10-day forecast for Ottawa, IL: 46° to 73°, with precipitation expected on 3 days. The table below breaks each day into morning, afternoon, evening and overnight.
73°
Best day: Sunday, October 25
70° · 1.34 in
Worst day: Monday, November 2
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 2670° / 50°0
Morning52°feels 52°
Afternoon69°feels 68°
Evening55°feels 55°
Overnight52°feels 51°
70 °
Ottawa, Monday, 26 October
Overcast. High 70°, low 50°.
Pressure30.33 inHg
Wind4.3 mph E
Humidity61%
Visibility6.2 mi
Dew point52°
Tue, 2771° / 49°0
Morning50°feels 49°
Afternoon71°feels 70°
Evening61°feels 60°
Overnight50°feels 49°
71 °
Ottawa, Tuesday, 27 October
Partly cloudy. High 71°, low 49°.
Pressure30.24 inHg
Wind5.7 mph SE
Humidity66%
Visibility6.2 mi
Dew point54°
Wed, 2872° / 52°0
Morning53°feels 52°
Afternoon72°feels 71°
Evening63°feels 62°
Overnight56°feels 55°
72 °
Ottawa, Wednesday, 28 October
Clear. High 72°, low 52°.
Pressure30.18 inHg
Wind8.9 mph S
Humidity55%
Visibility6.2 mi
Dew point53°
Thu, 2972° / 58°0.03
Morning62°feels 62°
Afternoon71°feels 71°
Evening65°feels 65°
Overnight60°feels 59°
72 °
Ottawa, Thursday, 29 October
Light rain. High 72°, low 58°.
Pressure30.09 inHg
Wind10.8 mph S
Humidity58%
Visibility—
Dew point55°
Fri, 3072° / 56°0.02
Morning60°feels 60°
Afternoon68°feels 69°
Evening63°feels 63°
Overnight61°feels 61°
72 °
Ottawa, Friday, 30 October
Light rain. High 72°, low 56°.
Pressure30.12 inHg
Wind6.6 mph SE
Humidity72%
Visibility—
Dew point58°
Sat, 3171° / 60°0.02
Morning64°feels 62°
Afternoon70°feels 69°
Evening65°feels 65°
Overnight64°feels 63°
71 °
Ottawa, Saturday, 31 October
Light rain. High 71°, low 60°.
Pressure30.12 inHg
Wind8.3 mph SW
Humidity43%
Visibility—
Dew point46°
Sun, 0163° / 60°0.23
Morning60°feels 60°
Afternoon60°feels 60°
Evening61°feels 61°
Overnight61°feels 61°
63 °
Ottawa, Sunday, 1 November
Light rain. High 63°, low 60°.
Pressure30.03 inHg
Wind11.6 mph S
Humidity93%
Visibility—
Dew point58°
Mon, 0270° / 59°1.34
Morning63°feels 63°
Afternoon69°feels 70°
Evening68°feels 68°
Overnight65°feels 65°
70 °
Ottawa, Monday, 2 November
Heavy rain. High 70°, low 59°.
Pressure29.77 inHg
Wind18.2 mph S
Humidity76%
Visibility—
Dew point60°
Tue, 0364° / 46°0.62
Morning58°feels 58°
Afternoon56°feels 54°
Evening49°feels 43°
Overnight49°feels 44°
64 °
Ottawa, Tuesday, 3 November
Heavy rain. High 64°, low 46°.
Pressure29.71 inHg
Wind19.1 mph W
Humidity75%
Visibility—
Dew point49°
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.