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.
Overnight
30°F
Patchy Fog
Patchy fog. Mostly clear. Low around 30, with temperatures rising to around 32 overnight. Southwest wind around 2 mph.
7-day forecast for Pompeys Pillar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 30°F | Patchy Fog | 2 mph SW | 0% |
| Wednesday | 53°F | Patchy Fog then Sunny | 3 mph WNW | 0% |
| Wednesday Night | 31°F | Partly Cloudy then Patchy Fog | 2 mph SW | 0% |
| Thursday | 57°F | Patchy Fog then Mostly Sunny | 2 to 6 mph WSW | 1% |
| Thursday Night | 34°F | Mostly Cloudy | 3 mph W | 12% |
| Friday | 56°F | Sunny | 3 to 12 mph WSW | 0% |
| Friday Night | 37°F | Partly Cloudy | 5 to 8 mph SW | 0% |
| Saturday | 61°F | Sunny | 3 to 9 mph WSW | 0% |
| Saturday Night | 36°F | Mostly Clear | 3 mph SSW | 0% |
| Sunday | 67°F | Mostly Sunny | 2 to 8 mph WSW | 0% |
| Sunday Night | 39°F | Mostly Cloudy | 5 mph WNW | 0% |
| Monday | 59°F | Mostly Sunny | 3 mph W | 2% |
| Monday Night | 37°F | Partly Cloudy | 3 mph S | 2% |
| Tuesday | 63°F | Mostly Sunny | 3 to 7 mph WSW | 0% |
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 Nov 4, 2026.