National Weather Service forecast

Ottawa, Illinois Weather

58°Overnight: Rain Showers
Wind S 15 mph
7-DayHourlyRadar

Ottawa 7-Day Forecast

  1. Overnight
    58°F
    Rain Showers
    84% chance of precipitation

    Rain showers. Cloudy. Low around 58, with temperatures rising to around 61 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
    62°F
    Slight Chance Rain Showers then Mostly Cloudy
    18% chance of precipitation

    A slight chance of rain showers before noon. Mostly cloudy. High near 62, with temperatures falling to around 56 in the afternoon. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

  3. Wednesday Night
    47°F
    Mostly Cloudy
    10% chance of precipitation

    Mostly cloudy, with a low around 47. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

  4. Thursday
    57°F
    Mostly Cloudy then Chance Rain Showers
    31% chance of precipitation

    A chance of rain showers after 1pm. Mostly cloudy, with a high near 57. West southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

  5. Thursday Night
    43°F
    Chance Rain Showers
    43% chance of precipitation

    A chance of rain showers. Mostly cloudy, with a low around 43. Northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

  6. Friday
    51°F
    Partly Sunny
    8% chance of precipitation

    Partly sunny, with a high near 51.

  7. Friday Night
    33°F
    Partly Cloudy

    Partly cloudy, with a low around 33.

  8. Saturday
    52°F
    Sunny

    Sunny, with a high near 52.

  9. Saturday Night
    34°F
    Mostly Clear
    1% chance of precipitation

    Mostly clear, with a low around 34.

  10. Sunday
    56°F
    Sunny
    4% chance of precipitation

    Sunny, with a high near 56.

  11. Sunday Night
    35°F
    Clear

    Clear, with a low around 35.

  12. Monday
    62°F
    Sunny

    Sunny, with a high near 62.

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

    Mostly clear, with a low around 40.

  14. Tuesday
    62°F
    Sunny
    1% chance of precipitation

    Sunny, with a high near 62.

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

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About Ottawa

Population (2020 Census)
18,840
Coordinates
41.354, -88.823
Elevation
476 ft
NWS forecast office
LOT
Time zone
America/Chicago
Sunrise today
6:30 AM CST
Sunset today
4:47 PM CST
Daylight today
10 h 17 min

Ottawa Weather Questions

What is the weather forecast for Ottawa, Illinois?

Overnight: Rain showers. Cloudy. Low around 58, with temperatures rising to around 61 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 62, with temperatures falling to around 56 in the afternoon. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

Will it rain or snow in Ottawa this week?

The best chance of precipitation is Overnight at 84%. Periods with a 30% chance or more: Overnight (84%), Thursday (31%), Thursday Night (43%).

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

The warmest day is Wednesday, with a high near 62°F. The coldest night is Friday Night, with a low near 33°F.

What time are sunrise and sunset in Ottawa today?

Sunrise is at 6:30 AM CST and sunset is at 4:47 PM CST, for 10 h 17 min of daylight.

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