Greeley (CO) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Greeley.
Climate overview of Greeley
Temperatures in Greeley, Colorado, United States of America, vary greatly throughout the year. July is the hottest month at 33°C (91°F), while December is the coldest at 4°C (39°F).
The city has a relatively dry climate, receiving around 389 mm (15 in) of rain/snowfall per year. It does experience a distinct dry season from September to March, with very warm summers and cold winters. May is the wettest month and January the driest.
Greeley Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Greeley - and find the best time to visit.
Monthly Temperature in Greeley
The climate in Greeley is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a very warm 33°C (91°F) in July to a chilly 4°C (39°F) in December.
Nighttime temperatures range from 15°C (59°F) in July to -10°C (14°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Greeley
Greeley maintains relatively dry conditions year-round, recording average annual precipitation of 389 mm (15 in). The seasons in Greeley bring significant changes in precipitation. The wettest month, May, receives moderate rainfall, with an average of 75 mm (3 in) of precipitation. This rainfall is distributed across 12 rainy days.
In contrast, the driest month, January, experiences much less snow/rainfall, totaling 9.4 mm (0.4 in) over 3 snowy/rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Greeley Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Greeley
Each month is rated for comfortable sightseeing weather — mild temperatures and low rainfall. Tap a month for its full averages; your ideal time may differ for a beach or winter trip (see below).
- Best overall: May and September
- Warmest weather: July and August
- Fewer rainy days: January, February, March, November and December
- Climate seasons: a distinct dry season from September to March, with very warm summers and cold winters
- Best for winter weather: December, with freezing nights around -10°C (14°F).
Frequently asked questions about the climate in Greeley
What is the best time to visit Greeley?
May and September typically offer the most optimal weather in Greeley. In contrast, December tends to have less optimal conditions. Greeley has a distinct dry season from September to March, with very warm summers and cold winters.
What temperatures can I expect in Greeley?
Daytime highs range from 4°C (39°F) in December to 33°C (91°F) in July. Nighttime lows range from -10°C (14°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Greeley get?
Annual rainfall is around 389 mm (15 in). May is the wettest month with 75 mm (3 in), while January is the driest with 9.4 mm (0.4 in).
Greeley 3-Day Forecast
Greeley (CO) 3-Day Forecast
Greeley on the map
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