ClimateAverages

Bellevue Weather in September

JanFebMarAprMayJunJulAugSepOctNovDec
September daytime high
20.6°C
September overnight low
10.3°C
September average
15.3°C

In September, Bellevue typically sees daytime highs of 20.6°C and overnight lows around 10.3°C. Compared to the annual average high of 15.1°C, September runs +5.6°C.

vs. annual avg high
+5.6°C
Rank among 12 months
#3 warmest
Hottest year overall
2014

Where September ranks in Bellevue

JanFebMarAprMayJunJulAugSep21°OctNovDec

FAQ

What is the average temperature in Bellevue in September?

September in Bellevue averages a daytime high of 20.6°C and an overnight low of 10.3°C.

Is September warm or cold in Bellevue?

September runs +5.6°C compared to Bellevue's annual average high of 15.1°C, ranking #3 of 12 months by warmth.

What should I pack for Bellevue in September?

Plan for daytime highs near 20.6°C and cooler evenings around 10.3°C.

Other months for Bellevue

JanuaryFebruaryMarchAprilMayJuneJulyAugustOctoberNovemberDecember

September in nearby cities

SeattleVancouverSpokaneTacomaKentEverettRentonFederal WaySpokane ValleyYakimaKirklandBellingham