Pompeys Pillar, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Pompeys Pillar, a community in Big Horn County, Montana.
Today
78°F
Sunny
Sunny, with a high near 78. Northeast wind around 3 mph.
7-day forecast for Pompeys Pillar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Sunny | 3 mph NE | 0% |
| Tonight | 53°F | Partly Cloudy | 1 to 7 mph E | 1% |
| Wednesday | 88°F | Sunny | 1 to 7 mph W | 0% |
| Wednesday Night | 57°F | Mostly Clear | 1 to 6 mph N | 0% |
| Thursday | 94°F | Sunny | 1 to 8 mph W | 0% |
| Thursday Night | 61°F | Mostly Clear | 2 to 8 mph NE | 0% |
| Friday | 100°F | Sunny | 2 to 6 mph W | 0% |
| Friday Night | 64°F | Partly Cloudy | 5 to 9 mph N | 0% |
| Saturday | 98°F | Sunny | 6 to 12 mph NW | 0% |
| Saturday Night | 65°F | Partly Cloudy | 3 to 10 mph NE | 1% |
| Sunday | 95°F | Mostly Sunny | 3 to 9 mph N | 0% |
| Sunday Night | 66°F | Partly Cloudy | 9 mph NE | 8% |
| Monday | 93°F | Mostly Sunny | 6 to 12 mph NNE | 3% |
| Monday Night | 66°F | Partly Cloudy | 9 to 13 mph ENE | 8% |
Forecast source: National Weather Service (api.weather.gov) for Pompeys Pillar (45.991, -107.950). Updated through the day.
Growing snapshot for Pompeys Pillar
Last spring frost
May 13
First fall frost
Sep 29
Growing season
135 days
Hardiness zone
4b
More local growing data for Pompeys Pillar: nearby ZIP 59064 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Hardin, Mt (16.2 mi from Pompeys Pillar). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.