Weather on April 21
Waterbury, CT
55 Years of Data
About This Date
April 21st in Waterbury, CT typically brings mild spring weather, with average highs around 61°F and lows near 42°F. Over 55 years of records, the warmest April 21st was in 1976 (70°F average), while the coldest was 2026 (38°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 29% of April 21st dates historically, with the wettest April 21st recording 7.11" of rain. The last decade has been 4.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.0°F cooler on this date compared to 20-30 years ago.
Planning for April 21st in Waterbury, CT? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026coldest | 47° | 30° | 38° | — | — |
| 2025 | 56° | 42° | 49° | 0.08" | — |
| 2024 | 53° | 38° | 45° | — | — |
| 2023 | 62° | 45° | 53° | — | — |
| 2022 | 59° | 35° | 47° | — | — |
| 2021 | 62° | 39° | 51° | 1.09" | — |
| 2020 | 55° | 34° | 44° | — | — |
| 2019 | 66° | 47° | 56° | 2.31" | — |
| 2018 | 52° | 35° | 43° | — | — |
| 2017 | 65° | 47° | 56° | 1.73" | — |
| 2016 | 65° | 35° | 50° | — | — |
| 2015 | 54° | 46° | 50° | 4.37" | — |
| 2014 | 60° | 30° | 45° | — | — |
| 2013 | 55° | 36° | 45° | — | — |
| 2012 | 68° | 55° | 62° | — | — |
| 2011 | 57° | 40° | 48° | — | — |
| 2010 | 67° | 40° | 53° | — | — |
| 2009 | 55° | 49° | 52° | 2.49" | — |
| 2008 | 58° | 45° | 51° | — | — |
| 2007 | 78° | 32° | 55° | — | — |
| 2006 | 57° | 44° | 51° | — | — |
| 2005 | 68° | 45° | 56° | — | — |
| 2004 | 54° | 45° | 49° | — | — |
| 2003 | 57° | 35° | 46° | 0.03" | — |
| 2002 | 60° | 49° | 54° | — | — |
| 2001 | 68° | 48° | 58° | 0.2" | — |
| 2000 | 50° | 45° | 47° | 7.11" | — |
| 1998 | 56° | 38° | 47° | — | — |
| 1997 | 38° | 58° | 48° | — | — |
| 1996 | 80° | 51° | 66° | — | — |
| 1995 | 65° | 47° | 56° | 0.18" | — |
| 1994 | 58° | 32° | 45° | — | — |
| 1993 | 66° | 48° | 57° | — | — |
| 1992 | 67° | 60° | 63° | 0.08" | — |
| 1991 | 50° | 37° | 44° | 1.83" | — |
| 1990 | 59° | 48° | 54° | 1.63" | — |
| 1989 | 63° | 33° | 48° | — | — |
| 1988 | 54° | 35° | 44° | — | — |
| 1987 | 75° | 58° | 66° | — | — |
| 1986 | 56° | 47° | 51° | 1.37" | — |
| 1985 | 74° | 43° | 58° | — | — |
| 1984 | 54° | 44° | 49° | — | — |
| 1983 | 55° | 36° | 45° | 0.05" | — |
| 1982 | 64° | 51° | 58° | — | — |
| 1981 | 49° | 29° | 39° | — | — |
| 1980 | 71° | 45° | 58° | — | — |
| 1979 | 65° | 42° | 53° | — | — |
| 1978 | 57° | 42° | 50° | 0.13" | — |
| 1977 | 75° | 43° | 59° | — | — |
| 1976warmest | 82° | 57° | 70° | — | — |
| 1975 | 51° | 37° | 44° | — | — |
| 1974 | 72° | 33° | 52° | — | — |
| 1973 | 62° | 34° | 48° | — | — |
| 1972 | 56° | 34° | 45° | — | — |
| 1971 | 66° | 36° | 51° | — | — |
Waterbury, CT Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Waterbury, CT Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Waterbury, CT Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Waterbury, CT
Waterbury, CT has no months that meet our "pleasant" threshold — every season has tradeoffs.