Climate & Weather in Casper
Casper has a real, genuinely semi-arid, high-plains climate (Köppen BSk): freezing, windy, snowy winters (winter mean around 22°F) and warm, dry summers (July highs around 90°F), with meaningful annual snowfall and persistent, real wind exposure among the strongest of any U.S. city.
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Learn moreFreezing, Windy Winters
Casper's winters are cited as genuinely freezing, with a winter mean daily temperature around 22°F. January's cited average high runs approximately 38°F, with an average low around 17°F, and the annual range typically runs from 17°F to 88°F, rarely dropping below -2°F or rising above 96°F.
Warm, Dry Summers
Summers are cited as warm and dry: in July, the warmest month, average highs reach approximately 90°F with lows around 58°F, and the mean daily summer temperature runs around 71°F.
A Genuinely Semi-Arid, High-Elevation Climate (Köppen BSk)
Casper's climate is classified as BSk -- a cold semi-arid (steppe) climate -- marked by large diurnal and annual temperature swings driven by the city's northern latitude (nearly 43°N), dry climate, and elevation in excess of a mile high. Approximately 70% of annual precipitation falls during the growing season, from late spring through summer, mostly from thunderstorms.
Meaningful Annual Snowfall
Casper averages approximately 75 inches of snowfall per year -- well above most U.S. cities -- with monthly totals cited around 9 inches in January, 10 inches in February, and 11 inches in March, peaking in winter and early spring.
Persistent, Genuinely Strong Wind -- Among the Windiest Cities in the U.S.
Casper consistently ranks among the windiest cities in the United States, with average annual wind speeds around 13 mph and regular gusts of 40-50 mph, especially in spring -- windy days are frequent during winter and spring months, a real, defining feature of daily life this record discloses directly.
Key takeaways
- Casper's winter mean daily temperature runs around 22°F, with genuinely freezing, windy, snowy conditions.
- Casper's July average high runs around 90°F, with a warm, dry summer climate classified as semi-arid (Köppen BSk).
- Casper averages approximately 75 inches of snowfall per year, well above most U.S. cities.
- Casper is among the windiest U.S. cities, with average wind speeds around 13 mph and regular 40-50 mph gusts, especially in spring.
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