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Wasco, California climate
BWh Hot desert
Wasco has a seasonal warm-temperate climate (Hot desert, Köppen BWh). The hottest month is July with an average daily high near 38°C, while the coldest is December averaging around 3°C at night. Precipitation totals about 181 mm a year and is strongly seasonal — March alone averages 35 mm while July barely receives 0 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 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 countsWasco climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 15 | 18 | 22 | 25 | 30 | 34 | 38 | 37 | 34 | 28 | 20 | 15 |
| Avg temp (°C) | 9 | 12 | 15 | 18 | 22 | 26 | 29 | 28 | 25 | 20 | 13 | 9 |
| Avg low (°C) | 4 | 6 | 8 | 10 | 14 | 17 | 20 | 19 | 17 | 12 | 7 | 3 |
| Precipitation (mm) | 33 | 29 | 35 | 16 | 7 | 3 | 0 | 1 | 1 | 13 | 15 | 28 |
| Snowfall (cm) | 1 | — | — | — | — | — | — | — | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 15 | 18 | 22 | 25 | 30 | 34 |
| Avg temp (°C) | 9 | 12 | 15 | 18 | 22 | 26 |
| Avg low (°C) | 4 | 6 | 8 | 10 | 14 | 17 |
| Precipitation (mm) | 33 | 29 | 35 | 16 | 7 | 3 |
| Snowfall (cm) | 1 | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 38 | 37 | 34 | 28 | 20 | 15 |
| Avg temp (°C) | 29 | 28 | 25 | 20 | 13 | 9 |
| Avg low (°C) | 20 | 19 | 17 | 12 | 7 | 3 |
| Precipitation (mm) | 0 | 1 | 1 | 13 | 15 | 28 |
| Snowfall (cm) | — | — | — | — | — | — |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 6 | 5 | 5 | 3 | 1 | 0.3 | 0.1 | 0.1 | 0.3 | 1 | 3 | 5 |
| Days with high ≥ 32°C (days) | — | — | 0.2 | 2 | 10 | 19 | 26 | 27 | 19 | 5 | — | — |
| Days with low ≤ 0°C (days) | 7 | 3 | 0.4 | 0.1 | — | — | — | — | — | — | 2 | 9 |
| Days with snowfall ≥ 2.5 cm (days) | 0.0 | — | — | — | — | — | — | — | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 6 | 5 | 5 | 3 | 1 | 0.3 |
| Days with high ≥ 32°C (days) | — | — | 0.2 | 2 | 10 | 19 |
| Days with low ≤ 0°C (days) | 7 | 3 | 0.4 | 0.1 | — | — |
| Days with snowfall ≥ 2.5 cm (days) | 0.0 | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 0.1 | 0.1 | 0.3 | 1 | 3 | 5 |
| Days with high ≥ 32°C (days) | 26 | 27 | 19 | 5 | — | — |
| Days with low ≤ 0°C (days) | — | — | — | — | 2 | 9 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | — | — | — |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 57 | 49 | 44 | 35 | 27 | 16 | 14 | 12 | 14 | 25 | 39 | 50 |
| Clear days (≤ 30% cloud) | 7 | 10 | 12 | 16 | 20 | 25 | 27 | 28 | 25 | 21 | 13 | 9 |
| Partly cloudy days (30–70%) | 12 | 10 | 11 | 10 | 8 | 3 | 3 | 3 | 4 | 7 | 12 | 13 |
| Cloudy days (≥ 70%) | 12 | 9 | 8 | 5 | 3 | 2 | 1 | 0.7 | 1 | 3 | 6 | 9 |
| Relative humidity (%) | 64 | 66 | 65 | 57 | 47 | 35 | 28 | 28 | 32 | 41 | 52 | 60 |
| Wind speed (km/h) | 5.2 | 5.7 | 6.0 | 7.2 | 7.7 | 8.0 | 7.5 | 6.7 | 6.2 | 5.7 | 5.1 | 5.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 57 | 49 | 44 | 35 | 27 | 16 |
| Clear days (≤ 30% cloud) | 7 | 10 | 12 | 16 | 20 | 25 |
| Partly cloudy days (30–70%) | 12 | 10 | 11 | 10 | 8 | 3 |
| Cloudy days (≥ 70%) | 12 | 9 | 8 | 5 | 3 | 2 |
| Relative humidity (%) | 64 | 66 | 65 | 57 | 47 | 35 |
| Wind speed (km/h) | 5.2 | 5.7 | 6.0 | 7.2 | 7.7 | 8.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 14 | 12 | 14 | 25 | 39 | 50 |
| Clear days (≤ 30% cloud) | 27 | 28 | 25 | 21 | 13 | 9 |
| Partly cloudy days (30–70%) | 3 | 3 | 4 | 7 | 12 | 13 |
| Cloudy days (≥ 70%) | 1 | 0.7 | 1 | 3 | 6 | 9 |
| Relative humidity (%) | 28 | 28 | 32 | 41 | 52 | 60 |
| Wind speed (km/h) | 7.5 | 6.7 | 6.2 | 5.7 | 5.1 | 5.4 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Wasco (NOAA GHCN station USC00049452), about 1 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.