Williston CDP, Maryland

Official LSAD Designation: Williston CDP • Census GEOID: 2485175 • Caroline County

Climate Normals & Weather Observations

30-year climate normals (1991–2020) and weather observations for Williston CDP.

Reference Weather Station: GREENWOOD 2NE, DE US (ID: USC00073595) • Located 14.9 miles from community center • Elevation: 13.7 m

Month	Average High (°F)	Average Low (°F)	Mean Temp (°F)	Precipitation (in)
January	43.6°	25.4°	34.5°	3.61"
February	45.7°	26.3°	36.0°	2.91"
March	53.9°	32.9°	43.4°	4.01"
April	64.7°	42.4°	53.5°	3.44"
May	73.3°	51.9°	62.6°	3.67"
June	82.1°	61.6°	71.9°	4.19"
July	86.7°	66.7°	76.7°	4.01"
August	85.0°	64.7°	74.9°	4.50"
September	78.9°	57.9°	68.4°	4.77"
October	68.2°	46.2°	57.2°	4.23"
November	57.3°	37.2°	47.2°	3.19"
December	48.2°	29.3°	38.8°	3.78"

2010–2025, completed calendar years only.

NOAA station ROYAL OAK 2 SSW, MD US (ID: USC00187806) • 19.9 miles from community center .

This annual reference station differs from the monthly normals station (ID: USC00073595), which has no available annual mean history.

Show annual mean of daily highs and lows

Annual mean Annual mean of daily highs Annual mean of daily lows

Annual temperature data table (°F)

Annual station temperatures, 2010–2025. Unavailable means no reported value.
Year	Annual mean (°F)	Annual mean of daily highs (°F)	Annual mean of daily lows (°F)
2010	Unavailable	Unavailable	Unavailable
2011	Unavailable	Unavailable	Unavailable
2012	59.8	69.1	50.6
2013	56.8	66.0	47.7
2014	55.9	65.5	46.3
2015	57.8	67.0	48.6
2016	59.2	67.8	50.5
2017	59.8	68.5	51.0
2018	58.6	67.4	49.9
2019	59.3	68.7	49.9
2020	Unavailable	Unavailable	Unavailable
2021	59.1	68.5	49.7
2022	58.0	67.9	48.0
2023	59.5	69.3	49.8
2024	60.3	69.0	51.6
2025	58.4	67.0	49.7

Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.