Daytime highs, nighttime lows and the warmest cities in Wales, the United Kingdom this September.
Wales, the United Kingdom, a region in the United Kingdom, typically experiences pleasant weather in September, with maximum daytime temperatures around 18°C (64°F) and nighttime temperatures around 12°C (54°F) in Cardiff. September is a summer month.
Curious about the September temperatures in the prime spots of Wales? Navigate the map below and tap on a destination dot for more detailed stats.
Check the conditions for any month of the year.
Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Wales.
Marker color shows the average daytime high temperature in September: blue is cold, red is hot.
Average daytime highs in Wales, the United Kingdom during September reach about 18°C (64°F) in Cardiff.
Cardiff sees nighttime lows close to 12°C (54°F) in September.
Cardiff usually sees around 149 hours of sunlight, indicating a moderately sunny period.
The water temperature averages approximately 15°C (59°F) in Cardiff this month, generally too cold for comfortable swimming.
We have much more information about the climate in Wales.
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