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Monthly climate in Barstow, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Barstow features a cold semi-arid climate (BSk).Temperatures typically range between 8 °C (47 °F) and 31 °C (89 °F) through the year, but rarely can drop to -4 °C (25 °F) or can rise to as high as 45 °C (113 °F).The average annual precipitation amounts to about 98 mm (3.9 inches) and receives 13 rainy days on the 1 mm (0.04 inches) threshold annually.Barstow enjoys an average of 3676 hours of sunshine throughout the year, and daylight varies from 9 hours 50 minutes to 14 hours 26 minutes per day.

Monthly average temperatures in Barstow, California, United States §

The warmest months in Barstow are June, July and August, with daily mean temperatures ranging from 28 to 31 °C (83 - 89 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 8 to 11 °C (47 - 51 °F) throughout the day. On average each year, Barstow experiences 165 days above 25 °C (77.0 °F) and 10 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Barstow, California, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 23°C
(73°F)		 25°C
(78°F)		 31°C
(89°F)		 35°C
(96°F)		 40°C
(104°F)		 44°C
(111°F)		 45°C
(113°F)		 43°C
(110°F)		 43°C
(110°F)		 37°C
(99°F)		 29°C
(84°F)		 23°C
(74°F)
Mean maximum 21°C
(69°F)		 23°C
(74°F)		 28°C
(82°F)		 33°C
(91°F)		 36°C
(97°F)		 39°C
(103°F)		 43°C
(109°F)		 41°C
(107°F)		 41°C
(105°F)		 33°C
(91°F)		 27°C
(81°F)		 21°C
(71°F)
Average high 15°C
(60°F)		 17°C
(63°F)		 20°C
(68°F)		 25°C
(78°F)		 29°C
(84°F)		 35°C
(96°F)		 39°C
(102°F)		 38°C
(101°F)		 34°C
(93°F)		 26°C
(80°F)		 21°C
(69°F)		 14°C
(58°F)
Daily mean 9°C
(49°F)		 11°C
(51°F)		 14°C
(57°F)		 18°C
(65°F)		 22°C
(71°F)		 28°C
(83°F)		 31°C
(89°F)		 31°C
(88°F)		 27°C
(80°F)		 19°C
(67°F)		 14°C
(57°F)		 8°C
(47°F)
Average low 4°C
(39°F)		 5°C
(41°F)		 7°C
(46°F)		 12°C
(53°F)		 15°C
(59°F)		 20°C
(69°F)		 24°C
(76°F)		 23°C
(74°F)		 19°C
(66°F)		 12°C
(53°F)		 7°C
(45°F)		 3°C
(38°F)
Mean minimum -1°C
(30°F)		 -2°C
(28°F)		 1°C
(34°F)		 5°C
(41°F)		 7°C
(45°F)		 13°C
(55°F)		 19°C
(67°F)		 17°C
(63°F)		 12°C
(53°F)		 5°C
(41°F)		 1°C
(34°F)		 -2°C
(29°F)
Minimum -2°C
(29°F)		 -4°C
(25°F)		 -1°C
(30°F)		 3°C
(38°F)		 5°C
(42°F)		 10°C
(51°F)		 17°C
(63°F)		 15°C
(60°F)		 7°C
(45°F)		 2°C
(35°F)		 -2°C
(29°F)		 -3°C
(27°F)

Compare climate in Barstow with other places

Compare temperature, precipitation, sunshine, UV index in Barstow, California, United States with other places around the world.

Monthly average precipitation in Barstow, California, United States §

Barstow usually has the most precipitation in January, March and December, with an average of 2 rainy days and 19 mm (0.8 inches) of precipitation per month.The driest months in Barstow are June, August and September. On average, 1 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Barstow, California, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 22 (0.9) 13 (0.5) 17 (0.7) 11 (0.4) 3 (0.1) 1 (0.0) 3 (0.1) 1 (0.0) 1 (0.0) 2 (0.1) 6 (0.2) 19 (0.7)
Average precipitation days (≥ 1 mm) 3 2 3 1 1 0 1 0 0 0 0 2

Monthly sunshine hours in Barstow, California, United States §

The sunniest months in Barstow are May, June and July, when the sun shines an average of 12 hours 21 minutes a day.Least sunny months in Barstow: January, February and December receive an average of 7 hours 18 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Barstow, California, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 188 245 299 329 371 380 384 363 322 300 259 230
Mean daily daylight hours 10h 6m 10h 55m 11h 59m 13h 5m 14h 0m 14h 26m 14h 12m 13h 23m 12h 20m 11h 15m 10h 18m 9h 50m

Solar UV radiation in Barstow, California, United States §

Barstow experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure.January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Barstow UV Index data.

Average daily maximum UV levels by month for Barstow, California, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 4 6 9 10 11 12 12 11 10 8 5 4