Casper, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Casper, a city in Natrona County, Wyoming.
Tonight
53°F
Partly Cloudy then Isolated Showers And Thunderstorms
Isolated showers and thunderstorms between midnight and 2am, then patchy fog. Partly cloudy, with a low around 53. West southwest wind around 3 mph.
7-day forecast for Casper
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Partly Cloudy then Isolated Showers And Thunderstorms | 3 mph WSW | 14% |
| Saturday | 73°F | Patchy Fog then Isolated Showers And Thunderstorms | 3 to 9 mph WSW | 22% |
| Saturday Night | 45°F | Scattered Showers And Thunderstorms then Showers And Thunderstorms Likely | 7 mph WNW | 71% |
| Sunday | 64°F | Showers And Thunderstorms Likely | 6 to 10 mph W | 64% |
| Sunday Night | 42°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 1 to 6 mph SW | 10% |
| Monday | 70°F | Sunny | 1 to 6 mph WSW | 0% |
| Monday Night | 44°F | Mostly Clear | 6 mph SE | 0% |
| Tuesday | 78°F | Sunny | 2 to 7 mph SW | 1% |
| Tuesday Night | 50°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 6 mph SE | 12% |
| Wednesday | 78°F | Mostly Sunny | 7 to 12 mph SW | 8% |
| Wednesday Night | 49°F | Mostly Clear | 5 mph SW | 5% |
| Thursday | 79°F | Mostly Sunny | 3 to 7 mph SW | 4% |
| Thursday Night | 50°F | Partly Cloudy | 7 mph SE | 9% |
| Friday | 81°F | Mostly Sunny | 6 to 10 mph SW | 7% |
Forecast source: National Weather Service (api.weather.gov) for Casper (42.842, -106.321). Updated through the day.
Growing snapshot for Casper
Last spring frost
May 10
First fall frost
Sep 29
Growing season
138 days
Hardiness zone
5a
More local growing data for Casper: nearby ZIP 82644 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Alcova
Antelope Hills
Bar Nunn
Bessemer Bend
Brookhurst
Casper Mountain
Edgerton
Evansville
Hartrandt
Homa Hills
Meadow Acres
Midwest
Mills
Mountain View
Powder River
Red Butte
Vista West
Climate data from the nearest NOAA station, Casper Wwtp, Wy (4.3 mi from Casper). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.