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As of 20:59 CDT

Weather in Ottawa, IL

65°Current weather

Ottawa, Friday, 9 October, 20:59

Clear. Feels like 64°. High 73°, low 53°.

Pressure30.03 inHg
Wind7.5 mph SE
Humidity78%
Visibility6.2 mi
Dew point58°
Sat, 1080° / 60°0Overcast
80 °Overcast

Ottawa, Saturday, 10 October

Overcast. High 80°, low 60°.

Pressure30.09 inHg
Wind8.7 mph S
Humidity53%
Visibility6.2 mi
Dew point56°
Sun, 1175° / 57°0Clear
75 °Clear

Ottawa, Sunday, 11 October

Clear. High 75°, low 57°.

Pressure29.94 inHg
Wind2.8 mph SE
Humidity64%
Visibility6.2 mi
Dew point58°
Mon, 1282° / 61°0Mostly clear
82 °Mostly clear

Ottawa, Monday, 12 October

Mostly clear. High 82°, low 61°.

Pressure29.83 inHg
Wind11 mph SW
Humidity54%
Visibility6.2 mi
Dew point61°
Tue, 1379° / 65°0Clear
79 °Clear

Ottawa, Tuesday, 13 October

Clear. High 79°, low 65°.

Pressure29.83 inHg
Wind9.4 mph NW
Humidity67%
Visibility6.2 mi
Dew point67°
Wed, 1468° / 60°0.07Light rain
68 °Light rain

Ottawa, Wednesday, 14 October

Light rain. High 68°, low 60°.

Pressure30.09 inHg
Wind9.6 mph NE
Humidity65%
Visibility—
Dew point55°
Thu, 1565° / 54°0.04Light rain
65 °Light rain

Ottawa, Thursday, 15 October

Light rain. High 65°, low 54°.

Pressure30.27 inHg
Wind13.7 mph E
Humidity59%
Visibility—
Dew point47°
Fri, 1664° / 47°0.01Light rain
64 °Light rain

Ottawa, Friday, 16 October

Light rain. High 64°, low 47°.

Pressure29.85 inHg
Wind25 mph W
Humidity53%
Visibility—
Dew point43°
Sat, 1745° / 36°0.02Light rain
45 °Light rain

Ottawa, Saturday, 17 October

Light rain. High 45°, low 36°.

Pressure30.33 inHg
Wind22.7 mph W
Humidity52%
Visibility—
Dew point26°
Sun, 1852° / 32°0Clear
52 °Clear

Ottawa, Sunday, 18 October

Clear. High 52°, low 32°.

Pressure30.42 inHg
Wind13.1 mph S
Humidity31%
Visibility—
Dew point18°
Mon, 1961° / 39°0Clear
61 °Clear

Ottawa, Monday, 19 October

Clear. High 61°, low 39°.

Pressure30.36 inHg
Wind7.5 mph SW
Humidity36%
Visibility—
Dew point29°
Tue, 2065° / 49°0Overcast
65 °Overcast

Ottawa, Tuesday, 20 October

Overcast. High 65°, low 49°.

Pressure30.24 inHg
Wind13.4 mph S
Humidity33%
Visibility—
Dew point32°
Wed, 2164° / 50°0.15Light rain
64 °Light rain

Ottawa, Wednesday, 21 October

Light rain. High 64°, low 50°.

Pressure30.03 inHg
Wind17.1 mph S
Humidity54%
Visibility—
Dew point45°
Thu, 2261° / 55°0.35Light rain
61 °Light rain

Ottawa, Thursday, 22 October

Light rain. High 61°, low 55°.

Pressure29.68 inHg
Wind16.2 mph SE
Humidity84%
Visibility—
Dew point54°
Fri, 2364° / 55°0Overcast
64 °Overcast

Ottawa, Friday, 23 October

Overcast. High 64°, low 55°.

Pressure29.94 inHg
Wind10.8 mph NW
Humidity76%
Visibility—
Dew point53°
Sat, 2455° / 46°0Overcast
55 °Overcast

Ottawa, Saturday, 24 October

Overcast. High 55°, low 46°.

Pressure29.97 inHg
Wind17.4 mph W
Humidity58%
Visibility—
Dew point40°

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.