Mercer County, NJ
An ordinary day in Mercer County, NJ: was cooler than 63 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 66.1°F averaged over Mercer County, NJ, the coldest 29 September day in the county average since 2023, 13th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 57.4°F averaged over Mercer County, NJ, the warmest 29 September night in the county average since 2025, 20th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: 0.05 in of precipitation averaged over Mercer County, NJ, the wettest 29 September in the county average since 2024, 28th wettest of 76 (county average from NOAA gridded data, 1951 to 2026).
The month
- September 2026 so far averaged 68.4°F in Mercer County, NJ, the warmest 1 to 29 September in the county average since 2021, 17th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- August 2026 averaged 75°F in Mercer County, NJ, the warmest August in the county average since 2022, 20th 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 | 66.1 | 57.4 |
| 2025 | 84.8 | 60.3 |
| 2024 | 69 | 60.5 |
| 2023 | 62.7 | 54 |
| 2022 | 70.1 | 47.8 |
| 2021 | 74 | 50.8 |
| 2020 | 82 | 64.1 |
| 2019 | 85.2 | 58.4 |
| 2018 | 68.2 | 51.1 |
| 2017 | 77.7 | 47.2 |
| 2016 | 71.2 | 51.6 |
| 2015 | 81.2 | 62.2 |
| 2014 | 84.1 | 55.1 |
| 2013 | 73.2 | 48 |
| 2012 | 76.9 | 57.1 |
| 2011 | 76.4 | 68.3 |
| 2010 | 76.9 | 58.8 |
| 2009 | 75.5 | 47.9 |
| 2008 | 72.8 | 62 |
| 2007 | 79.4 | 53.5 |
| 2006 | 74.9 | 52.6 |
| 2005 | 75.8 | 50.3 |
| 2004 | 74.6 | 61.6 |
| 2003 | 70.8 | 50.7 |
| 2002 | 74.5 | 49.9 |
| 2001 | 64.5 | 45.8 |
| 2000 | 67.9 | 39.2 |
| 1999 | 79.6 | 62.7 |
| 1998 | 78.5 | 44.2 |
| 1997 | 72.2 | 51.6 |
| 1996 | 77.4 | 55.4 |
| 1995 | 74.7 | 45.2 |
| 1994 | 73.9 | 49.4 |
| 1993 | 65.9 | 44.2 |
| 1992 | 68 | 52.9 |
| 1991 | 64.8 | 37.7 |
| 1990 | 76.7 | 51.6 |
| 1989 | 66.5 | 38.7 |
| 1988 | 77.7 | 46.6 |
| 1987 | 82.2 | 54 |
| 1986 | 68.2 | 58 |
| 1985 | 70.9 | 45.1 |
| 1984 | 53.5 | 44.3 |
| 1983 | 72.4 | 44.9 |
| 1982 | 74.8 | 54.2 |
| 1981 | 66.7 | 40.1 |
| 1980 | 74.3 | 46.1 |
| 1979 | 75.5 | 58 |
| 1978 | 69 | 37.3 |
| 1977 | 73.1 | 47.6 |
| 1976 | 68.3 | 39.9 |
| 1975 | 71.6 | 43.9 |
| 1974 | 74.9 | 60.9 |
| 1973 | 78.5 | 60.6 |
| 1972 | 68.1 | 58 |
| 1971 | 70.4 | 58.2 |
| 1970 | 64.1 | 41.5 |
| 1969 | 69.4 | 43.8 |
| 1968 | 74.7 | 44 |
| 1967 | 73.9 | 63.6 |
| 1966 | 58.9 | 53.3 |
| 1965 | 67 | 40.7 |
| 1964 | 56.4 | 49.1 |
| 1963 | 75.6 | 55.5 |
| 1962 | 64.3 | 47.1 |
| 1961 | 72.5 | 40.8 |
| 1960 | 70.5 | 58.5 |
| 1959 | 83.8 | 67.5 |
| 1958 | 66.7 | 38.2 |
| 1957 | 64.2 | 34.8 |
| 1956 | 62.3 | 51 |
| 1955 | 74.8 | 47.4 |
| 1954 | 81.1 | 55.1 |
| 1953 | 81 | 49.9 |
| 1952 | 78.2 | 46.7 |
| 1951 | 65.8 | 37 |
Nearby
Trenton, NJ 5.9 mi, the nearest city with its own station