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Montana: first snow, freeze dates and white Christmas odds
Snow and freeze history for 8 NOAA weather stations in Montana, computed from 1995–2024 daily records. The earliest typical first snow among them is Great Falls (median Oct 11). The best white Christmas odds are at Missoula (63%).
| City | First measurable snow (median) | First 1"+ snow (median) | White Christmas chance | Avg snowfall / season | First fall freeze (median) | Last spring freeze (median) |
|---|---|---|---|---|---|---|
| Billings | Oct 19 | Oct 27 | 47% | 57.9" | Oct 8 | May 6 |
| Bozeman | – | – | – | – | Sep 14 | May 31 |
| Glasgow | Oct 23 | Nov 8 | 60% | 41.3" | Sep 28 | May 13 |
| Great Falls | Oct 11 | Oct 19 | 43% | 66.9" | Sep 21 | May 22 |
| Havre | Oct 27 | Nov 8 | 46% | 40.4" | Sep 23 | May 19 |
| Helena | Nov 2 | Nov 5 | – | 38.3" | Oct 1 | May 13 |
| Missoula | Nov 4 | Nov 13 | 63% | 44.2" | Sep 26 | May 13 |
| St. Marie | – | – | – | – | Sep 26 | May 15 |
Planning for winter? Heat pump vs gas furnace, propane and oil: heating cost in Montana (on our sister site PlugVsPump, from EIA prices).