St. Xavier, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Xavier, a community in Big Horn County, Montana.
This Afternoon
52°F
Mostly Sunny
Mostly sunny. High near 52, with temperatures falling to around 46 in the afternoon. East wind around 3 mph.
7-day forecast for St. Xavier
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 52°F | Mostly Sunny | 3 mph E | 0% |
| Tonight | 30°F | Patchy Fog | 5 mph S | 0% |
| Thursday | 55°F | Patchy Fog then Sunny | 5 mph SE | 0% |
| Thursday Night | 33°F | Mostly Cloudy | 2 to 7 mph SW | 10% |
| Friday | 56°F | Sunny | 1 to 5 mph SSW | 0% |
| Friday Night | 34°F | Mostly Clear | 7 mph S | 0% |
| Saturday | 62°F | Sunny | 5 mph SW | 0% |
| Saturday Night | 34°F | Mostly Clear | 3 to 7 mph S | 0% |
| Sunday | 67°F | Mostly Sunny | 5 mph SW | 0% |
| Sunday Night | 36°F | Mostly Cloudy | 5 mph SSW | 0% |
| Monday | 60°F | Mostly Sunny | 5 mph ESE | 1% |
| Monday Night | 35°F | Mostly Cloudy | 5 mph SSE | 0% |
| Tuesday | 62°F | Mostly Sunny | 3 mph SW | 1% |
| Tuesday Night | 37°F | Partly Cloudy | 5 mph SSW | 1% |
Forecast source: National Weather Service (api.weather.gov) for St. Xavier (45.457, -107.725). Updated through the day.
Growing snapshot for St. Xavier
Last spring frost
May 7
First fall frost
Oct 5
Growing season
151 days
Hardiness zone
5a
More local growing data for St. Xavier: nearby ZIP 59075 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Yellowtail Dam, Mt (7.8 mi from St. Xavier). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.