Weather in Newcastle, WY
Updated 2026-09-26 10:15 local time · ZIP codes 82701
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
66°2% rain71°1% rain74°1% rain
76°3% rain77°1% rain78°1% rain78°0% rain77°0% rain75°0% rain
71°1% rain68°1% rain65°1% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 3%).
It feels like 59°F with winds near 13 mph.
71°F, 1% rain chance and 7 mph wind.
Visibility is around 6 mi; gusts may reach 21 mph.
Current temperature is 66°F, wind 13 mph, rain chance up to 3%.
UV index is 2.
Local weather characteristics in Newcastle
Wyoming is generally dry, windy and high-elevation. Mountain weather can change quickly, with colder temperatures and heavier snow than nearby basins and plains.
Newcastle is part of the West weather region. The forecast point is near 43.85°N latitude and 104.20°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Newcastle weather today
Sunny and 66°F in Newcastle, WY. Today's high is 78°F with a 2% rain chance. Winds are around 13 mph with gusts near 15 mph. Relative humidity is 50%, pressure is 29.84 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Newcastle
Sunrise is at 06:48 AM and sunset is at 06:47 PM. Tomorrow's forecast calls for Overcast with a high near 77°F and a low near 57°F. The maximum rain chance is 17%.