Llanllyfni Weather in September

September in Llanllyfni brings moderate temperatures, with highs of 17°C (63°F) and nights dropping to 12°C (54°F). Rainfall is on the higher side this month, averaging around 127 mm (5 in), so keep a rain jacket handy.

Rainfall in Llanllyfni in September

Historically, approximately 17 days this month are expected to have rain, averaging 127 mm (5 in). Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in Llanllyfni in September

In September, expect moderate temperatures in Llanllyfni, with highs of 17°C (63°F) and lows of 12°C (54°F) at night. The month of September belongs to the summer season. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. At 12°C (54°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Llanllyfni in September

With about 111 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

If your ideal day consists of dry skies and pleasant temperatures, May, July and August typically offer the best circumstances for Llanllyfni.