Weather in Newcastle, CA
Updated 2026-08-11 10:30 local time · ZIP codes 95658
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
80°1% rain88°1% rain91°0% rain94°0% rain96°0% rain98°0% rain97°0% rain95°0% rain93°0% rain89°0% rain83°0% rain
78°1% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 1%).
It feels like 80°F with winds near 5 mph.
83°F, 0% rain chance and 6 mph wind.
Visibility is around 10 mi; gusts may reach 12 mph.
Current temperature is 80°F, wind 5 mph, rain chance up to 1%.
UV index is 4. Sunscreen and sunglasses are sensible for longer outdoor time.
Newcastle weather today
Sunny and 80°F in Newcastle, CA. Today's high is 98°F with a 0% rain chance. Winds are around 5 mph with gusts near 6 mph. Relative humidity is 28%, pressure is 29.99 inHg, and visibility is about 10 miles.
Tonight and tomorrow in Newcastle
Sunrise is at 06:14 AM and sunset is at 08:04 PM. Tomorrow's forecast calls for Sunny with a high near 92°F and a low near 66°F. The maximum rain chance is 57%.