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Monthly climate in Mount Shasta, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Mount Shasta features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 1 °C (34 °F) and 23 °C (73 °F) through the year, but rarely can drop to -19 °C (-3 °F) or can rise to as high as 37 °C (99 °F).The average annual precipitation amounts to about 1279 mm (50.3 inches) and receives 96 rainy days on the 1 mm (0.04 inches) threshold annually.Mount Shasta enjoys an average of 3236 hours of sunshine throughout the year, and daylight varies from 9 hours 14 minutes to 15 hours 5 minutes per day.

Monthly average temperatures in Mount Shasta, California, United States §

The warmest months in Mount Shasta are June, July and August, with daily mean temperatures ranging from 18 to 23 °C (64 - 73 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 2 °C (34 - 36 °F) throughout the day. On average each year, Mount Shasta experiences 80 days above 25 °C (77.0 °F) and 106 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Mount 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 14°C
(58°F)		 18°C
(64°F)		 20°C
(68°F)		 25°C
(77°F)		 30°C
(86°F)		 35°C
(96°F)		 37°C
(99°F)		 37°C
(98°F)		 36°C
(96°F)		 31°C
(87°F)		 23°C
(73°F)		 17°C
(63°F)
Mean maximum 12°C
(54°F)		 15°C
(59°F)		 17°C
(63°F)		 22°C
(73°F)		 28°C
(82°F)		 31°C
(89°F)		 35°C
(95°F)		 34°C
(94°F)		 32°C
(90°F)		 26°C
(78°F)		 19°C
(67°F)		 12°C
(54°F)
Average high 5°C
(42°F)		 7°C
(45°F)		 9°C
(48°F)		 13°C
(56°F)		 19°C
(66°F)		 25°C
(77°F)		 30°C
(87°F)		 29°C
(85°F)		 25°C
(76°F)		 18°C
(64°F)		 11°C
(51°F)		 5°C
(42°F)
Daily mean 1°C
(35°F)		 2°C
(36°F)		 3°C
(38°F)		 7°C
(45°F)		 12°C
(54°F)		 18°C
(64°F)		 23°C
(73°F)		 22°C
(71°F)		 17°C
(63°F)		 10°C
(51°F)		 5°C
(42°F)		 1°C
(34°F)
Average low -2°C
(29°F)		 -2°C
(28°F)		 -1°C
(30°F)		 1°C
(35°F)		 5°C
(42°F)		 10°C
(50°F)		 14°C
(58°F)		 14°C
(57°F)		 10°C
(50°F)		 4°C
(40°F)		 1°C
(34°F)		 -2°C
(28°F)
Mean minimum -10°C
(14°F)		 -9°C
(15°F)		 -9°C
(17°F)		 -4°C
(24°F)		 -1°C
(30°F)		 2°C
(35°F)		 10°C
(50°F)		 9°C
(48°F)		 2°C
(36°F)		 -2°C
(29°F)		 -7°C
(20°F)		 -8°C
(17°F)
Minimum -19°C
(-3°F)		 -13°C
(8°F)		 -15°C
(6°F)		 -6°C
(22°F)		 -5°C
(24°F)		 -0°C
(32°F)		 8°C
(47°F)		 7°C
(44°F)		 -1°C
(30°F)		 -4°C
(25°F)		 -14°C
(7°F)		 -10°C
(14°F)

Compare climate in Mount Shasta with other places

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

Monthly average precipitation in Mount Shasta, California, United States §

Mount Shasta usually has the most precipitation in January, February and March, with an average of 13 rainy days and 216 mm (8.5 inches) of precipitation per month.The driest months in Mount Shasta are July, August and September. On average, 12 mm (0.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Mount 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) 227 (8.9) 218 (8.6) 204 (8.0) 121 (4.8) 87 (3.4) 27 (1.1) 5 (0.2) 9 (0.4) 23 (0.9) 76 (3.0) 128 (5.1) 153 (6.0)
Average precipitation days (≥ 1 mm) 13 11 16 10 9 4 1 2 4 5 9 12

Monthly sunshine hours in Mount Shasta, California, United States §

The sunniest months in Mount Shasta are June, July and August, when the sun shines an average of 12 hours 25 minutes a day.Least sunny months in Mount Shasta: January, February and December receive an average of 4 hours 58 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Mount 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 110 182 227 281 351 386 401 355 308 273 195 159
Mean daily daylight hours 9h 34m 10h 38m 11h 58m 13h 21m 14h 30m 15h 5m 14h 45m 13h 43m 12h 24m 11h 2m 9h 50m 9h 14m

Solar UV radiation in Mount Shasta, California, United States §

Mount Shasta experiences the highest level of ultraviolet (UV) radiation in May, June and July, 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 4. For more detailed information, check out our hourly Mount Shasta UV Index data.

Average daily maximum UV levels by month for Mount 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 5 8 9 11 12 11 10 9 7 4 3