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The climate in Grand Junction is temperate, which means that the city experiences four, distinct season changes. Although it can be visited throughout the year, warm-weather fans should plan a trip during the warmer spring, summer, and early fall seasons, as winters can get very cold.
On average, the hottest month of the year is July, during which time the daily high temperatures will generally hover in the upper 90’s and maybe even into the lower 100’s. The nighttime temperatures during the summer months will generally drop to the low 60’s, so make sure to bring along a warmer layer. Almost all buildings have air conditioning, either a "swamp cooler" (evaporative cooler) or refrigerated central air. The coldest months of the year on average are December and January, during which time the daily high temperatures will reach the mid to upper 30’s. The nighttime temperatures during these months will generally drop to the mid teens.
Grand Junction is not a very wet city, but storms can roll through during any month of the year. Statistically, the months with the most precipitation are March and October, during which time it will rain around an inch each month.For more weather information about Grand Junction, check out this Ten Day Forecast and this Monthly Weather Averages page.