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Olney CDP, Maryland

Official LSAD Designation: Olney CDP • Census GEOID: 2458900 • Montgomery County

Climate Normals & Weather Observations

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

Reference Weather Station: ROCKVILLE 1 NE, MD US (ID: USC00187705) • Located 5.1 miles from community center • Elevation: 134.1 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 42.2° 26.9° 34.5° 3.11"
February 45.0° 28.4° 36.7° 2.60"
March 53.7° 35.9° 44.8° 3.66"
April 65.9° 45.6° 55.7° 3.23"
May 74.3° 54.9° 64.6° 3.55"
June 82.2° 63.6° 72.9° 3.96"
July 87.1° 68.8° 78.0° 3.98"
August 84.9° 67.0° 75.9° 3.05"
September 77.5° 60.0° 68.7° 4.01"
October 65.9° 48.0° 57.0° 3.52"
November 55.7° 38.2° 46.9° 3.27"
December 46.0° 30.9° 38.5° 3.38"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station LAUREL 3 W, MD US (ID: USC00185111) • 10.1 miles from community center .

This annual reference station differs from the monthly normals station (ID: USC00187705), which has no available annual mean history.

Annual mean Annual mean of daily highs Annual mean of daily lows
Annual temperature history at LAUREL 3 W, MD US Year is the horizontal axis. Annual mean temperature in degrees Fahrenheit is the vertical axis. Dots show recorded years; lines connect consecutive available years only. Missing years are gaps, with no interpolation. Optional dashed lines show annual mean of daily highs and lows. Exact values appear in the data table below. 44.0 50.8 57.5 64.3 71.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2012: Annual mean 59.3°F 2013: Annual mean 56.4°F 2014: Annual mean 55.3°F 2012: Annual mean of daily highs 68.5°F 2013: Annual mean of daily highs 65.2°F 2014: Annual mean of daily highs 64.2°F 2012: Annual mean of daily lows 50.0°F 2013: Annual mean of daily lows 47.7°F 2014: Annual mean of daily lows 46.3°F

Source: NOAA NCEI Global Summary of the Year.

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 59.3 68.5 50.0
2013 56.4 65.2 47.7
2014 55.3 64.2 46.3
2015 Unavailable Unavailable Unavailable
2016 Unavailable Unavailable Unavailable
2017 Unavailable Unavailable Unavailable
2018 Unavailable Unavailable Unavailable
2019 Unavailable Unavailable Unavailable
2020 Unavailable Unavailable Unavailable
2021 Unavailable Unavailable Unavailable
2022 Unavailable Unavailable Unavailable
2023 Unavailable Unavailable Unavailable
2024 Unavailable Unavailable Unavailable
2025 Unavailable Unavailable Unavailable
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.