Edgemont experiences four distinct seasons in a semi-arid, continental climate. Late spring is Edgemont's rainy season. Precipitation in May comes mostly in short rain showers. By June, afternoon thunderstorms are a common occurrence. Annual precipitation is around 15 inches with over a third of the moisture occurring in the late spring season.
Daytime highs during the month of May average in the 50s and 60s, and 60s and 70s during June. Overnight temperatures are still chilly, where May minimums are in the 30s and 40s. Lows are typically in the 40s and 50s during June.
Mid-summer in Edgemont is warm and dry with plenty of sunshine. July and August are the warmest months of the year, when daytime temperatures climb into the 80s and 90s. Humidity levels are low, and there is usually a breeze during the day. Early mornings are cool, so a jacket or sweater may be needed for outdoor activities. At night temps drop into the 50s and 60s.
Sunny, mild days and cool nights are typical during the autumn months of September and October. Temperatures begin to fall around Labor Day, with highs averaging in the 60s and 70s during September and 50s and 60s in October. Lows drop from the 30s and 40s to the 20s and 30s.
The average first freeze in Edgemont is early October.
The first significant snowfall of the season is usually in October, although higher elevations sometimes receive snow as early as September. Occasional cold fronts moving through the area can bring blustery northwest winds.
- On average, the warmest month is July.
- The highest recorded temperature was 107°F in 2006.
- The average coolest month is January.
- The lowest recorded temperature was -40°F in 1989.
- May is the average wettest month.