DeKalb, Illinois Weather Forecast
Today in DeKalb: clear skies with a high near 72°F and a low around 49°F. Rain chance 1%. No day tops a 20% rain chance through Thursday. Highs run 64 to 73°F through Thursday.
Forecast updated 3:05 AM CDT, Oct 23
Active Weather Alerts
7-Day Forecast for DeKalb
Today 10/23
72°49°
Sat 10/24
71°49°
Sun 10/25
73°51°
Mon 10/26
67°51°
Tue 10/27
64°49°
Wed 10/28
68°49°
Thu 10/29
19%
66°49°
Next 24 Hours
| Now | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | Sat12 AM | 1 AM | 2 AM | 3 AM | 4 AM | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sky |  | | | | | | | | | | | | | | |  | | | | | | | | |
| Temp | 49° | 49° | 49° | 50° | 55° | 60° | 65° | 68° | 70° | 72° | 72° | 72° | 70° | 66° | 62° | 59° | 57° | 56° | 55° | 54° | 53° | 52° | 51° | 50° |
| Rain | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 2% | 2% |
| Wind | SE 3 | SE 3 | SE 3 | SE 4 | SE 5 | SSE 5 | SSE 6 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SE 7 | SE 6 | ESE 6 | ESE 5 | ESE 6 | ESE 6 | SE 6 | SE 6 | SE 5 | SE 5 | SSE 5 | SSE 5 | SSE 5 |
Growing Conditions
Growing degree days
3,314
since Apr 1, base 50°F
Rain, last 30 days
2.84 in
model analysis
Rain, year to date
49.64 in
since Jan 1
2-inch soil temperature
54°F
yesterday, daily average
Reference ET, last 7 days
0.61 in
FAO-56 grass reference
Through Oct 22. Season totals use model analysis for this point and update every morning.
Soil, ET and spray tools for DeKalb →
Current Stats & Observations
NWS Forecast
About DeKalb Weather
DeKalb sits at about 889 feet above sea level in DeKalb County, Illinois. About 66,959 people live in the DeKalb area. Official forecasts and warnings for the area come from the National Weather Service LOT office, and the nearest NEXRAD radar site is KLOT. The city is in USDA plant hardiness zone 5b, where the coldest winter night typically falls between -15 to -10°F. Over the past ten years the last spring freeze has come around Apr 26 and the first fall freeze around Oct 29.
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