Casper Mountain, WY Weather & Growing Conditions
Overnight
32°F
Mostly Cloudy
Mostly cloudy. Low around 32, with temperatures rising to around 35 overnight. Southwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 32°F | Mostly Cloudy | 6 mph SW | 0% |
| Wednesday | 49°F | Mostly Cloudy | 5 mph NW | 0% |
| Wednesday Night | 32°F | Mostly Cloudy | 1 to 5 mph SW | 0% |
| Thursday | 53°F | Mostly Sunny | 3 to 8 mph SW | 0% |
| Thursday Night | 33°F | Mostly Cloudy | 8 mph SW | 0% |
| Friday | 50°F | Sunny | 6 to 9 mph WSW | 2% |
| Friday Night | 32°F | Mostly Clear | 6 to 13 mph SW | 0% |
| Saturday | 53°F | Sunny | 7 to 10 mph SW | 0% |
| Saturday Night | 35°F | Mostly Clear | 7 to 16 mph SW | 0% |
| Sunday | 59°F | Sunny | 18 mph SW | 0% |
| Sunday Night | 42°F | Mostly Clear | 12 to 20 mph SW | 0% |
| Monday | 59°F | Sunny | 6 to 12 mph SW | 0% |
| Monday Night | 41°F | Partly Cloudy | 6 to 13 mph SSW | 0% |
| Tuesday | 59°F | Mostly Sunny | 7 to 13 mph SW | 0% |
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 Nov 4, 2026.