June is one of the warmer months of the year in Watertown, with average highs near 21.9°C and lows around 12.1°C (mean 17°C). It is about average for rainfall, averaging 99 mm of rainfall and 80% relative humidity across the period.
June is one of the warmer months of the year in Watertown. Across 45 years of records, the warmest June in Watertown was 2005 — when the month averaged 20.2°C — while the coldest was 1985 at 14°C. Typical June days reach 21.9°C with nights near 12.1°C. The long-term trend is warming, about 0.4°C per decade.
June is about average for rainfall in Watertown, averaging 99 mm of rainfall. The wettest June on record was 2015 with 188 mm, while the driest was 1995 at 28 mm.
Relative humidity in Watertown during June averages 80%. The most humid June was 1996 at 84%, and the least humid were 1988 and 2016 at 73%.
June receives about 5.8 kWh/m²/day of solar energy in Watertown. The sunniest June was 1995 at 6.6 kWh/m²/day, and the cloudiest was 1990 at 4.9.
Average wind speed in Watertown during June is 0.2 m/s. The windiest Junes were 2020, 2022 and 2024, among others at 0.3 m/s, while the calmest were 2021, 2023 and 2025, among others at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.9°C | 17.1°C | 17.2°C | 17.0°C | 18.1°C | +2.2°C |
| Avg High | 20.9°C | 22.1°C | 22.0°C | 21.8°C | 23.0°C | +2.1°C |
| Avg Low | 10.9°C | 12.1°C | 12.3°C | 12.2°C | 13.2°C | +2.3°C |
| Avg Rain | 95 mm | 85 mm | 91 mm | 126 mm | 96 mm | +1 mm |
June temperatures in Watertown have risen by about 2.3°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 1°C (1986) to a record high of 32.3°C (2023).
Rainfall in June is about average for rainfall, averaging 99 mm, with a wettest year of 188 mm.
One of the best times to visit Watertown
June is one of the best times to visit Watertown. Expect days averaging 21.9°C and nights around 12.1°C (mean 17°C) — warmer than Watertown's yearly average — with higher rainfall (99 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 | 23.0°C | 18.3°C | 13.5°C | 29.3°C | 5.9°C | 90 mm | 81% | 0.2 m/s | 5.9 |
| 2024 | 23.3°C | 18.5°C | 13.8°C | 29.5°C | 8.0°C | 179 mm | 80% | 0.3 m/s | 5.5 |
| 2023 | 22.0°C | 17.3°C | 12.6°C | 32.3°C | 4.6°C | 96 mm | 81% | 0.2 m/s | 5.2 |
| 2022 | 22.1°C | 17.2°C | 12.3°C | 29.3°C | 6.6°C | 86 mm | 76% | 0.3 m/s | 5.7 |
| 2021 | 24.2°C | 19.1°C | 14.0°C | 29.9°C | 7.4°C | 76 mm | 75% | 0.2 m/s | 6 |
| 2020 | 23.4°C | 18.2°C | 13.0°C | 29.7°C | 3.8°C | 49 mm | 76% | 0.3 m/s | 6.4 |
| 2019 | 21.2°C | 16.1°C | 11.0°C | 26.5°C | 5.4°C | 127 mm | 80% | 0.2 m/s | 5.9 |
| 2018 | 21.6°C | 16.7°C | 11.9°C | 28.4°C | 7.7°C | 71 mm | 79% | 0.2 m/s | 6.1 |
| 2017 | 21.5°C | 17.0°C | 12.5°C | 28.2°C | 5.7°C | 144 mm | 82% | 0.3 m/s | 5.4 |
| 2016 | 22.6°C | 17.1°C | 11.7°C | 28.3°C | 5.1°C | 80 mm | 73% | 0.3 m/s | 6.4 |
| 2015 🌧️ | 21.5°C | 16.5°C | 11.5°C | 25.3°C | 4.3°C | 188 mm | 81% | 0.2 m/s | 5.7 |
| 2014 | 22.5°C | 17.5°C | 12.6°C | 27.5°C | 7.3°C | 128 mm | 81% | 0.3 m/s | 5.9 |
| 2013 | 21.3°C | 16.8°C | 12.3°C | 27.2°C | 6.1°C | 163 mm | 82% | 0.2 m/s | 5.2 |
| 2012 | 22.5°C | 17.7°C | 12.8°C | 28.7°C | 7.5°C | 88 mm | 78% | 0.3 m/s | 6.1 |
| 2011 | 22.1°C | 17.4°C | 12.7°C | 26.1°C | 5.9°C | 92 mm | 82% | 0.2 m/s | 5.8 |
| 2010 | 21.5°C | 17.1°C | 12.7°C | 26.7°C | 7.1°C | 183 mm | 82% | 0.3 m/s | 5 |
| 2009 | 20.9°C | 16.2°C | 11.4°C | 26.0°C | 1.7°C | 74 mm | 81% | 0.2 m/s | 5.5 |
| 2008 | 22.5°C | 18.0°C | 13.5°C | 27.8°C | 8.7°C | 108 mm | 84% | 0.2 m/s | 5.7 |
| 2007 | 22.7°C | 17.5°C | 12.4°C | 28.4°C | 3.6°C | 58 mm | 78% | 0.2 m/s | 6.3 |
| 2006 | 21.7°C | 17.3°C | 12.8°C | 29.7°C | 5.8°C | 146 mm | 82% | 0.2 m/s | 5.1 |
| 2005 🔥 | 25.0°C | 20.2°C | 15.3°C | 31.7°C | 8.8°C | 71 mm | 79% | 0.2 m/s | 6 |
| 2004 | 20.8°C | 15.7°C | 10.6°C | 28.1°C | 5.4°C | 83 mm | 78% | 0.2 m/s | 6.5 |
| 2003 | 21.3°C | 16.2°C | 11.1°C | 27.3°C | 3.3°C | 68 mm | 80% | 0.2 m/s | 5.9 |
| 2002 | 21.8°C | 17.0°C | 12.1°C | 27.0°C | 3.4°C | 114 mm | 80% | 0.2 m/s | 5.5 |
| 2001 | 22.2°C | 17.2°C | 12.3°C | 29.0°C | 3.0°C | 87 mm | 79% | 0.2 m/s | 6 |
| 2000 | 20.8°C | 16.2°C | 11.6°C | 26.4°C | 6.2°C | 102 mm | 83% | 0.2 m/s | 5.2 |
| 1999 | 24.1°C | 18.7°C | 13.3°C | 30.7°C | 7.3°C | 65 mm | 75% | 0.3 m/s | 6 |
| 1998 | 21.5°C | 17.2°C | 13.0°C | 29.2°C | 5.0°C | 153 mm | 83% | 0.3 m/s | 5.1 |
| 1997 | 22.6°C | 17.6°C | 12.6°C | 27.4°C | 7.4°C | 68 mm | 80% | 0.2 m/s | 6.5 |
| 1996 | 21.9°C | 17.3°C | 12.6°C | 25.3°C | 3.3°C | 127 mm | 84% | 0.2 m/s | 5 |
| 1995 | 23.7°C | 18.0°C | 12.4°C | 28.3°C | 7.2°C | 28 mm | 74% | 0.2 m/s | 6.6 |
| 1994 | 22.6°C | 17.6°C | 12.5°C | 30.5°C | 4.8°C | 94 mm | 80% | 0.2 m/s | 5.7 |
| 1993 | 20.7°C | 15.7°C | 10.8°C | 26.5°C | 4.5°C | 99 mm | 80% | 0.3 m/s | 5.6 |
| 1992 | 20.1°C | 15.2°C | 10.3°C | 26.0°C | 4.5°C | 47 mm | 78% | 0.3 m/s | 5.9 |
| 1991 | 22.2°C | 16.9°C | 11.7°C | 27.2°C | 5.8°C | 47 mm | 78% | 0.3 m/s | 6.5 |
| 1990 | 21.2°C | 16.6°C | 12.0°C | 27.3°C | 2.7°C | 118 mm | 84% | 0.2 m/s | 4.9 |
| 1989 | 21.9°C | 17.2°C | 12.5°C | 27.6°C | 8.4°C | 111 mm | 83% | 0.2 m/s | 5.5 |
| 1988 | 20.2°C | 14.6°C | 9.0°C | 26.9°C | 2.8°C | 55 mm | 73% | 0.3 m/s | 6.4 |
| 1987 | 22.2°C | 17.4°C | 12.6°C | 27.7°C | 7.2°C | 114 mm | 79% | 0.3 m/s | 5.5 |
| 1986 | 19.8°C | 14.7°C | 9.5°C | 24.8°C | 1.0°C | 142 mm | 78% | 0.3 m/s | 5.9 |
| 1985 ❄️ | 18.7°C | 14.0°C | 9.4°C | 23.7°C | 5.9°C | 96 mm | 80% | 0.2 m/s | 5.2 |
| 1984 | 21.8°C | 16.6°C | 11.5°C | 27.9°C | 4.3°C | 67 mm | 80% | 0.2 m/s | 5.9 |
| 1983 | 22.3°C | 16.8°C | 11.4°C | 31.8°C | 2.9°C | 47 mm | 78% | 0.3 m/s | — |
| 1982 | 19.6°C | 14.9°C | 10.3°C | 25.0°C | 5.4°C | 128 mm | 80% | 0.2 m/s | — |
| 1981 | 22.0°C | 16.9°C | 11.7°C | 28.0°C | 5.9°C | 98 mm | 80% | 0.3 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 21.9°C with lows near 12.1°C (mean 17°C), based on 45 years of NASA POWER data.
June averages 99 mm of rainfall in Watertown, about average for rainfall. The wettest on record was 188 mm in 2015.
The hottest June reached 32.3°C in 2023. The coldest dipped to 1°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 2.3°C. Daytime highs moved from 20.9°C to 22.9°C and overnight lows from 10.9°C to 13.2°C over the same span.
June is one of the warmer months of the year in Watertown and about average for rainfall, so plan for around 21.9°C daytime highs and 12.1°C at night.
Not quite — June is the 10th coolest month in Watertown, averaging 17°C.
For June in Watertown, pack light layers you can adjust through the day, with typical highs of 21.9°C and lows of 12.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 80% — quite humid.
Average wind speed in June is 0.2 m/s. The windiest June on record averaged 0.3 m/s (1981).
The wettest June on record was 2015 with 188 mm. On average, June sees 99 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 Watertown 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.
