South Glastonbury, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Glastonbury, a community in Park County, Montana.
Today
76°F
Patchy Smoke
Patchy smoke. Sunny. High near 76, with temperatures falling to around 73 in the afternoon. East northeast wind 2 to 14 mph.
7-day forecast for South Glastonbury
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Patchy Smoke | 2 to 14 mph ENE | 3% |
| Tonight | 48°F | Patchy Smoke | 3 to 14 mph W | 3% |
| Wednesday | 84°F | Sunny | 5 to 13 mph WNW | 0% |
| Wednesday Night | 51°F | Mostly Clear | 3 to 12 mph WSW | 0% |
| Thursday | 93°F | Sunny | 7 to 14 mph WSW | 0% |
| Thursday Night | 57°F | Mostly Clear | 3 to 12 mph SW | 0% |
| Friday | 97°F | Sunny | 6 to 15 mph SW | 0% |
| Friday Night | 58°F | Mostly Clear | 5 to 17 mph W | 0% |
| Saturday | 95°F | Sunny | 7 to 16 mph SW | 1% |
| Saturday Night | 58°F | Partly Cloudy | 3 to 12 mph WSW | 3% |
| Sunday | 92°F | Sunny | 5 to 14 mph WSW | 8% |
| Sunday Night | 57°F | Partly Cloudy | 3 to 13 mph W | 10% |
| Monday | 90°F | Sunny | 5 to 13 mph S | 6% |
| Monday Night | 56°F | Partly Cloudy | 5 to 14 mph N | 8% |
Forecast source: National Weather Service (api.weather.gov) for South Glastonbury (45.312, -110.808). Updated through the day.
Growing snapshot for South Glastonbury
Last spring frost
May 21
First fall frost
Sep 27
Growing season
128 days
Hardiness zone
5a
More local growing data for South Glastonbury: nearby ZIP 59027 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Clyde Park
Cooke City
Corwin Springs
Emigrant
Gardiner
Jardine
Livingston
Pine Creek
Pray
Sedan
Silver Gate
Springdale
Wilsall
Wineglass
Climate data from the nearest NOAA station, Gardiner, Mt (18.5 mi from South Glastonbury). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.