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Monthly climate in Los Alamos, California, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Los Alamos features a warm-summer Mediterranean climate (Csb). Temperatures typically range between 12 °C (53 °F) and 20 °C (68 °F) through the year, but rarely can drop to 1 °C (34 °F) or can rise to as high as 39 °C (102 °F). The average annual precipitation amounts to about 373 mm (14.7 inches) and receives 32 rainy days on the 1 mm (0.04 inches) threshold annually. Los Alamos enjoys an average of 3610 hours of sunshine throughout the year, and daylight varies from 9 hours 51 minutes to 14 hours 26 minutes per day.

Monthly average temperatures in Los Alamos, California, United States §

The warmest months in Los Alamos are July, August and September, with daily mean temperatures ranging from 19 to 20 °C (67 - 68 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 12 to 12 °C (53 - 54 °F) throughout the day. On average each year, Los Alamos experiences 58 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 Los Alamos, 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 28°C
(82°F)		 27°C
(81°F)		 26°C
(79°F)		 30°C
(87°F)		 28°C
(83°F)		 36°C
(97°F)		 36°C
(96°F)		 35°C
(95°F)		 39°C
(102°F)		 37°C
(98°F)		 29°C
(85°F)		 26°C
(78°F)
Mean maximum 24°C
(76°F)		 23°C
(73°F)		 24°C
(75°F)		 27°C
(81°F)		 26°C
(79°F)		 29°C
(85°F)		 31°C
(89°F)		 31°C
(87°F)		 33°C
(91°F)		 32°C
(91°F)		 29°C
(84°F)		 23°C
(73°F)
Average high 17°C
(63°F)		 17°C
(63°F)		 17°C
(63°F)		 19°C
(67°F)		 20°C
(69°F)		 23°C
(74°F)		 25°C
(77°F)		 25°C
(78°F)		 25°C
(77°F)		 24°C
(76°F)		 21°C
(70°F)		 17°C
(63°F)
Daily mean 12°C
(54°F)		 12°C
(53°F)		 12°C
(55°F)		 14°C
(58°F)		 15°C
(60°F)		 18°C
(65°F)		 20°C
(68°F)		 20°C
(68°F)		 19°C
(67°F)		 18°C
(64°F)		 15°C
(59°F)		 12°C
(54°F)
Average low 8°C
(46°F)		 7°C
(45°F)		 8°C
(47°F)		 10°C
(51°F)		 11°C
(53°F)		 14°C
(57°F)		 15°C
(60°F)		 16°C
(61°F)		 15°C
(59°F)		 13°C
(55°F)		 10°C
(50°F)		 8°C
(46°F)
Mean minimum 2°C
(37°F)		 2°C
(36°F)		 4°C
(39°F)		 6°C
(44°F)		 8°C
(47°F)		 10°C
(51°F)		 13°C
(56°F)		 13°C
(56°F)		 11°C
(52°F)		 8°C
(46°F)		 5°C
(42°F)		 3°C
(38°F)
Minimum 1°C
(34°F)		 1°C
(34°F)		 2°C
(36°F)		 5°C
(41°F)		 7°C
(44°F)		 9°C
(49°F)		 12°C
(54°F)		 13°C
(55°F)		 9°C
(49°F)		 6°C
(44°F)		 3°C
(38°F)		 3°C
(37°F)

Compare climate in Los Alamos with other places

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

Monthly average precipitation in Los Alamos, California, United States §

Los Alamos usually has the most precipitation in January, February and March, with an average of 6 rainy days and 80 mm (3.2 inches) of precipitation per month. The driest months in Los Alamos are June, July and August. On average, 0 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Los Alamos, 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) 87 (3.4) 73 (2.9) 81 (3.2) 21 (0.8) 10 (0.4) 0 (0.0) 1 (0.0) 0 (0.0) 1 (0.0) 8 (0.3) 26 (1.0) 65 (2.5)
Average precipitation days (≥ 1 mm) 6 6 8 2 2 0 0 0 0 0 3 5

Monthly sunshine hours in Los Alamos, California, United States §

The sunniest months in Los Alamos are May, June and July, when the sun shines an average of 12 hours 15 minutes a day. Least sunny months in Los Alamos: January, February and December receive an average of 7 hours 4 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Los Alamos, 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 182 233 288 322 370 373 383 360 318 297 250 228
Mean daily daylight hours 10h 6m 10h 56m 11h 59m 13h 4m 13h 59m 14h 26m 14h 11m 13h 22m 12h 20m 11h 15m 10h 19m 9h 51m

Solar UV radiation in Los Alamos, California, United States §

Los Alamos experiences the highest level of ultraviolet (UV) radiation in May, July and August, 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 Los Alamos UV Index data.

Average daily maximum UV levels by month for Los Alamos, 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 11 12 11 10 7 5 3

Detailed Monthly Weather Insights for Los Alamos, California, United States

Discover in-depth weather details for every month in Los Alamos. 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 Los Alamos'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.