Troy, IL Weather - Forecast & Monthly Averages

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TEMPERATURE
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Weather Quick Facts

The highest monthly average temperature in Troy for July is 77.9 degrees
The lowest monthly average temperature in Troy for January is 31.8 degrees
The most monthly precipitation in Troy occurs in April with 10.2 inches
The air quality index in Troy is 28% worse than the national average
The pollution index in Troy is 122% worse than the national average

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Troy 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	23°F	42°F	32°F	5.6"
February	25°F	45°F	34°F	3.8"
March	37°F	59°F	47°F	7.1"
April	47°F	70°F	57°F	10.2"
May	56°F	77°F	66°F	8.9"
June	65°F	87°F	76°F	9.2"
July	68°F	89°F	78°F	8.0"
August	66°F	88°F	76°F	7.8"
September	58°F	82°F	69°F	8.4"
October	47°F	70°F	57°F	8.6"
November	36°F	57°F	46°F	6.9"
December	28°F	45°F	36°F	8.2"

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Troy 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	Troy	Illinois	National
Air quality index	54	41	42
Pollution index	6,055,640	3,148,694	2,726,193

Troy air quality

Measurement	Total
Days measured	365
Days with good air quality	134
Days with moderate air quality	221
Days w/ poor A.Q. for sensitive groups	8
Days with unhealthy air quality	2

Air quality details

Pollutant	Total
Arsenic	0.010%
Benzene	0.070%
Carbon Tetrachloride	0.040%
Lead	0.100%
Mercury	0.230%

Average monthly Troy temperature with heat index

Troy monthly precipitation with daily maximum

Troy monthly snow depth with daily maximum

Troy monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Holiday Shores, IL	3,080	54	8.0%
Bethalto, IL	9,258	54	8.0%
Grantfork, IL	475	54	8.0%
Marine, IL	994	54	8.0%
Roxana, IL	1,570	54	8.0%
Troy, IL	10,278	54	8.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Pella, IA	10,279	39	22.0%
Arden Hills, MN	10,276	46	8.0%
Gig Harbor, WA	10,280	18	64.0%
Bee Ridge, FL	10,283	38	24.0%
Mapleton, UT	10,270	46	8.0%
Troy, IL	10,278	54	8.0%

Source: The Troy, 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.