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Red Flag Warning RED FLAG WARNING - Cook County  - DuPage County

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METRIC | IMPERIAL
Updated: 18-Feb-2026 @ 3:00pm  
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 0.3°F than last hour.

63.3°F

---
High Today
64.1°F
1:37 PM
Low Today
51.4°F
12:00 AM
Yest High
57.7°F
2:14 PM
Yest Low
37.7°F
3:10 AM
Sta* High
---°F
2026
Sta* Low
---°F
2026
* This Station's Records Since 12/2012
Rec* High
32.0°F
0
Rec* Low
32.0°F
0
* Records from Weather Underground
Day time Day time

Wind from SW Wind:  SW
0.8

Gusting to:
5.0 mph
Current Rain Rain:
0.01 in
Chandler Burning Index: HIGH Current CBI
Fire Danger:
76.3 of 100
This
Afternoon
This Afternoon: Sunny
Sunny
Tonight

Tonight: Partly Cloudy
Partly Cloudy
Thursday

Thursday: Partly Sunny then Showers And Thunderstorms Likely
Partly Sunny then Showers And T-Storms Likely
Hi 64 °F Lo 40 °F Hi 60 °F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 7.6°F since last hour. 25.9°F
Last Hour: Decreased 7.6°F since last hour. 7.6°F
High 8:17 AM: 52.4°F
Low 2:45 PM: 24.7°F
Record High: 52.4°F on
Feb-18-2026
Record Low: -22.2°F on
Jan-23-2026
Wetbulb: 48.2°F
Rain Today
rain graph

Today: 0.01 in
Yesterday: 0.09 in
Last 7 Days: 0.13 in
Feb Rain: 0.22 in
Feb to Date
  Avg:10
0.00 in
Feb to Date
  Diff from Avg:10
Over 0.22 in for the month 0.22 in
Feb Avg: 0.00 in
Diff from Avg: Over 0.22 in for the month 0.22 in
Season:1 0.27 in
YTD
  Avg:11
0.05 in
YTD
  Diff from Avg:11
Over 0.22 in for the year 0.22 in
Last Rain
Time/Date:
Feb-18-2026
at 12:20 AM
5 rain days in 2026
5 days in February
0 days since last rain
Current: SW  0.8 mph
1Hr Average: 4.6 mph
Wind Run: 25.13 miles
Wind Gust
Current: 5.0 mph
Today: 21.0 mph 2:17 PM
Month: 21.0 mph 18-Feb
Year: 22.0 mph 22-Jan
Record Gust: 22.0 mph
Jan-22-2026
Sunlight:
10 h 55 m 57 s
of Sunlight Yesterday
10 h 58 m 12 s
of Sunlight Today
Which is
2 min 15 sec longer than
yesterday
0 h 0 m 0 s
of Sunlight Tomorrow
(Noon) graph (Midnight)
Legend

Waxing Crescent
Waxing Crescent, 1 days, 8 hours, 59 minutes in cycle
2%
Illuminated
Humidity Barometer
Current: Decreased 8% since last hour. 24%
Last Hour: Decreased 8% since last hour. 8%
High 12:00 AM: 93%
Low 2:45 PM: 23%
Record High: 95%
Feb-13-2026
Record Low: 23%
Feb-18-2026
Current: Rising 0.008  inHg/hr 29.497 inHg
Last Hour: Steady
High 12:00 AM: 29.590
Low 4:18 AM: 29.430
Record High: 30.829 inHg
Jan-24-2026
Record Low: 29.430 inHg
Feb-18-2026
Heating Degree Days Coming Soon Wind Chill Air
Today: 7.0
Feb: 575.5
2026 to Date: 1476.6
Cooling Degree Days
2026 to Date: 0.0
Current: 63.3°F
Low 12:00 AM: 51.4°F
Yesterday: 37.7°F
Record: -27.0°F
Jan-23-2026
Quality
Index6:

34


Good
Density:
1.20 kg/m3
UV Summary/Forecast Solar Summary
Feb-18

2.9
Feb-19

2.8
Feb-20

3.0
Sunrise is at: 6:43 am
Solar Noon: 12:05
Sunset is at: 5:28 pm
Almanac   Station All Time Records Cloud Level
Currently: Afternoon
YTD Avg Temp: 23.2°F
Sunrise: 6:43 am
Sunset: 5:28 pm
Moonrise: 7:17 am
Moonset: 5:48 pm
Full Moon: Mar-03-2026
New Moon: 01:24 UTC
Mar-19-2026
HIGHS: LOWS:
65.6°F
Feb-16-2026
-9.8°F
Jan-23-2026
Daytime Records
  55.6°F
Feb-16-2026
  -6.3°F
Jan-23-2026
Nitetime Records
  51.6°F
Feb-18-2026
  -8.1°F
Jan-24-2026
ICN:5 | S3C2:0 | Ajax 3.xx
ISS:Ok | CON:4.5 | RCP:100%
METRIC | IMPERIAL
Updated: 18-Feb-2026 @ 3:00pm  
1 Rain season: Jan 1st to Dec 31st.   2 Snow season July 1st to June 30th.   3 Snow manually measured usually around 7AM and 7PM.   6 Air Quality Index is provided by Minnesota Polution Control Agency and is updated hourly between the hours of 6AM and Midnight.   10 Historical average only to day 18 of just the month of February for this station since 2012.   11 Historical average rain this season to day 18 of February for this station since 2012.
 NWS Weather Forecast   -   Outlook This Afternoon & Tonight
This
Afternoon
This Afternoon: Sunny
Sunny

Hi 64 °F
NWS forecast: Sunny. High near 64, with temperatures falling to around 57 in the afternoon. West southwest wind 20 to 30 mph, with gusts as high as 45 mph.
Local station forecast: Mostly cloudy and cooler, precipitation possible within 12 hours, possibly heavy at times, windy.
Tonight

Tonight: Partly Cloudy
Partly Cloudy

Lo 40 °F
NWS forecast: Partly cloudy, with a low around 40. South wind 5 to 15 mph, with gusts as high as 25 mph.
 NWS Short Term Weather Forecast
Thursday

Thursday: Partly Sunny then Showers And Thunderstorms Likely
Partly Sunny then Showers And T-Storms Likely
Thursday
Night
Thursday Night: Showers And Thunderstorms Likely then Chance Rain
Showers And T-Storms Likely then Chance Rain
Friday

Friday: Slight Chance Snow then Mostly Cloudy
Slight Chance Snow then Mostly Cloudy
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Saturday

Saturday: Mostly Sunny
Mostly Sunny
Saturday
Night
Saturday Night: Mostly Cloudy
Mostly Cloudy
Sunday

Sunday: Slight Chance Snow then Partly Sunny
Slight Chance Snow then Partly Sunny
Hi 60 °F Lo 34 °F Hi 42 °F Lo 25 °F Hi 37 °F Lo 22 °F Hi 32 °F



Current Conditions
US Fronts from NWS
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Today's Sky Cover
Current Sat/Rad/Fronts from SSEC.edu
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Radar/Satellite images courtesy of NOAA/NWS and Weather Underground.
Current US Satellite Provided courtesy of UW-Madison SSEC"
Current US Satellite Animation Provided courtesy of NOAA"
Jetstream from WeatherUnderground.com
Tropical Update
Sea Surface Tempeatures from SSEC.wisc.edu
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