September 4 in Pen-y-groeslon, through the years

Typical high: 16.5°. Hottest: 21° (2023). Coldest night: 12.5° (2009).

YEARHIGHLOWRAIN
2025 16.9° 14.5° 2.9 mm
2024 14.7° 12.9° 0.9 mm
2023 21° 17° 0 mm
2022 18.9° 15.9° 10.1 mm
2021 17.6° 15.4° 0 mm
2020 16° 14.5° 0 mm
2019 16.4° 13.7° 2.8 mm
2018 15° 14.1° 0 mm
2017 16.2° 15.8° 0.7 mm
2016 16.2° 15.4° 3.4 mm
2015 14.4° 12.8° 0.3 mm
2014 17.5° 16.2° 0 mm
2013 16.5° 14° 0 mm
2012 16.5° 14.8° 1.4 mm
2011 15.1° 13.8° 3.5 mm
2010 17.4° 15.5° 1.3 mm
2009 15.7° 12.5° 0.1 mm
2008 14.5° 12.5° 5 mm
2007 15.5° 13.8° 0 mm
2006 17° 15.4° 2.2 mm
2005 19.6° 16.3° 2.5 mm
2004 16.6° 16.3° 1.9 mm
2003 16.8° 15.4° 0 mm
2002 16.9° 15.8° 0.4 mm
2001 15° 13.8° 1.7 mm
2000 16.1° 14.5° 0 mm
1999 17.6° 14.9° 0 mm
1998 16.1° 13° 13 mm
1997 15.7° 15° 0 mm
1996 16.8° 15.6° 0 mm
Source: ERA5 reanalysis (Copernicus C3S)

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