Pompeys Pillar, MT Weather & Growing Conditions
This Afternoon
59°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy, with a high near 59. North wind around 13 mph. Chance of precipitation is 100%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 59°F | Showers And Thunderstorms | 13 mph N | 98% |
| Tonight | 51°F | Showers And Thunderstorms | 15 mph NNE | 97% |
| Sunday | 59°F | Rain Showers | 7 to 12 mph N | 87% |
| Sunday Night | 49°F | Patchy Fog | 2 to 6 mph ENE | 21% |
| Monday | 68°F | Patchy Fog then Partly Sunny | 2 to 6 mph SSE | 1% |
| Monday Night | 47°F | Mostly Clear | 6 mph SE | 0% |
| Tuesday | 75°F | Sunny | 5 mph S | 0% |
| Tuesday Night | 52°F | Partly Cloudy | 5 mph SE | 7% |
| Wednesday | 77°F | Partly Sunny | 3 to 7 mph WSW | 8% |
| Wednesday Night | 52°F | Mostly Clear | 5 mph S | 5% |
| Thursday | 79°F | Sunny | 7 mph SSW | 2% |
| Thursday Night | 52°F | Mostly Clear | 6 mph ESE | 1% |
| Friday | 78°F | Mostly Sunny | 6 mph SSE | 0% |
| Friday Night | 52°F | Partly Cloudy | 5 to 8 mph SSE | 4% |
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 Sep 19, 2026.