Seneca, IL Weather - Forecast & Monthly Averages

TEMPERATURE	55
HUMIDITY	45
PRESSURE	102240
WIND COND.	130 13

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Weather Quick Facts

The highest monthly average temperature in Seneca for July is 73.1 degrees
The lowest monthly average temperature in Seneca for January is 24.8 degrees
The most monthly precipitation in Seneca occurs in July with 9 inches
The air quality index in Seneca is 100% better than the national average
The pollution index in Seneca is 36% better than the national average

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Seneca 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	33°F	25°F	3.9"
February	18°F	35°F	26°F	2.3"
March	31°F	50°F	39°F	4.3"
April	40°F	63°F	50°F	8.4"
May	51°F	74°F	62°F	6.0"
June	61°F	82°F	71°F	5.7"
July	63°F	84°F	73°F	9.0"
August	62°F	82°F	71°F	5.4"
September	54°F	77°F	65°F	3.7"
October	44°F	65°F	53°F	7.1"
November	33°F	51°F	41°F	4.0"
December	22°F	37°F	29°F	3.0"

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Seneca 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	Seneca	Illinois	National
Air quality index	0	41	42
Pollution index	1,736,930	3,148,694	2,726,193

Seneca air quality information

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

Seneca air quality information

Pollutant	Total
Arsenic	0.004%
Benzene	0.040%
Carbon Tetrachloride	0.000%
Lead	0.001%
Mercury	0.001%

Average monthly Seneca temperature with heat index

Seneca monthly precipitation with daily maximum

Seneca monthly snow depth with daily maximum

Seneca monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Dayton, IL	475	0	100.0%
Kinsman, IL	96	0	100.0%
Verona, IL	259	0	100.0%
Ottawa, IL	18,742	0	100.0%
Marseilles, IL	4,579	0	100.0%
Seneca, IL	2,534	0	100.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Drum Point, MD	2,534	41	18.0%
New Miami, OH	2,534	54	8.0%
Walnut Hill, TN	2,534	45	10.0%
Laurel Park, NC	2,533	44	12.0%
Carthage, TN	2,533	25	50.0%
Seneca, IL	2,534	0	100.0%

Source: The Seneca, 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.