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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
18
+27
+18
18 August, sun
+27
+18
Feels like
+28
756 mmHg
60%
4.5
m/s
NW
18 August, Sunday. day, 27°; night, 18°; clear
19
+26
+18
19 August, mon
+26
+18
Feels like
+26
756 mmHg
57%
4.5
m/s
N
19 August, Monday. day, 26°; night, 18°; clear
20
+26
+18
20 August, tue
+26
+18
Feels like
+27
756 mmHg
60%
4.5
m/s
NW
20 August, Tuesday. day, 26°; night, 18°; clear
21
+25
+17
21 August, wed
+25
+17
Feels like
+25
757 mmHg
62%
4.6
m/s
NW
21 August, Wednesday. day, 25°; night, 17°; clear
22
+25
+18
22 August, thu
+25
+18
Feels like
+26
758 mmHg
58%
4.3
m/s
N
22 August, Thursday. day, 25°; night, 18°; clear
23
+27
+18
23 August, fri
+27
+18
Feels like
+27
757 mmHg
51%
4.4
m/s
N
23 August, Friday. day, 27°; night, 18°; clear
24
August
+21
+12
24 August, sat
+21
+12
Feels like
+18
756 mmHg
68%
3
m/s
SW
Climate normal
+27
+19
24 August, Saturday. day, 21°; night, 12°; overcast
25
+24
+12
25 August, sun
+24
+12
Feels like
+20
760 mmHg
62%
2.9
m/s
N
Climate normal
+27
+20
25 August, Sunday. day, 24°; night, 12°; partly cloudy
26
+28
+15
26 August, mon
+28
+15
Feels like
+23
758 mmHg
58%
2.3
m/s
W
Climate normal
+28
+20
26 August, Monday. day, 28°; night, 15°; partly cloudy
27
+22
+10
27 August, tue
+22
+10
Feels like
+17
760 mmHg
57%
3.8
m/s
NW
Climate normal
+24
+18
27 August, Tuesday. day, 22°; night, 10°; light rain
28
+25
+12
28 August, wed
+25
+12
Feels like
+17
758 mmHg
53%
4.2
m/s
N
Climate normal
+23
+17
28 August, Wednesday. day, 25°; night, 12°; clear
29
+31
+13
29 August, thu
+31
+13
Feels like
+23
754 mmHg
42%
3.3
m/s
NE
Climate normal
+24
+16
29 August, Thursday. day, 31°; night, 13°; clear
30
+32
+15
30 August, fri
+32
+15
Feels like
+27
754 mmHg
46%
2.5
m/s
NW
Climate normal
+22
+17
30 August, Friday. day, 32°; night, 15°; clear
31
+33
+18
31 August, sat
+33
+18
Feels like
+27
754 mmHg
50%
2.8
m/s
W
Climate normal
+23
+17
31 August, Saturday. day, 33°; night, 18°; mostly clear
1 September
+33
+18
1 September, sun
+33
+18
Feels like
+27
753 mmHg
54%
3.2
m/s
NE
Climate normal
+24
+17
1 September, Sunday. day, 33°; night, 18°; mostly clear
2
+30
+17
2 September, mon
+30
+17
Feels like
+25
754 mmHg
58%
2.9
m/s
SW
Climate normal
+24
+18
2 September, Monday. day, 30°; night, 17°; partly cloudy
3
+29
+16
3 September, tue
+29
+16
Feels like
+26
755 mmHg
62%
2.8
m/s
NW
Climate normal
+24
+18
3 September, Tuesday. day, 29°; night, 16°; partly cloudy
4
+28
+16
4 September, wed
+28
+16
Feels like
+24
754 mmHg
63%
3.2
m/s
W
Climate normal
+24
+17
4 September, Wednesday. day, 28°; night, 16°; partly cloudy
5
+24
+11
5 September, thu
+24
+11
Feels like
+17
718 mmHg
64%
4.2
m/s
NW
Climate normal
+24
+18
5 September, Thursday. day, 24°; night, 11°; clear
6
+24
+10
6 September, fri
+24
+10
Feels like
+17
715 mmHg
67%
4.2
m/s
NW
Climate normal
+24
+18
6 September, Friday. day, 24°; night, 10°; partly cloudy
7
+26
+11
7 September, sat
+26
+11
Feels like
+19
715 mmHg
62%
4.5
m/s
NW
Climate normal
+25
+19
7 September, Saturday. day, 26°; night, 11°; clear
8
+27
+10
8 September, sun
+27
+10
Feels like
+20
717 mmHg
61%
4.3
m/s
NW
Climate normal
+25
+17
8 September, Sunday. day, 27°; night, 10°; mostly clear
9
+27
+9
9 September, mon
+27
+9
Feels like
+19
717 mmHg
63%
3.9
m/s
W
Climate normal
+26
+18
9 September, Monday. day, 27°; night, 9°; clear
10
+25
+9
10 September, tue
+25
+9
Feels like
+17
716 mmHg
61%
3.9
m/s
NW
Climate normal
+29
+19
10 September, Tuesday. day, 25°; night, 9°; mostly clear
11
+24
+12
11 September, wed
+24
+12
Feels like
+18
715 mmHg
60%
3.2
m/s
W
Climate normal
+26
+17
11 September, Wednesday. day, 24°; night, 12°; mostly clear
12
+21
+8
12 September, thu
+21
+8
Feels like
+14
718 mmHg
75%
3.6
m/s
NW
Climate normal
+24
+16
12 September, Thursday. day, 21°; night, 8°; partly cloudy
13
+24
+9
13 September, fri
+24
+9
Feels like
+16
718 mmHg
51%
3.9
m/s
NW
Climate normal
+24
+18
13 September, Friday. day, 24°; night, 9°; clear
14
+26
+8
14 September, sat
+26
+8
Feels like
+17
717 mmHg
53%
3.7
m/s
W
Climate normal
+24
+18
14 September, Saturday. day, 26°; night, 8°; mostly clear
15
+26
+13
15 September, sun
+26
+13
Feels like
+18
719 mmHg
58%
3.1
m/s
NW
Climate normal
+23
+17
15 September, Sunday. day, 26°; night, 13°; clear
16
+30
+14
16 September, mon
+30
+14
Feels like
+21
719 mmHg
58%
3.5
m/s
NW
Climate normal
+21
+17
16 September, Monday. day, 30°; night, 14°; clear
17
+27
+13
17 September, tue
+27
+13
Feels like
+20
721 mmHg
67%
3.7
m/s
W
Climate normal
+22
+17
17 September, Tuesday. day, 27°; night, 13°; clear
18
+28
+13
18 September, wed
+28
+13
Feels like
+20
718 mmHg
59%
3.8
m/s
NW
Climate normal
+22
+16
18 September, Wednesday. day, 28°; night, 13°; clear
19
+16
+11
19 September, thu
+16
+11
Feels like
+11
719 mmHg
92%
5.4
m/s
SW
Climate normal
+21
+17
19 September, Thursday. day, 16°; night, 11°; rain
20
+20
+14
20 September, fri
+20
+14
Feels like
+14
719 mmHg
71%
4.6
m/s
S
Climate normal
+21
+15
20 September, Friday. day, 20°; night, 14°; light rain
21
+16
+13
21 September, sat
+16
+13
Feels like
+14
720 mmHg
94%
3.3
m/s
SW
Climate normal
+21
+16
21 September, Saturday. day, 16°; night, 13°; light rain
Average for 30 days
17
sunny days
5
days with precipitation
8
cloudy days
17 sunny days; 5 days with precipitation; 8 cloudy days;
63
%
air humidity
3.6
m/s
Wind
NW
2
mm of precipitation
(1% of annual average)
air humidity 63%; 2 millimeters of precipitation (1% of annual average); Wind north-westerly 3.6 Meters per second
Forecast in graphs
Temperature
Humidity, %
Wind, m/s
Pressure, mmHg
SW
N
W
NW
N
NE
NW
W
NE
SW
NW
W
NW
NW
NW
NW
W
NW
W
NW
NW
W
NW
NW
W
NW
SW
S
SW
W
24
Average data for 10 years
25
26
27
28
29
30
31
1
September
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Daytime temperature
Night-time temperature