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Greeley, Colorado climate
Cfa Humid subtropical
Greeley has a seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 92°F, while the coldest is December averaging around 18°F at night. Precipitation totals about 15 inches a year and is strongly seasonal — May alone averages 2.6 inches while January barely receives 0.45 inches. Winters bring significant snowfall (35 inches of snow per year on average).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsGreeley climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 44 | 48 | 59 | 66 | 75 | 86 | 92 | 89 | 82 | 68 | 54 | 43 |
| Avg temp (°F) | 31 | 34 | 44 | 51 | 60 | 70 | 76 | 73 | 65 | 52 | 40 | 31 |
| Avg low (°F) | 18 | 20 | 28 | 35 | 45 | 54 | 59 | 57 | 49 | 37 | 26 | 18 |
| Precipitation (in) | 0.5 | 0.5 | 0.9 | 1.8 | 2.7 | 1.8 | 1.6 | 1.6 | 1.1 | 1.1 | 0.7 | 0.6 |
| Snowfall (in) | 5.7 | 5.1 | 5.1 | 3.7 | 0.5 | — | — | — | 0.5 | 3.3 | 5.4 | 5.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 44 | 48 | 59 | 66 | 75 | 86 |
| Avg temp (°F) | 31 | 34 | 44 | 51 | 60 | 70 |
| Avg low (°F) | 18 | 20 | 28 | 35 | 45 | 54 |
| Precipitation (in) | 0.5 | 0.5 | 0.9 | 1.8 | 2.7 | 1.8 |
| Snowfall (in) | 5.7 | 5.1 | 5.1 | 3.7 | 0.5 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 92 | 89 | 82 | 68 | 54 | 43 |
| Avg temp (°F) | 76 | 73 | 65 | 52 | 40 | 31 |
| Avg low (°F) | 59 | 57 | 49 | 37 | 26 | 18 |
| Precipitation (in) | 1.6 | 1.6 | 1.1 | 1.1 | 0.7 | 0.6 |
| Snowfall (in) | — | — | 0.5 | 3.3 | 5.4 | 5.6 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 4 | 5 | 8 | 11 | 8 | 7 | 7 | 6 | 6 | 4 | 4 |
| Days with high ≥ 90°F (days) | — | — | — | 0.2 | 2 | 11 | 19 | 16 | 7 | 0.2 | — | — |
| Days with low ≤ 32°F (days) | 30 | 26 | 22 | 10 | 2 | — | — | — | 0.4 | 9 | 24 | 30 |
| Days with snowfall ≥ 1 in (days) | 2 | 2 | 2 | 1 | 0.2 | — | — | — | 0.2 | 0.7 | 2 | 2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 4 | 5 | 8 | 11 | 8 |
| Days with high ≥ 90°F (days) | — | — | — | 0.2 | 2 | 11 |
| Days with low ≤ 32°F (days) | 30 | 26 | 22 | 10 | 2 | — |
| Days with snowfall ≥ 1 in (days) | 2 | 2 | 2 | 1 | 0.2 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 7 | 7 | 6 | 6 | 4 | 4 |
| Days with high ≥ 90°F (days) | 19 | 16 | 7 | 0.2 | — | — |
| Days with low ≤ 32°F (days) | — | — | 0.4 | 9 | 24 | 30 |
| Days with snowfall ≥ 1 in (days) | — | — | 0.2 | 0.7 | 2 | 2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 65 | 63 | 60 | 62 | 61 | 50 | 50 | 51 | 46 | 51 | 57 | 63 |
| Clear days (≤ 30% cloud) | 4 | 4 | 6 | 5 | 5 | 8 | 8 | 8 | 11 | 10 | 7 | 4 |
| Partly cloudy days (30–70%) | 12 | 11 | 12 | 11 | 12 | 14 | 15 | 14 | 10 | 11 | 12 | 12 |
| Cloudy days (≥ 70%) | 15 | 13 | 13 | 14 | 14 | 8 | 8 | 9 | 8 | 10 | 12 | 15 |
| Relative humidity (%) | 57 | 57 | 53 | 51 | 51 | 44 | 44 | 45 | 44 | 49 | 53 | 58 |
| Wind speed (mph) | 7.2 | 6.8 | 6.6 | 6.5 | 5.4 | 5.0 | 4.8 | 4.6 | 4.7 | 5.3 | 5.9 | 6.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 65 | 63 | 60 | 62 | 61 | 50 |
| Clear days (≤ 30% cloud) | 4 | 4 | 6 | 5 | 5 | 8 |
| Partly cloudy days (30–70%) | 12 | 11 | 12 | 11 | 12 | 14 |
| Cloudy days (≥ 70%) | 15 | 13 | 13 | 14 | 14 | 8 |
| Relative humidity (%) | 57 | 57 | 53 | 51 | 51 | 44 |
| Wind speed (mph) | 7.2 | 6.8 | 6.6 | 6.5 | 5.4 | 5.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 50 | 51 | 46 | 51 | 57 | 63 |
| Clear days (≤ 30% cloud) | 8 | 8 | 11 | 10 | 7 | 4 |
| Partly cloudy days (30–70%) | 15 | 14 | 10 | 11 | 12 | 12 |
| Cloudy days (≥ 70%) | 8 | 9 | 8 | 10 | 12 | 15 |
| Relative humidity (%) | 44 | 45 | 44 | 49 | 53 | 58 |
| Wind speed (mph) | 4.8 | 4.6 | 4.7 | 5.3 | 5.9 | 6.6 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Greeley Unc (NOAA GHCN station USC00053553), about 2 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.