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Monthly climate in Boonville, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Boonville features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 8 °C (46 °F) and 22 °C (71 °F) through the year, but rarely can drop to -4 °C (25 °F) or can rise to as high as 41 °C (106 °F).The average annual precipitation amounts to about 817 mm (32.2 inches) and receives 64 rainy days on the 1 mm (0.04 inches) threshold annually.Boonville enjoys an average of 3368 hours of sunshine throughout the year, and daylight varies from 9 hours 27 minutes to 14 hours 50 minutes per day.

Monthly average temperatures in Boonville, California, United States §

The warmest months in Boonville are July, August and September, with daily mean temperatures ranging from 20 to 22 °C (68 - 71 °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 - 48 °F) throughout the day. On average each year, Boonville experiences 103 days above 25 °C (77.0 °F) and 13 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Boonville, 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)		 27°C
(80°F)		 27°C
(81°F)		 30°C
(86°F)		 33°C
(92°F)		 39°C
(102°F)		 37°C
(99°F)		 38°C
(100°F)		 41°C
(106°F)		 36°C
(97°F)		 27°C
(81°F)		 22°C
(72°F)
Mean maximum 20°C
(68°F)		 22°C
(72°F)		 25°C
(77°F)		 27°C
(80°F)		 30°C
(87°F)		 34°C
(93°F)		 35°C
(95°F)		 36°C
(96°F)		 37°C
(99°F)		 31°C
(88°F)		 24°C
(76°F)		 20°C
(68°F)
Average high 13°C
(56°F)		 15°C
(59°F)		 15°C
(60°F)		 18°C
(65°F)		 21°C
(71°F)		 26°C
(80°F)		 29°C
(85°F)		 29°C
(85°F)		 28°C
(82°F)		 24°C
(75°F)		 17°C
(64°F)		 13°C
(56°F)
Daily mean 8°C
(47°F)		 9°C
(48°F)		 10°C
(49°F)		 12°C
(54°F)		 15°C
(59°F)		 19°C
(67°F)		 22°C
(71°F)		 22°C
(71°F)		 20°C
(68°F)		 16°C
(61°F)		 11°C
(52°F)		 8°C
(46°F)
Average low 4°C
(40°F)		 4°C
(39°F)		 5°C
(40°F)		 7°C
(45°F)		 9°C
(49°F)		 13°C
(55°F)		 15°C
(59°F)		 15°C
(60°F)		 13°C
(56°F)		 9°C
(48°F)		 5°C
(42°F)		 4°C
(39°F)
Mean minimum -1°C
(30°F)		 -2°C
(29°F)		 -1°C
(31°F)		 2°C
(36°F)		 5°C
(41°F)		 7°C
(45°F)		 11°C
(53°F)		 12°C
(54°F)		 8°C
(46°F)		 4°C
(40°F)		 -1°C
(31°F)		 -1°C
(30°F)
Minimum -2°C
(28°F)		 -4°C
(25°F)		 -2°C
(29°F)		 0°C
(33°F)		 2°C
(36°F)		 6°C
(43°F)		 10°C
(51°F)		 10°C
(51°F)		 5°C
(42°F)		 2°C
(36°F)		 -2°C
(29°F)		 -1°C
(30°F)

Compare climate in Boonville with other places

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

Monthly average precipitation in Boonville, California, United States §

Boonville usually has the most precipitation in January, February and March, with an average of 10 rainy days and 152 mm (6.0 inches) of precipitation per month.The driest months in Boonville are June, July and August. On average, 1 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Boonville, 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 (6.4) 168 (6.6) 126 (4.9) 67 (2.6) 45 (1.8) 2 (0.1) 1 (0.0) 1 (0.0) 4 (0.2) 51 (2.0) 81 (3.2) 109 (4.3)
Average precipitation days (≥ 1 mm) 11 9 12 8 4 0 0 0 1 2 7 10

Monthly sunshine hours in Boonville, California, United States §

The sunniest months in Boonville are May, June and July, when the sun shines an average of 12 hours 21 minutes a day.Least sunny months in Boonville: 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 Boonville, 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 46m 10h 44m 11h 59m 13h 15m 14h 19m 14h 50m 14h 33m 13h 36m 12h 23m 11h 7m 10h 1m 9h 27m

Solar UV radiation in Boonville, California, United States §

Boonville 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 Boonville UV Index data.

Average daily maximum UV levels by month for Boonville, 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