glacier Park International Airport (52.8 miles)
Lowest 9 September, 2025
44.1 °FAverage September
66.1 °FHighest 2 September, 2025
93.2 °F
Climate (2020–Present)
Kalispell, Glacier Park International Airport (52.8 miles)
Average Low 2020–2025
33.1 °FAverage 2020–2025
45.2 °FAverage High 2020–2025
56.8 °F