Snowdonia National Park Weather in September

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

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Betws-y-coed Dolgellau Blaenau-Ffestiniog Beddgelert

Planning a journey to Snowdonia National Park, the United Kingdom this September and curious over the weather conditions to await? Your essential details are found on this page, answering your query:

What to Expect in Snowdonia National Park in September

Snowdonia National Park, the United Kingdom is a region in the United Kingdom. September in Snowdonia National Park generally has mild temperatures, with precipitation levels ranging from moderate to high.

Temperatures

You can expect mild maximum daytime temperatures of around 17°C (63°F) and nighttime temperatures around 10°C (50°F) in Betws-y-coed.

To explore the conditions in Snowdonia National Park, the United Kingdom in more detail, check the map below.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Trefriw with an average of 92 mm (3.6 in) to high rainfall in Beddgelert with 120 mm (4.7 in).

Average sunshine

Most areas see decent amounts of sunshine this month. Betws-y-coed gets around 111 hours of sunlight, providing a pleasant balance of sun and clouds. If you'd prefer more guaranteed sunshine, our weather planner can show you sunnier spots around the world.

Explore Snowdonia National Park by month

Pick a month to see the average temperature, rainfall and sunshine in Snowdonia National Park - and find the best time to visit. (based on Betws-y-coed)

January8°C (46°F) February8°C (46°F) March10°C (50°F) April12°C (54°F) May15°C (59°F) June18°C (64°F) This monthJuly19°C (66°F) August19°C (66°F) September17°C (63°F) October14°C (57°F) November10°C (50°F) December8°C (46°F)
Best Time to Visit Snowdonia National Park →

Best Places to Visit in Snowdonia National Park in September

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

Conditions Temperatures Precipitation
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 Snowdonia National Park

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

Temperature range in Snowdonia National Park (September)

Precipitation variation in Snowdonia National Park (September)

Betws-y-coed

In September Betws-y-coed generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 10°C (50°F) and moderate monthly rainfall. So on average the conditions are good that month.

« August
September
October »
August
September
October
Max temperature
19°C (66°F)
17°C (63°F)
14°C (57°F)
Min temperature
12°C (54°F)
10°C (50°F)
7°C (45°F)
Monthly sun hours
145 hours
111 hours
83 hours
Monthly rainfall
100 mm (3.9 in)
95 mm (3.7 in)
111 mm (4.4 in)
Monthly rainy days
17 days
17 days
20 days
Weather conditions
good
good
mixed
Climate in Betws-y-coed →

Dolgellau

In September Dolgellau generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 10°C (50°F) and high monthly rainfall. So on average the conditions are mixed that month.

« August
September
October »
August
September
October
Max temperature
19°C (66°F)
17°C (63°F)
14°C (57°F)
Min temperature
12°C (54°F)
10°C (50°F)
8°C (46°F)
Monthly sun hours
145 hours
111 hours
83 hours
Monthly rainfall
105 mm (4.1 in)
103 mm (4.1 in)
128 mm (5 in)
Monthly rainy days
17 days
17 days
20 days
Weather conditions
good
mixed
mixed
Climate in Dolgellau →

Blaenau-Ffestiniog

In September Blaenau-Ffestiniog generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 10°C (50°F) and high monthly rainfall. So on average the conditions are mixed that month.

« August
September
October »
August
September
October
Max temperature
19°C (66°F)
17°C (63°F)
14°C (57°F)
Min temperature
11°C (52°F)
10°C (50°F)
7°C (45°F)
Monthly sun hours
145 hours
111 hours
83 hours
Monthly rainfall
114 mm (4.5 in)
109 mm (4.3 in)
132 mm (5.2 in)
Monthly rainy days
17 days
18 days
20 days
Weather conditions
good
mixed
mixed
Climate in Blaenau-Ffestiniog →

Beddgelert

In September Beddgelert generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 10°C (50°F) and high monthly rainfall. So on average the conditions are mixed that month.

« August
September
October »
August
September
October
Max temperature
19°C (66°F)
17°C (63°F)
14°C (57°F)
Min temperature
12°C (54°F)
10°C (50°F)
8°C (46°F)
Monthly sun hours
145 hours
111 hours
83 hours
Monthly rainfall
120 mm (4.7 in)
120 mm (4.7 in)
147 mm (5.8 in)
Monthly rainy days
17 days
17 days
20 days
Weather conditions
good
mixed
mixed
Climate in Beddgelert →

Dolwyddelan

In September Dolwyddelan generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 10°C (50°F) and high monthly rainfall. So on average the conditions are mixed that month.

« August
September
October »
August
September
October
Max temperature
19°C (66°F)
17°C (63°F)
14°C (57°F)
Min temperature
11°C (52°F)
10°C (50°F)
7°C (45°F)
Monthly sun hours
145 hours
111 hours
83 hours
Monthly rainfall
108 mm (4.3 in)
102 mm (4 in)
121 mm (4.8 in)
Monthly rainy days
17 days
18 days
20 days
Weather conditions
good
mixed
mixed
Climate in Dolwyddelan →

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

Popular cities in September

Day & night temperatures, rainfall and average weather in Snowdonia National Park in September.

City Weather Day temp Night temp Rainfall
Betws-y-coed 17°C (63°F) 10°C (50°F) 95 mm (3.7 in)
Dolgellau 17°C (63°F) 10°C (50°F) 103 mm (4.1 in)
Blaenau-Ffestiniog 17°C (63°F) 10°C (50°F) 109 mm (4.3 in)
Beddgelert 17°C (63°F) 10°C (50°F) 120 mm (4.7 in)
Dolwyddelan 17°C (63°F) 10°C (50°F) 102 mm (4 in)
Llanberis 17°C (63°F) 11°C (52°F) 108 mm (4.3 in)

Snowdonia National Park weather in September: frequently asked questions

What is the weather like in Snowdonia National Park, the United Kingdom in September?

September in Snowdonia National Park, the United Kingdom brings good weather. In Betws-y-coed, daytime temperatures are typically around 17°C (63°F) and nighttime lows hover near 10°C (50°F).

What is the average temperature in Snowdonia National Park, the United Kingdom in September?

Average temperatures in Snowdonia National Park, the United Kingdom during September range from a nighttime low near 10°C (50°F) to a daytime high around 17°C (63°F) in Betws-y-coed.

Does Snowdonia National Park, the United Kingdom get a lot of rain in September?

Not particularly. Betws-y-coed averages just 95 mm (3.7 in) of rain in September, making it a mostly dry month for Snowdonia National Park, the United Kingdom.

Is September a Good Time to Visit Snowdonia National Park, the United Kingdom?

Given the typically good weather conditions in Betws-y-coed, September might be a good time to visit Snowdonia National Park, the United Kingdom. However, the weather conditions may vary depending on your destination.

On average, the best time to visit Snowdonia National Park, the United Kingdom is in June and July with generally very good weather in Betws-y-coed. On the other hand, the months of January, February, March, November and December tend to have less favorable weather conditions.

Interested in more climate information?

We have much more information about the climate in Snowdonia National Park.

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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