nomadseason

Monthly climate in Signal Hill, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Signal Hill features a cold semi-arid climate (BSk).Temperatures typically range between 14 °C (58 °F) and 22 °C (72 °F) through the year, but rarely can drop to 6 °C (43 °F) or can rise to as high as 37 °C (98 °F).The average annual precipitation amounts to about 294 mm (11.6 inches) and receives 30 rainy days on the 1 mm (0.04 inches) threshold annually.Signal Hill enjoys an average of 3571 hours of sunshine throughout the year, and daylight varies from 9 hours 55 minutes to 14 hours 21 minutes per day.

Monthly average temperatures in Signal Hill, California, United States §

The warmest months in Signal Hill 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 December, when daily mean temperatures range from 14 to 14 °C (58 - 58 °F) throughout the day. On average each year, Signal Hill experiences 63 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 Signal Hill, 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)		 28°C
(83°F)		 25°C
(77°F)		 32°C
(89°F)		 28°C
(82°F)		 30°C
(87°F)		 36°C
(97°F)		 31°C
(89°F)		 36°C
(97°F)		 37°C
(98°F)		 31°C
(88°F)		 26°C
(79°F)
Mean maximum 24°C
(76°F)		 23°C
(74°F)		 24°C
(75°F)		 28°C
(82°F)		 26°C
(79°F)		 27°C
(81°F)		 30°C
(87°F)		 29°C
(85°F)		 31°C
(89°F)		 32°C
(90°F)		 29°C
(84°F)		 23°C
(73°F)
Average high 18°C
(65°F)		 18°C
(64°F)		 18°C
(65°F)		 20°C
(68°F)		 20°C
(69°F)		 22°C
(72°F)		 25°C
(77°F)		 26°C
(79°F)		 25°C
(78°F)		 24°C
(76°F)		 21°C
(71°F)		 18°C
(65°F)
Daily mean 14°C
(58°F)		 14°C
(58°F)		 15°C
(59°F)		 17°C
(62°F)		 17°C
(63°F)		 19°C
(66°F)		 21°C
(71°F)		 22°C
(72°F)		 22°C
(71°F)		 20°C
(69°F)		 17°C
(63°F)		 14°C
(58°F)
Average low 11°C
(52°F)		 11°C
(52°F)		 12°C
(54°F)		 14°C
(57°F)		 15°C
(59°F)		 16°C
(62°F)		 19°C
(66°F)		 19°C
(67°F)		 19°C
(66°F)		 17°C
(62°F)		 14°C
(57°F)		 11°C
(52°F)
Mean minimum 7°C
(45°F)		 7°C
(44°F)		 9°C
(48°F)		 11°C
(53°F)		 13°C
(55°F)		 15°C
(59°F)		 17°C
(62°F)		 17°C
(63°F)		 16°C
(61°F)		 13°C
(56°F)		 10°C
(51°F)		 7°C
(45°F)
Minimum 6°C
(43°F)		 6°C
(43°F)		 8°C
(47°F)		 11°C
(52°F)		 11°C
(53°F)		 14°C
(58°F)		 16°C
(61°F)		 16°C
(61°F)		 15°C
(60°F)		 12°C
(54°F)		 9°C
(48°F)		 7°C
(44°F)

Compare climate in Signal Hill with other places

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

Monthly average precipitation in Signal Hill, California, United States §

Signal Hill usually has the most precipitation in January, March and December, with an average of 5 rainy days and 61 mm (2.4 inches) of precipitation per month.The driest months in Signal Hill are June, August and September. On average, 2 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Signal Hill, 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) 61 (2.4) 48 (1.9) 52 (2.1) 18 (0.7) 10 (0.4) 3 (0.1) 3 (0.1) 1 (0.1) 3 (0.1) 8 (0.3) 17 (0.7) 70 (2.8)
Average precipitation days (≥ 1 mm) 5 5 8 2 2 0 0 0 0 2 2 4

Monthly sunshine hours in Signal Hill, California, United States §

The sunniest months in Signal Hill are June, July and August, when the sun shines an average of 11 hours 57 minutes a day.Least sunny months in Signal Hill: 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 Signal Hill, 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 191 233 290 318 346 362 378 359 315 292 256 227
Mean daily daylight hours 10h 10m 10h 58m 11h 59m 13h 2m 13h 55m 14h 21m 14h 7m 13h 20m 12h 19m 11h 17m 10h 22m 9h 55m

Solar UV radiation in Signal Hill, California, United States §

Signal Hill experiences the highest level of ultraviolet (UV) radiation in June, July and September, 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 Signal Hill UV Index data.

Average daily maximum UV levels by month for Signal Hill, 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 9 10 11 11 10 10 7 5 4