Weather on May 21
Buffalo, NY
55 Years of Data
Avg High
69°F
Avg Low
50°F
Warmest
2024
76°F avg
Coldest
2008
43°F avg
About This Date
May 21st in Buffalo, NY typically brings mild spring weather, with average highs around 69°F and lows near 50°F. Over 55 years of records, the warmest May 21st was in 2024 (76°F average), while the coldest was 2008 (43°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 31% of May 21st dates historically, with the wettest May 21st recording 3.68" of rain. The last decade has been 8.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 8.9°F warmer on this date compared to 20-30 years ago.
Planning for May 21st in Buffalo, NY? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 54° | 48° | 51° | 1.12" | — |
| 2024warmest | 84° | 68° | 76° | — | — |
| 2023 | 64° | 48° | 56° | — | — |
| 2022 | 82° | 65° | 73° | 1.6" | — |
| 2021 | 84° | 65° | 74° | — | — |
| 2020 | 79° | 50° | 64° | — | — |
| 2019 | 63° | 42° | 52° | — | — |
| 2018 | 75° | 50° | 63° | — | — |
| 2017 | 73° | 54° | 63° | 0.74" | — |
| 2016 | 68° | 54° | 61° | — | — |
| 2015 | 61° | 47° | 54° | — | — |
| 2014 | 72° | 54° | 63° | 0.1" | — |
| 2013 | 85° | 65° | 75° | 0.05" | — |
| 2012 | 83° | 64° | 73° | — | — |
| 2011 | 71° | 50° | 61° | — | — |
| 2010 | 84° | 52° | 68° | — | — |
| 2009 | 78° | 56° | 67° | — | — |
| 2008coldest | 49° | 38° | 43° | 0.23" | — |
| 2007 | 64° | 41° | 53° | — | — |
| 2006 | 56° | 42° | 49° | 0.36" | — |
| 2005 | 67° | 43° | 55° | — | — |
| 2004 | 69° | 56° | 62° | — | — |
| 2003 | 58° | 43° | 50° | — | — |
| 2002 | 52° | 37° | 44° | — | — |
| 2001 | 64° | 57° | 61° | 3.68" | — |
| 2000 | 56° | 46° | 51° | — | — |
| 1999 | 73° | 45° | 59° | — | — |
| 1998 | 62° | 48° | 55° | — | — |
| 1997 | 56° | 40° | 48° | — | — |
| 1996 | 66° | 52° | 59° | 2.87" | — |
| 1995 | 67° | 52° | 59° | 0.46" | — |
| 1994 | 71° | 48° | 60° | — | — |
| 1993 | 63° | 42° | 52° | — | — |
| 1992 | 84° | 51° | 68° | — | — |
| 1991 | 79° | 55° | 67° | — | — |
| 1990 | 50° | 42° | 46° | 0.18" | — |
| 1989 | 65° | 52° | 58° | — | — |
| 1988 | 70° | 57° | 63° | — | — |
| 1987 | 83° | 55° | 69° | — | — |
| 1986 | 59° | 50° | 55° | 0.05" | — |
| 1985 | 65° | 49° | 57° | — | — |
| 1984 | 74° | 49° | 61° | — | — |
| 1983 | 72° | 51° | 61° | — | — |
| 1982 | 67° | 52° | 59° | — | — |
| 1981 | 67° | 50° | 58° | — | — |
| 1980 | 70° | 54° | 62° | — | — |
| 1979 | 65° | 48° | 56° | 0.3" | — |
| 1978 | 60° | 45° | 52° | 0.03" | — |
| 1977 | 90° | 60° | 75° | 0.13" | — |
| 1976 | 60° | 46° | 53° | — | — |
| 1975 | 83° | 64° | 73° | 1.65" | — |
| 1974 | 77° | 48° | 63° | — | — |
| 1973 | 63° | 48° | 55° | 1.02" | — |
| 1972 | 75° | 48° | 62° | — | — |
| 1971 | 67° | 41° | 54° | — | — |
55 years of data from GRAND ISLAND