The best times to visit Glendale Heights for ideal weather are

May 7th to June 24th


August 6th to October 7th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Glendale Heights Travel Info

Weather in Glendale Heights


Average temperatures in Glendale Heights vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 28th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Glendale Heights, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 86°F (30°C) with temperatures rarely dropping below 64.5°F (18.1°C) at night.

Glendale Heights Temperatures (Fahrenheit)


Glendale Heights Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Glendale Heights Perceived Temperature (F)


Glendale Heights Perceived Temperature (C)



Average Glendale Heights Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 30.9 22.2 14.1
Feb 31.7 23.3 15.3
Mar 48.9 38.1 29
Apr 61.5 49 38.4
May 73.8 61.1 49.4
Jun 81.8 70.1 59.2
Jul 84.8 73.6 62.7
Aug 83.3 72.1 61.5
Sep 76.8 64.7 53.6
Oct 64.2 52.8 42.7
Nov 49.9 39.9 31
Dec 36.9 29.1 21.5

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -0.6 -5.4 -9.9
Feb -0.2 -4.8 -9.3
Mar 9.4 3.4 -1.7
Apr 16.4 9.4 3.6
May 23.2 16.2 9.7
Jun 27.7 21.2 15.1
Jul 29.3 23.1 17.1
Aug 28.5 22.3 16.4
Sep 24.9 18.2 12
Oct 17.9 11.6 5.9
Nov 9.9 4.4 -0.6
Dec 2.7 -1.6 -5.8



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Glendale Heights are January, February, and then November. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late January and early February. For example, on the week of January 29th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late April with an average of 3 days of significant precipitation the week of April 23rd.

When can you find snow in Glendale Heights? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Glendale Heights.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Glendale Heights (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 10% 0 1.2
Feb 10% 0 1.2
Mar 16% 0 1.8
Apr 25% 0 3.6
May 25% 0 4
Jun 30% 0 4.4
Jul 22% 0 4.2
Aug 20% 0 4
Sep 18% 0 3.7
Oct 21% 0 2.5
Nov 15% 0 1.9
Dec 18% 0 2.3

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 10 0 3
Feb 10 0 3
Mar 16 0 4.6
Apr 25 0 9.1
May 25 0 10.2
Jun 30 0 11.2
Jul 22 0 10.7
Aug 20 0 10.2
Sep 18 0 9.4
Oct 21 0 6.4
Nov 15 0 4.8
Dec 18 0 5.8


Humidity and Wind

Glendale Heights has some high humidity months, with other comfortably humid months. The least humid month is April (52.1% relative humidity), and the most humid month is December (69.9%).

Wind in Glendale Heights is usually moderate. The windiest month is April, followed by January and February. April’s average wind speed of around 9.5 knots (10.9 MPH or 17.5 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid April where average top sustained speeds reach 17.5 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Glendale Heights.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 9 Gentle breeze 15.6 Significant breeze
Feb 8.9 Gentle breeze 15.4 Significant breeze
Mar 8.6 Gentle breeze 15.2 Significant breeze
Apr 9.5 Gentle breeze 17 Strong breeze
May 8 Gentle breeze 15.2 Significant breeze
Jun 6.9 Light breeze 14.6 Significant breeze
Jul 5.8 Light breeze 12.9 Significant breeze
Aug 5.2 Light breeze 12.3 Significant breeze
Sep 5.9 Light breeze 12.2 Significant breeze
Oct 7.3 Gentle breeze 13.9 Significant breeze
Nov 8.4 Gentle breeze 15 Significant breeze
Dec 8.4 Gentle breeze 14.7 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 65%
Feb 62.9%
Mar 57.2%
Apr 52.1%
May 53.9%
Jun 58.9%
Jul 59.4%
Aug 62.5%
Sep 61%
Oct 59.5%
Nov 60.9%
Dec 69.9%


Is it Safe to Travel to Glendale Heights?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Glendale Heights, IL, US is July, followed by June and August. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Glendale Heights in November. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is slightly extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 38.7 in November means 38.7% of the tourists vs. July.



Overall Glendale Heights Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 78.5°F (25.8°C) and 34.9°F (1.6°C) with far warmer temperatures in the later months. Rain is somewhat common with 5 to 8 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the most precipitation with 6 to 9 days of precipitation per month. June – August is the busiest season for tourism in Glendale Heights, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 80.4°F (26.9°C) and 42.4°F (5.8°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 5 to 7 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Glendale Heights to be enjoyable for warm weather travelers. The average high during this season is between 37.5°F (3.1°C) and 28.8°F (-1.8°C). On average, it rains or snows a fair amount: 3 to 6 times per month. These times of year are fairly slow with tourists.


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