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Monthly climate in Shasta, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Shasta features a hot-summer Mediterranean climate (Csa).Temperatures typically range between 8 °C (46 °F) and 30 °C (86 °F) through the year, but rarely can drop to -3 °C (27 °F) or can rise to as high as 44 °C (112 °F).The average annual precipitation amounts to about 1101 mm (43.3 inches) and receives 72 rainy days on the 1 mm (0.04 inches) threshold annually.Shasta enjoys an average of 3325 hours of sunshine throughout the year, and daylight varies from 9 hours 18 minutes to 15 hours 0 minutes per day.

Monthly average temperatures in Shasta, California, United States §

The warmest months in Shasta are June, July and August, with daily mean temperatures ranging from 25 to 30 °C (78 - 86 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 8 to 9 °C (46 - 49 °F) throughout the day. On average each year, Shasta experiences 145 days above 25 °C (77.0 °F) and 5 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Shasta, 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 21°C
(70°F)		 27°C
(81°F)		 27°C
(81°F)		 33°C
(91°F)		 38°C
(101°F)		 43°C
(109°F)		 44°C
(111°F)		 44°C
(112°F)		 43°C
(109°F)		 38°C
(101°F)		 29°C
(84°F)		 22°C
(73°F)
Mean maximum 20°C
(68°F)		 23°C
(74°F)		 25°C
(78°F)		 30°C
(87°F)		 36°C
(97°F)		 40°C
(104°F)		 42°C
(109°F)		 42°C
(107°F)		 40°C
(104°F)		 33°C
(91°F)		 26°C
(80°F)		 19°C
(67°F)
Average high 13°C
(56°F)		 16°C
(60°F)		 17°C
(63°F)		 22°C
(71°F)		 27°C
(81°F)		 33°C
(92°F)		 37°C
(99°F)		 36°C
(97°F)		 32°C
(90°F)		 25°C
(78°F)		 18°C
(65°F)		 13°C
(55°F)
Daily mean 8°C
(47°F)		 9°C
(49°F)		 11°C
(52°F)		 15°C
(59°F)		 20°C
(68°F)		 25°C
(78°F)		 30°C
(86°F)		 28°C
(83°F)		 24°C
(75°F)		 17°C
(64°F)		 12°C
(54°F)		 8°C
(46°F)
Average low 5°C
(40°F)		 4°C
(40°F)		 6°C
(43°F)		 9°C
(48°F)		 13°C
(55°F)		 18°C
(64°F)		 21°C
(71°F)		 21°C
(69°F)		 16°C
(62°F)		 11°C
(52°F)		 7°C
(45°F)		 4°C
(40°F)
Mean minimum -1°C
(31°F)		 -1°C
(30°F)		 0°C
(33°F)		 3°C
(37°F)		 6°C
(44°F)		 10°C
(51°F)		 17°C
(63°F)		 17°C
(63°F)		 10°C
(50°F)		 6°C
(43°F)		 2°C
(35°F)		 -0°C
(32°F)
Minimum -3°C
(27°F)		 -3°C
(27°F)		 -0°C
(32°F)		 1°C
(35°F)		 3°C
(38°F)		 8°C
(47°F)		 16°C
(61°F)		 15°C
(59°F)		 7°C
(44°F)		 5°C
(41°F)		 -1°C
(31°F)		 -1°C
(30°F)

Compare climate in Shasta with other places

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

Monthly average precipitation in Shasta, California, United States §

Shasta usually has the most precipitation in January, February and March, with an average of 11 rainy days and 197 mm (7.8 inches) of precipitation per month.The driest months in Shasta are June, July and August. On average, 4 mm (0.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Shasta, 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) 213 (8.4) 192 (7.5) 187 (7.4) 92 (3.6) 59 (2.3) 8 (0.3) 1 (0.0) 2 (0.1) 9 (0.3) 66 (2.6) 123 (4.8) 149 (5.9)
Average precipitation days (≥ 1 mm) 12 9 14 8 5 1 0 0 1 4 7 11

Monthly sunshine hours in Shasta, California, United States §

The sunniest months in Shasta are May, June and July, when the sun shines an average of 12 hours 28 minutes a day.Least sunny months in Shasta: January, February and December receive an average of 5 hours 23 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Shasta, 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 126 194 241 292 358 387 400 353 311 279 208 170
Mean daily daylight hours 9h 38m 10h 40m 11h 58m 13h 19m 14h 27m 15h 0m 14h 42m 13h 41m 12h 24m 11h 3m 9h 53m 9h 18m

Solar UV radiation in Shasta, California, United States §

Shasta experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure.January, February and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly Shasta UV Index data.

Average daily maximum UV levels by month for Shasta, 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) 3 4 7 8 10 11 10 10 9 6 4 2