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Monthly climate in Glendale Heights, Illinois, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Glendale Heights features a humid continental climate (Dfa).Temperatures typically range between -4 °C (26 °F) and 24 °C (75 °F) through the year, but rarely can drop to -33 °C (-27 °F) or can rise to as high as 35 °C (95 °F).The average annual precipitation amounts to about 1130 mm (44.5 inches) and receives 130 rainy days on the 1 mm (0.04 inches) threshold annually.Glendale Heights enjoys an average of 2949 hours of sunshine throughout the year, and daylight varies from 9 hours 8 minutes to 15 hours 11 minutes per day.

Monthly average temperatures in Glendale Heights, Illinois, United States §

The warmest months in Glendale Heights are June, July and August, with daily mean temperatures ranging from 21 to 24 °C (71 - 75 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -4 to 0 °C (26 - 33 °F) throughout the day. On average each year, Glendale Heights experiences 79 days above 25 °C (77.0 °F) and 106 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Glendale Heights, Illinois, 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 15°C
(59°F)		 21°C
(70°F)		 26°C
(79°F)		 29°C
(84°F)		 34°C
(93°F)		 34°C
(93°F)		 35°C
(95°F)		 34°C
(94°F)		 33°C
(93°F)		 31°C
(87°F)		 24°C
(76°F)		 19°C
(67°F)
Mean maximum 10°C
(51°F)		 14°C
(57°F)		 20°C
(69°F)		 26°C
(80°F)		 31°C
(87°F)		 33°C
(91°F)		 33°C
(92°F)		 33°C
(91°F)		 32°C
(90°F)		 29°C
(84°F)		 18°C
(64°F)		 16°C
(60°F)
Average high -0°C
(32°F)		 2°C
(35°F)		 8°C
(47°F)		 14°C
(57°F)		 20°C
(68°F)		 26°C
(79°F)		 28°C
(83°F)		 27°C
(81°F)		 25°C
(76°F)		 17°C
(63°F)		 8°C
(46°F)		 4°C
(40°F)
Daily mean -4°C
(26°F)		 -2°C
(28°F)		 4°C
(39°F)		 9°C
(48°F)		 15°C
(60°F)		 21°C
(71°F)		 24°C
(75°F)		 23°C
(73°F)		 20°C
(68°F)		 12°C
(54°F)		 4°C
(39°F)		 0°C
(33°F)
Average low -7°C
(19°F)		 -7°C
(20°F)		 -1°C
(31°F)		 4°C
(39°F)		 11°C
(51°F)		 17°C
(62°F)		 19°C
(67°F)		 18°C
(65°F)		 15°C
(59°F)		 8°C
(47°F)		 -0°C
(32°F)		 -3°C
(27°F)
Mean minimum -22°C
(-7°F)		 -22°C
(-7°F)		 -11°C
(12°F)		 -4°C
(26°F)		 3°C
(37°F)		 12°C
(54°F)		 15°C
(58°F)		 12°C
(54°F)		 8°C
(46°F)		 0°C
(32°F)		 -9°C
(15°F)		 -13°C
(9°F)
Minimum -31°C
(-23°F)		 -33°C
(-27°F)		 -20°C
(-3°F)		 -7°C
(19°F)		 -2°C
(29°F)		 9°C
(49°F)		 14°C
(57°F)		 10°C
(49°F)		 3°C
(38°F)		 -3°C
(26°F)		 -16°C
(4°F)		 -21°C
(-5°F)

Compare climate in Glendale Heights with other places

Compare temperature, precipitation, sunshine, UV index in Glendale Heights, Illinois, United States with other places around the world.

Monthly average precipitation in Glendale Heights, Illinois, United States §

Glendale Heights usually has the most precipitation in May, June and October, with an average of 13 rainy days and 142 mm (5.6 inches) of precipitation per month.The driest months in Glendale Heights are February, November and December. On average, 56 mm (2.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Glendale Heights, Illinois, 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) 60 (2.4) 79 (3.1) 115 (4.5) 164 (6.4) 134 (5.3) 105 (4.1) 92 (3.6) 85 (3.3) 127 (5.0) 55 (2.2) 53 (2.1)
Average precipitation days (≥ 1 mm) 8 11 10 13 14 13 13 11 9 13 8 7

Monthly sunshine hours in Glendale Heights, Illinois, United States §

The sunniest months in Glendale Heights are June, July and August, when the sun shines an average of 11 hours 10 minutes a day.Least sunny months in Glendale Heights: January, February and December receive an average of 5 hours 9 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Glendale Heights, Illinois, 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 117 178 233 248 283 328 360 338 279 216 189 174
Mean daily daylight hours 9h 29m 10h 35m 11h 58m 13h 23m 14h 35m 15h 11m 14h 51m 13h 47m 12h 25m 11h 0m 9h 46m 9h 8m

Solar UV radiation in Glendale Heights, Illinois, United States §

Glendale Heights experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure.January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Glendale Heights UV Index data.

Average daily maximum UV levels by month for Glendale Heights, Illinois, 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) 3 4 6 8 9 10 10 9 8 6 3 2