Joliet, IL weather and climate in 2024
Day
2 °C
Night
-6 °C
Sea
5 °C
Precipitation
59 mm
in month
Rainy days
10 days
in month
Daylight
9 hours
average
Sunshine
3 hours
average
Humidity
77 %
Day
2 °C
Night
-6 °C
Sea
5 °C
Precipitation
59 mm
in month
Rainy days
10 days
in month
Daylight
9 hours
average
Sunshine
3 hours
average
Humidity
77 %
Overview: Joliet, IL
Weather charts for Joliet, IL
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Weather overview for Joliet, IL
Weather overview
Joliet, IL, nestled in the heart of the Midwest, experiences a continental climate characterized by a significant range between summer highs and winter lows. Winter months often bring chilly temperatures and snow, with January being the coldest. Summer is warm and can be humid, peaking in July. Transition months like April and October may offer a respite with mild warmth. Precipitation is fairly evenly distributed throughout the year, although summer tends to be slightly wetter. Whatever the season, Joliet's weather brings about different outdoor experiences for its residents.
January weather
January in Joliet brings frosty air with average daytime highs reaching just 0 °C (32 °F). Nighttime lows can be even more biting, dropping to -9 °C (16 °F) on average. There are about 10 of precipitation, setting a serene winter landscape. Despite the chill, winter sports enthusiasts find joy in the brisk weather.
February weather
February's chill in Joliet lingers with an average high of 3 °C (37 °F). The night sky often sees temperatures plunging to around -7 °C (20 °F). There's a broad skies theme, featuring 47 hours of sun, which gifts more daylight as winter slowly loosens its grip. Residents bundle up, yet feel the subtle shift towards spring.
March weather
March heralds the spring's tentative arrival in Joliet, with daytime temperatures climbing to an average high of 9 °C (48 °F). The nights remain brisk with an average low of -1 °C (29 °F). As the snow melts, 11 of rainfall denote the change in seasons, and the land starts to shake off its winter coat.
April weather
April in Joliet sees a more pronounced swing towards spring, with an average high temperature of 16 °C (61 °F). The nights are still cool, averaging 4 °C (39 °F), and the rains come down on approximately 12, nurturing the budding flora. Transitioning wardrobe choices mimic the season's unpredictability.
May weather
May flowers in Joliet are thanks to the preceding showers, with pleasant daytime highs averaging 22 °C (72 °F). Nighttime temperatures are comfy at an average of 10 °C (49 °F). The seasonal warmth means the city's parks are abloom, even though there might be rain on approximately 12.
June weather
June's welcome warmth in Joliet sees an average daytime high of 28 °C (82 °F), inviting residents to enjoy an array of summer activities. Night temperatures offer relief at an average of 15 °C (60 °F). There's an estimate of 11 of rain, which could include the occasional thunderstorm, bringing vitality to the Midwest summer.
July weather
July's peak summer heat in Joliet has residents experiencing average highs of 29 °C (85 °F), perfect for barbecues and pool days. Night temperatures are warm at 18 °C (64 °F). Despite the heat, an average of 10 of rain brings brief cooling, accompanied by an impressive 69 hours of sun to light up the long days.
August weather
August in Joliet remains toasty with average highs hovering at 29 °C (83 °F), while the nights begin to offer a hint of upcoming autumn coolness at 17 °C (62 °F). The statistical reality of 10 of rain indicates sporadic summer storms, refreshing the air but occasionally disrupting late-summer outings.
September weather
September in Joliet marks the onset of milder weather with average highs dialing back to 25 °C (77 °F). The nights become noticeably cooler, averaging 12 °C (54 °F). About 9 of rain intersperse the still-warm days, signaling the change is near, yet the month retains much of summer's joy.
October weather
October's gentle chill means Joliet sees a pleasant average high of 18 °C (64 °F) during the day and a snug average low of 6 °C (42 °F) at night. Approximately 9 of rain could bring occasional showers, with 57 hours of sunshine still gracing the month, perfect for catching the last warm rays before winter begins.
November weather
November witnesses a definitive turn towards colder weather in Joliet, with an average high of 10 °C (49 °F) and nights cooling down to an average of 0 °C (32 °F). There are around 10 of precipitation, often a mix of rain and early snow, while the shorter 40 hours of sunshine point to winter's approach.
December weather
As December ushers in the holiday season, Joliet wraps up in cold with daytime highs averaging a mere 2 °C (36 °F). Nightfall introduces even colder temperatures, averaging around -6 °C (21 °F). Snowfall becomes more regular, with precipitation on 10, completing the winter wonderland scene for festive celebrations.
FAQs
How cold can January nights get in Joliet?
January nights in Joliet can be quite cold, averaging lows of -9 °C (16 °F), so it's wise to have thick blankets and a warm heater at the ready.
Does February in Joliet offer more sunshine than January?
Absolutely, February offers a tad more sunshine, with around 47 hours, which is a pleasant increase from January's sunshine hours.
Can I expect the snow to have melted in Joliet by the end of March?
Typically, you can expect most of the snow to have melted by March's end, thanks to an increasing average high of 9 °C (48 °F) and regular precipitation.
How many hours of sunshine can I expect in Joliet during April?
The sun generously bestows Joliet with about 54 hours of sunshine in April, offering splendid opportunities for outdoor spring activities.
What is the average rainfall in Joliet throughout May?
On average, May sees rainfall amounting to 104 mm (4.08 in), sufficient to sustain the vibrant, new greenery.
What's the likelihood of rain affecting outdoor plans in Joliet during June?
While there are about 11 with rainfall, the likelihood of these affecting outdoor plans is balanced by the typically predictable patterns of Midwest thunderstorms, allowing for planning around them.
Is July often the hottest month in Joliet?
Yes, July is traditionally the hottest month in Joliet, with daytime temperatures soaring to an average high of 29 °C (85 °F).
Does August in Joliet still feel like summer, or does it start to cool off?
August definitely retains the summer vibe, with high temperatures averaging 29 °C (83 °F), though the cooling nights suggest the gradual transition towards fall.
What fall activities become popular in Joliet during September?
In September, Joliet's residents begin embracing fall activities like apple picking, attending football games, and enjoying nature's colorful transformation.
What can I anticipate in terms of October temperatures in Joliet?
October temperatures in Joliet are comfortably cool, ideal for sweater weather during the day, and you might need a heavier coat for evening outings.
With November in Joliet getting colder, how often does it rain?
Rain is quite common in November, falling on about 10, with the possibility of transitioning to snow as temperatures drop.
What are the typical day and night temperatures in Joliet during December?
December days in Joliet are cold, with average highs of 2 °C (36 °F), while nights drop to an average of -6 °C (21 °F), calling for warm indoor atmospheres and cozy clothing.
We make the most from 40 years of historical weather data to predict the best weather conditions.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.