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Monthly climate in Alameda, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Alameda features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 10 °C (51 °F) and 19 °C (66 °F) through the year, but rarely can drop to 0 °C (32 °F) or can rise to as high as 40 °C (104 °F).The average annual precipitation amounts to about 456 mm (18.0 inches) and receives 47 rainy days on the 1 mm (0.04 inches) threshold annually.Alameda enjoys an average of 3285 hours of sunshine throughout the year, and daylight varies from 9 hours 34 minutes to 14 hours 44 minutes per day.

Monthly average temperatures in Alameda, California, United States §

The warmest months in Alameda are June, August and September, with daily mean temperatures ranging from 18 to 19 °C (64 - 66 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 10 to 11 °C (51 - 53 °F) throughout the day. On average each year, Alameda experiences 49 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 Alameda, 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
(78°F)		 27°C
(81°F)		 31°C
(88°F)		 32°C
(90°F)		 37°C
(99°F)		 32°C
(90°F)		 37°C
(99°F)		 40°C
(104°F)		 34°C
(93°F)		 27°C
(81°F)		 23°C
(74°F)
Mean maximum 19°C
(67°F)		 22°C
(72°F)		 25°C
(77°F)		 28°C
(82°F)		 29°C
(84°F)		 32°C
(89°F)		 29°C
(85°F)		 32°C
(90°F)		 35°C
(96°F)		 31°C
(88°F)		 24°C
(75°F)		 19°C
(67°F)
Average high 14°C
(58°F)		 17°C
(62°F)		 17°C
(63°F)		 19°C
(67°F)		 21°C
(70°F)		 23°C
(74°F)		 23°C
(75°F)		 24°C
(76°F)		 25°C
(78°F)		 24°C
(75°F)		 18°C
(65°F)		 15°C
(58°F)
Daily mean 10°C
(51°F)		 11°C
(53°F)		 12°C
(54°F)		 14°C
(58°F)		 15°C
(60°F)		 18°C
(64°F)		 18°C
(64°F)		 18°C
(65°F)		 19°C
(66°F)		 17°C
(63°F)		 13°C
(56°F)		 10°C
(51°F)
Average low 7°C
(45°F)		 7°C
(45°F)		 8°C
(47°F)		 10°C
(50°F)		 11°C
(52°F)		 13°C
(56°F)		 13°C
(56°F)		 14°C
(58°F)		 14°C
(57°F)		 11°C
(53°F)		 9°C
(48°F)		 7°C
(44°F)
Mean minimum 2°C
(35°F)		 2°C
(36°F)		 4°C
(39°F)		 6°C
(42°F)		 8°C
(47°F)		 10°C
(51°F)		 12°C
(54°F)		 12°C
(53°F)		 10°C
(50°F)		 7°C
(44°F)		 4°C
(40°F)		 2°C
(37°F)
Minimum -0°C
(32°F)		 1°C
(34°F)		 3°C
(37°F)		 4°C
(40°F)		 6°C
(44°F)		 9°C
(49°F)		 11°C
(53°F)		 11°C
(52°F)		 8°C
(48°F)		 5°C
(41°F)		 3°C
(37°F)		 2°C
(35°F)

Compare climate in Alameda with other places

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

Monthly average precipitation in Alameda, California, United States §

Alameda usually has the most precipitation in January, February and December, with an average of 8 rainy days and 89 mm (3.5 inches) of precipitation per month.The driest months in Alameda are July, August and September. On average, 1 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Alameda, 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) 94 (3.7) 91 (3.6) 73 (2.9) 29 (1.2) 18 (0.7) 2 (0.1) 0 (0.0) 0 (0.0) 1 (0.0) 24 (1.0) 42 (1.7) 80 (3.2)
Average precipitation days (≥ 1 mm) 8 8 10 5 2 0 0 0 0 1 5 8

Monthly sunshine hours in Alameda, California, United States §

The sunniest months in Alameda are May, June and July, when the sun shines an average of 11 hours 22 minutes a day.Least sunny months in Alameda: January, February and December receive an average of 6 hours 10 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Alameda, 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 151 215 262 296 341 355 349 319 298 275 224 194
Mean daily daylight hours 9h 52m 10h 48m 11h 59m 13h 12m 14h 13m 14h 44m 14h 27m 13h 32m 12h 22m 11h 9m 10h 6m 9h 34m

Solar UV radiation in Alameda, California, United States §

Alameda 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 Alameda UV Index data.

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