Climate and monthly weather forecastOak Park, IL
Climate and monthly weather forecast
The climate of Oak Park
Oak Park, a suburban community in Cook County, Illinois, USA, experiences a Dfa Köppen climate classification, commonly known as a humid continental climate with hot summer months and no dry season. Geographically positioned at a latitude of 41.8850°N, its weather is characterized by the interaction between polar and tropical air masses, leading to contrasting conditions throughout the year.Temperature fluctuations are significant in Oak Park. High temperatures range from 28.9°F (-1.7°C) in January to 79.7°F (26.5°C) in July, while low temperatures shift from 19.4°F (-7°C) in January to 67.5°F (19.7°C) in July. Humidity is relatively constant year-round, with slight variations from the lowest level of 72% in October to the highest level of 82% in January.
Precipitation in Oak Park is well distributed throughout the year, with rainfall inch values ranging from a low of 1.57in in December to a high of 4.49in in May. The number of rainy days, however, peaks sharply in May, with 18.8 rainy days, compared to the minimum of 5.1 days in February. Notably, snow covers Oak Park from October to April, reaching a maximum inch value of 4.69in in February.
In terms of sunlight, Oak Park benefits from daylight hours that span from 9.5h in January to a maximum of 15.2h in June. Sunshine hours follow a similar pattern, with a low of 3.7h in January to a high of 10.6h in August. The UV Index fluctuates throughout the year, reaching its peak in the summer months of June, July, and August with a rating of 6, and dropping to 1 in January and December.
The best time to visit Oak Park
The best time to visit Oak Park largely depends on personal preferences, but generally, late spring and early fall provide optimal conditions. May and June offer a balance of pleasant temperatures, moderate humidity, and abundant sunlight. During these months, the average temperature ranges from 53.2°F (11.8°C) to 73.9°F (23.3°C), humidity hovers around 77% and sunshine extends to 9.9h per day on average. The UV Index in these months is 5 and 6 respectively, making it suitable for all activities, with the caveat of good sun protection during peak hours.The worst time to visit Oak Park
Visiting Oak Park in winter is less advisable due to considerably lower temperatures and shorter daylight hours. Between December and February, high temperatures barely rise above freezing, with lows dipping to 19.4°F (-7°C) in January. Daylight hours in January are the shortest in the year, with only 9.5h. These conditions are further compounded by significant snowfall - February sees an average of 4.69in of snow, making outdoor activities challenging.Spring weather in Oak Park
Spring in Oak Park is characterized by gradually warming temperatures and increasing precipitation. From March to May, high temperatures climb from 43.2°F (6.2°C) to 64.4°F (18°C), while low temperatures rise from 32.2°F (0.1°C) to 51.4°F (10.8°C). Rainfall escalates notably during this season, culminating with the year's highest rainfall measurement of 4.49in in May.Summer weather in Oak Park
Summer in Oak Park, spanning June through August, sees the highest temperatures, with highs ranging from 73.9°F (23.3°C) in June to 79.7°F (26.5°C) in July. Nights are also warm with the lowest temperatures staying above 61.2°F (16.2°C). Despite being the sunniest period with over 10h of sunlight per day, it sees modest rainfall, with rainfall inches fluctuating between 3.74in and 4.29in and a corresponding slight increase in the relative humidity.Autumn weather in Oak Park
Autumn in Oak Park brings lower temperatures, shorter days, and less rainfall. From September to November, high temperatures fall from 72.1°F (22.3°C) to 45.9°F (7.7°C), while low temperatures drop from 60.4°F (15.8°C) to 35.4°F (1.9°C). Rainfall inches recede as well, from 2.72in in September to 1.65in in November. Sunshine duration reduces to 5.1h by November.Winter weather in Oak Park
Winter in Oak Park is defined by cold temperatures, snowfall, and limited sunshine. Between December and February, high temperatures range from 35.1°F (1.7°C) to 28.9°F (-1.7°C) and low temperatures fluctuate between 26.6°F (-3°C) and 19.4°F (-7°C). Snowfall is prevalent during this time, peaking at 4.69in in February, while sunshine hours drop to their lowest point of 3.7h in January.Weather in January
January is the coldest month in Oak Park, Illinois, with average high and low temperatures hanging between 19.4°F (-7°C) and 28.9°F (-1.7°C). With the biting chill, one can also expect occasional precipitation, mostly manifesting as snowfall. Weather in January »Weather in February
Oak Park begins to experience slight warming in February, a subtle reprieve from January's frosty days. The rise in temperature mildly alleviates the cold, yet parka-clad pedestrians are still a common sight. Snowfall continues, although less frequently than the preceding month, and road conditions may often prove challenging due to occasional snowstorms. Weather in February »Weather in March
March ushers in noticeable weather changes in Oak Park as winter transitions into spring. With ice beginning to thaw, the emergence of a warmer climate comes as a welcome break from winter's freezing temperatures. Rainfall takes over from snowfall, signaling a shift in the precipitation pattern. Weather in March »Weather in April
April is known for the substantial amount of rain in Oak Park, with monthly precipitation reaching its highest point at 3.62" (92mm). As it restores the verdant, blossoming landscape, rain brings the distinct refreshment characteristic of spring to the city. Weather in April »Weather in May
By May, Oak Park sheds the last vestiges of winter, and temperatures begin to reflect the arrival of summer. Parks and recreational areas teem with life as the weather permits more outdoor activities. Fine days are dominant, with the radiant sun illuminating the city for a generous amount of time. Weather in May »Weather in June
June is a delightful period in Oak Park, marking the onset of summer in all its glory. It is accompanied by ascending temperatures and an extended duration of daylight. Sunbathing enthusiasts enjoy long, sunny days perfect for outdoor activities. Weather in June »Weather in July
July witnesses the peak of summer heat in Oak Park, with the highest average temperature registering at 79.7°F (26.5°C). The hot summer in Illinois is often balmy and bright, punctuated only by occasional thunderstorms. The city hums with lively summer activities and the atmosphere pulsates with high energy. Weather in July »Weather in August
August in Oak Park continues the summer trend, only marginally cooler than July. The sweltering heat continues unabated with evenings offering a gentle relief from the day's temperature. Despite sporadic rains, the city savors abundant sunshine. Weather in August »Weather in September
September in Oak Park brings a cooling trend as summer surrenders to autumn. Changes in the landscape become visible as trees begin to shed leaves in hues of red, orange, and yellow. While occasional drizzles may occur, the majority of the month is marked by pleasant, mild weather. Weather in September »Weather in October
October is fully cloaked in autumn colors in Oak Park, painting a beautiful canvas with its falling leaves. The cool October breezes bring relief from the residual summer heat. Overcast skies and misty mornings are common, adding to the mystical ambiance that autumn injects into the cityscape. Weather in October »Weather in November
As November rolls in, Oak Park prepares for the onset of winter. Temperatures see a significant decline from the previous month, making warm attire a norm again. Despite the chilly weather, the sun shines for a good duration of the day, but daylight hours gradually decrease. Weather in November »Weather in December
December in Oak Park, Illinois, experiences the return of winter in full swing, featuring increased snowfall of up to 2.52" (64mm). The city is covered in a pristine layer of snow, making for picturesque winterscapes. Daylight hours are the shortest of the year, causing early evenings and long nights. Weather in December »Updated: Feb 12, 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
Oak Park's January weather reaches an average high of 28.9°F (-1.7°C) and an average low of 19.4°F (-7°C), making it the coldest month.
With an average relative humidity of 82%, January is the most humid month.
Throughout the year, in Oak Park, there are 157.8 rainfall days, and 33.7" (856mm) of precipitation is accumulated.
January through May, October through December are months with snowfall.
Throughout the year, there are 40.3 snowfall days, and 16.81" (427mm) of snow is accumulated.
January has the least sunshine of the year in Oak Park, Illinois, with an average of 3.7h of sunshine.
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Oak Park.
The month with the most snowfall in Oak Park is February, when snow falls for 10.2 days and typically aggregates up to 4.69" (119mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Oak Park, Illinois, 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.
May is the month with the most rainfall in Oak Park. Rain falls for 18.8 days and accumulates 4.49" (114mm) of precipitation.
June through September are months without snowfall.
The month with the longest days in Oak Park is June, with an average of 15h and 12min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index.
July, with its average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 67.5°F (19.7°C), holds the record as the warmest month in Oak Park, Illinois.
With an average of 10.6h of sunshine, August has the most sunshine of the year in Oak Park, Illinois.
With an average relative humidity of 72%, October is the least humid month.
December is the month with the least rainfall in Oak Park, Illinois. Rain falls for 8.2 days and accumulates 1.57" (40mm) of precipitation.
December has the shortest days of the year, with an average of 9h and 12min of daylight.
Average temperature
Oak Park, IL
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.9°F).
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure
Oak Park, IL
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.1"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:
30.01"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
Oak Park, IL
- Average wind speed in January:
11.1mph - Average wind speed in February:
10.7mph - Average wind speed in March:
10.1mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.7mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
7mph - Average wind speed in August:
7mph - Average wind speed in September:
8.3mph - Average wind speed in October:
10.1mph - Average wind speed in November:
10.7mph - Average wind speed in December:
10.4mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity
Oak Park, IL
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Oak Park, IL
- Average rainfall in January:
1.69" - Average rainfall in February:
1.73" - Average rainfall in March:
2.01" - Average rainfall in April:
3.62" - Average rainfall in May:
4.49" - Average rainfall in June:
4.29"
- Average rainfall in July:
3.74" - Average rainfall in August:
3.5" - Average rainfall in September:
2.72" - Average rainfall in October:
2.68" - Average rainfall in November:
1.65" - Average rainfall in December:
1.57"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is December (1.57").
Average rainfall days
Oak Park, IL
- Average rainfall days in January:
6.5 days - Average rainfall days in February:
5.1 days - Average rainfall days in March:
11.9 days - Average rainfall days in April:
16.8 days - Average rainfall days in May:
18.8 days - Average rainfall days in June:
17.8 days
- Average rainfall days in July:
18.5 days - Average rainfall days in August:
16.4 days - Average rainfall days in September:
14.5 days - Average rainfall days in October:
13.6 days - Average rainfall days in November:
9.7 days - Average rainfall days in December:
8.2 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (5.1 days).
Average snowfall
Oak Park, IL
- Average snowfall in January:
4.21" - Average snowfall in February:
4.69" - Average snowfall in March:
1.26" - Average snowfall in April:
1.97" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is February (4.69").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Oak Park, IL
- Average snowfall days in January:
10.8 days - Average snowfall days in February:
10.2 days - Average snowfall days in March:
5.8 days - Average snowfall days in April:
1.8 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:
0.2 days - Average snowfall days in November:
3.1 days - Average snowfall days in December:
8.3 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Oak Park, IL
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 12min
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 42min - Average sunshine in February:
3h and 54min - Average sunshine in March:
6h and 6min - Average sunshine in April:
7h and 48min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 54min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
10h and 36min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 48min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Oak Park, IL
- Average sunshine days in January:
14.3 days - Average sunshine days in February:
12.9 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
10.2 days - Average sunshine days in May:
10.4 days - Average sunshine days in June:
10.3 days
- Average sunshine days in July:
9.9 days - Average sunshine days in August:
11.8 days - Average sunshine days in September:
13.4 days - Average sunshine days in October:
15.1 days - Average sunshine days in November:
16.3 days - Average sunshine days in December:
16.7 days
The month with the most sunshine days is December (16.7 days).
The month with the least sunshine days is July (9.9 days).
Average UV index
Oak Park, IL
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Oak Park, IL
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility
Oak Park, 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).
