South Glastonbury, MT Weather & Growing Conditions
This Afternoon
44°F
Sunny
Sunny. High near 44, with temperatures falling to around 38 in the afternoon. Southeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 44°F | Sunny | 5 mph SE | 0% |
| Tonight | 25°F | Partly Cloudy | 5 to 8 mph ESE | 0% |
| Wednesday | 45°F | Mostly Sunny | 2 to 6 mph NE | 0% |
| Wednesday Night | 26°F | Mostly Clear | 2 to 14 mph ESE | 0% |
| Thursday | 42°F | Mostly Sunny | 9 to 15 mph S | 14% |
| Thursday Night | 25°F | Partly Cloudy | 10 mph S | 14% |
| Friday | 41°F | Sunny | 10 to 14 mph S | 9% |
| Friday Night | 26°F | Partly Cloudy | 10 to 16 mph S | 9% |
| Saturday | 46°F | Sunny | 9 to 13 mph S | 1% |
| Saturday Night | 30°F | Partly Cloudy | 9 to 17 mph S | 0% |
| Sunday | 50°F | Mostly Sunny | 15 to 21 mph S | 0% |
| Sunday Night | 32°F | Partly Cloudy | 12 to 17 mph S | 0% |
| Monday | 48°F | Mostly Sunny | 12 mph S | 3% |
| Monday Night | 34°F | Partly Cloudy | 13 mph S | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for South Glastonbury, MT
Last spring frost
May 19
First fall frost
Sep 25
Growing season
125 days
Hardiness zone
5a
Explore more for South Glastonbury, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Livingston 12 S, Mt (16.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.