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
28°F
Mostly Clear
Mostly clear, with a low around 28. Southwest wind around 8 mph.
7-day forecast for Casper Mountain
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 28°F | Mostly Clear | 8 mph SW | 0% |
| Wednesday | 40°F | Partly Sunny | 6 mph ENE | 0% |
| Wednesday Night | 28°F | Mostly Cloudy | 2 to 9 mph ENE | 0% |
| Thursday | 43°F | Mostly Sunny | 5 to 10 mph SW | 0% |
| Thursday Night | 31°F | Mostly Cloudy | 6 to 12 mph SW | 0% |
| Friday | 40°F | Sunny | 6 to 10 mph WSW | 2% |
| Friday Night | 29°F | Mostly Clear | 7 to 15 mph SW | 0% |
| Saturday | 44°F | Sunny | 6 to 14 mph SW | 0% |
| Saturday Night | 32°F | Mostly Clear | 6 to 20 mph SSW | 0% |
| Sunday | 49°F | Sunny | 14 to 20 mph SW | 0% |
| Sunday Night | 38°F | Mostly Clear | 16 mph SW | 0% |
| Monday | 48°F | Sunny | 7 to 15 mph SW | 0% |
| Monday Night | 37°F | Partly Cloudy | 7 to 16 mph SSW | 0% |
| Tuesday | 49°F | Mostly Sunny | 6 to 16 mph SW | 0% |
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
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Midwest
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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 Nov 4, 2026.