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Monthly climate in Jamestown, California, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Jamestown features a hot-summer Mediterranean climate (Csa). Temperatures typically range between 8 °C (46 °F) and 26 °C (79 °F) through the year, but rarely can drop to -6 °C (22 °F) or can rise to as high as 40 °C (105 °F). The average annual precipitation amounts to about 981 mm (38.6 inches) and receives 60 rainy days on the 1 mm (0.04 inches) threshold annually. Jamestown enjoys an average of 3499 hours of sunshine throughout the year, and daylight varies from 9 hours 33 minutes to 14 hours 45 minutes per day.

Monthly average temperatures in Jamestown, California, United States §

The warmest months in Jamestown are June, July and August, with daily mean temperatures ranging from 22 to 26 °C (73 - 79 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 8 to 8 °C (46 - 47 °F) throughout the day. On average each year, Jamestown experiences 124 days above 25 °C (77.0 °F) and 14 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Jamestown, 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 22°C
(73°F)		 24°C
(75°F)		 27°C
(80°F)		 30°C
(87°F)		 35°C
(94°F)		 39°C
(103°F)		 39°C
(103°F)		 40°C
(105°F)		 40°C
(105°F)		 34°C
(93°F)		 27°C
(80°F)		 22°C
(72°F)
Mean maximum 19°C
(66°F)		 21°C
(70°F)		 24°C
(76°F)		 28°C
(82°F)		 32°C
(89°F)		 35°C
(96°F)		 38°C
(100°F)		 38°C
(101°F)		 37°C
(99°F)		 30°C
(87°F)		 24°C
(76°F)		 19°C
(67°F)
Average high 13°C
(56°F)		 15°C
(59°F)		 16°C
(61°F)		 20°C
(69°F)		 24°C
(75°F)		 30°C
(86°F)		 33°C
(92°F)		 33°C
(92°F)		 30°C
(86°F)		 24°C
(76°F)		 18°C
(65°F)		 13°C
(56°F)
Daily mean 8°C
(46°F)		 8°C
(47°F)		 10°C
(51°F)		 14°C
(57°F)		 17°C
(63°F)		 22°C
(73°F)		 26°C
(79°F)		 25°C
(78°F)		 22°C
(72°F)		 16°C
(62°F)		 11°C
(52°F)		 8°C
(46°F)
Average low 4°C
(39°F)		 3°C
(38°F)		 5°C
(41°F)		 7°C
(46°F)		 11°C
(51°F)		 15°C
(59°F)		 18°C
(64°F)		 17°C
(64°F)		 14°C
(58°F)		 9°C
(49°F)		 5°C
(42°F)		 3°C
(38°F)
Mean minimum -2°C
(28°F)		 -3°C
(26°F)		 -1°C
(31°F)		 1°C
(35°F)		 6°C
(42°F)		 9°C
(48°F)		 14°C
(58°F)		 13°C
(56°F)		 9°C
(48°F)		 4°C
(39°F)		 1°C
(34°F)		 -1°C
(30°F)
Minimum -6°C
(22°F)		 -6°C
(22°F)		 -2°C
(28°F)		 -1°C
(31°F)		 3°C
(37°F)		 8°C
(46°F)		 13°C
(55°F)		 12°C
(54°F)		 7°C
(45°F)		 2°C
(36°F)		 -1°C
(30°F)		 -2°C
(28°F)

Compare climate in Jamestown with other places

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

Monthly average precipitation in Jamestown, California, United States §

Jamestown usually has the most precipitation in January, February and March, with an average of 10 rainy days and 187 mm (7.4 inches) of precipitation per month. The driest months in Jamestown are June, July and August. On average, 1 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Jamestown, 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) 183 (7.2) 180 (7.1) 197 (7.7) 83 (3.3) 49 (1.9) 4 (0.1) 0 (0.0) 0 (0.0) 4 (0.2) 44 (1.7) 89 (3.5) 148 (5.8)
Average precipitation days (≥ 1 mm) 8 9 13 6 5 1 0 0 1 2 6 9

Monthly sunshine hours in Jamestown, California, United States §

The sunniest months in Jamestown are June, July and August, when the sun shines an average of 12 hours 29 minutes a day. Least sunny months in Jamestown: January, February and December receive an average of 6 hours 20 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Jamestown, 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 159 214 259 305 363 388 395 364 320 290 234 203
Mean daily daylight hours 9h 51m 10h 47m 11h 59m 13h 12m 14h 14m 14h 45m 14h 28m 13h 33m 12h 22m 11h 9m 10h 5m 9h 33m

Solar UV radiation in Jamestown, California, United States §

Jamestown 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 Jamestown UV Index data.

Average daily maximum UV levels by month for Jamestown, 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 11 11 10 9 7 4 3

Detailed Monthly Weather Insights for Jamestown, California, United States

Discover in-depth weather details for every month in Jamestown. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Jamestown's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.