Bellingham Weather in September

Bellingham in September averages 17°C (63°F) during the day and 9°C (48°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Bellingham in September

You can expect rain on roughly 18 days based on historical data, averaging 69 mm (2.7 in) for the month. Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.

Temperature in Bellingham in September

In September, expect moderate temperatures in Bellingham, with highs of 17°C (63°F) and lows of 9°C (48°F) at night. Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights fall to 9°C (48°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in Bellingham in September

You can expect a moderate amount of sunlight, with approximately 136 hours. This means a pleasant mix of sun and overcast.

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