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Monthly climate in Oceanside, California, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Oceanside features a hot-summer Mediterranean climate (Csa). Temperatures typically range between 14 °C (58 °F) and 22 °C (72 °F) through the year, but rarely can drop to 7 °C (44 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 296 mm (11.6 inches) and receives 36 rainy days on the 1 mm (0.04 inches) threshold annually. Oceanside enjoys an average of 3564 hours of sunshine throughout the year, and daylight varies from 9 hours 58 minutes to 14 hours 18 minutes per day.

Monthly average temperatures in Oceanside, California, United States §

The warmest months in Oceanside are July, August and September, with daily mean temperatures ranging from 21 to 22 °C (71 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 14 to 15 °C (58 - 59 °F) throughout the day. On average each year, Oceanside experiences 43 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 Oceanside, 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 27°C
(82°F)		 25°C
(78°F)		 24°C
(75°F)		 29°C
(85°F)		 26°C
(79°F)		 29°C
(85°F)		 35°C
(94°F)		 30°C
(86°F)		 34°C
(93°F)		 36°C
(97°F)		 29°C
(84°F)		 26°C
(78°F)
Mean maximum 24°C
(76°F)		 22°C
(72°F)		 23°C
(73°F)		 26°C
(79°F)		 25°C
(76°F)		 25°C
(78°F)		 29°C
(84°F)		 29°C
(84°F)		 30°C
(87°F)		 32°C
(89°F)		 28°C
(83°F)		 22°C
(73°F)
Average high 18°C
(64°F)		 17°C
(63°F)		 17°C
(64°F)		 19°C
(66°F)		 19°C
(66°F)		 21°C
(70°F)		 24°C
(75°F)		 25°C
(77°F)		 24°C
(76°F)		 24°C
(75°F)		 21°C
(70°F)		 18°C
(65°F)
Daily mean 14°C
(58°F)		 14°C
(58°F)		 15°C
(59°F)		 16°C
(61°F)		 17°C
(63°F)		 19°C
(66°F)		 21°C
(71°F)		 22°C
(72°F)		 22°C
(72°F)		 20°C
(69°F)		 18°C
(64°F)		 15°C
(59°F)
Average low 12°C
(54°F)		 11°C
(53°F)		 12°C
(54°F)		 14°C
(57°F)		 15°C
(59°F)		 17°C
(62°F)		 19°C
(67°F)		 20°C
(69°F)		 20°C
(68°F)		 18°C
(64°F)		 15°C
(59°F)		 12°C
(54°F)
Mean minimum 9°C
(48°F)		 8°C
(46°F)		 9°C
(49°F)		 11°C
(52°F)		 12°C
(54°F)		 15°C
(59°F)		 17°C
(63°F)		 18°C
(65°F)		 17°C
(63°F)		 14°C
(58°F)		 12°C
(53°F)		 9°C
(48°F)
Minimum 8°C
(47°F)		 7°C
(44°F)		 9°C
(48°F)		 10°C
(50°F)		 12°C
(53°F)		 14°C
(57°F)		 17°C
(62°F)		 17°C
(64°F)		 15°C
(60°F)		 11°C
(52°F)		 10°C
(49°F)		 7°C
(46°F)

Compare climate in Oceanside with other places

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

Monthly average precipitation in Oceanside, California, United States §

Oceanside usually has the most precipitation in January, February and December, with an average of 5 rainy days and 58 mm (2.3 inches) of precipitation per month. The driest months in Oceanside 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 Oceanside, 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) 54 (2.1) 56 (2.2) 45 (1.8) 23 (0.9) 14 (0.6) 3 (0.1) 3 (0.1) 1 (0.0) 3 (0.1) 10 (0.4) 21 (0.8) 63 (2.5)
Average precipitation days (≥ 1 mm) 5 6 9 3 4 0 0 0 1 1 2 5

Monthly sunshine hours in Oceanside, California, United States §

The sunniest months in Oceanside are June, July and August, when the sun shines an average of 11 hours 56 minutes a day. Least sunny months in Oceanside: January, February and December receive an average of 7 hours 9 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Oceanside, 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 189 237 291 317 347 362 376 359 313 292 253 224
Mean daily daylight hours 10h 13m 11h 0m 12h 0m 13h 1m 13h 52m 14h 18m 14h 4m 13h 18m 12h 19m 11h 18m 10h 25m 9h 58m

Solar UV radiation in Oceanside, California, United States §

Oceanside experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 11 - 12, 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 5. For more detailed information, check out our hourly Oceanside UV Index data.

Average daily maximum UV levels by month for Oceanside, 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) 4 6 8 10 11 12 11 10 10 7 5 4

Detailed Monthly Weather Insights for Oceanside, California, United States

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