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Monthly climate in Thermalito, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Thermalito features a hot-summer Mediterranean climate (Csa).Temperatures typically range between 9 °C (48 °F) and 28 °C (83 °F) through the year, but rarely can drop to -3 °C (27 °F) or can rise to as high as 44 °C (111 °F).The average annual precipitation amounts to about 1085 mm (42.7 inches) and receives 65 rainy days on the 1 mm (0.04 inches) threshold annually.Thermalito enjoys an average of 3366 hours of sunshine throughout the year, and daylight varies from 9 hours 25 minutes to 14 hours 53 minutes per day.

Monthly average temperatures in Thermalito, California, United States §

The warmest months in Thermalito are June, July and August, with daily mean temperatures ranging from 25 to 28 °C (78 - 83 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 9 to 10 °C (48 - 50 °F) throughout the day. On average each year, Thermalito experiences 148 days above 25 °C (77.0 °F) and 4 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Thermalito, 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
(74°F)		 27°C
(82°F)		 30°C
(86°F)		 32°C
(90°F)		 37°C
(99°F)		 44°C
(111°F)		 42°C
(108°F)		 42°C
(108°F)		 42°C
(108°F)		 36°C
(97°F)		 28°C
(83°F)		 23°C
(73°F)
Mean maximum 20°C
(68°F)		 23°C
(75°F)		 26°C
(80°F)		 30°C
(87°F)		 35°C
(96°F)		 39°C
(103°F)		 41°C
(106°F)		 40°C
(104°F)		 39°C
(102°F)		 33°C
(91°F)		 26°C
(78°F)		 20°C
(68°F)
Average high 14°C
(57°F)		 16°C
(62°F)		 18°C
(64°F)		 22°C
(72°F)		 27°C
(80°F)		 33°C
(91°F)		 36°C
(97°F)		 35°C
(95°F)		 31°C
(88°F)		 26°C
(79°F)		 19°C
(66°F)		 14°C
(57°F)
Daily mean 9°C
(48°F)		 10°C
(50°F)		 12°C
(53°F)		 16°C
(60°F)		 20°C
(68°F)		 25°C
(78°F)		 28°C
(83°F)		 27°C
(80°F)		 23°C
(74°F)		 18°C
(64°F)		 12°C
(54°F)		 9°C
(48°F)
Average low 5°C
(42°F)		 5°C
(41°F)		 6°C
(44°F)		 9°C
(49°F)		 13°C
(56°F)		 18°C
(64°F)		 20°C
(68°F)		 19°C
(66°F)		 16°C
(61°F)		 11°C
(52°F)		 7°C
(45°F)		 4°C
(40°F)
Mean minimum -1°C
(31°F)		 -2°C
(29°F)		 0°C
(33°F)		 3°C
(39°F)		 7°C
(46°F)		 12°C
(54°F)		 16°C
(61°F)		 15°C
(58°F)		 10°C
(50°F)		 5°C
(41°F)		 1°C
(35°F)		 0°C
(33°F)
Minimum -3°C
(28°F)		 -3°C
(27°F)		 -1°C
(31°F)		 1°C
(34°F)		 4°C
(40°F)		 9°C
(49°F)		 15°C
(59°F)		 13°C
(56°F)		 7°C
(44°F)		 4°C
(39°F)		 -0°C
(32°F)		 -0°C
(32°F)

Compare climate in Thermalito with other places

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

Monthly average precipitation in Thermalito, California, United States §

Thermalito usually has the most precipitation in January, February and March, with an average of 11 rainy days and 198 mm (7.8 inches) of precipitation per month.The driest months in Thermalito are June, July and August. On average, 3 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Thermalito, 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) 202 (7.9) 212 (8.4) 180 (7.1) 90 (3.6) 48 (1.9) 6 (0.2) 1 (0.0) 1 (0.0) 10 (0.4) 59 (2.3) 111 (4.4) 166 (6.5)
Average precipitation days (≥ 1 mm) 11 9 13 7 4 1 0 0 1 3 6 10

Monthly sunshine hours in Thermalito, California, United States §

The sunniest months in Thermalito are June, July and August, when the sun shines an average of 12 hours 29 minutes a day.Least sunny months in Thermalito: January, February and December receive an average of 5 hours 38 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Thermalito, 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 132 199 247 291 357 387 399 361 315 281 211 181
Mean daily daylight hours 9h 44m 10h 43m 11h 58m 13h 16m 14h 21m 14h 53m 14h 35m 13h 37m 12h 23m 11h 6m 9h 59m 9h 25m

Solar UV radiation in Thermalito, California, United States §

Thermalito experiences the highest level of ultraviolet (UV) radiation in June, July 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 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 Thermalito UV Index data.

Average daily maximum UV levels by month for Thermalito, 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 11 10 9 6 4 3