Grand Junction (CO) Weather and Climate: A Comprehensive Guide
The climate in Grand Junction is marked by big temperature swings throughout the year.
Temperatures range from very warm during the warmest months
to cold in the cooler months.
The city sits in an arid zone with minimal moisture.
Let's now guide you through the climate details for a complete overview.
Average maximum day and minimum night temperature
In Grand Junction, temperatures differ significantly between summer and winter months. Average daytime temperatures reach a very warm 34°C in July. In January, the coolest month of the year, temperatures drop to a chilly 3°C.
At night, you can expect cooler temperatures, with averages dropping to around -9°C during this month. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Grand Junction sits in an arid zone with minimal moisture, averaging 245 mm of rain/snowfall per year. Grand Junction can be quite wet during October, receiving approximately 30 mm of precipitation over 8 rainy days. In contrast June, experiences much drier conditions, with 11 mm of rainfall, spread across 3 rainy days. For more details, please visit our Grand Junction Precipitation page.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Grand Junction can be enjoyed more throughout the sunniest month of June under a blue sky, with approximately 11.9 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 6.0 hours of sunlight per day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Average humidity
The relative humidity is moderate throughout the year in Grand Junction.
The city experiences its highest humidity in January, reaching 68%. In June, the humidity drops to its lowest level at 28%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
Average wind speed
The average wind speed over the year ranges from 2 m/s to 5 m/s. It is lower in January and higher in June.
The mean monthly wind speed over the year (meters per second)
broken clouds and no rain almost clear and no rain broken clouds and no rainForecast for Grand Junction (CO)
3 m/s
2 m/s
3 m/s
The best time of year to visit Grand Junction in the United States of America
Other facts from our historical weather data:Yes, the months of January, February, March, June and November are very dry.
July has an average maximum temperature of 34°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 3°C.
October tops the wettest month list with 30 mm of rainfall.
June is the driest month with 11 mm of precipitation.
June is the sunniest month with an average of 357 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
