Weather in Newcastle, UT
Updated 2026-09-26 09:00 local time · ZIP codes 84756
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
65°1% rain72°1% rain
75°2% rain76°1% rain
77°9% rain78°9% rain77°9% rain
77°6% rain77°0% rain76°8% rain73°9% rain
68°5% 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 9%).
It feels like 61°F with winds near 2 mph.
72°F, 1% rain chance and 9 mph wind.
Visibility is around 6 mi; gusts may reach 23 mph.
Current temperature is 65°F, wind 2 mph, rain chance up to 9%.
UV index is 1.
Local weather characteristics in Newcastle
Utah is generally dry, but elevation creates major contrasts between hot desert valleys and colder mountain areas with substantial winter snowfall.
Newcastle is part of the West weather region. The forecast point is near 37.67°N latitude and 113.55°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 65°F in Newcastle, UT. Today's high is 78°F with a 3% rain chance. Winds are around 2 mph with gusts near 6 mph. Relative humidity is 37%, pressure is 29.98 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Newcastle
Sunrise is at 07:25 AM and sunset is at 07:25 PM. Tomorrow's forecast calls for Overcast with a high near 78°F and a low near 57°F. The maximum rain chance is 5%.