Bethesda, MD Weather - Forecast & Monthly Averages

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TEMPERATURE	59
HUMIDITY	48
PRESSURE	101862.57
WIND COND.

Weather Quick Facts

The highest monthly average temperature in Bethesda for July is 80.8 degrees
The lowest monthly average temperature in Bethesda for January is 37.1 degrees
The most monthly precipitation in Bethesda occurs in June with 5.3 inches
The air quality index in Bethesda is 12% worse than the national average
The pollution index in Bethesda is 439% worse than the national average

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Bethesda 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	28°F	47°F	37°F	2.7"
February	29°F	50°F	38°F	2.3"
March	37°F	60°F	47°F	3.2"
April	47°F	71°F	58°F	3.4"
May	56°F	78°F	67°F	4.6"
June	67°F	87°F	77°F	5.3"
July	72°F	91°F	81°F	4.2"
August	70°F	90°F	79°F	3.2"
September	63°F	83°F	72°F	3.5"
October	52°F	72°F	61°F	5.0"
November	40°F	61°F	50°F	2.5"
December	33°F	52°F	42°F	3.8"

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Bethesda 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	Bethesda	Maryland	National
Air quality index	47	43	42
Pollution index	14,693,900	5,342,367	2,726,193

Bethesda air quality

Measurement	Total
Days measured	365
Days with good air quality	209
Days with moderate air quality	145
Days w/ poor A.Q. for sensitive groups	10
Days with unhealthy air quality	1

Air quality details

Pollutant	Total
Arsenic	0.190%
Benzene	0.210%
Carbon Tetrachloride	0.060%
Lead	0.060%
Mercury	0.010%

Average monthly Bethesda temperature with heat index

Bethesda monthly precipitation with daily maximum

Bethesda monthly snow depth with daily maximum

Bethesda monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
North Laurel, MD	25,634	46	8.0%
Columbia, MD	107,798	46	8.0%
Bailey's Crossroads, VA	24,246	47	6.0%
Lincolnia, VA	23,261	47	6.0%
Rose Hill, VA	22,707	47	6.0%
Bethesda, MD	66,466	47	6.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Port Coquitlam, BC	66,485	n/a
Janesville, WI	66,492	38	24.0%
Port Charlotte, FL	66,383	36	28.0%
Lake Elsinore, CA	66,354	89	78.0%
Ankeny, IA	66,592	39	22.0%
Bethesda, MD	66,466	47	6.0%

Source: The Bethesda, MD 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.