Weather in New Castle, CO
Updated 2026-08-11 10:15 local time · ZIP codes 81647
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
74°1% rain84°1% rain88°1% rain90°2% rain
91°17% rain
92°3% rain92°3% rain93°3% rain91°2% rain88°7% rain69°17% rain
60°9% 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 17%).
It feels like 75°F with winds near 2 mph.
74°F, 1% rain chance and 2 mph wind.
Visibility is around 10 mi; gusts may reach 12 mph.
Current temperature is 74°F, wind 2 mph, rain chance up to 17%.
UV index is 4. Sunscreen and sunglasses are sensible for longer outdoor time.
New Castle weather today
Sunny and 74°F in New Castle, CO. Today's high is 93°F with a 36% rain chance. Winds are around 2 mph with gusts near 7 mph. Relative humidity is 36%, pressure is 30.23 inHg, and visibility is about 10 miles.
Tonight and tomorrow in New Castle
Sunrise is at 06:18 AM and sunset is at 08:11 PM. Tomorrow's forecast calls for Sunny with a high near 90°F and a low near 50°F. The maximum rain chance is 58%.