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Greeley, CO Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Greeley, CO?
Greeley, CO gets 14.7 in of precipitation a year over about 72 rainy days, and about 34.9 in of snow a season. July is the warmest month (average high 92°F) and January the coldest (average low 18°F).
Semi-arid climate
Greeley, CO has hot summers and chilly winters. Daytime highs range from about 43°F in December to 92°F in July. May is usually the wettest month, and snow falls in winter. The most comfortable time to visit is typically April and October, when daytime highs sit near 67°F.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 19° | 45° |
| Spring | Mar–May | 36° | 67° |
| Summer | Jun–Aug | 57° | 89° |
| Autumn | Sep–Nov | 37° | 68° |
How much rain does Greeley get?
Greeley gets 14.7 in of precipitation in an average year, spread over about 72 days with measurable rain. That is fewer rainy days than 65% of the US.
May is the wettest month, with 2.6 in. January is the driest, with 0.5 in. May has the most rainy days, about 11.
The longest dry spell in the last five years lasted 41 days, to March 28, 2025.
From September 2025 to August 2026 Greeley got 5.8 in of rain, against a normal of 14.7 in for those months. May 2026 had the most, with 2.2 in.
See where Greeley ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Colorado.
Does it snow in Greeley?
Yes. Greeley gets about 34.9 in of snow in an average season, measured at the reporting station.
The snowiest winter on record is 1979–80, with 79.1 in.
The most recent measurable snow at the station fell on March 6, 2026.
From September 2025 to August 2026 the station measured 6.7 in of snow, against a normal of 34.9 in for those months. January 2026 had the most, with 3.1 in.
See where Greeley ranks: snowiest cities in the US.
Greeley weather by month
Greeley weather in January
In January, Greeley averages a high of 44°F and a low of 18°F. It gets 0.5 in of precipitation over about 4 rainy days. Estimated sunshine is 50% of daylight hours, derived from ERA5 cloud cover. The January record high is 74°F (1982) and the record low is -25°F (1984).
Greeley weather in February
In February, Greeley averages a high of 48°F and a low of 20°F. It gets 0.5 in of precipitation over about 4 rainy days. Estimated sunshine is 54% of daylight hours, derived from ERA5 cloud cover. The February record high is 78°F (2020) and the record low is -20°F (1996).
Greeley weather in March
In March, Greeley averages a high of 59°F and a low of 28°F. It gets 0.9 in of precipitation over about 5 rainy days. Estimated sunshine is 50% of daylight hours, derived from ERA5 cloud cover. The March record high is 94°F (2026) and the record low is -10°F (2019).
Greeley weather in April
In April, Greeley averages a high of 66°F and a low of 35°F. It gets 1.8 in of precipitation over about 8 rainy days. Estimated sunshine is 53% of daylight hours, derived from ERA5 cloud cover. The April record high is 92°F (2006) and the record low is -3°F (1975). April is one of the most comfortable months to visit.
Greeley weather in May
In May, Greeley averages a high of 75°F and a low of 45°F. It gets 2.6 in of precipitation over about 11 rainy days. Estimated sunshine is 47% of daylight hours, derived from ERA5 cloud cover. The May record high is 101°F (2003) and the record low is 21°F (2013).
Greeley weather in June
In June, Greeley averages a high of 86°F and a low of 54°F. It gets 1.8 in of precipitation over about 8 rainy days. Estimated sunshine is 53% of daylight hours, derived from ERA5 cloud cover. The June record high is 110°F (2006) and the record low is 34°F (2007).
Greeley weather in July
In July, Greeley averages a high of 92°F and a low of 59°F. It gets 1.6 in of precipitation over about 7 rainy days. Estimated sunshine is 61% of daylight hours, derived from ERA5 cloud cover. The July record high is 112°F (2006) and the record low is 42°F (1971).
Greeley weather in August
In August, Greeley averages a high of 89°F and a low of 57°F. It gets 1.6 in of precipitation over about 7 rainy days. Estimated sunshine is 62% of daylight hours, derived from ERA5 cloud cover. The August record high is 109°F (2026) and the record low is 41°F (1992).
Greeley weather in September
In September, Greeley averages a high of 82°F and a low of 49°F. It gets 1.1 in of precipitation over about 6 rainy days. Estimated sunshine is 72% of daylight hours, derived from ERA5 cloud cover. The September record high is 105°F (2020) and the record low is 17°F (1985).
Greeley weather in October
In October, Greeley averages a high of 68°F and a low of 37°F. It gets 1.1 in of precipitation over about 6 rainy days. Estimated sunshine is 68% of daylight hours, derived from ERA5 cloud cover. The October record high is 93°F (2024) and the record low is -2°F (2020). October is one of the most comfortable months to visit.
Greeley weather in November
In November, Greeley averages a high of 53°F and a low of 26°F. It gets 0.7 in of precipitation over about 4 rainy days. Estimated sunshine is 62% of daylight hours, derived from ERA5 cloud cover. The November record high is 84°F (2007) and the record low is -7°F (2014).
Greeley weather in December
In December, Greeley averages a high of 43°F and a low of 18°F. It gets 0.6 in of precipitation over about 4 rainy days. Estimated sunshine is 59% of daylight hours, derived from ERA5 cloud cover. The December record high is 76°F (2007) and the record low is -24°F (1989).
Sunshine, humidity and wind in Greeley
September is the sunniest month in Greeley, with estimated sunshine of 72% of daylight hours from ERA5 cloud cover. May is the cloudiest, at 47%. The annual cloud-cover estimate is 58% of daylight hours; it is not a measurement of sunshine duration. Greeley is sunnier than 81% of the US.
Humidity peaks in January at 56% and is lowest in April at 35%.
Greeley has about 52 days a year above 90°F. Greeley is hotter than 70% of the US.
Thunderstorms occur on about 24 days a year.
See where Greeley ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.
First and last freeze in Greeley
The first fall freeze in Greeley typically comes around October 6, and the last spring freeze around May 3. That leaves a frost-free growing season of about 156 days.
Greeley weather records
These records cover GREELEY UNC during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Greeley station is 112°F, on July 16, 2006. The coldest is -25°F, on January 18, 1984.
The wettest day in the available station history brought 3.5 in of precipitation, on July 13, 2001.
39 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.8°F per decade since 1970.
The best time to visit Greeley
The most comfortable time to visit is typically April and October, when daytime highs sit near 67°F.
Winter (December–February) is chilly, with average highs around 45°F and lows near 19°F. Snow is possible.
Spring (March–May) is mild, with average highs around 67°F and lows near 36°F.
Summer (June–August) is hot, with average highs around 89°F and lows near 57°F.
Autumn (September–November) is mild, with average highs around 68°F and lows near 37°F.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 18° | 44° | 0.45 in | 4 | 56% | 50% | 74° | -25° |
| February | 20° | 48° | 0.45 in | 4 | 50% | 54% | 78° | -20° |
| March | 28° | 59° | 0.91 in | 5 | 46% | 50% | 94° | -10° |
| April | 35° | 66° | 1.8 in | 8 | 35% | 53% | 92° | -3° |
| May | 45° | 75° | 2.6 in | 11 | 45% | 47% | 101° | 21° |
| June | 54° | 86° | 1.8 in | 8 | 41% | 53% | 110° | 34° |
| July | 59° | 92° | 1.6 in | 7 | 41% | 61% | 112° | 42° |
| August | 57° | 89° | 1.6 in | 7 | 40% | 62% | 109° | 41° |
| September | 49° | 82° | 1.1 in | 6 | 35% | 72% | 105° | 17° |
| October | 37° | 68° | 1.1 in | 6 | 40% | 68% | 93° | -2° |
| November | 26° | 53° | 0.67 in | 4 | 47% | 62% | 84° | -7° |
| December | 18° | 43° | 0.55 in | 4 | 46% | 59% | 76° | -24° |
Station: GREELEY UNC, 3 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Greeley climate questions
How much rain does Greeley get?
Greeley gets 14.7 in of precipitation in an average year, over about 72 rainy days.
What is the wettest month in Greeley?
May is the wettest month in Greeley, with 2.6 in. January is the driest, with 0.5 in.
How many rainy days does Greeley have a year?
Greeley has about 72 days with measurable rain in an average year. May has the most, about 11.
Does it snow in Greeley?
Yes. Greeley gets about 34.9 in of snow in an average season. The snowiest winter on record is 1979–80, with 79.1 in.
What is the hottest month in Greeley?
July is the warmest month in Greeley, with an average high of 92°F.
What is the coldest month in Greeley?
January is the coldest month in Greeley, with an average low of 18°F.
What is the record high temperature in Greeley?
Within the available 1970–2026 station history, the record high at the Greeley station is 112°F, set on July 16, 2006. The record low is -25°F, on January 18, 1984.
What is the sunniest month in Greeley?
September is the sunniest month in Greeley, with estimated sunshine of 72% of daylight hours from ERA5 cloud cover. May is the cloudiest.
When is the first frost in Greeley?
The first fall freeze in Greeley typically comes around October 6. The last spring freeze is around May 3.
What is the best time to visit Greeley?
The most comfortable time to visit is typically April and October, when daytime highs sit near 67°F.