Weather on May 9
Waterbury, CT
55 Years of Data
Avg High
66°F
Avg Low
45°F
Warmest
2000
78°F avg
Coldest
2020
43°F avg
About This Date
May 9th in Waterbury, CT typically brings mild spring weather, with average highs around 66°F and lows near 45°F. Over 52 years of records, the warmest May 9th was in 2000 (78°F average), while the coldest was 2020 (43°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 42% of May 9th dates historically, with the wettest May 9th recording 4.39" of rain. The last decade has been 3.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.3°F cooler on this date compared to 20-30 years ago.
Planning for May 9th in Waterbury, CT? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 63° | 53° | 58° | 1.96" | — |
| 2024 | 71° | 54° | 62° | — | — |
| 2023 | 66° | 44° | 55° | — | — |
| 2022 | 72° | 44° | 58° | — | — |
| 2021 | 63° | 44° | 53° | 1.35" | — |
| 2020coldest | 54° | 33° | 43° | 1.3" | — |
| 2019 | 71° | 44° | 58° | — | — |
| 2018 | 70° | 45° | 57° | — | — |
| 2017 | 55° | 39° | 47° | — | — |
| 2016 | 65° | 39° | 52° | 0.41" | — |
| 2015 | 81° | 54° | 67° | — | — |
| 2014 | 60° | 54° | 57° | 0.2" | — |
| 2013 | 68° | 53° | 61° | 0.56" | — |
| 2012 | 61° | 57° | 59° | 1.83" | — |
| 2011 | 73° | 53° | 63° | — | — |
| 2010 | 54° | 44° | 49° | — | — |
| 2009 | 70° | 56° | 63° | 0.51" | — |
| 2008 | 58° | 47° | 52° | 2.11" | — |
| 2007 | 74° | 50° | 62° | — | — |
| 2006 | 59° | 50° | 55° | 0.56" | — |
| 2005 | 66° | 47° | 56° | — | — |
| 2004 | 59° | 46° | 53° | 0.36" | — |
| 2003 | 63° | 48° | 55° | 0.03" | — |
| 2002 | 52° | 50° | 51° | 0.05" | — |
| 2001 | 79° | 38° | 58° | — | — |
| 2000warmest | 93° | 62° | 78° | — | — |
| 1996 | 61° | 43° | 52° | 0.05" | — |
| 1995 | 67° | 35° | 51° | — | — |
| 1994 | 72° | 42° | 57° | — | — |
| 1993 | 85° | 45° | 65° | — | — |
| 1992 | 68° | 50° | 59° | 1.14" | — |
| 1991 | 68° | 44° | 56° | — | — |
| 1990 | 74° | 46° | 60° | — | — |
| 1989 | 64° | 36° | 50° | — | — |
| 1988 | 64° | 35° | 50° | — | — |
| 1987 | 75° | 37° | 56° | — | — |
| 1986 | 60° | 40° | 50° | — | — |
| 1985 | 60° | 32° | 46° | — | — |
| 1984 | 62° | 51° | 57° | 0.2" | — |
| 1983 | 69° | 40° | 54° | 0.15" | — |
| 1982 | 67° | 49° | 58° | — | — |
| 1981 | 63° | 31° | 47° | — | — |
| 1980 | 61° | 43° | 52° | — | — |
| 1979 | 89° | 57° | 73° | — | — |
| 1978 | 60° | 49° | 54° | 4.39" | — |
| 1977 | 57° | 34° | 45° | 1.63" | — |
| 1976 | 65° | 31° | 48° | — | — |
| 1975 | 71° | 40° | 55° | — | — |
| 1974 | 63° | 37° | 50° | — | — |
| 1973 | 66° | 49° | 57° | 4.39" | — |
| 1972 | 52° | 42° | 47° | 1.75" | — |
| 1971 | 50° | 44° | 47° | 0.23" | — |
52 years of data from MT CARMEL