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Winslow, Arizona climate
BWk Cold desert
Winslow has a seasonal mild-temperate climate (Cold desert, Köppen BWk). The hottest month is July with an average daily high near 35°C, while the coldest is December averaging around −6°C at night. Precipitation totals about 166 mm a year and is strongly seasonal — August alone averages 29 mm while June barely receives 4 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Winslow climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 13 | 18 | 22 | 27 | 34 | 35 | 33 | 30 | 23 | 16 | 9 |
| Avg temp (°C) | 2 | 5 | 9 | 13 | 18 | 23 | 26 | 25 | 21 | 14 | 7 | 2 |
| Avg low (°C) | −6 | −3 | 0 | 3 | 8 | 13 | 18 | 17 | 12 | 5 | −2 | −6 |
| Precipitation (mm) | 13 | 11 | 12 | 6 | 8 | 4 | 23 | 29 | 22 | 13 | 12 | 13 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 13 | 18 | 22 | 27 | 34 |
| Avg temp (°C) | 2 | 5 | 9 | 13 | 18 | 23 |
| Avg low (°C) | −6 | −3 | 0 | 3 | 8 | 13 |
| Precipitation (mm) | 13 | 11 | 12 | 6 | 8 | 4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 35 | 33 | 30 | 23 | 16 | 9 |
| Avg temp (°C) | 26 | 25 | 21 | 14 | 7 | 2 |
| Avg low (°C) | 18 | 17 | 12 | 5 | −2 | −6 |
| Precipitation (mm) | 23 | 29 | 22 | 13 | 12 | 13 |
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 | 4 | 3 | 3 | 1 | 6 | 8 | 5 | 3 | 3 | 4 |
| Days with high ≥ 32°C (days) | — | — | — | 0.2 | 5 | 21 | 26 | 20 | 8 | 0.4 | — | — |
| Days with low ≤ 0°C (days) | 28 | 23 | 18 | 8 | 0.9 | — | — | — | 0.0 | 6 | 21 | 28 |
| Days with snowfall ≥ 2.5 cm (days) | 0.1 | — | 0.1 | — | — | — | — | — | — | — | 0.1 | 0.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 4 | 4 | 3 | 3 | 1 |
| Days with high ≥ 32°C (days) | — | — | — | 0.2 | 5 | 21 |
| Days with low ≤ 0°C (days) | 28 | 23 | 18 | 8 | 0.9 | — |
| Days with snowfall ≥ 2.5 cm (days) | 0.1 | — | 0.1 | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 6 | 8 | 5 | 3 | 3 | 4 |
| Days with high ≥ 32°C (days) | 26 | 20 | 8 | 0.4 | — | — |
| Days with low ≤ 0°C (days) | — | — | 0.0 | 6 | 21 | 28 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | — | 0.1 | 0.1 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 49 | 48 | 46 | 44 | 39 | 29 | 50 | 49 | 32 | 32 | 38 | 49 |
| Relative humidity (%) | 58 | 54 | 47 | 38 | 33 | 24 | 37 | 43 | 41 | 41 | 48 | 57 |
| Wind speed (km/h) | 7.7 | 9.3 | 10.2 | 11.8 | 11.1 | 10.8 | 8.6 | 7.3 | 7.9 | 8.3 | 8.0 | 7.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 49 | 48 | 46 | 44 | 39 | 29 |
| Relative humidity (%) | 58 | 54 | 47 | 38 | 33 | 24 |
| Wind speed (km/h) | 7.7 | 9.3 | 10.2 | 11.8 | 11.1 | 10.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 50 | 49 | 32 | 32 | 38 | 49 |
| Relative humidity (%) | 37 | 43 | 41 | 41 | 48 | 57 |
| Wind speed (km/h) | 8.6 | 7.3 | 7.9 | 8.3 | 8.0 | 7.6 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Winslow AP (NOAA GHCN station USW00023194), 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.