TODAY JUN25
TEMPERATURE76
HUMIDITY79
PRESSURE29.89
WIND COND.270 9.2
  • 8559Mon
  • 8261Tue
  • 8672Wed
  • 9072Thu50%30%
  • 9173Fri
daynightWeather update from Georgetown - Delaware Coastal Airport at

Williston Average Weather

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January5°F68°F33°Fn/a
February9°F70°F38°Fn/a
March3°F77°F43°Fn/a
April28°F91°F55°Fn/a
May37°F90°F63°Fn/a
June50°F97°F73°Fn/a
July52°F97°F76°Fn/a
August52°F100°F74°Fn/a
September46°F95°F69°Fn/a
October30°F91°F59°Fn/a
November19°F73°F45°Fn/a
December14°F68°F38°Fn/a

Did you know?

  • The highest monthly average temperature in Williston for July is 76 degrees.
  • The lowest monthly average temperature in Williston for January is 33 degrees.
  • The most monthly precipitation in Williston occurs in January with 0 inches.
  • The air quality index in Williston is 27% better than the national average.
  • The pollution index in Williston is 73% better than the national average.

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Compare Williston, MD Weather To Other Cities

Williston 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.
IndexWillistonMarylandNational
Air quality index364350
Pollution index1,358,3706,283,4705,066,862

Williston air quality information

MeasurementTotal
Days measured365
Days with good air quality303
Days with moderate air quality61
Days w/ poor A.Q. for sensitive groups1
Days with unhealthy air quality

Williston air quality information

PollutantTotal
Arsenic0.000%
Benzene0.020%
Carbon Tetrachloride0.002%
Lead0.000%
Mercury0.000%

Average monthly Williston temperature with heat index

Williston monthly precipitation with daily maximum

Williston monthly snow depth with daily maximum

Williston monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Bridgeville, DE2,3973628%
Seaford, DE7,4173628%
Denton, MD4,3643628%
Queen Anne, MD9793628%
West Denton, MD1633628%
Williston, MD1083628%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Vale Summit, MD1083236%
Mitchell, OR1083530%
Dante, SD1084020%
Sasakwa, OK1083628%
White Mesa, UT1084216%
Williston, MD1083628%
Source: The Williston, 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.