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Monthly climate in Rio Vista, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Rio Vista features a hot-summer Mediterranean climate (Csa).Temperatures typically range between 10 °C (50 °F) and 23 °C (74 °F) through the year, but rarely can drop to -2 °C (30 °F) or can rise to as high as 42 °C (108 °F).The average annual precipitation amounts to about 504 mm (19.8 inches) and receives 45 rainy days on the 1 mm (0.04 inches) threshold annually.Rio Vista enjoys an average of 3443 hours of sunshine throughout the year, and daylight varies from 9 hours 32 minutes to 14 hours 45 minutes per day.

Monthly average temperatures in Rio Vista, California, United States §

The warmest months in Rio Vista are June, July and August, with daily mean temperatures ranging from 23 to 23 °C (73 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 10 to 12 °C (50 - 53 °F) throughout the day. On average each year, Rio Vista experiences 151 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Rio Vista, 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 25°C
(78°F)		 26°C
(79°F)		 30°C
(86°F)		 34°C
(94°F)		 39°C
(102°F)		 42°C
(108°F)		 40°C
(104°F)		 42°C
(108°F)		 42°C
(108°F)		 38°C
(101°F)		 29°C
(85°F)		 24°C
(75°F)
Mean maximum 20°C
(68°F)		 23°C
(74°F)		 28°C
(82°F)		 32°C
(90°F)		 35°C
(96°F)		 39°C
(103°F)		 38°C
(101°F)		 39°C
(102°F)		 39°C
(102°F)		 33°C
(92°F)		 25°C
(77°F)		 20°C
(68°F)
Average high 15°C
(59°F)		 18°C
(64°F)		 19°C
(67°F)		 23°C
(75°F)		 27°C
(81°F)		 31°C
(88°F)		 32°C
(90°F)		 32°C
(89°F)		 31°C
(87°F)		 27°C
(80°F)		 19°C
(67°F)		 15°C
(59°F)
Daily mean 10°C
(50°F)		 12°C
(53°F)		 13°C
(56°F)		 17°C
(62°F)		 19°C
(67°F)		 23°C
(73°F)		 23°C
(74°F)		 23°C
(73°F)		 22°C
(72°F)		 19°C
(66°F)		 13°C
(56°F)		 10°C
(50°F)
Average low 6°C
(44°F)		 7°C
(45°F)		 8°C
(47°F)		 11°C
(51°F)		 13°C
(56°F)		 16°C
(60°F)		 16°C
(61°F)		 16°C
(62°F)		 15°C
(60°F)		 12°C
(54°F)		 8°C
(47°F)		 6°C
(43°F)
Mean minimum 1°C
(34°F)		 1°C
(35°F)		 3°C
(38°F)		 6°C
(43°F)		 9°C
(49°F)		 12°C
(55°F)		 13°C
(56°F)		 13°C
(56°F)		 11°C
(52°F)		 7°C
(44°F)		 3°C
(38°F)		 2°C
(35°F)
Minimum -1°C
(31°F)		 -2°C
(30°F)		 2°C
(36°F)		 4°C
(40°F)		 6°C
(43°F)		 11°C
(52°F)		 13°C
(55°F)		 12°C
(54°F)		 9°C
(49°F)		 6°C
(42°F)		 1°C
(35°F)		 1°C
(34°F)

Compare climate in Rio Vista with other places

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

Monthly average precipitation in Rio Vista, California, United States §

Rio Vista usually has the most precipitation in January, February and December, with an average of 7 rainy days and 102 mm (4.0 inches) of precipitation per month.The driest months in Rio Vista are July, August and September. On average, 0 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Rio Vista, 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) 116 (4.6) 99 (3.9) 76 (3.0) 33 (1.3) 16 (0.6) 2 (0.1) 0 (0.0) 0 (0.0) 1 (0.0) 31 (1.2) 40 (1.6) 90 (3.5)
Average precipitation days (≥ 1 mm) 8 7 9 4 2 0 0 0 0 2 5 8

Monthly sunshine hours in Rio Vista, California, United States §

The sunniest months in Rio Vista are May, June and July, when the sun shines an average of 12 hours 25 minutes a day.Least sunny months in Rio Vista: January, February and December receive an average of 6 hours 8 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Rio Vista, 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 149 214 261 299 364 383 394 357 314 284 223 195
Mean daily daylight hours 9h 50m 10h 47m 11h 59m 13h 13m 14h 15m 14h 45m 14h 28m 13h 33m 12h 22m 11h 9m 10h 4m 9h 32m

Solar UV radiation in Rio Vista, California, United States §

Rio Vista 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 Rio Vista UV Index data.

Average daily maximum UV levels by month for Rio Vista, 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