August 20 in Merthyr, through the years

Typical high: 17.7°. Hottest: 21.8° (1997). Coldest night: 9.3° (2014).

YEARHIGHLOWRAIN
2025 18.6° 14.6° 0 mm
2024 16.7° 14.7° 1.4 mm
2023 18.8° 15.7° 1.5 mm
2022 19.8° 16° 0.8 mm
2021 18.3° 15.4° 2.2 mm
2020 19.2° 16° 9.1 mm
2019 16.8° 12.3° 0 mm
2018 18.6° 16.6° 0 mm
2017 16.1° 11.9° 9.9 mm
2016 16.9° 14.6° 23.3 mm
2015 18.2° 15.1° 3.2 mm
2014 14.7° 9.3° 1.3 mm
2013 18.6° 14.4° 0 mm
2012 18.4° 14.9° 1.5 mm
2011 16.9° 15.1° 2.9 mm
2010 18.9° 16.4° 9.2 mm
2009 18.3° 14.7° 7.4 mm
2008 16.2° 14.6° 4.4 mm
2007 15.7° 11° 24.4 mm
2006 17° 14.5° 0.4 mm
2005 17.8° 12.9° 0 mm
2004 15.6° 13.5° 5.9 mm
2003 18.1° 14.4° 0.2 mm
2002 17.9° 13.2° 0 mm
2001 17.5° 13.9° 0 mm
2000 16.9° 10.3° 0.6 mm
1999 18.3° 11.2° 0 mm
1998 16.7° 14.2° 2.1 mm
1997 21.8° 18.4° 4.4 mm
1996 18.9° 14.7° 7.5 mm
Source: ERA5 reanalysis (Copernicus C3S)

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