Places › Portland, OR › September
Portland in September
One of the best months — score 95 of 100
Typical September days in Portland reach about 77°F with nights near 54°F.
Avg high
77°F
1991–2020 normal
Avg low
54°F
1991–2020 normal
Rain total
1.52 in
in a typical September
Rain days
7
days with at least 0.01 in
Daylight
12h 28m
at mid-September, computed
What to pack for Portland in September
- A light jacket or fleece for evenings.
- Layers — afternoons run about 23° warmer than mornings.
- A compact rain layer — about 7 days see rain in a typical September.
Every packing line is triggered by a number on this page — the rules are on How we pick.
September vs. the alternatives
The whole year in Portland
JAN
48°F
Rain 19 days
Daylight 9h 04mFEB
52°F
Rain 16 days
Daylight 10h 18mMAR
57°F
Rain 18 days
Daylight 11h 46mAPR
62°F
Rain 17 days
Daylight 13h 27mMAY
69°F
Rain 13 days
Daylight 14h 52mJUN
74°F
★ Best
Rain 9 days
Daylight 15h 40mJUL
82°F
Rain 4 days
Daylight 15h 21mAUG
82°F
Rain 4 days
Daylight 14h 07mSEP
77°F
★ Best
Rain 7 days
Daylight 12h 28mOCT
64°F
Rain 14 days
Daylight 10h 51mNOV
54°F
Rain 18 days
Daylight 9h 26mDEC
47°F
Rain 19 days
Daylight 8h 43m
48°F
Rain 19 days
Daylight 9h 04mFEB
52°F
Rain 16 days
Daylight 10h 18mMAR
57°F
Rain 18 days
Daylight 11h 46mAPR
62°F
Rain 17 days
Daylight 13h 27mMAY
69°F
Rain 13 days
Daylight 14h 52mJUN
74°F
★ Best
Rain 9 days
Daylight 15h 40mJUL
82°F
Rain 4 days
Daylight 15h 21mAUG
82°F
Rain 4 days
Daylight 14h 07mSEP
77°F
★ Best
Rain 7 days
Daylight 12h 28mOCT
64°F
Rain 14 days
Daylight 10h 51mNOV
54°F
Rain 18 days
Daylight 9h 26mDEC
47°F
Rain 19 days
Daylight 8h 43m
Averages are the 1991–2020 climate normals (NOAA National Centers for Environmental Information) for the station named on each page. Rain days = days with at least 0.01 in of precipitation. Daylight is computed for the middle of the month.