St. John, IN Weather - Forecast & Monthly Averages

TEMPERATURE	34
HUMIDITY	90
PRESSURE	100370
WIND COND.	290 25.9

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Weather Quick Facts

The highest monthly average temperature in St. John for July is 74 degrees
The lowest monthly average temperature in St. John for January is 25.6 degrees
The most monthly precipitation in St. John occurs in July with 8 inches
The air quality index in St. John is 31% worse than the national average
The pollution index in St. John is 43% better than the national average

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St. John 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	4.5"
February	19°F	35°F	27°F	3.6"
March	31°F	49°F	39°F	4.4"
April	40°F	62°F	50°F	5.4"
May	50°F	72°F	60°F	6.5"
June	60°F	81°F	70°F	5.8"
July	64°F	84°F	74°F	8.0"
August	63°F	82°F	72°F	7.5"
September	56°F	76°F	65°F	5.4"
October	45°F	64°F	54°F	6.2"
November	33°F	51°F	42°F	5.4"
December	24°F	38°F	31°F	3.8"

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St. John 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	St. John	Indiana	National
Air quality index	55	56	42
Pollution index	1,558,070	2,719,453	2,726,193

St. John air quality

Measurement	Total
Days measured	365
Days with good air quality	121
Days with moderate air quality	227
Days w/ poor A.Q. for sensitive groups	16
Days with unhealthy air quality	1

Air quality details

Pollutant	Total
Arsenic	0.010%
Benzene	0.010%
Carbon Tetrachloride	0.070%
Lead	0.090%
Mercury	0.010%

Average monthly St. John temperature with heat index

St. John monthly precipitation with daily maximum

St. John monthly snow depth with daily maximum

St. John monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Merrillville, IN	34,871	37	26.0%
Hebron, IN	3,685	37	26.0%
New Chicago, IN	1,846	37	26.0%
Crown Point, IN	30,372	37	26.0%
Hobart, IN	28,120	37	26.0%
St. John, IN	18,382	55	10.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Rutherford, NJ	18,376	51	2.0%
Cameron Park, CA	18,370	52	4.0%
Hopkins, MN	18,400	46	8.0%
Laurel, MS	18,403	35	30.0%
White Oak, OH	18,351	54	8.0%
St. John, IN	18,382	55	10.0%

Source: The St. John, IN 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.