Wyoming · NWS RIW office

Casper, WY weather

It is 45°F and clear at Casper, Natrona County International Airport as of Oct 28, 12:15 AM MDT. Overnight: Mostly Cloudy, low near 41°F, 18% chance of precipitation. Forecast from the National Weather Service, issued Oct 28, 12:01 AM MDT.

Updated Oct 28, 12:22 AM MDT (snapshot)

Current conditions

Temperature

45°F

Clear · feels like 42°F

Wind

SSW 5 mph

Humidity 49% · dew point 27°F

Pressure · visibility

—

Visibility 10 mi

Observed at Casper, Natrona County International Airport (KCPR), Oct 28, 12:15 AM MDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Casper forecast zone right now.

Around the NWS RIW forecast area

No active alerts in zones served by the RIW office near Casper.

From the alert snapshot of Oct 28, 2026, 2:15 AM EDT. No alerts are active anywhere in Wyoming.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Casper (local time)
TimeTempForecastPrecip. chanceWind
Wed 12 AM47°FMostly Cloudy4%SSW 7 mph
Wed 1 AM46°FMostly Cloudy5%SSW 7 mph
Wed 2 AM45°FMostly Cloudy8%SW 8 mph
Wed 3 AM45°FMostly Cloudy18%SW 10 mph
Wed 4 AM43°FMostly Cloudy14%WSW 13 mph
Wed 5 AM42°FMostly Cloudy8%W 14 mph
Wed 6 AM43°FMostly Cloudy1%WSW 15 mph
Wed 7 AM42°FMostly Cloudy0%SW 15 mph
Wed 8 AM41°FPartly Sunny0%SW 15 mph
Wed 9 AM42°FMostly Sunny0%WSW 16 mph
Wed 10 AM46°FSunny0%W 18 mph
Wed 11 AM49°FSunny0%W 18 mph
Wed 12 PM52°FSunny0%W 18 mph
Wed 1 PM55°FSunny0%W 20 mph
Wed 2 PM55°FSunny0%W 20 mph
Wed 3 PM57°FSunny0%WSW 20 mph
Wed 4 PM56°FSunny0%WSW 20 mph
Wed 5 PM55°FSunny0%WSW 16 mph
Wed 6 PM52°FClear0%WSW 13 mph
Wed 7 PM48°FMostly Clear0%WSW 12 mph
Wed 8 PM47°FMostly Clear0%WSW 10 mph
Wed 9 PM45°FMostly Clear0%SW 9 mph
Wed 10 PM44°FMostly Clear0%SW 8 mph
Wed 11 PM42°FMostly Clear0%SSW 8 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Casper can differ.

7-day forecast

Overnight

Low 41°F

Mostly cloudy, with a low around 41. West southwest wind 7 to 14 mph. Chance of precipitation is 20%.

Wednesday

High 57°F·Low 36°F

Sunny, with a high near 57. West southwest wind 15 to 20 mph, with gusts as high as 28 mph.

Wednesday Night: Mostly clear, with a low around 36. Southwest wind 7 to 13 mph.

Thursday

High 62°F·Low 34°F

Sunny, with a high near 62. Southwest wind 6 to 14 mph.

Thursday Night: Partly cloudy, with a low around 34. South southwest wind around 3 mph.

Friday

High 64°F·Low 40°F

Mostly sunny, with a high near 64. South southwest wind 1 to 6 mph.

Friday Night: Partly cloudy, with a low around 40. South southeast wind around 6 mph.

Saturday

High 62°F·Low 40°F

Mostly sunny, with a high near 62.

Saturday Night: Partly cloudy, with a low around 40.

Sunday

High 59°F·Low 35°F

Rain showers likely after 11am. Mostly cloudy, with a high near 59.

Sunday Night: Rain showers likely before 11pm, then rain and snow showers. Mostly cloudy, with a low around 35.

Monday

High 46°F·Low 30°F

Rain and snow showers likely. Partly sunny, with a high near 46.

Monday Night: A chance of rain and snow showers. Partly cloudy, with a low around 30.

Tuesday

High 50°F

A slight chance of rain and snow showers before 11am. Mostly sunny, with a high near 50.

Nearby cities

See every city we cover in Wyoming, or check all active alerts.

About this forecast

Forecast office
Casper is served by the National Weather Service RIW forecast office, forecast zone WYZ020, county zone WYC025.
Location used
The Census Bureau's internal point for Casper (42.8421, -106.3213), in Natrona County. Population: 58,823 (2024 estimate), number 2 of the 5 Wyoming cities on this site.
Radar
Nearest NWS radar: KRIW. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/42.8421,-106.3213 (forecast issued Oct 28, 12:01 AM MDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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