June is one of the warmer months of the year in Conwy, with average highs near 15°C and lows around 11.6°C (mean 13.3°C). It is one of the drier months, averaging 67 mm of rainfall and 84% relative humidity across the period.
June is one of the warmer months of the year in Conwy. Across 45 years of records, the warmest June in Conwy was 2023 — when the month averaged 15.8°C — while the coldest was 1991 at 11.5°C. Typical June days reach 15°C with nights near 11.6°C. The long-term trend is warming, about 0.4°C per decade.
June is one of the drier months in Conwy, averaging 67 mm of rainfall. The wettest June on record was 2012 with 180 mm, while the driest was 2018 at 17 mm.
Relative humidity in Conwy during June averages 84%. The most humid Junes were 2005 and 2007 at 87%, and the least humid was 1989 at 81%.
June receives about 5.1 kWh/m²/day of solar energy in Conwy. The sunniest June was 2018 at 6.2 kWh/m²/day, and the cloudiest was 2012 at 4.1.
Average wind speed in Conwy during June is 4.2 m/s. The windiest June was 1981 at 5.3 m/s, while the calmest was 2010 at 3.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.6°C | 12.7°C | 13.5°C | 13.6°C | 14.3°C | +1.7°C |
| Avg High | 14.3°C | 14.3°C | 15.1°C | 15.3°C | 16.2°C | +1.9°C |
| Avg Low | 11.0°C | 11.1°C | 11.9°C | 11.9°C | 12.5°C | +1.5°C |
| Avg Rain | 62 mm | 66 mm | 66 mm | 79 mm | 62 mm | 0 mm |
June temperatures in Conwy have risen by about 1.8°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 6.9°C (1983) to a record high of 23.4°C (2018).
Rainfall in June is one of the drier months, averaging 67 mm, with a wettest year of 180 mm.
One of the best times to visit Conwy
June is one of the best times to visit Conwy. Expect days averaging 15°C and nights around 11.6°C (mean 13.3°C) — warmer than Conwy's yearly average — with moderate rainfall (67 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 | 16.7°C | 14.9°C | 13.1°C | 22.0°C | 10.3°C | 84 mm | 85% | 5 m/s | 5.2 |
| 2024 | 14.7°C | 13.3°C | 11.8°C | 20.5°C | 9.4°C | 44 mm | 83% | 4.6 m/s | 5.2 |
| 2023 🔥 | 18.2°C | 15.8°C | 13.3°C | 21.6°C | 9.8°C | 55 mm | 83% | 3.6 m/s | 6 |
| 2022 | 15.7°C | 13.9°C | 12.2°C | 20.4°C | 9.8°C | 44 mm | 82% | 4.2 m/s | 5.4 |
| 2021 | 15.8°C | 14.0°C | 12.2°C | 18.5°C | 10.3°C | 32 mm | 85% | 3.5 m/s | 5.3 |
| 2020 | 15.8°C | 14.0°C | 12.3°C | 22.0°C | 8.4°C | 114 mm | 85% | 4.5 m/s | 4.7 |
| 2019 | 15.1°C | 13.3°C | 11.6°C | 19.7°C | 9.5°C | 122 mm | 85% | 4.4 m/s | 4.8 |
| 2018 | 16.9°C | 14.9°C | 12.9°C | 23.4°C | 10.8°C | 17 mm | 82% | 3.5 m/s | 6.2 |
| 2017 | 15.9°C | 14.3°C | 12.8°C | 20.5°C | 11.1°C | 135 mm | 86% | 5.1 m/s | 4.6 |
| 2016 | 15.9°C | 14.3°C | 12.7°C | 20.3°C | 9.4°C | 99 mm | 86% | 3.3 m/s | 4.9 |
| 2015 | 14.7°C | 12.9°C | 11.0°C | 21.3°C | 8.0°C | 32 mm | 82% | 4.4 m/s | 5.5 |
| 2014 | 15.5°C | 14.0°C | 12.5°C | 17.5°C | 10.0°C | 34 mm | 84% | 3.4 m/s | 5.1 |
| 2013 | 14.6°C | 12.8°C | 11.0°C | 17.7°C | 8.8°C | 56 mm | 85% | 4 m/s | 5.2 |
| 2012 🌧️ | 14.2°C | 12.7°C | 11.2°C | 17.6°C | 8.1°C | 180 mm | 85% | 4.6 m/s | 4.1 |
| 2011 | 14.4°C | 12.8°C | 11.2°C | 19.3°C | 8.2°C | 71 mm | 84% | 4.3 m/s | 5.3 |
| 2010 | 15.5°C | 13.8°C | 12.2°C | 18.5°C | 10.6°C | 40 mm | 84% | 3.1 m/s | 5.8 |
| 2009 | 15.7°C | 13.7°C | 11.7°C | 20.9°C | 7.7°C | 54 mm | 83% | 3.6 m/s | 5.3 |
| 2008 | 14.4°C | 13.0°C | 11.6°C | 16.5°C | 9.7°C | 73 mm | 84% | 4.6 m/s | 5 |
| 2007 | 15.8°C | 14.1°C | 12.4°C | 20.7°C | 10.6°C | 122 mm | 87% | 3.9 m/s | 4.7 |
| 2006 | 15.7°C | 14.1°C | 12.4°C | 20.1°C | 9.7°C | 44 mm | 84% | 3.3 m/s | 5.3 |
| 2005 | 15.6°C | 13.9°C | 12.2°C | 21.4°C | 8.8°C | 54 mm | 87% | 3.9 m/s | 4.9 |
| 2004 | 15.0°C | 13.5°C | 12.1°C | 17.5°C | 10.0°C | 70 mm | 86% | 4.8 m/s | 4.9 |
| 2003 | 15.9°C | 14.1°C | 12.3°C | 19.3°C | 11.1°C | 71 mm | 84% | 4.1 m/s | 5.2 |
| 2002 | 14.4°C | 12.9°C | 11.4°C | 17.0°C | 9.5°C | 69 mm | 85% | 5.2 m/s | 4.7 |
| 2001 | 14.2°C | 12.7°C | 11.2°C | 20.1°C | 8.0°C | 39 mm | 85% | 4.3 m/s | 4.9 |
| 2000 | 14.8°C | 13.3°C | 11.7°C | 20.7°C | 9.8°C | 62 mm | 86% | 4.2 m/s | 4.6 |
| 1999 | 14.1°C | 12.6°C | 11.1°C | 18.2°C | 9.1°C | 79 mm | 84% | 4.1 m/s | 5.4 |
| 1998 | 14.5°C | 13.0°C | 11.5°C | 19.0°C | 9.0°C | 131 mm | 87% | 4.9 m/s | 4.3 |
| 1997 | 14.4°C | 12.7°C | 11.0°C | 17.6°C | 9.1°C | 101 mm | 84% | 4.8 m/s | 4.3 |
| 1996 | 14.2°C | 12.5°C | 10.7°C | 19.5°C | 8.1°C | 35 mm | 83% | 4.1 m/s | 5.3 |
| 1995 | 14.6°C | 12.8°C | 11.0°C | 22.6°C | 8.6°C | 26 mm | 84% | 4.4 m/s | 5.5 |
| 1994 | 13.8°C | 12.2°C | 10.7°C | 18.5°C | 8.6°C | 44 mm | 86% | 5 m/s | 5.1 |
| 1993 | 14.8°C | 13.2°C | 11.6°C | 20.3°C | 9.5°C | 70 mm | 86% | 3.4 m/s | 5.2 |
| 1992 | 15.8°C | 14.1°C | 12.3°C | 20.7°C | 9.9°C | 44 mm | 84% | 3.3 m/s | 5.4 |
| 1991 ❄️ | 13.0°C | 11.5°C | 10.0°C | 15.0°C | 7.0°C | 56 mm | 84% | 5.1 m/s | 4.8 |
| 1990 | 14.2°C | 12.7°C | 11.2°C | 16.4°C | 10.0°C | 71 mm | 84% | 4.3 m/s | 4.6 |
| 1989 | 14.7°C | 12.9°C | 11.1°C | 21.2°C | 7.4°C | 76 mm | 81% | 3.8 m/s | 5.2 |
| 1988 | 14.9°C | 13.3°C | 11.6°C | 17.8°C | 9.0°C | 21 mm | 84% | 3.3 m/s | 6 |
| 1987 | 13.0°C | 11.7°C | 10.5°C | 16.2°C | 8.0°C | 99 mm | 85% | 3.9 m/s | 4.3 |
| 1986 | 14.8°C | 12.7°C | 10.6°C | 21.5°C | 8.3°C | 51 mm | 84% | 4.4 m/s | 4.9 |
| 1985 | 13.3°C | 11.6°C | 9.9°C | 18.1°C | 7.3°C | 82 mm | 83% | 4.4 m/s | 5.1 |
| 1984 | 14.4°C | 12.8°C | 11.1°C | 17.9°C | 8.4°C | 44 mm | 85% | 3.9 m/s | 5 |
| 1983 | 14.4°C | 12.6°C | 10.7°C | 19.2°C | 6.9°C | 42 mm | 85% | 3.9 m/s | — |
| 1982 | 15.8°C | 13.8°C | 11.9°C | 21.5°C | 9.8°C | 76 mm | 84% | 3.6 m/s | — |
| 1981 | 13.6°C | 12.4°C | 11.2°C | 16.0°C | 9.6°C | 70 mm | 85% | 5.3 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 15°C with lows near 11.6°C (mean 13.3°C), based on 45 years of NASA POWER data.
June averages 67 mm of rainfall in Conwy, one of the drier months. The wettest on record was 180 mm in 2012.
The hottest June reached 23.4°C in 2018. The coldest dipped to 6.9°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 1.8°C. Daytime highs moved from 14.3°C to 16.2°C and overnight lows from 11°C to 12.5°C over the same span.
June is one of the warmer months of the year in Conwy and one of the drier months, so plan for around 15°C daytime highs and 11.6°C at night.
Not quite — June is the 9th coolest month in Conwy, averaging 13.3°C.
For June in Conwy, pack light layers you can adjust through the day, with typical highs of 15°C and lows of 11.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 84% — quite humid.
Average wind speed in June is 4.2 m/s. The windiest June on record averaged 5.3 m/s (1981).
The wettest June on record was 2012 with 180 mm. On average, June sees 67 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 Conwy 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.
