Currently: 52 °F. Overcast. (Weather station: Sioux City Sioux Gateway Airport, USA). See more current weatherAnnual Weather Averages in Sioux City Sioux Gateway Airport
Sioux City Sioux Gateway Airport is 30 miles from Newcastle, so the actual climate in Newcastle can vary a bit.
Based on weather reports collected during 1992–2021.
All Year Climate & Weather Averages in Newcastle
High Temp: 86 °F
Low Temp: 11 °F
Mean Temp: 49 °F
Precipitation: 2.34"
Humidity: 70%
Dew Point: 39 °F
Wind: 16 mph
Pressure: 30.04 "Hg
Visibility: 9 mi
January Climate & Weather Averages in Newcastle
High Temp: 30 °F
Low Temp: 11 °F
Mean Temp: 21 °F
Precipitation: 0.71"
Humidity: 77%
Dew Point: 15 °F
Wind: 17 mph
Pressure: 30.16 "Hg
Visibility: 9 mi
February Climate & Weather Averages in Newcastle
High Temp: 34 °F
Low Temp: 15 °F
Mean Temp: 25 °F
Precipitation: 0.79"
Humidity: 75%
Dew Point: 18 °F
Wind: 17 mph
Pressure: 30.15 "Hg
Visibility: 9 mi
March Climate & Weather Averages in Newcastle
High Temp: 48 °F
Low Temp: 26 °F
Mean Temp: 37 °F
Precipitation: 1.65"
Humidity: 69%
Dew Point: 27 °F
Wind: 18 mph
Pressure: 30.09 "Hg
Visibility: 9 mi
April Climate & Weather Averages in Newcastle
High Temp: 61 °F
Low Temp: 36 °F
Mean Temp: 49 °F
Precipitation: 2.84"
Humidity: 62%
Dew Point: 36 °F
Wind: 19 mph
Pressure: 29.99 "Hg
Visibility: 10 mi
May Climate & Weather Averages in Newcastle
High Temp: 72 °F
Low Temp: 49 °F
Mean Temp: 60 °F
Precipitation: 3.96"
Humidity: 63%
Dew Point: 47 °F
Wind: 18 mph
Pressure: 29.95 "Hg
Visibility: 10 mi
June Climate & Weather Averages in Newcastle
High Temp: 83 °F
Low Temp: 59 °F
Mean Temp: 71 °F
Precipitation: 3.86"
Humidity: 66%
Dew Point: 59 °F
Wind: 15 mph
Pressure: 29.90 "Hg
Visibility: 10 mi
July Climate & Weather Averages in Newcastle
High Temp: 86 °F
Low Temp: 64 °F
Mean Temp: 75 °F
Precipitation: 3.44"
Humidity: 73%
Dew Point: 65 °F
Wind: 12 mph
Pressure: 29.95 "Hg
Visibility: 10 mi
August Climate & Weather Averages in Newcastle
High Temp: 83 °F
Low Temp: 61 °F
Mean Temp: 72 °F
Precipitation: 3.80"
Humidity: 75%
Dew Point: 64 °F
Wind: 12 mph
Pressure: 29.98 "Hg
Visibility: 9 mi
September Climate & Weather Averages in Newcastle
High Temp: 77 °F
Low Temp: 51 °F
Mean Temp: 64 °F
Precipitation: 2.77"
Humidity: 69%
Dew Point: 54 °F
Wind: 14 mph
Pressure: 30.01 "Hg
Visibility: 10 mi
October Climate & Weather Averages in Newcastle
High Temp: 64 °F
Low Temp: 38 °F
Mean Temp: 51 °F
Precipitation: 2.09"
Humidity: 66%
Dew Point: 39 °F
Wind: 16 mph
Pressure: 30.04 "Hg
Visibility: 10 mi
November Climate & Weather Averages in Newcastle
High Temp: 48 °F
Low Temp: 25 °F
Mean Temp: 37 °F
Precipitation: 1.18"
Humidity: 70%
Dew Point: 27 °F
Wind: 16 mph
Pressure: 30.10 "Hg
Visibility: 9 mi
December Climate & Weather Averages in Newcastle
High Temp: 35 °F
Low Temp: 15 °F
Mean Temp: 25 °F
Precipitation: 0.95"
Humidity: 77%
Dew Point: 18 °F
Wind: 16 mph
Pressure: 30.12 "Hg
Visibility: 9 mi