Oldcastle Weather Forecast
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Sunny day
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Sunny day
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Sunny day
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Sunny day
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Sunny day
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Sunny day
Today 7 Jul Wales
Monday will start fairly cloudy with some showers feeding southeastwards across the country. Most places will settle into a dry day though with increasingly sunny weather. Pleasantly warm, although breezy. Maximum Temperature 21C.
Oldcastle Temperature Statistics
July Temperature
St-athan (14km)
Lowest 3 July, 2025
10.6 °CAverage July
17.1 °CHighest 1 July, 2025
21 °C
Climate (2020–Present)
St-athan (14km)
Average Low 2020–2025
8.7 °CAverage 2020–2025
11.6 °CAverage High 2020–2025
14.4 °C