11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Drizzle
10°
Feels like 10°
Wind↑ SE 4 km/h
Humidity 83 %
💧 0.7 mm
Evening
Partly cloudy
9°
Feels like 9°
Wind↑ ENE 4 km/h
Humidity 81 %
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Drizzle
12°
Feels like 12°
Wind↑ E 3 km/h
Gusts26 km/h
Humidity 72 %
💧 0.4 mm
Evening
Rain showers
11°
Feels like 11°
Wind↑ SSW 15 km/h
Gusts47 km/h
Humidity 66 %
💧 3.6 mm
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Drizzle
9°
Feels like 9°
Wind↑ WSW 5 km/h
Gusts11 km/h
Humidity 84 %
💧 0.5 mm
Evening
Overcast
8°
Feels like 7°
Wind↑ SSE 7 km/h
Gusts30 km/h
Humidity 83 %
💧 0.1 mm
14-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Seattle forecast in charts · next 7 days
The week ahead: highs and lows
≈ A week close to the usual temperatures
Highs Lows Usual for the season (1991–2020 average)
Hourly detail
Temperature (°C) Rain (mm) Wind (km/h)
Seattle climate: what a normal year looks like
From 15 h 59 min of daylight in late June to 8 h 25 min in late December.
The hottest stretch is August, when afternoons average 23 °C; the coldest is December, when nights average 4 °C.
A normal year brings roughly 1,350 mm of rain — more than 70% of the towns of 20,000+ people we compared it with.
Even the coldest month, December, keeps nights above freezing on average (4 °C).
Forecast highs for the coming week average 12 °C, 3 °C cooler than a normal October (15 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Jan
7 °C
4 °C
177 mm
Feb
9 °C
4 °C
122 mm
Mar
11 °C
5 °C
140 mm
Apr
13 °C
7 °C
115 mm
May
17 °C
10 °C
80 mm
Jun
20 °C
12 °C
67 mm
Jul
23 °C
14 °C
33 mm
Aug
24 °C
14 °C
38 mm
Sep
20 °C
12 °C
69 mm
Oct
15 °C
8 °C
137 mm
Nov
10 °C
6 °C
194 mm
Dec
7 °C
4 °C
182 mm
Whole year
15 °C
8 °C
1,350 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 47.61° N, 122.33° W, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.
Air you breathe in Seattle: pollution and pollen
1/6
Good
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.54µg/m³
PM105µg/m³
Copernicus CAMS model, updated several times a day.
Rain radar around Seattle
Rain observed over the last two hours by official weather radars around Seattle, followed by the radar forecast for the next hour where the weather service provides one.
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Rain radarLast two hours, then forecast where available · drag the timeline
Moon over Seattle
Waning gibbous
87 % illuminated · 18.3 days
Rise 21:60 Set 14:38
Fri30/1079%
Sat31/1069%
Sun1/1159%
Mon2/1149%Last quarter
Tue3/1138%
Wed4/1128%
Thu5/1119%
Fri6/1112%
Sat7/116%
Sun8/112%
Mon9/110%
Tue10/111%New moon
Moonrise and moonset in local time (America/Los_Angeles); phase and lit fraction from a synodic calculation.
Look up a past day in Seattle
Curious about the weather in Seattle on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Seattle weather at a glance
This page gathers everything about the weather in Seattle, Washington: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “drizzle”, it is 6 °C (feels like 5 °C) and the wind blows at 9 km/h.
Expected range today: 6 °C to 12 °C and around 2 mm of rain. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms.
Use the Seattle forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.
