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Glamorgan weather in September

Thinking about venturing to Glamorgan this September and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What is the weather like in Glamorgan in September?

Glamorgan is a region in the United Kingdom. September in Glamorgan generally has pleasant temperatures, with precipitation levels ranging from moderate to high. During September, summer is in full swing.

You can expect pleasant maximum daytime temperatures of around 18°C and nighttime temperatures around 12°C in Cardiff.

In September, precipitation varies across different areas. From moderate rainfall in Penarth with an average of 81 mm to high rainfall in Llangennith with 114 mm. The city Cardiff usually sees around 149 hours of sunlight, indicating a moderately sunny period.

For specific regional insights in Glamorgan for September, refer to the map provided below. For an in-depth overview of the yearly weather conditions, do visit our Glamorgan climate page.

Where to go in Glamorgan in September

Find more information for the most popular destinations in the Glamorgan on the map below. Click on a destination dot for more detailes.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Popular destinations

What is the weather like in September for the 5 most popular destinations in Glamorgan?

Cardiff

In September Cardiff generally has pleasant temperatures with maximum daytime temperatures around 18°C, minimum nighttime temperatures around 12°C and moderate monthly rainfall. So on average the conditions are pleasant that month.

Cardiff
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
20°C 
14°C 
184 hours 
98 mm 
15 days 
18°C 
12°C 
149 hours 
90 mm 
16 days 
October   >> October
>>  
15°C 
10°C 
102 hours 
119 mm 
18 days 
Climate in Cardiff

Merthyr Tydfil

In September Merthyr Tydfil generally has moderate temperatures with maximum daytime temperatures around 18°C, minimum nighttime temperatures around 10°C and moderate monthly rainfall. So on average the conditions are pleasant that month.

Merthyr Tydfil
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
20°C 
12°C 
184 hours 
100 mm 
16 days 
18°C 
10°C 
149 hours 
89 mm 
17 days 
October   >> October
>>  
14°C 
7°C 
102 hours 
122 mm 
19 days 
Climate in Merthyr Tydfil

Bridgend

In September Bridgend generally has pleasant temperatures with maximum daytime temperatures around 18°C, minimum nighttime temperatures around 12°C and moderate monthly rainfall. So on average the conditions are pleasant that month.

Bridgend
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
20°C 
14°C 
184 hours 
100 mm 
16 days 
18°C 
12°C 
149 hours 
92 mm 
16 days 
October   >> October
>>  
15°C 
9°C 
102 hours 
125 mm 
19 days 
Climate in Bridgend

The Mumbles

In September The Mumbles generally has pleasant temperatures with maximum daytime temperatures around 18°C, minimum nighttime temperatures around 13°C and high monthly rainfall. So on average the conditions are tolerable that month.

The Mumbles
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
20°C 
14°C 
184 hours 
110 mm 
16 days 
18°C 
13°C 
149 hours 
106 mm 
16 days 
October   >> October
>>  
15°C 
10°C 
102 hours 
147 mm 
19 days 
Climate in The Mumbles

Porthcawl

In September Porthcawl generally has pleasant temperatures with maximum daytime temperatures around 18°C, minimum nighttime temperatures around 12°C and moderate monthly rainfall. So on average the conditions are pleasant that month.

Porthcawl
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
20°C 
14°C 
184 hours 
101 mm 
16 days 
18°C 
12°C 
149 hours 
96 mm 
16 days 
October   >> October
>>  
15°C 
10°C 
102 hours 
129 mm 
19 days 
Climate in Porthcawl

Is your destination not in the list? Have a look at other destinations in Glamorgan, in the United Kingdom.

Is September the best time to visit Glamorgan?

Given the typically pleasant weather conditions in Cardiff, September might be a good time to visit Glamorgan. However, the weather conditions may vary depending on your destination.

On average, the best time to visit Glamorgan is in July and August with generally perfect weather in Cardiff. The weather in January, February, November and December, on the other hand, tends to be poor.

Interested in more climate information?

We have much more information about the climate in Glamorgan. Interested in the weather conditions in a specific month? Select the month below.

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