Casper, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Casper, a city in Natrona County, Wyoming.
Today
79°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 79. East northeast wind around 10 mph.
7-day forecast for Casper
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Areas Of Smoke | 10 mph ENE | 1% |
| Tonight | 50°F | Areas Of Smoke | 2 to 17 mph ENE | 2% |
| Wednesday | 88°F | Sunny | 2 to 9 mph W | 0% |
| Wednesday Night | 53°F | Mostly Clear | 3 to 10 mph E | 0% |
| Thursday | 94°F | Sunny | 3 to 10 mph W | 0% |
| Thursday Night | 58°F | Clear | 3 to 10 mph ESE | 0% |
| Friday | 98°F | Sunny | 3 to 8 mph W | 0% |
| Friday Night | 61°F | Clear | 9 mph W | 0% |
| Saturday | 98°F | Sunny | 8 to 16 mph W | 0% |
| Saturday Night | 62°F | Mostly Clear | 6 to 10 mph WSW | 0% |
| Sunday | 99°F | Sunny | 8 to 15 mph W | 1% |
| Sunday Night | 62°F | Partly Cloudy | 6 to 12 mph W | 5% |
| Monday | 98°F | Mostly Sunny | 7 to 12 mph W | 4% |
| Monday Night | 62°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 9 mph ENE | 18% |
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
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Bessemer Bend
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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 Aug 4, 2026.