Harman US

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

WhenTempForecastWindPrecip
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

All Wyoming locations ›

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.