Pompeys Pillar, MT Weather & Growing Conditions
Overnight
30°F
Clear
Clear. Low around 30, with temperatures rising to around 32 overnight. Southwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 30°F | Clear | 2 mph SW | 0% |
| Wednesday | 50°F | Sunny | 3 mph WNW | 0% |
| Wednesday Night | 30°F | Partly Cloudy | 3 mph SE | 0% |
| Thursday | 54°F | Mostly Sunny | 5 mph WSW | 1% |
| Thursday Night | 35°F | Mostly Cloudy | 2 to 7 mph W | 12% |
| Friday | 53°F | Sunny | 5 to 9 mph WSW | 0% |
| Friday Night | 36°F | Partly Cloudy | 5 to 12 mph SW | 0% |
| Saturday | 58°F | Sunny | 3 to 12 mph WSW | 0% |
| Saturday Night | 35°F | Mostly Clear | 5 mph SSW | 0% |
| Sunday | 64°F | Mostly Sunny | 3 to 7 mph WSW | 0% |
| Sunday Night | 39°F | Mostly Cloudy | 3 to 7 mph WNW | 0% |
| Monday | 56°F | Mostly Sunny | 5 mph W | 2% |
| Monday Night | 36°F | Partly Cloudy | 5 mph S | 2% |
| Tuesday | 59°F | Mostly Sunny | 7 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Pompeys Pillar, MT
Last spring frost
May 13
First fall frost
Sep 29
Growing season
135 days
Hardiness zone
4b
Explore more for Pompeys Pillar, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Hardin, Mt (16.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.