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Arvada, Colorado climate
Cfa Humid subtropical
Arvada has a seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 90°F, while the coldest is January averaging around 16°F at night. Precipitation totals about 14 inches a year and is strongly seasonal — May alone averages 2.4 inches while December barely receives 0.37 inches. Winters bring significant snowfall (34 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 countsArvada climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 44 | 46 | 56 | 63 | 72 | 84 | 90 | 88 | 80 | 66 | 53 | 44 |
| Avg temp (°F) | 30 | 32 | 41 | 48 | 58 | 68 | 74 | 72 | 64 | 50 | 39 | 30 |
| Avg low (°F) | 16 | 19 | 27 | 34 | 43 | 52 | 58 | 56 | 47 | 35 | 25 | 16 |
| Precipitation (in) | 0.4 | 0.4 | 1.0 | 1.8 | 2.4 | 1.4 | 1.7 | 1.8 | 1.2 | 1.0 | 0.7 | 0.4 |
| Snowfall (in) | 5.2 | 5.3 | 6.0 | 3.1 | 0.5 | — | — | — | 0.2 | 3.2 | 5.8 | 5.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 44 | 46 | 56 | 63 | 72 | 84 |
| Avg temp (°F) | 30 | 32 | 41 | 48 | 58 | 68 |
| Avg low (°F) | 16 | 19 | 27 | 34 | 43 | 52 |
| Precipitation (in) | 0.4 | 0.4 | 1.0 | 1.8 | 2.4 | 1.4 |
| Snowfall (in) | 5.2 | 5.3 | 6.0 | 3.1 | 0.5 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 90 | 88 | 80 | 66 | 53 | 44 |
| Avg temp (°F) | 74 | 72 | 64 | 50 | 39 | 30 |
| Avg low (°F) | 58 | 56 | 47 | 35 | 25 | 16 |
| Precipitation (in) | 1.7 | 1.8 | 1.2 | 1.0 | 0.7 | 0.4 |
| Snowfall (in) | — | — | 0.2 | 3.2 | 5.8 | 5.2 |
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 | 6 | 7 | 8 | 7 | 7 | 6 | 5 | 5 | 4 | 4 |
| Days with high ≥ 90°F (days) | — | — | — | 0.1 | 1 | 9 | 18 | 14 | 5 | 0.0 | — | — |
| Days with low ≤ 32°F (days) | 30 | 27 | 24 | 12 | 2 | — | — | — | 0.6 | 10 | 25 | 29 |
| Days with snowfall ≥ 1 in (days) | 2 | 2 | 2 | 1 | 0.2 | — | — | — | 0.1 | 0.8 | 2 | 2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 4 | 6 | 7 | 8 | 7 |
| Days with high ≥ 90°F (days) | — | — | — | 0.1 | 1 | 9 |
| Days with low ≤ 32°F (days) | 30 | 27 | 24 | 12 | 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 | 6 | 5 | 5 | 4 | 4 |
| Days with high ≥ 90°F (days) | 18 | 14 | 5 | 0.0 | — | — |
| Days with low ≤ 32°F (days) | — | — | 0.6 | 10 | 25 | 29 |
| Days with snowfall ≥ 1 in (days) | — | — | 0.1 | 0.8 | 2 | 2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 57 | 57 | 56 | 59 | 58 | 49 | 50 | 50 | 43 | 46 | 51 | 55 |
| Clear days (≤ 30% cloud) | 6 | 6 | 7 | 6 | 5 | 8 | 8 | 8 | 12 | 11 | 9 | 7 |
| Partly cloudy days (30–70%) | 14 | 13 | 13 | 12 | 14 | 15 | 16 | 14 | 11 | 11 | 12 | 14 |
| Cloudy days (≥ 70%) | 12 | 10 | 11 | 12 | 12 | 7 | 7 | 9 | 7 | 9 | 10 | 10 |
| Relative humidity (%) | 56 | 56 | 52 | 50 | 50 | 42 | 43 | 44 | 43 | 47 | 52 | 57 |
| Wind speed (mph) | 6.4 | 6.2 | 6.0 | 6.0 | 5.1 | 4.9 | 4.9 | 4.7 | 4.6 | 4.9 | 5.3 | 5.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 57 | 57 | 56 | 59 | 58 | 49 |
| Clear days (≤ 30% cloud) | 6 | 6 | 7 | 6 | 5 | 8 |
| Partly cloudy days (30–70%) | 14 | 13 | 13 | 12 | 14 | 15 |
| Cloudy days (≥ 70%) | 12 | 10 | 11 | 12 | 12 | 7 |
| Relative humidity (%) | 56 | 56 | 52 | 50 | 50 | 42 |
| Wind speed (mph) | 6.4 | 6.2 | 6.0 | 6.0 | 5.1 | 4.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 50 | 50 | 43 | 46 | 51 | 55 |
| Clear days (≤ 30% cloud) | 8 | 8 | 12 | 11 | 9 | 7 |
| Partly cloudy days (30–70%) | 16 | 14 | 11 | 11 | 12 | 14 |
| Cloudy days (≥ 70%) | 7 | 9 | 7 | 9 | 10 | 10 |
| Relative humidity (%) | 43 | 44 | 43 | 47 | 52 | 57 |
| Wind speed (mph) | 4.9 | 4.7 | 4.6 | 4.9 | 5.3 | 5.8 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Brighton 3 SE (NOAA GHCN station USC00050950), about 27 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.