South Glastonbury, MT Weather & Growing Conditions
Overnight
44°F
Patchy Smoke
Patchy smoke. Mostly clear, with a low around 44. North wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 44°F | Patchy Smoke | 1 mph N | 0% |
| Tuesday | 72°F | Patchy Smoke | 1 to 10 mph E | 2% |
| Tuesday Night | 49°F | Patchy Smoke | 3 to 12 mph NW | 3% |
| Wednesday | 79°F | Sunny | 6 to 9 mph WSW | 0% |
| Wednesday Night | 53°F | Mostly Clear | 3 to 9 mph WSW | 0% |
| Thursday | 85°F | Sunny | 8 to 13 mph WSW | 0% |
| Thursday Night | 59°F | Mostly Clear | 5 to 12 mph WSW | 0% |
| Friday | 89°F | Sunny | 8 to 15 mph SW | 0% |
| Friday Night | 60°F | Mostly Clear | 6 to 16 mph W | 0% |
| Saturday | 88°F | Sunny | 7 to 17 mph SW | 2% |
| Saturday Night | 60°F | Partly Cloudy | 5 to 14 mph W | 3% |
| Sunday | 86°F | Sunny | 5 to 14 mph WSW | 6% |
| Sunday Night | 59°F | Partly Cloudy | 5 to 13 mph W | 9% |
| Monday | 85°F | Sunny | 6 to 12 mph WNW | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for South Glastonbury, MT
Last spring frost
May 21
First fall frost
Sep 27
Growing season
128 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, Gardiner, Mt (18.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.