Living in the Chicago suburbs, you've probably realized that checking the forecast isn't just a habit—it's a survival skill. Honestly, New Lenox weather can be a total wildcard, and the new lenox weather 10 day outlook right now is proof of that. We’re currently sitting in that mid-January stretch where the sky stays a stubborn shade of gray, and the wind feels like it’s personally offended by your existence.
As of today, Sunday, January 18, 2026, the current temperature is a crisp 15°F, but it actually feels like 2°F thanks to a 12 mph southwest wind. If you're heading out to the Commons or just running to the store, that "feels like" number is the only one that actually matters.
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Breaking Down the New Lenox Weather 10 Day Forecast
Basically, we are looking at a classic Illinois winter rollercoaster. Today will stay cloudy with a high of 20°F, but keep an eye on the sky tonight. There's a 29% chance of snow showers after dark as the temperature dips down to a low of 3°F.
Tomorrow, Monday, January 19, things get even more intense. We're looking at a high of only 4°F. That is not a typo. With 19 mph west winds, the wind chill is going to be brutal. By Tuesday, it "warms up" to 30°F, which will probably feel like a tropical vacation compared to Monday's deep freeze, though it comes with a cloudy sky and a low of 2°F at night.
The Mid-Week Snow Threat
Wednesday, January 21, is the day to watch. We’re expecting light snow during the day and more consistent snow at night. The high will be 29°F, and the low will be 16°F. Precipitation chances are sitting around 35% for the evening, so the commute could get messy.
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By Thursday, January 22, the snow should taper off into a mostly cloudy day with a high of 22°F. It’s that typical New Lenox pattern: snow, followed by a sharp drop in temperature. Friday, January 23, will be partly sunny but freezing, with a high of only 10°F and a low of -2°F.
Heading Into Next Weekend
If you were hoping for a break next weekend, the new lenox weather 10 day data suggests you might want to keep the shovel handy. Saturday, January 24, brings a 20% to 35% chance of snow showers with a high of 13°F.
Sunday, January 25, and Monday, January 26, remain mostly cloudy and cold. Highs will hover between 10°F and 16°F. Finally, looking ahead to Tuesday, January 27, we’re still seeing mostly cloudy skies and a high of 13°F. It’s a relentless stretch of sub-freezing temperatures.
Why Local Forecasts Are Kinda Tricky
A lot of people think New Lenox is just "Chicago weather," but that's not exactly true. Because we're further south and inland, we sometimes miss the lake effect snow that hammers the city, but we also lose that slight "warmth" the lake provides in early winter.
Earlier this month, on January 14, we saw a massive snow squall with 40-60 mph winds that caught people off guard. That's the thing with New Lenox—it's not just the temperature; it's the sudden shifts in visibility and wind.
- Average January High: 32°F
- Average January Low: 16°F
- Current Forecast Trend: Well below average for the next week.
Actionable Steps for the Week Ahead
The biggest mistake people make in this weather is underestimating the Monday freeze. When the high is 4°F, your car battery is going to be under immense stress. If you haven't had it tested this season, do it today.
Also, with the snow expected on Wednesday night, make sure your salt bins are full before the evening rush. Driving on Route 30 or I-80 during a 35% snow chance can turn a 20-minute drive into an hour-long ordeal. Keep your tank at least half full to prevent fuel line freeze-up, and honestly, just stay inside Monday if you can.
Layering is the move for the rest of the week. Since we're oscillating between 30°F and 4°F, a heavy parka over a wool mid-layer is better than one giant coat. The wind is coming mostly from the northwest and west for the next ten days, so if your house faces that direction, check your window seals now to keep those heating bills from skyrocketing.