10-Day Weather Forecast - Newcastle, WY

Sunny. Not as cool with highs in the mid 30s. Northwest winds 5 to 10 mph.

Mostly clear. Lows 15 to 20. Northwest winds 5 to 10 mph.

Partly cloudy. Highs in the lower 40s. Northwest winds 5 to 10 mph. Gusts up to 20 mph in the afternoon.

Mostly clear. Lows around 20. Northwest winds 5 to 10 mph.

Mostly sunny. Highs in the upper 40s.

Mostly clear in the evening then becoming partly cloudy. Lows in the lower 20s.

Becoming mostly cloudy. Highs in the upper 40s.

Partly cloudy. Lows in the mid 20s.

Partly cloudy. Highs in the upper 40s.

Partly cloudy. Lows in the lower 20s.

Mostly sunny in the morning then becoming partly cloudy. Highs in the mid 40s.

Partly cloudy. Lows in the mid 20s.

Partly cloudy. Highs in the mid 40s.

Mostly clear. Low temperature around 29F. Dew point will be around 23F with an average humidity of 71%. Winds will be 3 mph from the NW.

Mostly sunny. High temperature around 42F. Dew point will be around 23F with an average humidity of 54%. Winds will be 4 mph from the NW.

Clear. Low temperature around 28F. Dew point will be around 21F with an average humidity of 67%. Winds will be 4 mph from the NW.

Sunny. High temperature around 40F. Dew point will be around 21F with an average humidity of 54%. Winds will be 6 mph from the NW.

Mostly clear. Low temperature around 26F. Dew point will be around 19F with an average humidity of 67%. Winds will be 3 mph from the NW.