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Monthly climate in Plymouth, California, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Plymouth features a hot-summer Mediterranean climate (Csa). Temperatures typically range between 8 °C (46 °F) and 25 °C (77 °F) through the year, but rarely can drop to -7 °C (20 °F) or can rise to as high as 40 °C (103 °F). The average annual precipitation amounts to about 1068 mm (42.1 inches) and receives 69 rainy days on the 1 mm (0.04 inches) threshold annually. Plymouth enjoys an average of 3470 hours of sunshine throughout the year, and daylight varies from 9 hours 31 minutes to 14 hours 47 minutes per day.

Monthly average temperatures in Plymouth, California, United States §

The warmest months in Plymouth are June, July and August, with daily mean temperatures ranging from 22 to 25 °C (72 - 77 °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 - 48 °F) throughout the day. On average each year, Plymouth experiences 117 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 Plymouth, 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 21°C
(71°F)		 23°C
(74°F)		 26°C
(78°F)		 29°C
(85°F)		 33°C
(92°F)		 39°C
(102°F)		 39°C
(102°F)		 40°C
(103°F)		 39°C
(103°F)		 34°C
(94°F)		 26°C
(78°F)		 21°C
(70°F)
Mean maximum 18°C
(65°F)		 21°C
(69°F)		 24°C
(75°F)		 27°C
(81°F)		 31°C
(88°F)		 35°C
(95°F)		 37°C
(99°F)		 37°C
(99°F)		 36°C
(98°F)		 30°C
(86°F)		 24°C
(75°F)		 19°C
(66°F)
Average high 13°C
(55°F)		 14°C
(58°F)		 16°C
(60°F)		 20°C
(68°F)		 23°C
(74°F)		 29°C
(84°F)		 32°C
(91°F)		 32°C
(90°F)		 29°C
(84°F)		 24°C
(75°F)		 17°C
(64°F)		 13°C
(55°F)
Daily mean 8°C
(47°F)		 8°C
(48°F)		 10°C
(50°F)		 13°C
(57°F)		 17°C
(62°F)		 22°C
(72°F)		 25°C
(77°F)		 24°C
(76°F)		 21°C
(71°F)		 16°C
(61°F)		 11°C
(52°F)		 8°C
(46°F)
Average low 4°C
(40°F)		 3°C
(39°F)		 5°C
(41°F)		 8°C
(46°F)		 10°C
(51°F)		 15°C
(59°F)		 17°C
(64°F)		 17°C
(63°F)		 14°C
(58°F)		 9°C
(49°F)		 6°C
(43°F)		 4°C
(39°F)
Mean minimum -2°C
(28°F)		 -3°C
(26°F)		 -1°C
(30°F)		 1°C
(35°F)		 5°C
(42°F)		 9°C
(48°F)		 13°C
(57°F)		 13°C
(55°F)		 9°C
(49°F)		 4°C
(39°F)		 1°C
(33°F)		 -1°C
(31°F)
Minimum -4°C
(25°F)		 -7°C
(20°F)		 -3°C
(27°F)		 -1°C
(31°F)		 1°C
(34°F)		 7°C
(45°F)		 12°C
(54°F)		 12°C
(53°F)		 7°C
(44°F)		 2°C
(36°F)		 -2°C
(29°F)		 -2°C
(29°F)

Compare climate in Plymouth with other places

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

Monthly average precipitation in Plymouth, California, United States §

Plymouth usually has the most precipitation in January, February and March, with an average of 11 rainy days and 197 mm (7.8 inches) of precipitation per month. The driest months in Plymouth 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 Plymouth, 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) 191 (7.5) 190 (7.5) 210 (8.3) 96 (3.8) 57 (2.2) 6 (0.2) 0 (0.0) 0 (0.0) 10 (0.4) 49 (1.9) 103 (4.1) 156 (6.1)
Average precipitation days (≥ 1 mm) 10 10 15 8 5 1 0 0 2 2 6 10

Monthly sunshine hours in Plymouth, California, United States §

The sunniest months in Plymouth are June, July and August, when the sun shines an average of 12 hours 27 minutes a day. Least sunny months in Plymouth: January, February and December receive an average of 6 hours 11 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Plymouth, 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 154 212 256 302 362 386 396 363 319 288 229 197
Mean daily daylight hours 9h 49m 10h 46m 11h 59m 13h 13m 14h 16m 14h 47m 14h 30m 13h 34m 12h 22m 11h 8m 10h 3m 9h 31m

Solar UV radiation in Plymouth, California, United States §

Plymouth 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, 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 Plymouth UV Index data.

Average daily maximum UV levels by month for Plymouth, 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 8 10 11 11 10 9 6 4 3

Detailed Monthly Weather Insights for Plymouth, California, United States

Discover in-depth weather details for every month in Plymouth. 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 Plymouth'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.