Casper Mountain, WY Weather & Growing Conditions
Overnight
54°F
Partly Cloudy
Partly cloudy. Low around 54, with temperatures rising to around 57 overnight. Southwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Partly Cloudy | 3 mph SW | 6% |
| Saturday | 71°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 9 mph W | 32% |
| Saturday Night | 46°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 7 mph W | 67% |
| Sunday | 61°F | Showers And Thunderstorms Likely | 6 to 13 mph W | 67% |
| Sunday Night | 43°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 1 to 8 mph SW | 10% |
| Monday | 66°F | Sunny | 1 to 7 mph W | 0% |
| Monday Night | 45°F | Mostly Clear | 7 mph SE | 0% |
| Tuesday | 73°F | Sunny | 2 to 9 mph SW | 1% |
| Tuesday Night | 51°F | Slight Chance Showers And Thunderstorms | 7 mph SE | 17% |
| Wednesday | 74°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 7 to 14 mph SW | 10% |
| Wednesday Night | 50°F | Partly Cloudy | 7 mph SW | 6% |
| Thursday | 77°F | Sunny | 8 mph WSW | 0% |
| Thursday Night | 52°F | Mostly Clear | 7 mph S | 1% |
| Friday | 78°F | Mostly Sunny | 6 to 9 mph SSW | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Casper Mountain, WY
Last spring frost
May 12
First fall frost
Oct 1
Growing season
143 days
Hardiness zone
5a
Explore more for Casper Mountain, WY: full frost dates · planting calendar · Wyoming frost dates
Climate data from the nearest NOAA station, Casper 1Sw, Wy (7.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.