11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Overcast
12°
Feels like 12°
Wind↑ SE 4 km/h
Humidity 77 %
Evening
Partly cloudy
12°
Feels like 12°
Wind↑ NE 9 km/h
Gusts35 km/h
Humidity 70 %
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Mainly clear
12°
Feels like 12°
Wind↑ SE 6 km/h
Gusts24 km/h
Humidity 66 %
Evening
Rain showers
10°
Feels like 10°
Wind↑ ESE 6 km/h
Gusts15 km/h
Humidity 80 %
💧 0.7 mm
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Light rain
9°
Feels like 7°
Wind↑ S 13 km/h
Gusts28 km/h
Humidity 88 %
💧 2.5 mm
Evening
Drizzle
9°
Feels like 7°
Wind↑ S 19 km/h
Gusts36 km/h
Humidity 75 %
💧 0.2 mm
14-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Portland 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)
Portland climate: what a normal year looks like
From 15 h 41 min of daylight in late June to 8 h 42 min in late December.
Day and night differ most in August: 27 °C in the afternoon against 14 °C before dawn, a 13 °C swing.
The hottest stretch is August, when afternoons average 27 °C; the coldest is December, when nights average 2 °C.
A normal year brings roughly 1,400 mm of rain — more than 72% of the towns of 20,000+ people we compared it with.
Forecast highs for the coming week average 13 °C, 4 °C cooler than a normal October (17 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Jan
8 °C
2 °C
193 mm
Feb
10 °C
3 °C
148 mm
Mar
12 °C
4 °C
165 mm
Apr
15 °C
6 °C
133 mm
May
19 °C
9 °C
83 mm
Jun
22 °C
11 °C
55 mm
Jul
27 °C
13 °C
16 mm
Aug
28 °C
14 °C
19 mm
Sep
23 °C
12 °C
51 mm
Oct
17 °C
7 °C
126 mm
Nov
11 °C
5 °C
200 mm
Dec
7 °C
2 °C
218 mm
Whole year
17 °C
7 °C
1,400 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 45.52° N, 122.68° 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 Portland: pollution and pollen
1/6
Good
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.58µg/m³
PM109µg/m³
Copernicus CAMS model, updated several times a day.
Rain radar around Portland
Rain observed over the last two hours by official weather radars around Portland, followed by the radar forecast for the next hour where the weather service provides one.
Rain radarLast two hours, then forecast where available · drag the timeline
Moon over Portland
Waning gibbous
87 % illuminated · 18.3 days
Rise 22:13 Set 14:27
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 Portland
Curious about the weather in Portland on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Portland weather at a glance
This page gathers everything about the weather in Portland, Oregon: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “overcast”, it is 8 °C (feels like 8 °C) and the wind blows at 5 km/h.
Expected range today: 6 °C to 14 °C and a dry sky. 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 Portland 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.
