Frost dates in Montgomery County, Maryland
The average last spring frost in Montgomery County falls Mar 29 to Apr 14 and the average first fall frost Oct 26 to Nov 9, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 7a to 7b. Places: Ashton-Sandy Spring, Aspen Hill, Barnesville, Bethesda, Burtonsville, Cabin John. Pick a ZIP for 10% and 90% odds, soil temperature and the 7-day freeze forecast.
| ZIP | Place | Last spring frost | First fall frost | Zone |
|---|---|---|---|---|
| 20812 | Glen Echo | Apr 9 | Oct 31 | 7b |
| 20814 | Bethesda | Apr 9 | Oct 31 | 7b |
| 20815 | Chevy Chase | Apr 9 | Oct 31 | 7b |
| 20816 | Bethesda | Apr 9 | Oct 31 | 7b |
| 20817 | Bethesda | Apr 9 | Oct 31 | 7b |
| 20818 | Cabin John | Apr 9 | Oct 31 | 7b |
| 20832 | Olney | Apr 1 | Nov 6 | 7b |
| 20833 | Olney | Apr 1 | Nov 6 | 7b |
| 20837 | Poolesville | Apr 13 | Oct 26 | 7b |
| 20838 | Barnesville | Apr 14 | Oct 29 | 7a |
| 20839 | Apr 14 | Oct 29 | 7b | |
| 20841 | Ten Mile Creek | Apr 14 | Oct 29 | 7b |
| 20842 | Apr 14 | Oct 29 | 7b | |
| 20850 | Rockville | Apr 1 | Nov 6 | 7b |
| 20851 | Rockville | Apr 1 | Nov 6 | 7b |
| 20852 | North Bethesda | Apr 1 | Nov 6 | 7b |
| 20853 | Aspen Hill | Apr 1 | Nov 6 | 7b |
| 20854 | Potomac | Apr 1 | Nov 6 | 7b |
| 20855 | Redland | Apr 1 | Nov 6 | 7b |
| 20860 | Ashton-Sandy Spring | Apr 1 | Nov 6 | 7b |
| 20861 | Ashton-Sandy Spring | Apr 5 | Nov 9 | 7b |
| 20862 | Ashton-Sandy Spring | Apr 1 | Nov 6 | 7b |
| 20866 | Burtonsville | Apr 5 | Nov 9 | 7b |
| 20868 | Burtonsville | Apr 5 | Nov 9 | 7b |
| 20871 | Clarksburg | Apr 14 | Oct 29 | 7a |
| 20872 | Damascus | Apr 14 | Oct 29 | 7b |
| 20874 | Darnestown | Apr 1 | Nov 6 | 7b |
| 20876 | Germantown | Apr 14 | Oct 29 | 7b |
| 20877 | Gaithersburg | Apr 1 | Nov 6 | 7b |
| 20878 | Gaithersburg | Apr 1 | Nov 6 | 7b |
| 20879 | Flower Hill | Apr 1 | Nov 6 | 7b |
| 20880 | Washington Grove | Apr 1 | Nov 6 | 7b |
| 20882 | Damascus | Apr 14 | Oct 29 | 7b |
| 20886 | Montgomery Village | Apr 14 | Oct 29 | 7b |
| 20889 | Bethesda | Apr 9 | Oct 31 | 7b |
| 20892 | Bethesda | Apr 9 | Oct 31 | 7b |
| 20894 | Bethesda | Apr 9 | Oct 31 | 7b |
| 20895 | South Kensington | Apr 1 | Nov 6 | 7b |
| 20896 | Garrett Park | Apr 1 | Nov 6 | 7b |
| 20899 | Gaithersburg | Apr 1 | Nov 6 | 7b |
| 20901 | Silver Spring | Apr 10 | Nov 1 | 7b |
| 20902 | Wheaton | Apr 10 | Nov 1 | 7b |
| 20903 | Hillandale | Apr 10 | Nov 1 | 7b |
| 20904 | Colesville | Apr 10 | Nov 1 | 7b |
| 20905 | Cloverly | Apr 5 | Nov 9 | 7b |
| 20906 | Aspen Hill | Apr 1 | Nov 6 | 7b |
| 20910 | Silver Spring | Apr 10 | Nov 1 | 7b |
| 20912 | Takoma Park | Mar 29 | Nov 8 | 7b |
Nearby counties
Howard County Prince George's County Frederick County Anne Arundel County Baltimore city Carroll County
All Maryland counties · Download Maryland frost dates (CSV)
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