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Contents
- The climate of Des Plaines
- The best time to visit Des Plaines
- The worst time to visit Des Plaines
- Spring weather in Des Plaines
- Summer weather in Des Plaines
- Autumn weather in Des Plaines
- Winter weather in Des Plaines
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Des Plaines
Des Plaines, Illinois finds itself in the humid continental climate zone, which under the Köppen climate classification is characterized by no dry season and hot summer. This extensive environment straddles the geographical position of Des Plaines, providing consistent characteristics to its climate throughout the year.
A close examination of the climatological parameters shows that Des Plaines experiences a broad range of temperatures across the 12 months. Observing the highest temperature in July of 80.6°F (27°C), to experiencing the lowest temperature in January, which delves down to 18.1°F (-7.7°C), the climate varies significantly. Peak humidity occurs at the beginning and end of the year, in January and December respectively which is around 82%, while the lowest hovers around 72% in October.
Rainfall is relatively spread out evenly over the year ranging from as low as 1.5" (38mm) in December, reaching a peak in May of 4.21" (107mm). Consecutively, days of rainfall vary from 5.3 days in February to a high of 18.5 days in May. Examining the snowfall distribution and frequency, December through February is the period to expect the highest accumulation while from June to September sees no snowfall at all.
A close examination of the climatological parameters shows that Des Plaines experiences a broad range of temperatures across the 12 months. Observing the highest temperature in July of 80.6°F (27°C), to experiencing the lowest temperature in January, which delves down to 18.1°F (-7.7°C), the climate varies significantly. Peak humidity occurs at the beginning and end of the year, in January and December respectively which is around 82%, while the lowest hovers around 72% in October.
Rainfall is relatively spread out evenly over the year ranging from as low as 1.5" (38mm) in December, reaching a peak in May of 4.21" (107mm). Consecutively, days of rainfall vary from 5.3 days in February to a high of 18.5 days in May. Examining the snowfall distribution and frequency, December through February is the period to expect the highest accumulation while from June to September sees no snowfall at all.
The best time to visit Des Plaines
The best time for a visit to Des Plaines varies according to individual preferences. For those seeking mild temperatures and less rainy days, the period from June to September is an ideal choice. During this time, temperatures are comfortably warm falling between 59.7°F (15.4°C) and 66.4°F (19.1°C) at their lowest and ranging from 72.5°F (22.5°C) to 80.6°F (27°C) at their highest. With relative rainfall ranging between 2.48" (63mm) to 4.02" (102mm), a scarcity of snowfall, and the longest daylight hours, it creates a perfect setting for outdoor activities.
The worst time to visit Des Plaines
The period spanning January to February is typically the least favorable for a visit to Des Plaines. During these months, temperatures plummet to a chilling 18.1°F (-7.7°C) and 20.7°F (-6.3°C) respectively. Furthermore, accumulated snowfall reaches 4.45" (113mm) in January and 4.84" (123mm) in February creating less than ideal conditions for travel and outdoor activities.
Spring weather in Des Plaines
Spring in Des Plaines is characterized by a medium range of temperatures, progressively shifting from cooler to warmer conditions. March marks the beginning of this shift with an average rainfall of 1.93" (49mm) which jumps to 3.62" (92mm) in April and peaks at 4.21" (107mm) in May. Concurrently, average temperatures elevate from 43.2°F (6.2°C) to 53.2°F (11.8°C) in April and then on to 64.6°F (18.1°C) in May.
Summer weather in Des Plaines
Des Plaines summer months, between June and August, serve up the year's highest temperatures with lows ranging from 59.7°F (15.4°C) to 66.9°F (19.4°C) and highs fluctuating from 72.5°F (22.5°C) to 80.6°F (27°C). With relatively moderate levels of rainfall from 2.48" (63mm) to 4.02" (102mm) and enjoyably long daylight hours, summer offers an excellent atmosphere for recreational outdoor activities.
Autumn weather in Des Plaines
Autumn’s arrival in Des Plaines signals a gradual reintroduction to colder conditions. As temperatures decline, ranges move from as high as 72.5°F (22.5°C) in September to 59.9°F (15.5°C) in October and then a low of 45.5°F (7.5°C) in November. Concurrently, rainfall also records a decline across these months meanwhile pressure levels witness a slight increase.
Winter weather in Des Plaines
Winter in Des Plaines can be quite difficult due to the combination of low temperatures, high snowfall, and short daylight hours. December through February marks the period with the lowest temperatures which fall between 18.1°F (-7.7°C) and 34.7°F (1.5°C). A heightened frequency of snowfall can be witnessed during these months. In addition, daylight hours are noticeably shorter and wind speeds increase, contributing to a chillier feel. It is this wintry backdrop that renders this period less preferable for visitors to Des Plaines.
Weather in January
The windy and chilly conditions of Des Plaines make January a predominantly winter month. The lowest temperatures of the year are recorded, falling to an average minimum of 18.1°F (-7.7°C). Despite these chilly conditions, clear skies are seldom seen, with cloud cover prevailing for 62% of the time. Weather in January »
Weather in February
February is marginally warmer than January in Des Plaines, although the winter conditions continue to persist. A slight increase in temperature is noted, reaching up to an average high of 31.8°F (-0.1°C). Still a winter month, it experiences snowfall and cloudy skies, but there's also a slight uptick in daylight hours. Weather in February »
Weather in March
March welcomes the arrival of spring in Des Plaines, although the remnants of winter can still be felt. The temperatures rise markedly, hitting an average high of 43.2°F (6.2°C), while the snowfall figure drops from February's 4.84" (123mm) to 1.34" (34mm). Weather in March »
Weather in April
April in Des Plaines is marked by a significant weather shift, as the spring season gains momentum. Temperatures continue to climb, making outdoor activities more viable and enjoyable. The city records the highest rainfall so far for the year, amounting to 3.62" (92mm) across 16.3 days, indicating a shift from snowy to rainy conditions. Weather in April »
Weather in May
May solidifies the presence of spring in Des Plaines with rising temperatures and longer daylight hours. Just a glimpse of the winter chill remains, and the city relishes the warmer weather. Greenery flourishes across the city due to the higher rainfall recorded in May, peaking at 4.21" (107mm). Weather in May »
Weather in June
June kicks off summer in the city of Des Plaines, with the temperatures hitting the year's highest. The thermometers read an average high of 74.5°F (23.6°C), and the city basks in generous sunshine for an extended 15.2 hours every day. Weather in June »
Weather in July
July in Des Plaines is the epitome of summer, boasting the hottest conditions of the year. It touches an average high of 80.6°F (27°C), inviting locals and tourists to experience and enjoy outdoor summer events. Although the skies are mostly clear, occasional rainfall adds to the charm without disrupting the overall dry and warm conditions. Weather in July »
Weather in August
August continues the summer season in Des Plaines and is almost idyllic with its warm and sunny weather. The high temperatures from July dip slightly, but it's hardly noticeable, presenting ideal conditions for outdoor activities. Weather in August »
Weather in September
September signals the onset of autumn in Des Plaines, mirroring a blend of summer's warmth and the chill of the upcoming winter. The noticeable dip in temperature from August's average high of 79.3°F (26.3°C) to September's 72.5°F (22.5°C) signifies the transition. Weather in September »
Weather in October
October further consolidates the presence of autumn in Des Plaines with a marked drop in temperatures. It's not as warm as September, and the city begins to experience cooler nights. The fall foliage displays gorgeous hues, providing a scenic backdrop to this weather change. Weather in October »
Weather in November
November showcases the late stages of fall, with gradually dipping temperatures in Des Plaines. Signs of winter start to become more apparent, and the first snowfall, measuring at an average of 1.38" (35mm), is a potential occurrence. Weather in November »
Weather in December
December announces the end of the year in Des Plaines, heralding the arrival of full-blown winter. The temperatures plunge swiftly, reaching down to the chilling average low of 25.7°F (-3.5°C). The winter cold engulfs the city, and a white Christmas seems highly likely, echoing the festive spirit. Weather in December »
Updated: Jun 3, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
January, recording an average high temperature of 28.8°F (-1.8°C) and a low temperature of 18.1°F (-7.7°C), is Des Plaines's coldest month.
What is the most humid month?
The months with the highest humidity are January and February, with an average relative humidity of 82%.
How much does it rain?
Throughout the year, there are 153.1 rainfall days, and 32.01" (813mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through May, October through December.
How much does it snow?
Throughout the year, there are 41.4 snowfall days, and 17.52" (445mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 3.7h of sunshine.
When does it snow the most?
February is the month with the most snowfall. Snow falls for 10.1 days and accumulates 4.84" (123mm) of snow.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Des Plaines, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
What is the rainiest month?
May is the month with the most rainfall. Rain falls for 18.5 days and accumulates 4.21" (107mm) of precipitation.
When it does not snow?
In Des Plaines, snow does not fall in June through September.
When are the longest days?
The month with the longest days is June, with an average of 15h and 12min of daylight.
What is the month with the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What is the warmest month?
Des Plaines's warmest temperatures are experienced in July, with average high temperatures of 80.6°F (27°C) and lows of 66.9°F (19.4°C).
What is the month with the most sunshine?
July and August, with an average of 10.3h of sunshine, are months with the most sunshine.
What is the least humid month?
With an average relative humidity of 72%, October is the least humid month.
What is the driest month?
The month with the least rainfall is December, when the rain falls for 8 days and typically collects 1.5" (38mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 12min of daylight.
When is the lowest UV index?
December is the month with the lowest UV index, with an average maximum UV index of 1.
Average temperature
Des Plaines, IL
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (28.8°F).
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure
Des Plaines, IL
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Des Plaines, IL
- Average wind speed in January:
10.8mph - Average wind speed in February:
10.5mph - Average wind speed in March:
9.9mph - Average wind speed in April:
10.1mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
7mph - Average wind speed in August:
6.8mph - Average wind speed in September:
8.1mph - Average wind speed in October:
9.7mph - Average wind speed in November:
10.4mph - Average wind speed in December:
10.1mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity
Des Plaines, IL
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Des Plaines, IL
- Average rainfall in January:
1.65" - Average rainfall in February:
1.73" - Average rainfall in March:
1.93" - Average rainfall in April:
3.62" - Average rainfall in May:
4.21" - Average rainfall in June:
4.02"
- Average rainfall in July:
3.46" - Average rainfall in August:
3.31" - Average rainfall in September:
2.48" - Average rainfall in October:
2.56" - Average rainfall in November:
1.54" - Average rainfall in December:
1.5"
The wettest month (with the highest rainfall) is May (4.21").
The driest month (with the least rainfall) is December (1.5").
Average rainfall days
Des Plaines, IL
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
16.3 days - Average rainfall days in May:
18.5 days - Average rainfall days in June:
17.4 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
15.9 days - Average rainfall days in September:
14 days - Average rainfall days in October:
12.7 days - Average rainfall days in November:
9.6 days - Average rainfall days in December:
8 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is February (5.3 days).
Average snowfall
Des Plaines, IL
- Average snowfall in January:
4.45" - Average snowfall in February:
4.84" - Average snowfall in March:
1.34" - Average snowfall in April:
2.48" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is February (4.84").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Des Plaines, IL
- Average snowfall days in January:
10.6 days - Average snowfall days in February:
10.1 days - Average snowfall days in March:
6.1 days - Average snowfall days in April:
2.3 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.4 days - Average snowfall days in November:
3.7 days - Average snowfall days in December:
8.1 days
The month with the highest number of snowfall days is January (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Des Plaines, IL
- Average daylight in January:
9h and 3min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 5min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 3min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 2min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Des Plaines, IL
- Average sunshine days in January:
15.2 days - Average sunshine days in February:
13.4 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
10.4 days - Average sunshine days in May:
10.5 days - Average sunshine days in June:
10.5 days
- Average sunshine days in July:
10.5 days - Average sunshine days in August:
12.8 days - Average sunshine days in September:
13.4 days - Average sunshine days in October:
15.5 days - Average sunshine days in November:
16.9 days - Average sunshine days in December:
16.9 days
The months with the most sunshine days are November and December (16.9 days).
The month with the least sunshine days is April (10.4 days).
Average UV index
Des Plaines, IL
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Des Plaines, IL
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility
Des Plaines, IL
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Des Plaines, Illinois, USA
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