National Weather Service forecast

DeKalb, Illinois Weather

57°Overnight: Rain Showers
Wind S 15 mph
7-DayHourlyRadar

DeKalb 7-Day Forecast

  1. Overnight
    57°F
    Rain Showers
    78% chance of precipitation

    Rain showers. Cloudy. Low around 57, with temperatures rising to around 59 overnight. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.

  2. Wednesday
    61°F
    Slight Chance Rain Showers then Mostly Cloudy
    20% chance of precipitation

    A slight chance of rain showers before noon. Mostly cloudy. High near 61, with temperatures falling to around 54 in the afternoon. South southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

  3. Wednesday Night
    46°F
    Slight Chance Rain Showers
    15% chance of precipitation

    A slight chance of rain showers. Cloudy, with a low around 46. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

  4. Thursday
    55°F
    Chance Rain Showers
    46% chance of precipitation

    A chance of rain showers. Cloudy, with a high near 55. West southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

  5. Thursday Night
    40°F
    Chance Rain Showers then Mostly Cloudy
    37% chance of precipitation

    A chance of rain showers before midnight. Mostly cloudy, with a low around 40. Northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

  6. Friday
    49°F
    Partly Sunny
    9% chance of precipitation

    Partly sunny, with a high near 49.

  7. Friday Night
    31°F
    Partly Cloudy

    Partly cloudy, with a low around 31.

  8. Saturday
    51°F
    Sunny

    Sunny, with a high near 51.

  9. Saturday Night
    33°F
    Mostly Clear
    1% chance of precipitation

    Mostly clear, with a low around 33.

  10. Sunday
    55°F
    Sunny
    5% chance of precipitation

    Sunny, with a high near 55.

  11. Sunday Night
    35°F
    Mostly Clear

    Mostly clear, with a low around 35.

  12. Monday
    60°F
    Sunny

    Sunny, with a high near 60.

  13. Monday Night
    40°F
    Mostly Clear
    1% chance of precipitation

    Mostly clear, with a low around 40.

  14. Tuesday
    61°F
    Sunny

    Sunny, with a high near 61.

Issued by the National Weather Service (LOT office), updated .

DeKalb Hourly Forecast

Loading the next 48 hours…

Full 100+ hour forecast for DeKalb

DeKalb Weather Radar

Open the full radar for DeKalb

About DeKalb

Population (2020 Census)
40,290
Coordinates
41.932, -88.748
Elevation
850 ft
NWS forecast office
LOT
Time zone
America/Chicago
Sunrise today
6:31 AM CST
Sunset today
4:46 PM CST
Daylight today
10 h 15 min

DeKalb Weather Questions

What is the weather forecast for DeKalb, Illinois?

Overnight: Rain showers. Cloudy. Low around 57, with temperatures rising to around 59 overnight. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible. Wednesday: A slight chance of rain showers before noon. Mostly cloudy. High near 61, with temperatures falling to around 54 in the afternoon. South southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

Will it rain or snow in DeKalb this week?

The best chance of precipitation is Overnight at 78%. Periods with a 30% chance or more: Overnight (78%), Thursday (46%), Thursday Night (37%).

How warm and how cold will it get in DeKalb this week?

The warmest day is Wednesday, with a high near 61°F. The coldest night is Friday Night, with a low near 31°F.

What time are sunrise and sunset in DeKalb today?

Sunrise is at 6:31 AM CST and sunset is at 4:46 PM CST, for 10 h 15 min of daylight.

Weather near DeKalb

Largest cities in Illinois

All Illinois cities