nomadseason

Monthly climate in Norwalk, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Norwalk features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 13 °C (56 °F) and 25 °C (76 °F) through the year, but rarely can drop to 2 °C (35 °F) or can rise to as high as 44 °C (112 °F).The average annual precipitation amounts to about 358 mm (14.1 inches) and receives 32 rainy days on the 1 mm (0.04 inches) threshold annually.Norwalk enjoys an average of 3567 hours of sunshine throughout the year, and daylight varies from 9 hours 54 minutes to 14 hours 22 minutes per day.

Monthly average temperatures in Norwalk, California, United States §

The warmest months in Norwalk are July, August and September, with daily mean temperatures ranging from 23 to 25 °C (74 - 76 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 13 to 13 °C (56 - 56 °F) throughout the day. On average each year, Norwalk experiences 144 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 Norwalk, 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 31°C
(88°F)		 30°C
(87°F)		 30°C
(86°F)		 36°C
(97°F)		 34°C
(93°F)		 37°C
(98°F)		 44°C
(112°F)		 39°C
(102°F)		 44°C
(112°F)		 39°C
(103°F)		 33°C
(93°F)		 27°C
(82°F)
Mean maximum 26°C
(79°F)		 26°C
(78°F)		 28°C
(83°F)		 33°C
(91°F)		 32°C
(89°F)		 33°C
(92°F)		 37°C
(99°F)		 36°C
(97°F)		 38°C
(100°F)		 36°C
(96°F)		 32°C
(90°F)		 25°C
(77°F)
Average high 19°C
(66°F)		 19°C
(67°F)		 20°C
(68°F)		 23°C
(74°F)		 24°C
(75°F)		 27°C
(81°F)		 30°C
(87°F)		 31°C
(88°F)		 30°C
(86°F)		 27°C
(81°F)		 23°C
(75°F)		 19°C
(66°F)
Daily mean 13°C
(56°F)		 13°C
(56°F)		 14°C
(58°F)		 17°C
(63°F)		 18°C
(65°F)		 21°C
(70°F)		 24°C
(76°F)		 25°C
(76°F)		 23°C
(74°F)		 20°C
(69°F)		 17°C
(62°F)		 13°C
(56°F)
Average low 8°C
(47°F)		 8°C
(47°F)		 10°C
(50°F)		 12°C
(54°F)		 14°C
(57°F)		 16°C
(61°F)		 19°C
(66°F)		 19°C
(67°F)		 18°C
(65°F)		 15°C
(59°F)		 12°C
(53°F)		 8°C
(47°F)
Mean minimum 4°C
(39°F)		 3°C
(37°F)		 5°C
(41°F)		 9°C
(48°F)		 10°C
(50°F)		 13°C
(56°F)		 16°C
(61°F)		 17°C
(62°F)		 14°C
(58°F)		 10°C
(50°F)		 7°C
(45°F)		 4°C
(39°F)
Minimum 2°C
(37°F)		 2°C
(35°F)		 3°C
(38°F)		 8°C
(47°F)		 8°C
(47°F)		 12°C
(54°F)		 15°C
(59°F)		 16°C
(61°F)		 12°C
(54°F)		 9°C
(48°F)		 5°C
(41°F)		 3°C
(37°F)

Compare climate in Norwalk with other places

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

Monthly average precipitation in Norwalk, California, United States §

Norwalk usually has the most precipitation in January, March and December, with an average of 5 rainy days and 71 mm (2.8 inches) of precipitation per month.The driest months in Norwalk are June, July and August. On average, 3 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Norwalk, 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) 75 (3.0) 63 (2.5) 67 (2.7) 23 (0.9) 16 (0.6) 3 (0.1) 2 (0.1) 2 (0.1) 4 (0.1) 10 (0.4) 20 (0.8) 72 (2.8)
Average precipitation days (≥ 1 mm) 5 6 8 3 3 0 0 0 0 1 2 4

Monthly sunshine hours in Norwalk, California, United States §

The sunniest months in Norwalk are June, July and August, when the sun shines an average of 12 hours 4 minutes a day.Least sunny months in Norwalk: January, February and December receive an average of 7 hours 3 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Norwalk, 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 186 231 280 316 351 369 380 361 316 293 255 224
Mean daily daylight hours 10h 9m 10h 57m 11h 59m 13h 3m 13h 56m 14h 22m 14h 8m 13h 21m 12h 20m 11h 16m 10h 21m 9h 54m

Solar UV radiation in Norwalk, California, United States §

Norwalk experiences the highest level of ultraviolet (UV) radiation in April, June and July, 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 5. For more detailed information, check out our hourly Norwalk UV Index data.

Average daily maximum UV levels by month for Norwalk, 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 10 11 11 10 10 7 5 4