Loudoun County, VA
: September 2026 so far averaged 69.7°F in Loudoun County, VA, the warmest 1 to 29 September in the county average since 2019, tied 9th warmest of 76 (with 1980) (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- High
- 70.9°F
- Coldest since 2023
- 31st coldest of 76
- Low
- 58.7°F
- Warmest since 2025
- 18th warmest of 76
No measurable precipitation in the county average of Loudoun County, VA for 1 day to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
- Normal range, 67.6 to 79.1°F
Every year as a table
Every 29 September low of the county average in Loudoun County, VA since 1951: 58.7°F in 2026; the lowest is 35.9°F, in 1951.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 70.9 | 58.7 |
| 2025 | 81.6 | 60.4 |
| 2024 | 81.1 | 66.6 |
| 2023 | 69.2 | 50.3 |
| 2022 | 66.7 | 45.9 |
| 2021 | 77.4 | 55.8 |
| 2020 | 80.5 | 63.5 |
| 2019 | 86.7 | 63.8 |
| 2018 | 74.9 | 55 |
| 2017 | 77.9 | 48.9 |
| 2016 | 69.4 | 60.4 |
| 2015 | 78.1 | 64.3 |
| 2014 | 78.2 | 51.8 |
| 2013 | 67.7 | 45.8 |
| 2012 | 75 | 51.6 |
| 2011 | 78.8 | 61.7 |
| 2010 | 78.9 | 52.4 |
| 2009 | 75.7 | 49.3 |
| 2008 | 76 | 61.2 |
| 2007 | 78.1 | 52.1 |
| 2006 | 73.2 | 49.6 |
| 2005 | 78.2 | 45.7 |
| 2004 | 70.7 | 61.8 |
| 2003 | 72.6 | 48.1 |
| 2002 | 74.6 | 50.7 |
| 2001 | 62.8 | 44.1 |
| 2000 | 70.9 | 43.4 |
| 1999 | 71.3 | 63 |
| 1998 | 84 | 49.2 |
| 1997 | 66.3 | 56.2 |
| 1996 | 72.5 | 49.4 |
| 1995 | 75.7 | 49.1 |
| 1994 | 69.4 | 49.3 |
| 1993 | 68.1 | 44 |
| 1992 | 66.4 | 49.7 |
| 1991 | 69.5 | 40.4 |
| 1990 | 77.3 | 53.7 |
| 1989 | 67.3 | 41.6 |
| 1988 | 79.9 | 52.2 |
| 1987 | 82.2 | 53.9 |
| 1986 | 71.1 | 63.3 |
| 1985 | 71.3 | 42.6 |
| 1984 | 48.6 | 41.7 |
| 1983 | 73.4 | 45.8 |
| 1982 | 69.8 | 50.3 |
| 1981 | 68.2 | 39.6 |
| 1980 | 73.8 | 44 |
| 1979 | 67.9 | 59.9 |
| 1978 | 71.9 | 36.4 |
| 1977 | 71 | 46 |
| 1976 | 67.3 | 47.6 |
| 1975 | 70.7 | 44.7 |
| 1974 | 74.5 | 59.5 |
| 1973 | 81 | 61.9 |
| 1972 | 67.7 | 59.2 |
| 1971 | 75.4 | 57.8 |
| 1970 | 65 | 42 |
| 1969 | 69.8 | 42.6 |
| 1968 | 76.1 | 47.5 |
| 1967 | 72.6 | 58.4 |
| 1966 | 57.5 | 52.4 |
| 1965 | 68.9 | 45.2 |
| 1964 | 54.7 | 47.5 |
| 1963 | 79.4 | 55 |
| 1962 | 64.8 | 44.6 |
| 1961 | 72.8 | 39.3 |
| 1960 | 69.4 | 59.2 |
| 1959 | 83.2 | 67.1 |
| 1958 | 65.7 | 38.4 |
| 1957 | 57.9 | 38.5 |
| 1956 | 58.4 | 50.4 |
| 1955 | 74.8 | 51.2 |
| 1954 | 86.1 | 55.8 |
| 1953 | 83.2 | 46.9 |
| 1952 | 75.3 | 46.1 |
| 1951 | 64.5 | 35.9 |
The month
August 2026 averaged 76°F in Loudoun County, VA, the warmest August in the county average since 2021, tied 13th warmest of 132 (with 1959 and 1943) (county average from NOAA's monthly county data, 1895 to 2026).
The month in words
- Tuesday 29 September 2026: a high of 70.9°F averaged over Loudoun County, VA, the coldest 29 September day in the county average since 2023, tied 31st coldest of 76 (with 2000) (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 58.7°F averaged over Loudoun County, VA, the warmest 29 September night in the county average since 2025, 18th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Sterling-Dulles Airport, VA 14.4 mi, the nearest city with its own station