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Monthly weather forecast in Portland
30 days
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
30 days
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun
Sunday
Mon
Monday
Tue
Tuesday
Wed
Wednesday
Thu
Thursday
Fri
Friday
Sat
Saturday
11
+26
+19
11 August, sun
+26
+19
Feels like
+28
757 mmHg
67%
3.7
m/s
NW
11 August, Sunday. day, 26°; night, 19°; partly cloudy
12
+26
+19
12 August, mon
+26
+19
Feels like
+28
757 mmHg
62%
3.9
m/s
NW
12 August, Monday. day, 26°; night, 19°; clear
13
+26
+19
13 August, tue
+26
+19
Feels like
+27
757 mmHg
56%
4.5
m/s
N
13 August, Tuesday. day, 26°; night, 19°; clear
14
+27
+19
14 August, wed
+27
+19
Feels like
+28
758 mmHg
60%
4.5
m/s
N
14 August, Wednesday. day, 27°; night, 19°; clear
15
+30
+21
15 August, thu
+30
+21
Feels like
+31
758 mmHg
56%
4.5
m/s
N
15 August, Thursday. day, 30°; night, 21°; clear
16
+30
+20
16 August, fri
+30
+20
Feels like
+31
757 mmHg
51%
4.9
m/s
NW
16 August, Friday. day, 30°; night, 20°; clear
17
August
+28
+16
17 August, sat
+28
+16
Feels like
+19
749 mmHg
64%
5.3
m/s
SW
Climate normal
+28
+20
17 August, Saturday. day, 28°; night, 16°; thunderstorm with rain
18
+24
+13
18 August, sun
+24
+13
Feels like
+20
755 mmHg
65%
3.4
m/s
SW
Climate normal
+27
+18
18 August, Sunday. day, 24°; night, 13°; light rain
19
+24
+14
19 August, mon
+24
+14
Feels like
+19
757 mmHg
57%
3.7
m/s
SW
Climate normal
+26
+18
19 August, Monday. day, 24°; night, 14°; partly cloudy
20
+25
+14
20 August, tue
+25
+14
Feels like
+21
758 mmHg
63%
2.9
m/s
S
Climate normal
+26
+18
20 August, Tuesday. day, 25°; night, 14°; light rain
21
+24
+14
21 August, wed
+24
+14
Feels like
+20
755 mmHg
61%
2.9
m/s
W
Climate normal
+25
+17
21 August, Wednesday. day, 24°; night, 14°; light rain
22
+21
+13
22 August, thu
+21
+13
Feels like
+18
753 mmHg
67%
2.9
m/s
SW
Climate normal
+25
+18
22 August, Thursday. day, 21°; night, 13°; rain
23
+23
+15
23 August, fri
+23
+15
Feels like
+19
754 mmHg
68%
3.5
m/s
SW
Climate normal
+27
+18
23 August, Friday. day, 23°; night, 15°; light rain
24
+23
+15
24 August, sat
+23
+15
Feels like
+19
756 mmHg
71%
3.4
m/s
S
Climate normal
+27
+19
24 August, Saturday. day, 23°; night, 15°; light rain
25
+23
+14
25 August, sun
+23
+14
Feels like
+20
758 mmHg
77%
3
m/s
S
Climate normal
+27
+20
25 August, Sunday. day, 23°; night, 14°; mostly clear
26
+26
+14
26 August, mon
+26
+14
Feels like
+22
758 mmHg
65%
3
m/s
SW
Climate normal
+28
+20
26 August, Monday. day, 26°; night, 14°; mostly clear
27
+28
+14
27 August, tue
+28
+14
Feels like
+23
756 mmHg
63%
2.5
m/s
NW
Climate normal
+24
+18
27 August, Tuesday. day, 28°; night, 14°; partly cloudy
28
+29
+16
28 August, wed
+29
+16
Feels like
+24
754 mmHg
59%
2.9
m/s
W
Climate normal
+23
+17
28 August, Wednesday. day, 29°; night, 16°; partly cloudy
29
+28
+11
29 August, thu
+28
+11
Feels like
+21
747 mmHg
68%
2.8
m/s
SW
Climate normal
+24
+16
29 August, Thursday. day, 28°; night, 11°; partly cloudy
30
+27
+9
30 August, fri
+27
+9
Feels like
+18
718 mmHg
56%
4.6
m/s
NW
Climate normal
+22
+17
30 August, Friday. day, 27°; night, 9°; clear
31
+26
+9
31 August, sat
+26
+9
Feels like
+17
718 mmHg
53%
3.9
m/s
NW
Climate normal
+23
+17
31 August, Saturday. day, 26°; night, 9°; clear
1 September
+26
+10
1 September, sun
+26
+10
Feels like
+17
718 mmHg
56%
4.1
m/s
W
Climate normal
+24
+17
1 September, Sunday. day, 26°; night, 10°; clear
2
+21
+14
2 September, mon
+21
+14
Feels like
+16
719 mmHg
78%
3.1
m/s
W
Climate normal
+24
+18
2 September, Monday. day, 21°; night, 14°; partly cloudy
3
+15
+10
3 September, tue
+15
+10
Feels like
+13
720 mmHg
88%
2.6
m/s
W
Climate normal
+24
+18
3 September, Tuesday. day, 15°; night, 10°; light rain
4
+18
+8
4 September, wed
+18
+8
Feels like
+11
721 mmHg
63%
3.3
m/s
NW
Climate normal
+24
+17
4 September, Wednesday. day, 18°; night, 8°; partly cloudy
5
+21
+7
5 September, thu
+21
+7
Feels like
+13
720 mmHg
58%
3
m/s
NW
Climate normal
+24
+18
5 September, Thursday. day, 21°; night, 7°; mostly clear
6
+23
+8
6 September, fri
+23
+8
Feels like
+15
718 mmHg
62%
4
m/s
NW
Climate normal
+24
+18
6 September, Friday. day, 23°; night, 8°; clear
7
+19
+8
7 September, sat
+19
+8
Feels like
+10
718 mmHg
66%
4.6
m/s
W
Climate normal
+25
+19
7 September, Saturday. day, 19°; night, 8°; mostly clear
8
+17
+3
8 September, sun
+17
+3
Feels like
+9
721 mmHg
69%
3.3
m/s
NW
Climate normal
+25
+17
8 September, Sunday. day, 17°; night, 3°; mostly clear
9
+20
+6
9 September, mon
+20
+6
Feels like
+11
720 mmHg
54%
3.7
m/s
N
Climate normal
+26
+18
9 September, Monday. day, 20°; night, 6°; clear
10
+20
+4
10 September, tue
+20
+4
Feels like
+11
719 mmHg
53%
3.8
m/s
N
Climate normal
+29
+19
10 September, Tuesday. day, 20°; night, 4°; clear
11
+21
+5
11 September, wed
+21
+5
Feels like
+13
719 mmHg
57%
3.8
m/s
NW
Climate normal
+26
+17
11 September, Wednesday. day, 21°; night, 5°; clear
12
+21
+4
12 September, thu
+21
+4
Feels like
+13
719 mmHg
61%
3.2
m/s
NW
Climate normal
+24
+16
12 September, Thursday. day, 21°; night, 4°; mostly clear
13
+21
+8
13 September, fri
+21
+8
Feels like
+11
721 mmHg
58%
4.1
m/s
NW
Climate normal
+24
+18
13 September, Friday. day, 21°; night, 8°; mostly clear
14
+18
+9
14 September, sat
+18
+9
Feels like
+11
723 mmHg
47%
3.5
m/s
W
Climate normal
+24
+18
14 September, Saturday. day, 18°; night, 9°; partly cloudy
Average for 30 days
15
sunny days
8
days with precipitation
7
cloudy days
15 sunny days; 8 days with precipitation; 7 cloudy days;
62
%
air humidity
3.5
m/s
Wind
NW
14
mm of precipitation
(2% of annual average)
air humidity 62%; 14 millimeters of precipitation (2% of annual average); Wind north-westerly 3.5 Meters per second
Forecast in graphs
Temperature
Humidity, %
Wind, m/s
Pressure, mmHg
SW
SW
SW
S
W
SW
SW
S
S
SW
NW
W
SW
NW
NW
W
W
W
NW
NW
NW
W
NW
N
N
NW
NW
NW
W
NW
17
Average data for 10 years
18
19
20
21
22
23
24
25
26
27
28
29
30
31
1
September
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Daytime temperature
Night-time temperature
