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Monthly climate in Upper Lake, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Upper Lake features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 7 °C (44 °F) and 24 °C (76 °F) through the year, but rarely can drop to -5 °C (22 °F) or can rise to as high as 40 °C (105 °F).The average annual precipitation amounts to about 816 mm (32.1 inches) and receives 66 rainy days on the 1 mm (0.04 inches) threshold annually.Upper Lake enjoys an average of 3368 hours of sunshine throughout the year, and daylight varies from 9 hours 26 minutes to 14 hours 51 minutes per day.

Monthly average temperatures in Upper Lake, California, United States §

The warmest months in Upper Lake are June, July and August, with daily mean temperatures ranging from 20 to 24 °C (69 - 76 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 7 to 7 °C (44 - 46 °F) throughout the day. On average each year, Upper Lake experiences 112 days above 25 °C (77.0 °F) and 28 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Upper Lake, 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
(77°F)		 26°C
(80°F)		 30°C
(87°F)		 32°C
(89°F)		 39°C
(103°F)		 38°C
(101°F)		 39°C
(103°F)		 40°C
(105°F)		 34°C
(94°F)		 27°C
(80°F)		 22°C
(72°F)
Mean maximum 19°C
(67°F)		 21°C
(71°F)		 24°C
(75°F)		 27°C
(81°F)		 31°C
(87°F)		 35°C
(95°F)		 36°C
(98°F)		 37°C
(99°F)		 37°C
(99°F)		 30°C
(87°F)		 24°C
(76°F)		 19°C
(66°F)
Average high 12°C
(53°F)		 14°C
(57°F)		 14°C
(58°F)		 18°C
(65°F)		 22°C
(72°F)		 28°C
(82°F)		 32°C
(90°F)		 32°C
(89°F)		 29°C
(84°F)		 23°C
(75°F)		 17°C
(62°F)		 12°C
(54°F)
Daily mean 7°C
(44°F)		 7°C
(46°F)		 8°C
(47°F)		 12°C
(53°F)		 15°C
(59°F)		 20°C
(69°F)		 24°C
(76°F)		 24°C
(75°F)		 20°C
(69°F)		 15°C
(60°F)		 10°C
(50°F)		 7°C
(44°F)
Average low 3°C
(37°F)		 2°C
(36°F)		 3°C
(38°F)		 6°C
(43°F)		 9°C
(49°F)		 13°C
(56°F)		 17°C
(62°F)		 17°C
(63°F)		 13°C
(56°F)		 9°C
(48°F)		 5°C
(41°F)		 2°C
(36°F)
Mean minimum -3°C
(27°F)		 -3°C
(26°F)		 -3°C
(28°F)		 -1°C
(31°F)		 3°C
(38°F)		 6°C
(43°F)		 13°C
(55°F)		 13°C
(56°F)		 7°C
(44°F)		 4°C
(39°F)		 -1°C
(30°F)		 -3°C
(28°F)
Minimum -5°C
(23°F)		 -5°C
(24°F)		 -5°C
(22°F)		 -2°C
(28°F)		 -1°C
(30°F)		 5°C
(41°F)		 11°C
(52°F)		 12°C
(54°F)		 3°C
(38°F)		 3°C
(37°F)		 -5°C
(24°F)		 -5°C
(23°F)

Compare climate in Upper Lake with other places

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

Monthly average precipitation in Upper Lake, California, United States §

Upper Lake usually has the most precipitation in January, February and March, with an average of 11 rainy days and 150 mm (5.9 inches) of precipitation per month.The driest months in Upper Lake are June, July and August. On average, 2 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Upper Lake, 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) 164 (6.5) 167 (6.6) 119 (4.7) 65 (2.6) 47 (1.9) 4 (0.1) 0 (0.0) 2 (0.1) 6 (0.2) 52 (2.0) 80 (3.2) 110 (4.3)
Average precipitation days (≥ 1 mm) 12 9 12 8 5 0 0 0 1 3 6 10

Monthly sunshine hours in Upper Lake, California, United States §

The sunniest months in Upper Lake are May, June and July, when the sun shines an average of 12 hours 21 minutes a day.Least sunny months in Upper Lake: January, February and December receive an average of 5 hours 42 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Upper Lake, 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 136 206 259 296 357 383 395 352 311 279 213 176
Mean daily daylight hours 9h 45m 10h 44m 11h 59m 13h 15m 14h 20m 14h 51m 14h 34m 13h 36m 12h 23m 11h 6m 10h 0m 9h 26m

Solar UV radiation in Upper Lake, California, United States §

Upper Lake experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 11 - 11, 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 Upper Lake UV Index data.

Average daily maximum UV levels by month for Upper Lake, 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 7 8 11 11 11 10 9 7 4 3