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Monthly climate in Glendora, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Glendora features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 10 °C (50 °F) and 25 °C (77 °F) through the year, but rarely can drop to -3 °C (27 °F) or can rise to as high as 42 °C (108 °F).The average annual precipitation amounts to about 413 mm (16.2 inches) and receives 42 rainy days on the 1 mm (0.04 inches) threshold annually.Glendora enjoys an average of 3598 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 Glendora, California, United States §

The warmest months in Glendora are July, August and September, with daily mean temperatures ranging from 23 to 25 °C (73 - 77 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 10 to 10 °C (50 - 50 °F) throughout the day. On average each year, Glendora experiences 127 days above 25 °C (77.0 °F) and 3 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Glendora, 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 26°C
(80°F)		 25°C
(78°F)		 27°C
(81°F)		 32°C
(89°F)		 32°C
(90°F)		 37°C
(99°F)		 40°C
(105°F)		 38°C
(101°F)		 42°C
(108°F)		 36°C
(96°F)		 29°C
(85°F)		 25°C
(77°F)
Mean maximum 22°C
(71°F)		 22°C
(72°F)		 25°C
(77°F)		 29°C
(85°F)		 30°C
(86°F)		 33°C
(92°F)		 36°C
(98°F)		 36°C
(97°F)		 37°C
(98°F)		 32°C
(89°F)		 28°C
(83°F)		 23°C
(73°F)
Average high 15°C
(60°F)		 16°C
(60°F)		 17°C
(63°F)		 21°C
(70°F)		 23°C
(73°F)		 28°C
(83°F)		 32°C
(89°F)		 32°C
(89°F)		 29°C
(85°F)		 25°C
(77°F)		 21°C
(69°F)		 15°C
(60°F)
Daily mean 10°C
(50°F)		 10°C
(50°F)		 11°C
(53°F)		 15°C
(59°F)		 17°C
(62°F)		 21°C
(71°F)		 25°C
(77°F)		 25°C
(77°F)		 23°C
(73°F)		 18°C
(65°F)		 14°C
(58°F)		 10°C
(50°F)
Average low 6°C
(43°F)		 6°C
(42°F)		 7°C
(44°F)		 10°C
(50°F)		 11°C
(53°F)		 15°C
(60°F)		 19°C
(66°F)		 19°C
(67°F)		 17°C
(63°F)		 13°C
(55°F)		 10°C
(49°F)		 6°C
(43°F)
Mean minimum 0°C
(33°F)		 -0°C
(31°F)		 1°C
(34°F)		 5°C
(41°F)		 6°C
(42°F)		 10°C
(51°F)		 15°C
(59°F)		 15°C
(59°F)		 12°C
(53°F)		 8°C
(46°F)		 4°C
(40°F)		 1°C
(34°F)
Minimum -3°C
(27°F)		 -3°C
(27°F)		 -1°C
(30°F)		 4°C
(39°F)		 3°C
(38°F)		 9°C
(48°F)		 12°C
(55°F)		 14°C
(57°F)		 9°C
(48°F)		 5°C
(42°F)		 1°C
(33°F)		 0°C
(33°F)

Compare climate in Glendora with other places

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

Monthly average precipitation in Glendora, California, United States §

Glendora usually has the most precipitation in January, March and December, with an average of 6 rainy days and 78 mm (3.1 inches) of precipitation per month.The driest months in Glendora are June, July and September. On average, 5 mm (0.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Glendora, 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) 77 (3.0) 73 (2.9) 79 (3.1) 25 (1.0) 20 (0.8) 3 (0.1) 6 (0.2) 9 (0.4) 6 (0.2) 11 (0.4) 25 (1.0) 79 (3.1)
Average precipitation days (≥ 1 mm) 5 6 10 2 4 1 2 2 1 2 2 5

Monthly sunshine hours in Glendora, California, United States §

The sunniest months in Glendora are June, July and August, when the sun shines an average of 12 hours 11 minutes a day.Least sunny months in Glendora: January, February and December receive an average of 7 hours 2 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Glendora, 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 185 233 280 323 360 377 382 362 319 296 255 222
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 Glendora, California, United States §

Glendora experiences the highest level of ultraviolet (UV) radiation in June, 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 Glendora UV Index data.

Average daily maximum UV levels by month for Glendora, 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 9 10 11 12 12 11 10 7 5 4