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Barstow Heights, California climate
BWh Hot desert
Barstow Heights has a seasonal warm-temperate climate (Hot desert, Köppen BWh). The hottest month is July with an average daily high near 102°F, while the coldest is December averaging around 35°F at night. Precipitation totals about 5 inches a year and is strongly seasonal — February alone averages 1.0 inches while June barely receives 0.04 inches.
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 countsBarstow Heights climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 59 | 63 | 70 | 77 | 86 | 96 | 102 | 101 | 93 | 81 | 68 | 57 |
| Avg temp (°F) | 47 | 51 | 57 | 63 | 71 | 81 | 87 | 86 | 78 | 67 | 55 | 46 |
| Avg low (°F) | 35 | 39 | 44 | 49 | 57 | 65 | 72 | 70 | 63 | 53 | 42 | 35 |
| Precipitation (in) | 0.8 | 1.0 | 0.6 | 0.3 | 0.1 | 0.0 | 0.3 | 0.2 | 0.3 | 0.4 | 0.4 | 0.8 |
| Snowfall (in) | — | — | — | — | — | — | — | — | — | — | — | 0.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 59 | 63 | 70 | 77 | 86 | 96 |
| Avg temp (°F) | 47 | 51 | 57 | 63 | 71 | 81 |
| Avg low (°F) | 35 | 39 | 44 | 49 | 57 | 65 |
| Precipitation (in) | 0.8 | 1.0 | 0.6 | 0.3 | 0.1 | 0.0 |
| Snowfall (in) | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 102 | 101 | 93 | 81 | 68 | 57 |
| Avg temp (°F) | 87 | 86 | 78 | 67 | 55 | 46 |
| Avg low (°F) | 72 | 70 | 63 | 53 | 42 | 35 |
| Precipitation (in) | 0.3 | 0.2 | 0.3 | 0.4 | 0.4 | 0.8 |
| Snowfall (in) | — | — | — | — | — | 0.3 |
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 | 2 | 1 | 0.7 | 0.2 | 1 | 0.9 | 0.9 | 1 | 2 | 3 |
| Days with high ≥ 90°F (days) | — | — | 0.2 | 3 | 12 | 24 | 29 | 30 | 24 | 6 | — | — |
| Days with low ≤ 32°F (days) | 9 | 4 | 1 | 0.2 | — | — | — | — | — | — | 3 | 12 |
| Days with snowfall ≥ 1 in (days) | — | — | — | — | — | — | — | — | — | — | — | 0.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 4 | 2 | 1 | 0.7 | 0.2 |
| Days with high ≥ 90°F (days) | — | — | 0.2 | 3 | 12 | 24 |
| Days with low ≤ 32°F (days) | 9 | 4 | 1 | 0.2 | — | — |
| Days with snowfall ≥ 1 in (days) | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 1 | 0.9 | 0.9 | 1 | 2 | 3 |
| Days with high ≥ 90°F (days) | 29 | 30 | 24 | 6 | — | — |
| Days with low ≤ 32°F (days) | — | — | — | — | 3 | 12 |
| Days with snowfall ≥ 1 in (days) | — | — | — | — | — | 0.1 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 46 | 43 | 38 | 31 | 26 | 16 | 19 | 16 | 16 | 24 | 33 | 43 |
| Clear days (≤ 30% cloud) | 11 | 12 | 15 | 17 | 20 | 25 | 24 | 26 | 24 | 22 | 17 | 13 |
| Partly cloudy days (30–70%) | 12 | 9 | 11 | 9 | 9 | 4 | 5 | 5 | 4 | 6 | 9 | 11 |
| Cloudy days (≥ 70%) | 8 | 7 | 6 | 4 | 2 | 1 | 2 | 0.9 | 1 | 3 | 4 | 7 |
| Relative humidity (%) | 53 | 53 | 49 | 42 | 36 | 26 | 24 | 24 | 28 | 33 | 41 | 51 |
| Wind speed (mph) | 5.2 | 6.1 | 6.9 | 8.1 | 8.4 | 8.7 | 7.7 | 6.9 | 6.1 | 5.9 | 5.4 | 5.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 46 | 43 | 38 | 31 | 26 | 16 |
| Clear days (≤ 30% cloud) | 11 | 12 | 15 | 17 | 20 | 25 |
| Partly cloudy days (30–70%) | 12 | 9 | 11 | 9 | 9 | 4 |
| Cloudy days (≥ 70%) | 8 | 7 | 6 | 4 | 2 | 1 |
| Relative humidity (%) | 53 | 53 | 49 | 42 | 36 | 26 |
| Wind speed (mph) | 5.2 | 6.1 | 6.9 | 8.1 | 8.4 | 8.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 19 | 16 | 16 | 24 | 33 | 43 |
| Clear days (≤ 30% cloud) | 24 | 26 | 24 | 22 | 17 | 13 |
| Partly cloudy days (30–70%) | 5 | 5 | 4 | 6 | 9 | 11 |
| Cloudy days (≥ 70%) | 2 | 0.9 | 1 | 3 | 4 | 7 |
| Relative humidity (%) | 24 | 24 | 28 | 33 | 41 | 51 |
| Wind speed (mph) | 7.7 | 6.9 | 6.1 | 5.9 | 5.4 | 5.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Barstow (NOAA GHCN station USC00040521), about 4 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.