Casper Mountain, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Casper Mountain, a community in Natrona County, Wyoming.
This Afternoon
60°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 60. West southwest wind around 8 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
7-day forecast for Casper Mountain
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 60°F | Slight Chance Showers And Thunderstorms | 8 mph WSW | 22% |
| Tonight | 42°F | Chance Showers And Thunderstorms | 5 to 8 mph WNW | 68% |
| Sunday | 48°F | Showers And Thunderstorms Likely | 8 to 12 mph W | 66% |
| Sunday Night | 39°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 2 to 7 mph W | 15% |
| Monday | 55°F | Sunny | 5 mph W | 1% |
| Monday Night | 41°F | Mostly Clear | 3 to 9 mph SE | 0% |
| Tuesday | 63°F | Sunny | 6 to 9 mph SW | 1% |
| Tuesday Night | 48°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 6 to 9 mph S | 13% |
| Wednesday | 63°F | Mostly Sunny | 15 mph SW | 8% |
| Wednesday Night | 47°F | Mostly Clear | 8 mph SW | 3% |
| Thursday | 66°F | Sunny | 9 mph WSW | 2% |
| Thursday Night | 49°F | Mostly Clear | 5 to 10 mph SSW | 2% |
| Friday | 67°F | Mostly Sunny | 10 mph SSW | 3% |
| Friday Night | 51°F | Mostly Clear then Slight Chance Rain Showers | 7 to 13 mph SSW | 15% |
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 Sep 20, 2026.