June is one of the warmer months of the year in Waterbury, with average highs near 24.7°C and lows around 13.7°C (mean 19.2°C). It is about average for rainfall, averaging 104 mm of rainfall and 78% relative humidity across the period.
June is one of the warmer months of the year in Waterbury. Across 45 years of records, the warmest June in Waterbury was 1999 — when the month averaged 21°C — while the coldest was 1982 at 16.6°C. Typical June days reach 24.7°C with nights near 13.7°C. The long-term trend is warming, about 0.4°C per decade.
June is about average for rainfall in Waterbury, averaging 104 mm of rainfall. The wettest June on record was 1982 with 281 mm, while the driest were 1988 and 1999 at 26 mm.
Relative humidity in Waterbury during June averages 78%. The most humid June was 1989 at 85%, and the least humid was 1999 at 65%.
June receives about 5.9 kWh/m²/day of solar energy in Waterbury. The sunniest June was 1988 at 6.9 kWh/m²/day, and the cloudiest were 2003 and 2009 at 4.9.
Average wind speed in Waterbury during June is 0.1 m/s. The windiest Junes were 2023, 2024 and 2025, among others at 0.1 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 18.4°C | 19.1°C | 19.3°C | 19.4°C | 20.1°C | +1.7°C |
| Avg High | 23.9°C | 24.8°C | 24.6°C | 24.7°C | 25.7°C | +1.8°C |
| Avg Low | 12.9°C | 13.4°C | 14.0°C | 14.0°C | 14.6°C | +1.7°C |
| Avg Rain | 116 mm | 80 mm | 126 mm | 117 mm | 64 mm | -52 mm |
June temperatures in Waterbury have risen by about 1.9°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 2.3°C (2000) to a record high of 35.5°C (2021).
Rainfall in June is about average for rainfall, averaging 104 mm, with a wettest year of 281 mm.
One of the best times to visit Waterbury
June is one of the best times to visit Waterbury. Expect days averaging 24.7°C and nights around 13.7°C (mean 19.2°C) — warmer than Waterbury's yearly average — with higher rainfall (104 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 25.8°C | 20.6°C | 15.4°C | 35.0°C | 7.1°C | 45 mm | 79% | 0.1 m/s | 5.6 |
| 2024 | 26.3°C | 20.9°C | 15.4°C | 33.1°C | 10.3°C | 95 mm | 78% | 0.1 m/s | 6.4 |
| 2023 | 24.0°C | 18.7°C | 13.3°C | 33.1°C | 7.5°C | 58 mm | 78% | 0.1 m/s | 5.2 |
| 2022 | 25.0°C | 19.4°C | 13.7°C | 32.7°C | 8.9°C | 80 mm | 73% | 0.1 m/s | 6.2 |
| 2021 | 26.5°C | 20.8°C | 15.1°C | 35.5°C | 8.8°C | 48 mm | 77% | 0.1 m/s | 6.4 |
| 2020 | 26.4°C | 20.5°C | 14.6°C | 32.6°C | 5.0°C | 58 mm | 74% | 0.1 m/s | 6.6 |
| 2019 | 24.2°C | 19.1°C | 14.0°C | 32.7°C | 6.8°C | 110 mm | 80% | 0.1 m/s | 6 |
| 2018 | 24.4°C | 19.0°C | 13.6°C | 32.7°C | 8.7°C | 101 mm | 77% | 0.1 m/s | 6.1 |
| 2017 | 24.1°C | 19.0°C | 13.8°C | 30.6°C | 6.8°C | 92 mm | 78% | 0.1 m/s | 6 |
| 2016 | 26.0°C | 19.8°C | 13.6°C | 31.1°C | 8.6°C | 44 mm | 69% | 0.1 m/s | 6.8 |
| 2015 | 24.2°C | 19.0°C | 13.8°C | 31.3°C | 6.4°C | 144 mm | 79% | 0.1 m/s | 5.4 |
| 2014 | 24.9°C | 19.4°C | 14.0°C | 28.9°C | 7.5°C | 74 mm | 78% | 0.1 m/s | 6.4 |
| 2013 | 24.2°C | 19.6°C | 14.9°C | 29.4°C | 9.1°C | 258 mm | 82% | 0.1 m/s | 5.9 |
| 2012 | 24.9°C | 19.2°C | 13.4°C | 33.1°C | 8.3°C | 108 mm | 76% | 0.1 m/s | 6.1 |
| 2011 | 24.1°C | 19.1°C | 14.2°C | 29.3°C | 8.7°C | 166 mm | 82% | 0.1 m/s | 5.8 |
| 2010 | 26.1°C | 20.7°C | 15.2°C | 31.8°C | 8.3°C | 77 mm | 76% | 0.1 m/s | 5.9 |
| 2009 | 22.9°C | 18.2°C | 13.5°C | 26.2°C | 3.8°C | 185 mm | 83% | 0.1 m/s | 4.9 |
| 2008 | 25.5°C | 20.4°C | 15.3°C | 32.0°C | 10.6°C | 113 mm | 81% | 0.1 m/s | 6 |
| 2007 | 25.0°C | 19.3°C | 13.7°C | 32.7°C | 6.9°C | 88 mm | 77% | 0.1 m/s | 6.2 |
| 2006 | 23.6°C | 19.2°C | 14.8°C | 29.5°C | 8.2°C | 212 mm | 85% | 0.1 m/s | 5.1 |
| 2005 | 26.5°C | 20.9°C | 15.3°C | 33.7°C | 8.9°C | 73 mm | 79% | 0.1 m/s | 6 |
| 2004 | 24.1°C | 18.6°C | 13.1°C | 30.2°C | 8.0°C | 53 mm | 76% | 0.1 m/s | 6 |
| 2003 | 23.4°C | 18.3°C | 13.3°C | 34.8°C | 7.7°C | 161 mm | 84% | 0.1 m/s | 4.9 |
| 2002 | 25.3°C | 19.2°C | 13.1°C | 33.5°C | 6.7°C | 102 mm | 75% | 0.1 m/s | 6.2 |
| 2001 | 25.9°C | 20.2°C | 14.6°C | 31.7°C | 4.4°C | 133 mm | 76% | 0.1 m/s | 6.2 |
| 2000 | 24.0°C | 18.6°C | 13.3°C | 29.6°C | 2.3°C | 146 mm | 81% | 0.1 m/s | 5.3 |
| 1999 🔥 | 27.6°C | 21.0°C | 14.4°C | 34.0°C | 8.1°C | 26 mm | 65% | 0.1 m/s | 6.4 |
| 1998 | 22.7°C | 18.1°C | 13.4°C | 29.4°C | 6.3°C | 168 mm | 81% | 0.1 m/s | 5.4 |
| 1997 | 24.8°C | 18.7°C | 12.6°C | 31.1°C | 6.0°C | 50 mm | 74% | 0.1 m/s | 6.3 |
| 1996 | 23.9°C | 18.9°C | 13.9°C | 27.4°C | 6.5°C | 92 mm | 82% | 0.1 m/s | 5.4 |
| 1995 | 26.2°C | 19.9°C | 13.6°C | 34.3°C | 7.7°C | 40 mm | 70% | 0.1 m/s | 5.8 |
| 1994 | 25.2°C | 19.9°C | 14.6°C | 31.2°C | 6.6°C | 102 mm | 79% | 0.1 m/s | 5.7 |
| 1993 | 24.6°C | 18.8°C | 13.1°C | 29.6°C | 6.5°C | 52 mm | 74% | 0.1 m/s | 6.3 |
| 1992 | 23.2°C | 17.4°C | 11.6°C | 27.4°C | 6.9°C | 151 mm | 79% | 0.1 m/s | 6.3 |
| 1991 | 26.1°C | 20.0°C | 13.8°C | 34.2°C | 7.8°C | 45 mm | 71% | 0.1 m/s | 6.2 |
| 1990 | 23.8°C | 18.5°C | 13.2°C | 30.4°C | 6.2°C | 77 mm | 81% | 0.1 m/s | 5.7 |
| 1989 | 23.7°C | 19.0°C | 14.2°C | 29.1°C | 10.0°C | 162 mm | 85% | 0.1 m/s | 5.3 |
| 1988 | 24.6°C | 18.4°C | 12.2°C | 33.4°C | 6.6°C | 26 mm | 68% | 0.1 m/s | 6.9 |
| 1987 | 24.6°C | 19.3°C | 14.0°C | 29.5°C | 7.5°C | 72 mm | 80% | 0.1 m/s | 5.8 |
| 1986 | 23.3°C | 17.6°C | 11.9°C | 27.6°C | 4.4°C | 125 mm | 75% | 0.1 m/s | 6.3 |
| 1985 | 23.0°C | 17.3°C | 11.6°C | 27.2°C | 7.5°C | 110 mm | 73% | 0.1 m/s | 5.4 |
| 1984 | 24.2°C | 19.1°C | 13.9°C | 30.8°C | 5.3°C | 101 mm | 83% | 0.1 m/s | 5.8 |
| 1983 | 24.6°C | 18.9°C | 13.2°C | 31.5°C | 5.0°C | 85 mm | 79% | 0.1 m/s | — |
| 1982 ❄️ 🌧️ | 21.4°C | 16.6°C | 11.7°C | 26.5°C | 8.1°C | 281 mm | 83% | 0.1 m/s | — |
| 1981 | 25.4°C | 19.3°C | 13.2°C | 32.4°C | 6.9°C | 84 mm | 73% | 0.1 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 24.7°C with lows near 13.7°C (mean 19.2°C), based on 45 years of NASA POWER data.
June averages 104 mm of rainfall in Waterbury, about average for rainfall. The wettest on record was 281 mm in 1982.
The hottest June reached 35.5°C in 2021. The coldest dipped to 2.3°C in 2000.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 1.9°C. Daytime highs moved from 23.7°C to 25.5°C and overnight lows from 12.7°C to 14.6°C over the same span.
June is one of the warmer months of the year in Waterbury and about average for rainfall, so plan for around 24.7°C daytime highs and 13.7°C at night.
Not quite — June is the 10th coolest month in Waterbury, averaging 19.2°C.
For June in Waterbury, pack light layers you can adjust through the day, with typical highs of 24.7°C and lows of 13.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 78% — quite humid.
Average wind speed in June is 0.1 m/s. The windiest June on record averaged 0.1 m/s (1981).
The wettest June on record was 1982 with 281 mm. On average, June sees 104 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Waterbury behaves each June, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for June specifically, along with year-by-year records and how the month has changed over the decades.
