Portland Weather Year-Round — Best Time to Visit
Portland, United States has cool weather year-round. The best time to visit is August (score: 83/100). Annual average high: 12.2°C, total rainfall: 1106mm.
When is the best time to visit Portland?
83
August is the best month to visit Portland with a travel score of 83/100 (Excellent).
Expect highs of 23.9°C, 9 rain days, and 10.9 hours of daily sunshine.
View August weather details →Travel Score by Month
43
Jan
48
Feb
53
Mar
63
Apr
72
May
78
Jun
82
Jul
83
Aug
79
Sep
66
Oct
57
Nov
46
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Portland each month?
12.2°C
Avg High
5.3°C
Avg Low
1106mm
Annual Rain
How much rain does Portland get?
Portland receives 1106mm of rain annually. The wettest month is typically October with 112mm, while February is the driest.
What is the weather like each month in Portland?
January
43
0°C
Low: -8°C
9 rain days
Mixed
February
48
1°C
Low: -7°C
8 rain days
Mixed
March
53
5°C
Low: -3°C
10 rain days
Mixed
April
63
10°C
Low: 3°C
10 rain days
Good
May
72
16°C
Low: 8°C
10 rain days
Good
June
78
21°C
Low: 14°C
10 rain days
Good
July
82
24°C
Low: 18°C
10 rain days
Excellent
August
Best time to visit83
24°C
Low: 17°C
9 rain days
Excellent
September
79
20°C
Low: 14°C
8 rain days
Good
October
66
14°C
Low: 8°C
9 rain days
Good
November
57
8°C
Low: 2°C
8 rain days
Mixed
December
46
3°C
Low: -3°C
10 rain days
Mixed
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Data based on 1994–2024 averages · Last updated: 2024-12-31