Weather on August 21
Waterbury, CT
55 Years of Data
About This Date
August 21st in Waterbury, CT typically brings warm summer weather, with average highs around 81°F and lows near 61°F. Over 51 years of records, the warmest August 21st was in 2009 (82°F average), while the coldest was 1977 (58°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 22% of August 21st dates historically, with the wettest August 21st recording 3.58" of rain. The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in Waterbury, CT? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 76° | 59° | 67° | 0.2" | — |
| 2024 | 76° | 55° | 65° | — | — |
| 2023 | 88° | 67° | 77° | — | — |
| 2022 | 84° | 66° | 75° | — | — |
| 2021 | 86° | 70° | 78° | 0.03" | — |
| 2020 | 80° | 57° | 69° | — | — |
| 2019 | 89° | 66° | 78° | — | — |
| 2018 | 76° | 61° | 68° | — | — |
| 2017 | 84° | 59° | 72° | — | — |
| 2016 | 83° | 72° | 77° | 3.58" | — |
| 2015 | 82° | 66° | 74° | 0.53" | — |
| 2014 | 78° | 66° | 72° | — | — |
| 2013 | 86° | 61° | 73° | — | — |
| 2012 | 82° | 67° | 74° | — | — |
| 2011 | 84° | 67° | 75° | 0.46" | — |
| 2010 | 77° | 61° | 69° | — | — |
| 2009warmest | 89° | 75° | 82° | 0.15" | — |
| 2008 | 78° | 56° | 67° | — | — |
| 2007 | 61° | 56° | 58° | 2.87" | — |
| 2006 | 81° | 62° | 71° | — | — |
| 2005 | 88° | 73° | 80° | — | — |
| 2004 | 78° | 62° | 70° | 2.92" | — |
| 2003 | 85° | 66° | 75° | — | — |
| 2002 | 80° | 61° | 70° | — | — |
| 2001 | 84° | 64° | 74° | — | — |
| 1999 | 61° | 57° | 59° | 0.2" | — |
| 1996 | 84° | 60° | 72° | — | — |
| 1995 | 93° | 49° | 71° | — | — |
| 1993 | 94° | 69° | 81° | — | — |
| 1992 | 77° | 47° | 62° | — | — |
| 1991 | 70° | 62° | 66° | 3.3" | — |
| 1990 | 72° | 56° | 64° | 0.03" | — |
| 1989 | 85° | 69° | 77° | — | — |
| 1988 | 81° | 53° | 67° | — | — |
| 1987 | 83° | 60° | 71° | — | — |
| 1986 | 76° | 64° | 70° | — | — |
| 1985 | 74° | 58° | 66° | — | — |
| 1984 | 78° | 50° | 64° | — | — |
| 1983 | 82° | 61° | 71° | — | — |
| 1982 | 76° | 60° | 68° | — | — |
| 1981 | 84° | 53° | 69° | — | — |
| 1980 | 73° | 62° | 68° | — | — |
| 1979 | 80° | 61° | 70° | — | — |
| 1978 | 81° | 60° | 70° | — | — |
| 1977coldest | 72° | 45° | 58° | — | — |
| 1976 | 90° | 59° | 74° | — | — |
| 1975 | 78° | 48° | 63° | — | — |
| 1974 | 84° | 59° | 72° | — | — |
| 1973 | 78° | 57° | 68° | — | — |
| 1972 | 81° | 52° | 66° | — | — |
| 1971 | 85° | 61° | 73° | — | — |
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.