Glamorgan Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Glamorgan, the United Kingdom in September.

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

What to Expect in Glamorgan in September

Glamorgan, the United Kingdom 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.

Temperatures

You can expect pleasant maximum daytime temperatures of around 18°C (64°F) and nighttime temperatures around 12°C (54°F) in Cardiff.

To explore the conditions in Glamorgan, the United Kingdom in more detail, check the map below.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Penarth with an average of 81 mm (3.2 in) to high rainfall in Llangennith with 114 mm (4.5 in).

Average sunshine

Sunshine is moderately available across various locations. In Cardiff, you can expect around 149 hours of sunlight in September, which gives a pleasant combination of sun and shade. For those who want maximum sunshine, our weather planner can point you toward the sunniest places on Earth.

Explore Glamorgan by month

Pick a month to see the average temperature, rainfall and sunshine in Glamorgan — and find the best time to visit. (based on Cardiff)

Best Places to Visit in Glamorgan in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Glamorgan.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Glamorgan

What is the weather like in September for some of the most popular destinations in Glamorgan, the United Kingdom?

Temperature range in Glamorgan (September)

Precipitation variation in Glamorgan (September)

Cardiff

In September Cardiff generally has pleasant temperatures with maximum daytime temperatures around 18°C (64°F), minimum nighttime temperatures around 12°C (54°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

August
September
October
Max temperature
20°C (68°F)
18°C (64°F)
15°C (59°F)
Min temperature
14°C (57°F)
12°C (54°F)
10°C (50°F)
Monthly sun hours
184 hours
149 hours
102 hours
Monthly rainfall
98 mm (3.9 in)
90 mm (3.5 in)
119 mm (4.7 in)
Monthly rainy days
15 days
16 days
18 days
Weather conditions

Merthyr Tydfil

In September Merthyr Tydfil generally has moderate temperatures with maximum daytime temperatures around 18°C (64°F), minimum nighttime temperatures around 10°C (50°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

August
September
October
Max temperature
20°C (68°F)
18°C (64°F)
14°C (57°F)
Min temperature
12°C (54°F)
10°C (50°F)
7°C (45°F)
Monthly sun hours
184 hours
149 hours
102 hours
Monthly rainfall
100 mm (3.9 in)
89 mm (3.5 in)
122 mm (4.8 in)
Monthly rainy days
16 days
17 days
19 days
Weather conditions

Bridgend

In September Bridgend generally has pleasant temperatures with maximum daytime temperatures around 18°C (64°F), minimum nighttime temperatures around 12°C (54°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

August
September
October
Max temperature
20°C (68°F)
18°C (64°F)
15°C (59°F)
Min temperature
14°C (57°F)
12°C (54°F)
9°C (48°F)
Monthly sun hours
184 hours
149 hours
102 hours
Monthly rainfall
100 mm (3.9 in)
92 mm (3.6 in)
125 mm (4.9 in)
Monthly rainy days
16 days
16 days
19 days
Weather conditions

The Mumbles

In September The Mumbles generally has pleasant temperatures with maximum daytime temperatures around 18°C (64°F), minimum nighttime temperatures around 13°C (55°F) and high monthly rainfall. So on average the conditions are tolerable that month.

August
September
October
Max temperature
20°C (68°F)
18°C (64°F)
15°C (59°F)
Min temperature
14°C (57°F)
13°C (55°F)
10°C (50°F)
Monthly sun hours
184 hours
149 hours
102 hours
Monthly rainfall
110 mm (4.3 in)
106 mm (4.2 in)
147 mm (5.8 in)
Monthly rainy days
16 days
16 days
19 days
Weather conditions

Barry

In September Barry generally has pleasant temperatures with maximum daytime temperatures around 19°C (66°F), minimum nighttime temperatures around 12°C (54°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

August
September
October
Max temperature
20°C (68°F)
19°C (66°F)
15°C (59°F)
Min temperature
14°C (57°F)
12°C (54°F)
10°C (50°F)
Monthly sun hours
184 hours
149 hours
102 hours
Monthly rainfall
96 mm (3.8 in)
87 mm (3.4 in)
116 mm (4.6 in)
Monthly rainy days
15 days
15 days
18 days
Weather conditions

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

Popular cities in September

Day & night temperatures, rainfall and average weather in Glamorgan in September.

City Weather Day temp Night temp Rainfall
Cardiff 18°C (64°F) 12°C (54°F) 90 mm (3.5 in)
Merthyr Tydfil 18°C (64°F) 10°C (50°F) 89 mm (3.5 in)
Bridgend 18°C (64°F) 12°C (54°F) 92 mm (3.6 in)
The Mumbles 18°C (64°F) 13°C (55°F) 106 mm (4.2 in)
Barry 19°C (66°F) 12°C (54°F) 87 mm (3.4 in)
Cowbridge 18°C (64°F) 12°C (54°F) 91 mm (3.6 in)

Glamorgan weather in September: frequently asked questions

What is the weather like in Glamorgan, the United Kingdom in September?

In September, Glamorgan, the United Kingdom generally has pleasant weather conditions. Cardiff sees daytime temperatures near 18°C (64°F), with nights cooling to roughly 12°C (54°F).

What is the average temperature in Glamorgan, the United Kingdom in September?

In Cardiff, the average daytime high in September is 18°C (64°F), while nighttime temperatures drop to around 12°C (54°F).

Does Glamorgan, the United Kingdom get a lot of rain in September?

Not particularly. Cardiff averages just 90 mm (3.5 in) of rain in September, making it a mostly dry month for Glamorgan, the United Kingdom.

Is September a Good Time to Visit Glamorgan, the United Kingdom?

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

On average, the best time to visit Glamorgan, the United Kingdom 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.

Weather and climate has detailed information for every country in the world. Are you going to the United Kingdom? Get detailed historical weather averages for many cities in the United Kingdom.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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