Weather on May 21
Edison, NJ
55 Years of Data
Avg High
72°F
Avg Low
51°F
Warmest
1996
82°F avg
Coldest
2005
46°F avg
About This Date
May 21st in Edison, NJ typically brings pleasant spring weather, with average highs around 72°F and lows near 51°F. Over 55 years of records, the warmest May 21st was in 1996 (82°F average), while the coldest was 2005 (46°F) — a 36°F range across recorded history. Rain or other precipitation has occurred on about 49% of May 21st dates historically, with the wettest May 21st recording 2.29" of rain. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for May 21st in Edison, NJ? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 69° | 53° | 61° | 0.05" | — |
| 2024 | 78° | 53° | 66° | — | — |
| 2023 | 67° | 52° | 59° | 2.29" | — |
| 2022 | 68° | 57° | 63° | 1.93" | — |
| 2021 | 78° | 47° | 62° | — | — |
| 2020 | 62° | 38° | 50° | — | — |
| 2019 | 87° | 57° | 72° | — | — |
| 2018 | 83° | 54° | 68° | — | — |
| 2017 | 62° | 43° | 52° | 0.28" | — |
| 2016 | 81° | 48° | 64° | — | — |
| 2015 | 65° | 47° | 56° | — | — |
| 2014 | 79° | 59° | 69° | — | — |
| 2013 | 79° | 59° | 69° | — | — |
| 2012 | 77° | 59° | 68° | 1.4" | — |
| 2011 | 67° | 51° | 59° | 0.76" | — |
| 2010 | 82° | 53° | 68° | — | — |
| 2009 | 83° | 47° | 65° | — | — |
| 2008 | 52° | 44° | 48° | 1.37" | — |
| 2007 | 77° | 51° | 64° | 0.08" | — |
| 2006 | 70° | 44° | 57° | — | — |
| 2005coldest | 53° | 40° | 46° | 1.09" | — |
| 2004 | 72° | 59° | 65° | — | — |
| 2003 | 79° | 53° | 66° | 0.46" | — |
| 2002 | 58° | 36° | 47° | — | — |
| 2001 | 60° | 52° | 56° | 0.03" | — |
| 2000 | 52° | 47° | 49° | 0.58" | — |
| 1999 | 74° | 42° | 58° | — | — |
| 1998 | 84° | 56° | 70° | — | — |
| 1997 | 73° | 43° | 58° | 0.18" | — |
| 1996warmest | 95° | 69° | 82° | — | — |
| 1995 | 77° | 45° | 61° | — | — |
| 1994 | 58° | 37° | 47° | — | — |
| 1993 | 58° | 43° | 50° | 0.15" | — |
| 1992 | 74° | 37° | 55° | — | — |
| 1991 | 73° | 42° | 58° | — | — |
| 1990 | 61° | 48° | 54° | 0.25" | — |
| 1989 | 85° | 55° | 70° | — | — |
| 1988 | 69° | 56° | 62° | 0.13" | — |
| 1987 | 56° | 51° | 53° | 0.41" | — |
| 1986 | 73° | 63° | 68° | 0.61" | — |
| 1985 | 83° | 58° | 70° | — | — |
| 1984 | 79° | 55° | 67° | 1.47" | — |
| 1983 | 74° | 61° | 67° | 0.28" | — |
| 1982 | 84° | 58° | 71° | 1.22" | — |
| 1981 | 73° | 40° | 56° | — | — |
| 1980 | 71° | 55° | 63° | 1.12" | — |
| 1979 | 70° | 53° | 61° | — | — |
| 1978 | 87° | 67° | 77° | — | — |
| 1977 | 83° | 59° | 71° | — | — |
| 1976 | 76° | 55° | 65° | 0.1" | — |
| 1975 | 87° | 62° | 75° | 0.05" | — |
| 1974 | 70° | 40° | 55° | — | — |
| 1973 | 64° | 53° | 59° | 0.61" | — |
| 1972 | 64° | 55° | 60° | 0.74" | — |
| 1971 | 61° | 50° | 55° | 0.1" | — |
55 years of data from NEW BRUNSWICK 3 SE