Evergreen Park sits right on the edge of Chicago. If you live here, you already know the deal. One morning you’re scraping a thick sheet of ice off your windshield at 6:00 AM, and by the following Tuesday, you might be thinking about a light jacket for a walk through 50-Degree Mall. It’s wild.
Weather here isn't just a topic for small talk at the grocery store. It dictates everything from whether the kids can play at 50-Acre Park to if your basement is going to stay dry during a spring deluge. People call it "unpredictable," but honestly, there are some very specific rhythms to Evergreen Park Illinois weather that you can actually count on if you look at the data.
The Reality of Winter in the Village
January is the heavyweight champion of cold around here. You're looking at average highs of roughly 33°F, but that's a bit of a lie. The lows regularly dip to 20°F or lower. January 29th historically holds the title for the coldest day of the year.
Wind makes it worse. Since Evergreen Park is largely flat and residential, those 18 mph winds coming off the plains—or occasionally catching a bit of that "Lake Effect" chill—can make a 20-degree day feel like zero. It’s the kind of cold that hurts your face.
Snowfall is its own beast. January typically sees about 3 to 4 inches of the white stuff, but the village has seen some legendary clippers. Just last year, in late 2025, a series of "fluffy snow" events and arctic fronts kept the shovels busy almost weekly.
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- Coldest Month: January (Average low of 20°F)
- Windiest Month: January/April (Gusts often hit 25 mph)
- Snowfall Peak: January and February
But then there's February. It's shorter, but sometimes it feels longer because the "grey" sets in. The sky turns that specific shade of Illinois slate, and you might not see the sun for a week.
Spring: The Great Muddy Awakening
March is a trickster. You'll get a day that hits 50°F and everyone wears shorts. Then, a "wintry mix" hits on March 20th—just like it did in 2025—and you're back to boots and sleet.
April is actually the windiest month on average, with sustained speeds around 25 mph. It's also when the rain starts to get serious. Evergreen Park gets about 3.6 inches of rain in April, turning backyard gardens into miniature marshes.
May is technically the wettest month. We’re talking 4.5 inches of rain on average. If you've lived here long enough, you know to check your sump pump in late April. You don't want to find out it's broken during a midnight thunderstorm in May.
Those Famous "Muggy" Summers
July is the hottest month, hands down. The average high sits at 83°F or 85°F, but the humidity is what really gets you. It’s that thick, midwestern "soup" where you walk outside and immediately feel damp.
Relative humidity in the summer months stays around 70%. Combined with the "heat island" effect from being so close to Chicago's sprawl, the "feels like" temperature can easily skyrocket into the 90s.
Severe Weather Hazards
It’s not all sunshine and lemonade. Evergreen Park is in a region that gets its fair share of drama.
- Tornadoes: While the village itself hasn't been leveled, the sirens are real. In July 2025, severe storms with 70 mph wind gusts ripped through the area, prompting multiple warnings.
- Hail: Radar detects hail near Evergreen Park dozens of times a year. In the last 12 months, there were 40 severe weather warnings. That’s a lot of trips to the garage to save the car.
- Flash Floods: Because the ground is often saturated from May rains, a heavy July storm can cause instant street flooding.
Why September is Secretly the Best
Ask a local. Most will tell you September is the "sweet spot." The temperatures drop from the 80s down to a crisp 69°F by the end of the month. The humidity breaks. The bugs go away.
It's the best time for high school football or just sitting on the porch. October follows close behind with highs of 65°F and beautiful fall colors, though the wind starts to pick up again as we head toward the November "gloom."
What the Data Says About the Future
2024 was actually the second warmest year on record for the state. We’re seeing more "wild" swings. More rain in shorter bursts. Warmer winters followed by sudden, intense "arctic outbreaks."
For example, mid-January 2024 broke dozens of low-temperature records across Illinois, even though the overall year was hot. This "weather whiplash" is becoming the new normal for Evergreen Park residents.
Taking Action: How to Live with Evergreen Park Weather
Knowing the forecast is one thing; living with it is another. If you’re moving here or just trying to survive another season, here is the expert playbook.
Maintain Your Home’s Defenses
Since May is the wettest month, schedule your annual sump pump test in March. Clean your gutters after the "helicopter" seeds fall from the silver maples in June to prevent basement seepage during July thunderstorms.
Garden for the Climate
Don't plant your annuals before Mother’s Day. The "last frost" in Evergreen Park can be sneaky. Stick to native plants that can handle the 90-degree July heat and the 20-degree January freezes.
Energy Efficiency
With the wind speeds hitting 25 mph in April and January, check the seals on your windows. A drafty house in Evergreen Park will cost you a fortune in heating bills when that north wind comes howling across 95th Street.
Severe Weather Prep
Keep a "go-bag" or at least a dedicated space in your basement. When those sirens go off because a cell is moving 55 mph out of Willow Springs, you only have minutes. Make sure your phone is set to receive emergency alerts—they saved a lot of property damage during the 2025 wind events.
Winter Car Care
Keep your gas tank at least half full during January. If you get stuck in a "clipper" snowstorm on the Tri-State or Pulaski, you’ll need that fuel to keep the heater running. Also, swap out your wiper fluid for the -20°F de-icer version by November 1st. You'll thank yourself later.