Porthmadog Weather in September

September in Porthmadog brings moderate temperatures around 17°C (63°F) during the day, dropping to 11°C (52°F) at night, with quite a bit of rainfall expected, averaging around 122 mm (4.8 in) for the month.

Rainfall in Porthmadog in September

Analyzing past climate data, one can expect approximately 17 days of rain, averaging 122 mm (4.8 in). Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.

Temperature in Porthmadog in September

September in Porthmadog sees highs of 17°C (63°F) and lows of 11°C (52°F) overnight. During September, the summer season is in full swing. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With lows of 11°C (52°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Porthmadog in September

You can expect a moderate amount of sunlight, with approximately 111 hours. This means a pleasant mix of sun and overcast.

If you prefer enjoying temperate temperatures and rain-free days, May, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.