St. Xavier, MT Weather & Growing Conditions
Tonight
55°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. Low around 55, with temperatures rising to around 57 overnight. North northwest wind 6 to 9 mph. Chance of precipitation is 90%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Showers And Thunderstorms | 6 to 9 mph NNW | 85% |
| Saturday | 63°F | Showers And Thunderstorms | 6 to 13 mph NNW | 92% |
| Saturday Night | 50°F | Showers And Thunderstorms | 13 to 17 mph NW | 88% |
| Sunday | 63°F | Rain Showers | 10 to 17 mph WNW | 75% |
| Sunday Night | 48°F | Chance Rain Showers then Mostly Cloudy | 3 to 7 mph W | 27% |
| Monday | 72°F | Mostly Sunny | 2 to 6 mph SE | 1% |
| Monday Night | 48°F | Mostly Clear | 7 mph SSE | 0% |
| Tuesday | 78°F | Sunny | 2 to 6 mph NNE | 0% |
| Tuesday Night | 52°F | Partly Cloudy | 5 mph SSE | 10% |
| Wednesday | 79°F | Mostly Sunny | 6 mph WNW | 5% |
| Wednesday Night | 52°F | Mostly Clear | 3 to 7 mph S | 6% |
| Thursday | 81°F | Sunny | 6 mph SE | 1% |
| Thursday Night | 52°F | Partly Cloudy | 7 mph SSE | 1% |
| Friday | 81°F | Mostly Sunny | 6 mph SW | 3% |
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 Sep 19, 2026.