Weather in Bothell in September — Climate & Temperature

September

Weather in Bothell in September

Town

United States > Washington > Bothell > Bothell > September

Avg High

21°C

Avg Low

10°C

Rainfall

51 mm

Wind Speed

2.5 m/s

Sunshine

4.8 hrs/day

Humidity

71%

What to Expect

September offers mild conditions in Bothell, with pleasant highs around 20.7°C and comfortable lows near 10.1°C. At an average of 15.4°C, it is one of the more agreeable months to visit.

Expect moderate rainfall in September, with around 51mm of precipitation. While not the wettest month, there is a reasonable chance of rain, so carrying an umbrella is advisable.

Daylight hours are limited in September, with roughly 4.8 hours of sunshine per day. Indoor activities and cultural attractions may be preferable on cloudier days.

Humidity levels tend to be high during September, averaging around 71%, which can make temperatures feel warmer than they are.

Winds are generally calm in September, averaging 2.5 m/s, contributing to pleasant weather conditions.

Compared to Other Months

September is 4.6°C warmer than the annual average of 10.8°C in Bothell. Compared to August, temperatures in September are lower by approximately 2.8°C. Looking ahead to October, temperatures will be lower by about 4.5°C.

Temperature Comparison

What to Pack

Layer your clothing to adapt to varying temperatures. A light jacket, long trousers, and comfortable walking shoes are good choices. Bring a small umbrella just in case.

Frequently Asked Questions

Is September a good time to visit Bothell?

September offers mild and pleasant weather in Bothell, with average highs of 20.7°C. It is an excellent time for cultural visits and outdoor activities without the extreme heat or cold.

Does it rain a lot in Bothell in September?

Bothell receives a moderate amount of rain in September, around 51mm. While not the wettest month, it is wise to carry a compact umbrella when heading out.

How hot does it get in Bothell in September?

In September, Bothell sees average high temperatures of 20.7°C and lows of 10.1°C. The daily mean temperature is 15.4°C. These are 30-year climate normals, so actual day-to-day conditions may vary.

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