Alert archive / Illinois / Frost Advisories
Frost Advisories in Illinois, 2026
9 frost advisories in 2026. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of frost advisories reaches back to 2005.
Frost Advisories by county
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Frost Advisories
- 9
- Busiest month
- May5 frost advisories
- Busiest day
- April 18, 20262 frost advisories
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 1:29 PM CDT | Frost Advisory | LOT | Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 11 more | 20 hr |
| Apr 18, 1:48 PM CDT | Frost Advisory | ILX | Cass, Champaign, Christian, Clark, Clay, Coles and 29 more | 18 hr |
| Apr 19, 1:28 AM CDT | Frost Advisory | ILX | Cass, Christian, Clark, Clay, Coles, Crawford and 13 more | 31 hr |
| Apr 19, 2:40 PM CDT | Frost Advisory | LOT | Cook | 17 hr |
| May 1, 2:16 AM CDT | Frost Advisory | DVN | Bureau, Carroll, Henry, Jo Daviess, Mercer, Putnam and 3 more | 30 hr |
| May 1, 3:32 AM CDT | Frost Advisory | LOT | Boone, Cook, DeKalb, DuPage, Grundy, Iroquois and 10 more | 28 hr |
| May 6, 1:17 PM CDT | Frost Advisory | DVN | Bureau, Carroll, Henry, Jo Daviess, Putnam, Rock Island and 2 more | 19 hr |
| May 6, 1:23 PM CDT | Frost Advisory | LOT | Boone, Cook, DeKalb, DuPage, Grundy, Kane and 8 more | 19 hr |
| May 10, 11:57 AM CDT | Frost Advisory | DVN | Jo Daviess, Stephenson | 19 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Boone County3
- DeKalb County3
- DuPage County3
- Grundy County3
- Kane County3
- Kendall County3
- Lake County3
- LaSalle County3
- Lee County3
- McHenry County3
- Ogle County3
- Will County3
- Winnebago County3
- Cook County3
- Jo Daviess County3
- Stephenson County3
- Iroquois County2
- Kankakee County2
- Cass County2
- Christian County2
- Clark County2
- Clay County2
- Coles County2
- Crawford County2
- Cumberland County2
- Effingham County2
- Jasper County2
- Lawrence County2
- Macon County2
- Menard County2
- Morgan County2
- Moultrie County2
- Richland County2
- Sangamon County2
- Schuyler County2
- Scott County2
- Shelby County2
- Bureau County2
- Carroll County2
- Henry County2
22 more counties
- Putnam County2
- Rock Island County2
- Whiteside County2
- Ford County1
- Livingston County1
- Champaign County1
- DeWitt County1
- Douglas County1
- Edgar County1
- Fulton County1
- Knox County1
- Logan County1
- McLean County1
- Marshall County1
- Mason County1
- Peoria County1
- Piatt County1
- Stark County1
- Tazewell County1
- Vermilion County1
- Woodford County1
- Mercer County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Rebuilt daily.