South Glastonbury, MT Weather & Growing Conditions
Overnight
45°F
Scattered Showers And Thunderstorms
Scattered showers and thunderstorms. Mostly cloudy. Low around 45, with temperatures rising to around 47 overnight. Southwest wind around 3 mph. Chance of precipitation is 50%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 45°F | Scattered Showers And Thunderstorms | 3 mph SW | 45% |
| Saturday | 47°F | Patchy Fog | 2 to 8 mph NNW | 81% |
| Saturday Night | 40°F | Rain Showers Likely | 2 to 8 mph N | 58% |
| Sunday | 53°F | Chance Rain Showers then Partly Sunny | 2 to 8 mph NW | 35% |
| Sunday Night | 38°F | Partly Cloudy | 7 mph S | 1% |
| Monday | 62°F | Sunny | 9 mph SSW | 1% |
| Monday Night | 42°F | Mostly Clear | 8 mph SW | 0% |
| Tuesday | 64°F | Sunny | 9 mph SSW | 0% |
| Tuesday Night | 43°F | Partly Cloudy | 8 mph SW | 4% |
| Wednesday | 65°F | Mostly Sunny | 10 mph SSW | 9% |
| Wednesday Night | 44°F | Mostly Clear | 7 to 13 mph SSW | 3% |
| Thursday | 66°F | Sunny | 12 mph S | 3% |
| Thursday Night | 45°F | Mostly Clear | 8 to 13 mph S | 0% |
| Friday | 66°F | Mostly Sunny | 13 mph SSW | 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 Sep 19, 2026.