Old St Mellons Weather Forecast
- 16
- 30
Sunny day
- 14
- 26
Cloudy
- 12
- 19
Partly cloudy
- 14
- 19
Cloudy
- 15
- 18
Cloudy
- 14
- 18
Light rain
- 13
- 17
Light rain shower
Today 27 May Wales
Another dry and sunny day, although there is a small chance of the odd shower developing and perhaps a few thunderstorms later. Not as hot but still feeling very warm. Maximum temperature 30 °C.
Old St Mellons Temperature Statistics
May Temperature
St-athan (26km)
Lowest 15 May, 2026
4.7 °CAverage May
12.5 °CHighest 24 May, 2026
25.9 °C
Climate (2021–Present)
St-athan (26km)
Average Low 2021–2026
9 °CAverage 2021–2026
11.8 °CAverage High 2021–2026
14.7 °C