Current Conditions

Ottawa, Illinois

59°F15°C
Drizzle

Wind

ENE 8 mph14 km/h

Humidity

80%

Cloud Cover

79%

As of Tuesday, September 22, 2026 at 12:44 AM CDT

Today's Outlook

Day

Overcast and mild, with a high of 62°F17°C and morning low of 56°F13°C. Breezy from the ENE at 10 to 12 mph16 to 19 km/h. 34% chance of drizzle throughout the day.

Night

Mostly cloudy, with a low around 57°F14°C. Breezy from the NE at 8 to 9 mph13 to 15 km/h. 19% chance of drizzle before dawn.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
DrizzleHigh 62°F17°CLow 56°F13°CPrecip 0.06 in1.5 mm34%Cloud 77%Wind ENE 9 mph15 km/hTuesday: Overcast and mild, with a high of 62°F17°C and morning low of 56°F13°C. Breezy from the ENE at 10 to 12 mph16 to 19 km/h. 34% chance of drizzle throughout the day. Tuesday Night: Mostly cloudy, with a low around 57°F14°C. Breezy from the NE at 8 to 9 mph13 to 15 km/h. 19% chance of drizzle before dawn.
CloudyHigh 67°F20°CLow 58°F14°CPrecip 0 in0.1 mm4%Cloud 84%Wind NE 9 mph14 km/hWednesday: Overcast and mild, with a high of 67°F20°C and morning low of 58°F14°C. Breezy from the NE at 10 to 12 mph17 to 19 km/h. Wednesday Night: Overcast, with a low around 58°F15°C. Breezy from the NE at 7 to 8 mph12 to 13 km/h.
Partly CloudyHigh 69°F21°CLow 56°F13°CPrecip 0 in0 mmCloud 71%Wind ENE 6 mph10 km/hThursday: Mostly cloudy and warm, with a high of 69°F21°C and morning low of 56°F13°C. Breezy from the ENE at 6 to 7 mph10 to 11 km/h. Thursday Night: Mostly cloudy, with a low around 56°F13°C. Light wind from the ENE around 6 mph9 km/h.
Partly CloudyHigh 71°F22°CLow 58°F15°CPrecip 0.01 in0.2 mm4%Cloud 75%Wind ENE 5 mph9 km/hFriday: Mostly cloudy and warm, with a high of 71°F22°C and morning low of 58°F15°C. Light wind from the ENE around 5 mph9 km/h. Friday Night: Mostly cloudy, with a low around 59°F15°C. Light wind from the ENE around 5 mph8 km/h.
Partly CloudyHigh 71°F22°CLow 51°F11°CPrecip 0 in0.1 mm4%Cloud 68%Wind E 6 mph9 km/hSaturday: Mostly cloudy and warm, with a high of 71°F22°C and morning low of 51°F11°C. Light wind from the E around 6 mph9 km/h. Dry air. Saturday Night: Mostly cloudy, with a low around 53°F12°C. Light wind from the E around 5 mph9 km/h.
Partly CloudyHigh 73°F23°CLow 51°F11°CPrecip 0.01 in0.3 mm6%Cloud 60%Wind ENE 4 mph7 km/hSunday: Mostly cloudy and warm, with a high of 73°F23°C and morning low of 51°F11°C. Light wind from the E around 4 mph7 km/h. Dry air. Sunday Night: Mostly cloudy, with a low around 53°F12°C. Light wind from the ENE around 5 mph8 km/h.
ClearHigh 75°F24°CLow 51°F10°CPrecip 0 in0 mmCloud 28%Wind ENE 4 mph7 km/hMonday: Partly cloudy and warm, with a high of 75°F24°C and morning low of 51°F10°C. Light wind from the NE around 4 mph6 km/h. Monday Night: Partly cloudy, with a low around 53°F12°C. Light wind from the ENE around 5 mph7 km/h.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
TuesdaySep 2262°F17°C56°F13°C0.06 in1.5 mm· 34%77%DrizzleENE 9 mph15 km/h
WednesdaySep 2367°F20°C58°F14°C0 in0.1 mm· 4%84%CloudyNE 9 mph14 km/h
ThursdaySep 2469°F21°C56°F13°C0 in0 mm· —71%Partly CloudyENE 6 mph10 km/h
FridaySep 2571°F22°C58°F15°C0.01 in0.2 mm· 4%75%Partly CloudyENE 5 mph9 km/h
SaturdaySep 2671°F22°C51°F11°C0 in0.1 mm· 4%68%Partly CloudyE 6 mph9 km/h
SundaySep 2773°F23°C51°F11°C0.01 in0.3 mm· 6%60%Partly CloudyENE 4 mph7 km/h
MondaySep 2875°F24°C51°F10°C0 in0 mm· —28%ClearENE 4 mph7 km/h
TuesdaySep 2976°F24°C53°F11°C0.05 in1.3 mm· 18%58%ShowersSSE 6 mph10 km/h
WednesdaySep 3072°F22°C58°F15°C0.22 in5.7 mm· 26%74%Light RainSSW 8 mph14 km/h
ThursdayOct 171°F22°C57°F14°C0.15 in3.7 mm· 22%64%ShowersW 8 mph13 km/h
FridayOct 271°F22°C55°F13°C0.14 in3.5 mm· 20%58%ShowersE 8 mph13 km/h
SaturdayOct 372°F22°C56°F13°C0.09 in2.4 mm· 16%60%DrizzleSSE 8 mph13 km/h
SundayOct 471°F22°C56°F13°C0.13 in3.3 mm· 16%58%ShowersSW 8 mph13 km/h
MondayOct 571°F21°C55°F13°C0.11 in2.8 mm· 16%50%ShowersSW 8 mph13 km/h
TuesdayOct 671°F22°C54°F12°C0.1 in2.6 mm· 17%49%ShowersSW 8 mph13 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: 41.3456°N, 88.8426°W·Elevation: 147m·Timezone: America/Chicago·Population: 18,342