Lemont, IL Live Doppler Radar
Live radar for Lemont, Cook County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.
What weather hits Lemont?
Since 1996, the National Weather Service has logged damaging thunderstorm winds on 260 days in the Southern Cook forecast zone and Cook County — the most common reported hazard around Lemont, mostly in July and June. Next come flooding (121 days) and flash flooding (112 days).
| Hazard | Days reported | Most recent | Worst on record |
|---|---|---|---|
| Damaging thunderstorm winds | 260 | Jun 2026 | Aug 23, 2007 · 1 death · $100,000 damage |
| Flooding | 121 | Jun 2026 | Sep 13, 2008 · 1 death |
| Flash flooding | 112 | Jun 2026 | Sep 13, 2008 · 1 death · $35 million damage |
| Lightning casualties & damage | 48 | Aug 2025 | Jul 22, 2001 · 1 death |
| Extreme cold & wind chill | 8 | Jan 2026 | — |
| Heavy snow & winter storms | 8 | Jan 2026 | Jan 12, 2024 · 1 death |
| Excessive heat | 7 | Jun 2026 | — |
| Dust storms | 1 | May 2025 | — |
Source: NOAA NCEI Storm Events Database, 1996–2026 (the latest year is partial). A "day" is a date with at least one report in the Southern Cook forecast zone and Cook County; damage is as reported, not adjusted for inflation.
How much snow does Lemont get?
A normal year brings about 33 inches of snow to Lemont, based on NOAA's 1991–2020 climate normals for the Romeoville Wfo weather station 6.8 miles away. The snowiest month is usually January (10.6 in).
| Oct | Nov | Dec | Jan | Feb | Mar | Apr | May |
|---|---|---|---|---|---|---|---|
| 0.1 | 1.2 | 7.5 | 10.6 | 8.7 | 4.2 | 0.9 | 0.0 |
Normal snowfall in inches. TALON Pro compares this season's snow at your location with these normals as winter goes on.
Which radars cover Lemont?
The closest NEXRAD Doppler radar is KLOT (Chicago, IL), about 7 miles southwest. Radar beams climb as they travel, so the height of the lowest scan over town decides how low in a storm the radar can see.
| Radar | Distance | Lowest beam over Lemont | View |
|---|---|---|---|
| KLOT Chicago, IL | 7 mi southwest | 300 ft | Excellent — the lowest scan sees close to the ground |
| KMKX Milwaukee/Sullivan, WI | 94 mi north-northwest | 8,800 ft | Fair — the beam can pass over shallow snow and low-level rotation |
| KIWX Fort Wayne, IN | 120 mi east | 12,700 ft | Limited — the beam overshoots the lowest part of storms |
Beam height is the center of the 0.5° scan above the radar, with standard refraction. Mountains near a radar can block it further.
Tornado & hail history near Lemont
Since 1950, NOAA has recorded 203 tornadoes within 25 miles of Lemont, 39 of them EF2/F2 or stronger. Most came in July and June. The strongest was an F5 on August 28, 1990, which passed about 12 miles southwest of town and caused 29 deaths. The most recent was an EF0 on March 19, 2025, which touched down about 13 miles south-southwest of town.
Hail: 672 reports of 1-inch or larger hail within 25 miles since 1955, 48 of them 2 inches or more; the largest was 4.75-inch hail on June 10, 2015.
Source: NOAA Storm Prediction Center — tornadoes 1950–2025, hail 1955–2025. Distances are to each tornado's track; ratings before February 2007 use the original Fujita scale.
On TALON you get Lemont's live radar loop, rain/snow/ice colors, flash-flood risk, storm tracks with arrival times and NWS warnings free; close-up radar and rotation detection are part of TALON Pro.
Lemont radar FAQ
Where is the nearest weather radar to Lemont, IL?
KLOT (Chicago, IL), about 7 miles southwest. KMKX (Milwaukee/Sullivan, WI) is 94 miles away and also covers the area.
Does radar show snow in Lemont?
Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over Lemont the lowest scan from KLOT is about 300 ft up.
Is TALON's radar for Lemont free?
Yes — the US radar loop, rain/snow/ice colors, flash-flood risk, storm tracks and NWS warnings are free in any browser. Close-up radar, rotation detection and longer forecasts are part of TALON Pro.
Should I rely on radar for my safety?
No app replaces official warnings. When the National Weather Service issues a warning for Lemont, follow it right away — see watch vs. warning.
Radar for nearby towns
- Homer Glen, IL radar 5 mi
- Darien, IL radar 5 mi
- Woodridge, IL radar 6 mi
- Lockport, IL radar 6 mi
- Bolingbrook, IL radar 6 mi
- Burr Ridge, IL radar 6 mi
- Romeoville, IL radar 7 mi
- Willow Springs, IL radar 7 mi
- Willowbrook, IL radar 7 mi
- Orland Park, IL radar 8 mi