Flathead Valley Weather
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Period of Record Monthly Climate Summary
Period of Record : 7/ 1/1948 to 2/28/1982
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Average Max. Temperature (F) | 29.1 | 37.3 | 44.2 | 56.1 | 66.3 | 74.1 | 81.9 | 80.7 | 69.6 | 55.6 | 40.6 | 32.2 | 55.6 |
| Average Min. Temperature (F) | 14.4 | 20.8 | 23.8 | 32.3 | 40.0 | 46.3 | 50.2 | 49.3 | 41.3 | 33.0 | 25.6 | 19.3 | 33.0 |
| Average Total Precipitation (in.) | 1.39 | 0.96 | 0.88 | 0.99 | 1.69 | 1.99 | 1.13 | 1.57 | 1.06 | 1.04 | 1.14 | 1.38 | 15.21 |
| Average Total Snow Fall (in.) | 16.5 | 9.4 | 6.3 | 1.5 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.9 | 7.4 | 16.6 | 58.8 |
| Average Snow Depth (in.) | 7 | 7 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 2 |
Polson, Montana
Period of Record Monthly Climate Summary for
Period of Record : 7/ 1/1906 to 7/31/2003
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| Average Max. Temperature (F) | 31.4 | 36.4 | 45.0 | 56.0 | 65.0 | 72.8 | 82.1 | 80.7 | 68.8 | 56.4 | 41.6 | 34.0 | 55.8 |
| Average Min. Temperature (F) | 19.2 | 21.9 | 27.2 | 34.3 | 40.8 | 47.7 | 53.0 | 52.1 | 44.2 | 36.1 | 27.8 | 22.5 | 35.6 |
| Average Total Precipitation (in.) | 1.02 | 0.87 | 0.96 | 1.23 | 1.92 | 2.26 | 1.05 | 1.10 | 1.36 | 1.16 | 1.21 | 1.17 | 15.31 |
| Average Total Snow Fall (in.) | 8.5 | 4.0 | 2.6 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 2.9 | 6.6 | 25.3 |
| Average Snow Depth (in.) | 5 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 1 |
