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As of 06:46 CDT

Weather in Ottawa, IL

53°Current weather

Ottawa, Friday, 9 October, 06:46

Overcast. Feels like 52°. High 77°, low 53°.

Pressure30.12 inHg
Wind4 mph E
Humidity87%
Visibility6.2 mi
Dew point49°
Sat, 1080° / 58°0Overcast
80 °Overcast

Ottawa, Saturday, 10 October

Overcast. High 80°, low 58°.

Pressure30.09 inHg
Wind7.9 mph SE
Humidity50%
Visibility6.2 mi
Dew point54°
Sun, 1173° / 56°0Clear
73 °Clear

Ottawa, Sunday, 11 October

Clear. High 73°, low 56°.

Pressure29.91 inHg
Wind2.2 mph NE
Humidity67%
Visibility6.2 mi
Dew point57°
Mon, 1283° / 59°0Partly cloudy
83 °Partly cloudy

Ottawa, Monday, 12 October

Partly cloudy. High 83°, low 59°.

Pressure29.83 inHg
Wind10 mph SW
Humidity54%
Visibility6.2 mi
Dew point62°
Tue, 1383° / 63°0Overcast
83 °Overcast

Ottawa, Tuesday, 13 October

Overcast. High 83°, low 63°.

Pressure29.80 inHg
Wind13.8 mph NE
Humidity65%
Visibility—
Dew point66°
Wed, 1474° / 61°0.32Rain
74 °Rain

Ottawa, Wednesday, 14 October

Rain. High 74°, low 61°.

Pressure29.85 inHg
Wind10.1 mph E
Humidity88%
Visibility—
Dew point67°
Thu, 1573° / 58°0.97Rain
73 °Rain

Ottawa, Thursday, 15 October

Rain. High 73°, low 58°.

Pressure29.80 inHg
Wind20.8 mph SW
Humidity87%
Visibility—
Dew point63°
Fri, 1659° / 46°0Partly cloudy
59 °Partly cloudy

Ottawa, Friday, 16 October

Partly cloudy. High 59°, low 46°.

Pressure30.00 inHg
Wind23.5 mph W
Humidity48%
Visibility—
Dew point33°
Sat, 1747° / 43°0Overcast
47 °Overcast

Ottawa, Saturday, 17 October

Overcast. High 47°, low 43°.

Pressure30.30 inHg
Wind14.5 mph W
Humidity62%
Visibility—
Dew point33°
Sun, 1855° / 38°0Mostly clear
55 °Mostly clear

Ottawa, Sunday, 18 October

Mostly clear. High 55°, low 38°.

Pressure30.33 inHg
Wind6.6 mph SW
Humidity48%
Visibility—
Dew point31°
Mon, 1960° / 42°0Overcast
60 °Overcast

Ottawa, Monday, 19 October

Overcast. High 60°, low 42°.

Pressure30.36 inHg
Wind5.4 mph E
Humidity44%
Visibility—
Dew point34°
Tue, 2064° / 45°0Clear
64 °Clear

Ottawa, Tuesday, 20 October

Clear. High 64°, low 45°.

Pressure30.39 inHg
Wind7.7 mph SE
Humidity41%
Visibility—
Dew point35°
Wed, 2166° / 46°0Clear
66 °Clear

Ottawa, Wednesday, 21 October

Clear. High 66°, low 46°.

Pressure30.30 inHg
Wind6.5 mph SE
Humidity42%
Visibility—
Dew point38°
Thu, 2267° / 48°0Clear
67 °Clear

Ottawa, Thursday, 22 October

Clear. High 67°, low 48°.

Pressure30.27 inHg
Wind6.8 mph NE
Humidity43%
Visibility—
Dew point40°
Fri, 2367° / 48°0Clear
67 °Clear

Ottawa, Friday, 23 October

Clear. High 67°, low 48°.

Pressure30.21 inHg
Wind7.4 mph NE
Humidity50%
Visibility—
Dew point44°
Sat, 2467° / 49°0Clear
67 °Clear

Ottawa, Saturday, 24 October

Clear. High 67°, low 49°.

Pressure30.12 inHg
Wind6.2 mph E
Humidity47%
Visibility—
Dew point43°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Ottawa, IL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Ottawa, IL since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.