St. Mary's County, MD
An ordinary day in St. Mary's County, MD: was cooler than 62 of 75 earlier years in the county average (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- Tuesday 29 September 2026: a high of 69.3°F averaged over St. Mary's County, MD, the coldest 29 September day in the county average since 2023, 14th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 60.4°F averaged over St. Mary's County, MD, the warmest 29 September night in the county average since 2025, tied 23rd warmest of 76 (with 2018) (county average from NOAA gridded data, 1951 to 2026).
- No measurable precipitation in the county average of St. Mary's County, MD for 1 day to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
The month
- September 2026 so far averaged 72.3°F in St. Mary's County, MD, the warmest 1 to 29 September in the county average since 2019, 11th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- August 2026 averaged 78.8°F in St. Mary's County, MD, the warmest August in the county average since 2018, 6th warmest of 132 (county average from NOAA's monthly county data, 1895 to 2026).
- Days of the month without a value
- 0
Every year on this date
- Above the normal range
- In it
- Below it
- Normal range
- This year and the extreme
Every year as a table
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 69.3 | 60.4 |
| 2025 | 79.4 | 63.5 |
| 2024 | 84.4 | 69.2 |
| 2023 | 68.7 | 56.5 |
| 2022 | 68 | 51.8 |
| 2021 | 79.9 | 60.1 |
| 2020 | 79.8 | 65.5 |
| 2019 | 83.4 | 67.8 |
| 2018 | 73.9 | 60.4 |
| 2017 | 79.7 | 55.2 |
| 2016 | 72.8 | 63.6 |
| 2015 | 80.7 | 67.5 |
| 2014 | 78.5 | 55.3 |
| 2013 | 71 | 53.4 |
| 2012 | 80.1 | 58.7 |
| 2011 | 80.1 | 65.9 |
| 2010 | 81.3 | 60.5 |
| 2009 | 80 | 54.8 |
| 2008 | 77 | 63.2 |
| 2007 | 81.8 | 57.5 |
| 2006 | 78.9 | 54.9 |
| 2005 | 78.6 | 52.8 |
| 2004 | 77.7 | 65.7 |
| 2003 | 74.2 | 53.7 |
| 2002 | 78.5 | 58.7 |
| 2001 | 63.7 | 48.5 |
| 2000 | 73.5 | 48.8 |
| 1999 | 74.3 | 65.9 |
| 1998 | 87 | 60.7 |
| 1997 | 71.4 | 61.8 |
| 1996 | 77 | 55.9 |
| 1995 | 76.5 | 54.2 |
| 1994 | 74.8 | 55.5 |
| 1993 | 69.4 | 46.8 |
| 1992 | 66.7 | 55.7 |
| 1991 | 68.3 | 46.1 |
| 1990 | 75.6 | 53.7 |
| 1989 | 67.7 | 46.3 |
| 1988 | 79.8 | 53.6 |
| 1987 | 81.7 | 55.5 |
| 1986 | 72.7 | 63.6 |
| 1985 | 71.1 | 48.2 |
| 1984 | 53.7 | 46.2 |
| 1983 | 72.9 | 53.8 |
| 1982 | 74.6 | 55 |
| 1981 | 73.9 | 46.6 |
| 1980 | 72.3 | 47.4 |
| 1979 | 75.8 | 63.5 |
| 1978 | 76.1 | 43.4 |
| 1977 | 74.4 | 53.5 |
| 1976 | 71.6 | 52.4 |
| 1975 | 71 | 49.8 |
| 1974 | 79.1 | 64.7 |
| 1973 | 84.4 | 65.2 |
| 1972 | 70.9 | 61.8 |
| 1971 | 77.8 | 57.9 |
| 1970 | 68.5 | 46.5 |
| 1969 | 71.8 | 50.7 |
| 1968 | 74.7 | 52 |
| 1967 | 79.2 | 65.9 |
| 1966 | 64.1 | 54.5 |
| 1965 | 69.5 | 50.2 |
| 1964 | 66.5 | 52.4 |
| 1963 | 78.4 | 56.4 |
| 1962 | 69.8 | 47 |
| 1961 | 77.4 | 50.2 |
| 1960 | 72.1 | 61.7 |
| 1959 | 81.6 | 67.6 |
| 1958 | 66.6 | 46.2 |
| 1957 | 59 | 46.6 |
| 1956 | 61.3 | 51.9 |
| 1955 | 77.6 | 58.8 |
| 1954 | 88.5 | 61.7 |
| 1953 | 80.1 | 53.3 |
| 1952 | 75.7 | 49 |
| 1951 | 70.1 | 46.6 |
Nearby
Washington, DC 50.9 mi, the nearest city with its own station