Ottawa, IL Weather - Forecast & Monthly Averages

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TEMPERATURE	67
HUMIDITY	64
PRESSURE	101290
WIND COND.	210 11.2

Weather Quick Facts

The highest monthly average temperature in Ottawa for July is 75.2 degrees
The lowest monthly average temperature in Ottawa for January is 25.7 degrees
The most monthly precipitation in Ottawa occurs in August with 8.2 inches
The air quality index in Ottawa is 100% better than the national average
The pollution index in Ottawa is 31% better than the national average

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Ottawa Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	18°F	34°F	26°F	3.3"
February	19°F	35°F	26°F	3.0"
March	32°F	51°F	40°F	4.3"
April	42°F	64°F	52°F	7.2"
May	53°F	75°F	63°F	8.0"
June	62°F	83°F	72°F	7.5"
July	66°F	85°F	75°F	7.1"
August	64°F	83°F	73°F	8.2"
September	56°F	78°F	66°F	6.3"
October	45°F	65°F	54°F	6.6"
November	34°F	51°F	42°F	4.3"
December	23°F	37°F	30°F	3.5"

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Ottawa air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
Index	Ottawa	Illinois	National
Air quality index	0	41	42
Pollution index	1,874,490	3,148,694	2,726,193

Ottawa air quality

Measurement	Total
Days measured	335
Days with good air quality	334
Days with moderate air quality	1
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.002%
Benzene	0.030%
Carbon Tetrachloride	0.010%
Lead	0.010%
Mercury	0.010%

Average monthly Ottawa temperature with heat index

Ottawa monthly precipitation with daily maximum

Ottawa monthly snow depth with daily maximum

Ottawa monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Troy Grove, IL	218	0	100.0%
LaSalle, IL	9,282	0	100.0%
Kinsman, IL	100	0	100.0%
Oglesby, IL	3,764	0	100.0%
Mendota, IL	7,151	0	100.0%
Ottawa, IL	19,177	0	100.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Winthrop Town, MA	19,172	43	14.0%
Creve Coeur, MO	19,159	54	8.0%
Altus, OK	19,157	43	14.0%
Brushy Creek, TX	19,202	44	12.0%
Twinsburg, OH	19,149	50	= 100
Ottawa, IL	19,177	0	100.0%

Source: The Ottawa, IL weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.