National Weather ServiceMarylandFrost AdvisoryArchive to October 1, 2026
Frost Advisories in Maryland
The National Weather Service issued 22 frost advisories for Maryland in 2025 and 15 a year on average in 2008-2025; in 2021-2025 it had the 21st most of any state. 2026 through September: 7, in line with the average of 7 for those months in 2008-2025. Frederick was covered most often (68 times since 2008).
How many frost advisories does Maryland get?
Every frost advisory that covered part of Maryland. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 7 |
| 2025 | 22 |
| 2024 | 21 |
| 2023 | 17 |
| 2022 | 16 |
| 2021 | 12 |
| 2020 | 25 |
| 2019 | 7 |
| 2018 | 11 |
| 2017 | 9 |
| 2016 | 22 |
| 2015 | 9 |
| 2014 | 14 |
| 2013 | 14 |
| 2012 | 15 |
| 2011 | 3 |
| 2010 | 16 |
| 2009 | 23 |
| 2008 | 14 |
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
When in the year does Maryland get them?
Sum of 2008-2025; the busiest month is labelled.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
Where in Maryland?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Frederick | 68 | 17 | May 3, 2026 |
| Northern Baltimore | 67 | 18 | May 3, 2026 |
| Carroll | 66 | 17 | May 3, 2026 |
| Washington | 62 | 15 | May 3, 2026 |
| Cecil | 55 | 13 | November 7, 2025 |
| Kent | 48 | 13 | November 7, 2025 |
| Northwest Harford | 46 | 18 | May 3, 2026 |
| Caroline | 45 | 12 | November 7, 2025 |
| Queen Anne's | 45 | 13 | November 7, 2025 |
| Central and Eastern Allegany | 44 | 10 | May 12, 2026 |
| Extreme Western Allegany | 44 | 8 | May 1, 2026 |
| Southern Baltimore | 44 | 9 | April 9, 2026 |
The NWS issues these products for counties or forecast zones; a zone can be part of a county or a mountain range.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
What is a frost advisory?
A frost advisory means frost is expected on clear, calm nights during the growing season, with temperatures a few degrees above freezing. An advisory is issued for a hazard less serious than a warning that can still cause inconvenience or danger if people are not careful. The national record · Every warning type in Maryland.