Current Conditions

DeKalb, Illinois

74°F23°C
Rain

Wind

SW 6 mph10 km/h

Humidity

66%

Cloud Cover

97%

As of Tuesday, September 8, 2026 at 11:59 PM CDT

Today's Outlook

Night

Overcast, with a low around 72°F22°C. Breezy from the WSW at 7 to 8 mph11 to 12 km/h. 75% chance of light rain before dawn.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
RainHigh 80°F27°CLow 71°F22°CPrecip 0.53 in13.4 mm100%Cloud 88%Wind WSW 8 mph12 km/hWednesday: Overcast and warm, with a high of 80°F27°C and morning low of 71°F22°C. Breezy from the WSW at 9 to 10 mph14 to 16 km/h. 100% chance of rain throughout the day. Humid. Wednesday Night: Overcast, with a low around 72°F22°C. Breezy from the WSW at 7 to 8 mph11 to 12 km/h. 75% chance of light rain before dawn.
Partly CloudyHigh 79°F26°CLow 64°F18°CPrecip 0 in0 mmCloud 69%Wind N 5 mph8 km/hThursday: Overcast and warm, with a high of 79°F26°C and morning low of 64°F18°C. Light wind from the NNE around 5 mph8 km/h. Thursday Night: Mostly cloudy, with a low around 64°F18°C. Light wind from the NNW around 5 mph8 km/h.
ClearHigh 82°F28°CLow 56°F14°CPrecip 0 in0 mmCloud 15%Wind SSE 6 mph9 km/hFriday: Mostly clear and warm, with a high of 82°F28°C and morning low of 56°F14°C. Breezy from the SSE at 6 to 7 mph10 to 11 km/h. Friday Night: Mostly clear, with a low around 57°F14°C. Breezy from the SE at 5 to 7 mph9 to 11 km/h.
DrizzleHigh 84°F29°CLow 64°F18°CPrecip 0.03 in0.8 mm14%Cloud 48%Wind SW 7 mph12 km/hSaturday: Mostly cloudy and warm, with a high of 84°F29°C and morning low of 64°F18°C. Breezy from the SW at 9 to 10 mph14 to 17 km/h. 14% chance of drizzle in the afternoon. Humid. Saturday Night: Partly cloudy, with a low around 65°F18°C. Breezy from the SW at 6 to 7 mph10 to 11 km/h. 14% chance of drizzle in the evening.
DrizzleHigh 76°F25°CLow 60°F16°CPrecip 0.03 in0.8 mm10%Cloud 35%Wind N 7 mph11 km/hSunday: Partly cloudy and warm, with a high of 76°F25°C and morning low of 60°F16°C. Breezy from the NNW at 8 mph12 km/h. 10% chance of drizzle in the afternoon. Sunday Night: Partly cloudy, with a low around 62°F17°C. Breezy from the N at 6 to 7 mph10 to 11 km/h.
ShowersHigh 79°F26°CLow 58°F14°CPrecip 0.19 in4.8 mm31%Cloud 54%Wind SSE 10 mph17 km/hMonday: Mostly cloudy and warm, with a high of 79°F26°C and morning low of 58°F14°C. Breezy from the SE at 11 to 14 mph17 to 22 km/h. 31% chance of showers throughout the day. Monday Night: Partly cloudy, with a low around 58°F15°C. Breezy from the SSE at 10 to 14 mph16 to 22 km/h. 17% chance of showers throughout the night.
Light RainHigh 83°F28°CLow 70°F21°CPrecip 0.17 in4.3 mm33%Cloud 71%Wind SW 10 mph16 km/hTuesday: Mostly cloudy and warm, with a high of 83°F28°C and morning low of 70°F21°C. Breezy from the SW at 11 to 12 mph17 to 19 km/h. 24% chance of drizzle throughout the day. Tuesday Night: Mostly cloudy, with a low around 70°F21°C. Breezy from the SSW at 10 to 14 mph16 to 22 km/h. 33% chance of light rain throughout the night.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
WednesdaySep 980°F27°C71°F22°C0.53 in13.4 mm· 100%88%RainWSW 8 mph12 km/h
ThursdaySep 1079°F26°C64°F18°C0 in0 mm· —69%Partly CloudyN 5 mph8 km/h
FridaySep 1182°F28°C56°F14°C0 in0 mm· —15%ClearSSE 6 mph9 km/h
SaturdaySep 1284°F29°C64°F18°C0.03 in0.8 mm· 14%48%DrizzleSW 7 mph12 km/h
SundaySep 1376°F25°C60°F16°C0.03 in0.8 mm· 10%35%DrizzleN 7 mph11 km/h
MondaySep 1479°F26°C58°F14°C0.19 in4.8 mm· 31%54%ShowersSSE 10 mph17 km/h
TuesdaySep 1583°F28°C70°F21°C0.17 in4.3 mm· 33%71%Light RainSW 10 mph16 km/h
WednesdaySep 1679°F26°C64°F18°C0.32 in8.2 mm· 40%70%ShowersE 7 mph11 km/h
ThursdaySep 1783°F28°C68°F20°C0.25 in6.3 mm· 29%55%ShowersSSW 9 mph15 km/h
FridaySep 1877°F25°C64°F18°C0.18 in4.5 mm· 21%50%ShowersWSW 9 mph15 km/h
SaturdaySep 1972°F22°C57°F14°C0.11 in2.7 mm· 16%51%ShowersWNW 8 mph13 km/h
SundaySep 2069°F21°C53°F12°C0.11 in2.8 mm· 15%50%ShowersN 8 mph13 km/h
MondaySep 2169°F21°C51°F11°C0.09 in2.4 mm· 10%51%DrizzleENE 8 mph12 km/h
TuesdaySep 2271°F21°C52°F11°C0.11 in2.7 mm· 15%54%ShowersESE 7 mph12 km/h
WednesdaySep 2372°F22°C54°F12°C0.09 in2.2 mm· 16%52%DrizzleS 7 mph12 km/h

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 41.9295°N, 88.7504°W·Elevation: 268m·Timezone: America/Chicago·Population: 43,211