Newcastle, Wyoming has a semi-arid climate with long, hot and dry summers and cold winters. The city experiences an average of 300 days of sunshine each year. Winters are usually dry but can be quite cold, with temperatures averaging in the low 20s Fahrenheit during the day. Summers can get hot with temperatures reaching up to 90 degrees Fahrenheit during the day. Precipitation is low throughout the year, however it does receive more precipitation in spring and summer than in winter and fall. Newcastle experiences occasional thunderstorms and snowfall but it generally has milder weather than other parts of Wyoming.
Newcastle, Wyoming gets 18 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Newcastle averages 42 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 223 sunny days per year in Newcastle. The US average is 205 sunny days.
Newcastle gets some kind of precipitation, on average, 83 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 86 degrees
Winter Low: the January low is 13
Rain: averages 18 inches of rain a year
Snow: averages 42 inches of snow a year