Bellevue Weather in September

September in Bellevue brings pleasant temperatures, with daytime highs of 22°C (72°F) and nights around 11°C (52°F). The excellent weather makes it a solid choice for a visit.

Rainfall in Bellevue in September

Historically, September sees about 10 days of rain, with a monthly average of 56 mm (2.2 in). Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Bellevue in September

Bellevue in September is worth a visit. The temperature is excellent, with 22°C (72°F) during the day and 11°C (52°F) at night. This month falls in the summer season. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With overnight lows of 11°C (52°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Bellevue in September

The month enjoys around 220 hours of sunshine, creating mostly sunny days with good weather conditions.

Wind Speed in Bellevue in September

Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July, August and September typically offer the best weather for Bellevue.