10-day forecast for Ottawa, IL: 43° to 69°, with precipitation expected on 6 days. The table below breaks each day into morning, afternoon, evening and overnight.
69°
Best day: Sunday, November 1
65° · 0.58 in
Worst day: Wednesday, November 4
Tap any day below to see morning, afternoon, evening and overnight.
Sat, 3165° / 54°0.04
Morning54°feels 52°
Afternoon64°feels 63°
Evening57°feels 56°
Overnight55°feels 54°
65 °
Ottawa, Saturday, 31 October
Light rain. High 65°, low 54°.
Pressure30.33 inHg
Wind6.7 mph SE
Humidity63%
Visibility6.2 mi
Dew point47°
Sun, 0169° / 53°0
Morning53°feels 52°
Afternoon69°feels 69°
Evening60°feels 60°
Overnight54°feels 53°
69 °
Ottawa, Sunday, 1 November
Overcast. High 69°, low 53°.
Pressure30.30 inHg
Wind7.7 mph S
Humidity64%
Visibility6.2 mi
Dew point56°
Mon, 0263° / 56°0.08
Morning57°feels 56°
Afternoon61°feels 60°
Evening62°feels 62°
Overnight56°feels 56°
63 °
Ottawa, Monday, 2 November
Light rain. High 63°, low 56°.
Pressure30.09 inHg
Wind10 mph SE
Humidity78%
Visibility6.2 mi
Dew point53°
Tue, 0369° / 62°0.31
Morning65°feels 65°
Afternoon68°feels 68°
Evening65°feels 66°
Overnight62°feels 62°
69 °
Ottawa, Tuesday, 3 November
Light rain. High 69°, low 62°.
Pressure29.80 inHg
Wind18.9 mph S
Humidity78%
Visibility—
Dew point61°
Wed, 0465° / 59°0.58
Morning61°feels 60°
Afternoon62°feels 62°
Evening59°feels 58°
Overnight60°feels 59°
65 °
Ottawa, Wednesday, 4 November
Rain. High 65°, low 59°.
Pressure29.74 inHg
Wind15 mph S
Humidity67%
Visibility—
Dew point51°
Thu, 0560° / 51°0.06
Morning56°feels 56°
Afternoon56°feels 56°
Evening54°feels 53°
Overnight52°feels 51°
60 °
Ottawa, Thursday, 5 November
Light rain. High 60°, low 51°.
Pressure29.68 inHg
Wind14.7 mph N
Humidity82%
Visibility—
Dew point51°
Fri, 0656° / 44°0
Morning47°feels 43°
Afternoon53°feels 51°
Evening48°feels 46°
Overnight46°feels 42°
56 °
Ottawa, Friday, 6 November
Partly cloudy. High 56°, low 44°.
Pressure30.09 inHg
Wind9.1 mph N
Humidity48%
Visibility—
Dew point34°
Sat, 0759° / 43°0
Morning46°feels 43°
Afternoon55°feels 53°
Evening53°feels 51°
Overnight52°feels 50°
59 °
Ottawa, Saturday, 7 November
Overcast. High 59°, low 43°.
Pressure30.27 inHg
Wind8.2 mph S
Humidity52%
Visibility—
Dew point37°
Sun, 0860° / 51°0.11
Morning55°feels 53°
Afternoon59°feels 57°
Evening53°feels 51°
Overnight51°feels 50°
60 °
Ottawa, Sunday, 8 November
Light rain. High 60°, low 51°.
Pressure30.15 inHg
Wind13.6 mph NW
Humidity53%
Visibility—
Dew point42°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Ottawa, IL around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.