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Weather in Seattle in settembre

Climate normals based on 10 years of historical data for Seattle, Stati Uniti.

Average high
21°C
Average low
12°C
Rainfall
67 mm
10 rainy days
Sunshine
4.4h/day
Umidità
73%

How Hot Is Seattle in settembre?

September keeps Seattle warm but with noticeable cooling at night: 21°C peaks, 12°C lows.

Sunshine Hours in settembre

Seattle's September averages 4.4h of direct sun — cloud cover varies day to day.

Does It Rain In Seattle In settembre?

Rain comes in bursts: Seattle averages 67mm across 10 days in September.

Is Seattle Humid In settembre?

High levels of humidity in Seattle year-round (about 73%) will make it feel warmer than the thermometer suggests.

Wind In Seattle In settembre

Breezes around 13 kph in Seattle this September — comfortable for outdoor activity.

Cloud Cover In Seattle In settembre

Grey, cloudy days are the norm: 57% average cover in Seattle.

Cities With Similar Weather In settembre

Weather in Seattle, month by month

MonthHigh / LowPioggia
Meteo Gennaio 8°C / 3°C 188mm Details →
Meteo Febbraio 8°C / 2°C 124mm Details →
Meteo Marzo 11°C / 3°C 109mm Details →
Meteo Aprile 14°C / 5°C 87mm Details →
Meteo Maggio 19°C / 9°C 55mm Details →
Meteo Giugno 22°C / 11°C 54mm Details →
Meteo Luglio 26°C / 14°C 15mm Details →
Meteo Agosto 26°C / 15°C 27mm Details →
Meteo Settembre 21°C / 12°C 67mm
Meteo Ottobre 16°C / 8°C 134mm Details →
Meteo Novembre 10°C / 5°C 192mm Details →
Meteo Dicembre 7°C / 3°C 202mm Details →