Casper Mountain, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Casper Mountain, a community in Natrona County, Wyoming.
Tonight
49°F
Partly Cloudy then Isolated Showers And Thunderstorms
Isolated showers and thunderstorms between midnight and 2am. Partly cloudy, with a low around 49. Southwest wind around 7 mph.
7-day forecast for Casper Mountain
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Partly Cloudy then Isolated Showers And Thunderstorms | 7 mph SW | 13% |
| Saturday | 61°F | Mostly Sunny then Scattered Showers And Thunderstorms | 9 mph WSW | 25% |
| Saturday Night | 43°F | Isolated Showers And Thunderstorms then Showers And Thunderstorms Likely | 8 mph WSW | 68% |
| Sunday | 49°F | Showers And Thunderstorms Likely | 10 mph W | 67% |
| Sunday Night | 41°F | Partly Cloudy | 2 to 7 mph WNW | 9% |
| Monday | 56°F | Sunny | 5 mph SW | 0% |
| Monday Night | 45°F | Mostly Clear | 8 mph SE | 0% |
| Tuesday | 64°F | Sunny | 7 mph SW | 1% |
| Tuesday Night | 49°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 8 mph SSE | 13% |
| Wednesday | 64°F | Mostly Sunny | 10 mph SW | 9% |
| Wednesday Night | 49°F | Mostly Clear | 6 mph SSW | 5% |
| Thursday | 65°F | Mostly Sunny | 7 mph SW | 5% |
| Thursday Night | 50°F | Partly Cloudy | 6 to 9 mph SE | 11% |
| Friday | 67°F | Mostly Sunny | 9 mph SW | 8% |
Forecast source: National Weather Service (api.weather.gov) for Casper Mountain (42.742, -106.308). Updated through the day.
Growing snapshot for Casper Mountain
Last spring frost
May 10
First fall frost
Sep 29
Growing season
138 days
Hardiness zone
5a
More local growing data for Casper Mountain: nearby ZIP 82644 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Alcova
Antelope Hills
Bar Nunn
Bessemer Bend
Brookhurst
Casper
Edgerton
Evansville
Hartrandt
Homa Hills
Meadow Acres
Midwest
Mills
Mountain View
Powder River
Red Butte
Vista West
Climate data from the nearest NOAA station, Casper Wwtp, Wy (4.3 mi from Casper Mountain). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.