St. Xavier, MT Weather & Growing Conditions
Today
77°F
Patchy Smoke then Sunny
Patchy smoke before noon. Sunny. High near 77, with temperatures falling to around 75 in the afternoon. East southeast wind 2 to 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Patchy Smoke then Sunny | 2 to 9 mph ESE | 0% |
| Tonight | 51°F | Patchy Smoke then Mostly Clear | 5 to 10 mph E | 5% |
| Wednesday | 86°F | Sunny | 3 to 8 mph NW | 0% |
| Wednesday Night | 56°F | Mostly Clear | 5 to 8 mph S | 0% |
| Thursday | 95°F | Sunny | 2 to 9 mph W | 0% |
| Thursday Night | 61°F | Mostly Clear | 5 to 9 mph ENE | 0% |
| Friday | 99°F | Sunny | 3 to 7 mph NW | 0% |
| Friday Night | 64°F | Mostly Clear | 9 mph W | 0% |
| Saturday | 96°F | Sunny | 7 to 12 mph NW | 0% |
| Saturday Night | 64°F | Mostly Clear | 6 to 9 mph E | 0% |
| Sunday | 95°F | Sunny | 7 to 10 mph NNW | 0% |
| Sunday Night | 64°F | Partly Cloudy | 9 mph E | 5% |
| Monday | 92°F | Mostly Sunny | 7 to 12 mph N | 2% |
| Monday Night | 64°F | Partly Cloudy | 8 to 12 mph ENE | 12% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Xavier, MT
Last spring frost
May 7
First fall frost
Oct 5
Growing season
151 days
Hardiness zone
5a
Explore more for St. Xavier, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Yellowtail Dam, Mt (7.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.