August 18 in Llanfechan, through the years

Typical high: 17.5°. Hottest: 25° (1996). Coldest night: 6.7° (2015).

YEARHIGHLOWRAIN
2025 19.1° 13.2° 0 mm
2024 16.7° 10.2° 0.1 mm
2023 17.9° 14.1° 7.9 mm
2022 17.7° 12.9° 0.6 mm
2021 15.1° 12.1° 0 mm
2020 19.9° 13.9° 6.8 mm
2019 16.3° 10.7° 1.1 mm
2018 17.7° 14.1° 0.4 mm
2017 14.2° 11.1° 10.4 mm
2016 20.8° 13.8° 2.5 mm
2015 17.7° 6.7° 0 mm
2014 14.3° 9.4° 1.6 mm
2013 16.9° 12° 1.2 mm
2012 20° 14.6° 0.3 mm
2011 14.7° 8.5° 3.1 mm
2010 16° 10.3° 6.6 mm
2009 18.5° 11.8° 0 mm
2008 16.5° 12.1° 7.1 mm
2007 15.3° 12.2° 7.2 mm
2006 16.4° 11.1° 8.9 mm
2005 20.3° 10.4° 0.5 mm
2004 18° 13.3° 9.8 mm
2003 16.4° 12.2° 0 mm
2002 17.8° 11.9° 7.7 mm
2001 16.3° 13° 5.6 mm
2000 14.5° 10.6° 8 mm
1999 16° 10.2° 5.1 mm
1998 16.9° 9.7° 0 mm
1997 23.2° 13.9° 0.5 mm
1996 25° 14.9° 0 mm
Source: ERA5 reanalysis (Copernicus C3S)

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