Grand Junction Weather & Climate

United States of America

Grand Junction sees feels-like daytime highs peak around 36.1°C in July and nighttime lows bottom out near -6.2°C in January. September is the wettest month (~29 mm), while January is the driest (~11 mm). For sunshine, September leads with about 76% clear skies.

Best time to visit Grand Junction

Based on mild feels-like temperatures and low rain chances, the most comfortable months are September, May, and June — expect around 14.827.3°C with roughly 19% chance of rain on a given day in September.

Grand Junction climate by month

MonthLow / High °CRain %RainfallClear skiesWind
January-6.2° / 1.9°7%11 mm57%10.2 kph
February-2.3° / 6.3°10%14 mm52%11.1 kph
March2.7° / 13.7°14%19 mm53%12.5 kph
April7.2° / 19.5°15%21 mm56%13.2 kph
May12.6° / 25.2°15%22 mm61%13.1 kph
June18.2° / 32.4°10%14 mm74%12.6 kph
July21.7° / 36.1°17%20 mm72%10.7 kph
August20.3° / 33.5°19%23 mm72%10.1 kph
September14.8° / 27.3°19%29 mm76%10.9 kph
October7.4° / 19.5°17%29 mm70%10.9 kph
November0.1° / 9.5°12%20 mm61%10.4 kph
December-5.4° / 2.2°7%13 mm57%10.1 kph

Feels-like temperatures from long-term historical data; ☀ marks the most comfortable months (mild temperatures, low rain).

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