As of 21:46 CDT

Weather in Ottawa, IL

81°

Ottawa, Monday, 12 October, 21:46

Partly cloudy. Feels like 82°. High 88°, low 62°.

Pressure29.74 inHg

Wind13.8 mph SW

Humidity59%

Visibility6.2 mi

Dew point65°

See detailed hourly forecast

Tue, 1382° / 65°

0.16

82 °

Ottawa, Tuesday, 13 October

Rain. High 82°, low 65°.

Pressure29.85 inHg

Wind8.7 mph W

Humidity64%

Visibility3.4 mi

Dew point63°

Wed, 1475° / 59°

0.41

75 °

Ottawa, Wednesday, 14 October

Heavy rain. High 75°, low 59°.

Pressure30.09 inHg

Wind7.6 mph NE

Humidity62%

Visibility6.2 mi

Dew point56°

Thu, 1560° / 57°

2.1

60 °

Ottawa, Thursday, 15 October

Heavy rain. High 60°, low 57°.

Pressure30.03 inHg

Wind8.3 mph NE

Humidity96%

Visibility1.4 mi

Dew point57°

Fri, 1657° / 46°

57 °

Ottawa, Friday, 16 October

Overcast. High 57°, low 46°.

Pressure30.24 inHg

Wind23.3 mph NW

Humidity51%

Visibility6.2 mi

Dew point36°

Sat, 1758° / 37°

58 °

Ottawa, Saturday, 17 October

Clear. High 58°, low 37°.

Pressure30.47 inHg

Wind9.3 mph SW

Humidity41%

Visibility—

Dew point31°

Sun, 1863° / 45°

63 °

Ottawa, Sunday, 18 October

Mostly clear. High 63°, low 45°.

Pressure30.24 inHg

Wind13.3 mph SW

Humidity44%

Visibility—

Dew point37°

Mon, 1961° / 47°

0.02

61 °

Ottawa, Monday, 19 October

Light rain. High 61°, low 47°.

Pressure30.24 inHg

Wind8.7 mph SW

Humidity57%

Visibility—

Dew point41°

Tue, 2062° / 55°

0.23

62 °

Ottawa, Tuesday, 20 October

Rain. High 62°, low 55°.

Pressure30.18 inHg

Wind9.7 mph SE

Humidity88%

Visibility—

Dew point57°

Wed, 2171° / 56°

0.05

71 °

Ottawa, Wednesday, 21 October

Light rain. High 71°, low 56°.

Pressure30.18 inHg

Wind12.5 mph S

Humidity67%

Visibility—

Dew point57°

Thu, 2275° / 60°

75 °

Ottawa, Thursday, 22 October

Overcast. High 75°, low 60°.

Pressure30.00 inHg

Wind21.8 mph S

Humidity58%

Visibility—

Dew point57°

Fri, 2369° / 52°

0.13

69 °

Ottawa, Friday, 23 October

Light rain. High 69°, low 52°.

Pressure30.03 inHg

Wind27.4 mph S

Humidity56%

Visibility—

Dew point45°

Sat, 2459° / 48°

59 °

Ottawa, Saturday, 24 October

Overcast. High 59°, low 48°.

Pressure30.33 inHg

Wind12.2 mph NW

Humidity40%

Visibility—

Dew point33°

Sun, 2553° / 41°

53 °

Ottawa, Sunday, 25 October

Overcast. High 53°, low 41°.

Pressure30.30 inHg

Wind8.3 mph NW

Humidity45%

Visibility—

Dew point31°

Mon, 2656° / 43°

0.01

56 °

Ottawa, Monday, 26 October

Light rain. High 56°, low 43°.

Pressure30.06 inHg

Wind8.5 mph W

Humidity53%

Visibility—

Dew point37°

Tue, 2759° / 44°

0.06

59 °

Ottawa, Tuesday, 27 October

Light rain. High 59°, low 44°.

Pressure29.62 inHg

Wind19.1 mph NW

Humidity60%

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.