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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
25
+27
+20
25 August, sun
+27
+20
Feels like
+28
757 mmHg
51%
4.5
m/s
NW
25 August, Sunday. day, 27°; night, 20°; rain
26
+28
+20
26 August, mon
+28
+20
Feels like
+29
757 mmHg
50%
3.7
m/s
NW
26 August, Monday. day, 28°; night, 20°; clear
27
+24
+18
27 August, tue
+24
+18
Feels like
+25
757 mmHg
61%
3
m/s
N
27 August, Tuesday. day, 24°; night, 18°; clear
28
+23
+17
28 August, wed
+23
+17
Feels like
+24
756 mmHg
67%
4.4
m/s
SW
28 August, Wednesday. day, 23°; night, 17°; partly cloudy
29
+24
+16
29 August, thu
+24
+16
Feels like
+24
757 mmHg
64%
4
m/s
NW
29 August, Thursday. day, 24°; night, 16°; clear
30
+22
+17
30 August, fri
+22
+17
Feels like
+22
757 mmHg
62%
4.4
m/s
NW
30 August, Friday. day, 22°; night, 17°; clear
31
August
+36
+16
31 August, sat
+36
+16
Feels like
+30
753 mmHg
48%
2.1
m/s
SW
Climate normal
+23
+17
31 August, Saturday. day, 36°; night, 16°; mostly clear
1 September
+30
+15
1 September, sun
+30
+15
Feels like
+26
752 mmHg
59%
2.7
m/s
SW
Climate normal
+24
+17
1 September, Sunday. day, 30°; night, 15°; partly cloudy
2
+23
+15
2 September, mon
+23
+15
Feels like
+19
754 mmHg
67%
3.1
m/s
SW
Climate normal
+24
+18
2 September, Monday. day, 23°; night, 15°; partly cloudy
3
+27
+13
3 September, tue
+27
+13
Feels like
+22
757 mmHg
61%
2.6
m/s
N
Climate normal
+24
+18
3 September, Tuesday. day, 27°; night, 13°; light rain
4
+33
+15
4 September, wed
+33
+15
Feels like
+26
755 mmHg
56%
2.8
m/s
N
Climate normal
+24
+17
4 September, Wednesday. day, 33°; night, 15°; clear
5
+36
+17
5 September, thu
+36
+17
Feels like
+30
755 mmHg
49%
2.5
m/s
NW
Climate normal
+24
+18
5 September, Thursday. day, 36°; night, 17°; mostly clear
6
+30
+17
6 September, fri
+30
+17
Feels like
+26
755 mmHg
55%
3.2
m/s
N
Climate normal
+24
+18
6 September, Friday. day, 30°; night, 17°; partly cloudy
7
+29
+16
7 September, sat
+29
+16
Feels like
+25
754 mmHg
61%
2.9
m/s
NW
Climate normal
+25
+19
7 September, Saturday. day, 29°; night, 16°; light rain
8
+28
+15
8 September, sun
+28
+15
Feels like
+24
752 mmHg
59%
2.7
m/s
NW
Climate normal
+25
+17
8 September, Sunday. day, 28°; night, 15°; mostly clear
9
+26
+15
9 September, mon
+26
+15
Feels like
+21
754 mmHg
68%
3.5
m/s
S
Climate normal
+26
+18
9 September, Monday. day, 26°; night, 15°; partly cloudy
10
+30
+16
10 September, tue
+30
+16
Feels like
+22
753 mmHg
63%
3.7
m/s
SW
Climate normal
+29
+19
10 September, Tuesday. day, 30°; night, 16°; partly cloudy
11
+28
+17
11 September, wed
+28
+17
Feels like
+23
755 mmHg
64%
3.1
m/s
SW
Climate normal
+26
+17
11 September, Wednesday. day, 28°; night, 17°; partly cloudy
12
+24
+11
12 September, thu
+24
+11
Feels like
+16
720 mmHg
63%
4.4
m/s
NW
Climate normal
+24
+16
12 September, Thursday. day, 24°; night, 11°; clear
13
+23
+9
13 September, fri
+23
+9
Feels like
+15
722 mmHg
61%
4.6
m/s
NW
Climate normal
+24
+18
13 September, Friday. day, 23°; night, 9°; mostly clear
14
+25
+13
14 September, sat
+25
+13
Feels like
+16
721 mmHg
46%
5.1
m/s
N
Climate normal
+24
+18
14 September, Saturday. day, 25°; night, 13°; clear
15
+29
+9
15 September, sun
+29
+9
Feels like
+20
719 mmHg
55%
4.1
m/s
NW
Climate normal
+23
+17
15 September, Sunday. day, 29°; night, 9°; mostly clear
16
+27
+9
16 September, mon
+27
+9
Feels like
+18
720 mmHg
55%
4.3
m/s
NW
Climate normal
+21
+17
16 September, Monday. day, 27°; night, 9°; clear
17
+27
+14
17 September, tue
+27
+14
Feels like
+19
719 mmHg
49%
4
m/s
NW
Climate normal
+22
+17
17 September, Tuesday. day, 27°; night, 14°; clear
18
+31
+13
18 September, wed
+31
+13
Feels like
+21
716 mmHg
50%
2.5
m/s
NW
Climate normal
+22
+16
18 September, Wednesday. day, 31°; night, 13°; clear
19
+23
+11
19 September, thu
+23
+11
Feels like
+15
717 mmHg
65%
3.5
m/s
SW
Climate normal
+21
+17
19 September, Thursday. day, 23°; night, 11°; clear
20
+17
+13
20 September, fri
+17
+13
Feels like
+13
718 mmHg
87%
3.5
m/s
S
Climate normal
+21
+15
20 September, Friday. day, 17°; night, 13°; rain
21
+21
+13
21 September, sat
+21
+13
Feels like
+15
717 mmHg
70%
3.9
m/s
S
Climate normal
+21
+16
21 September, Saturday. day, 21°; night, 13°; light rain
22
+14
+9
22 September, sun
+14
+9
Feels like
+11
718 mmHg
90%
3.3
m/s
SW
Climate normal
+20
+15
22 September, Sunday. day, 14°; night, 9°; rain
23
+16
+14
23 September, mon
+16
+14
Feels like
+12
717 mmHg
63%
3.3
m/s
SW
Climate normal
+20
+16
23 September, Monday. day, 16°; night, 14°; partly cloudy
24
+14
+7
24 September, tue
+14
+7
Feels like
+9
717 mmHg
93%
5
m/s
SW
Climate normal
+20
+16
24 September, Tuesday. day, 14°; night, 7°; rain
25
+16
+9
25 September, wed
+16
+9
Feels like
+10
719 mmHg
73%
2.5
m/s
E
Climate normal
+21
+15
25 September, Wednesday. day, 16°; night, 9°; mostly clear
26
+16
+13
26 September, thu
+16
+13
Feels like
+12
717 mmHg
80%
3.7
m/s
S
Climate normal
+23
+16
26 September, Thursday. day, 16°; night, 13°; light rain
27
+22
+11
27 September, fri
+22
+11
Feels like
+16
715 mmHg
74%
2.6
m/s
E
Climate normal
+23
+16
27 September, Friday. day, 22°; night, 11°; clear
28
+23
+13
28 September, sat
+23
+13
Feels like
+18
715 mmHg
68%
3
m/s
W
Climate normal
+21
+15
28 September, Saturday. day, 23°; night, 13°; clear
Average for 30 days
16
sunny days
7
days with precipitation
7
cloudy days
16 sunny days; 7 days with precipitation; 7 cloudy days;
64
%
air humidity
3.4
m/s
Wind
NW
6
mm of precipitation
(1% of annual average)
air humidity 64%; 6 millimeters of precipitation (1% of annual average); Wind north-westerly 3.4 Meters per second
Forecast in graphs
Temperature
Humidity, %
Wind, m/s
Pressure, mmHg
SW
SW
SW
N
N
NW
N
NW
NW
S
SW
SW
NW
NW
N
NW
NW
NW
NW
SW
S
S
SW
SW
SW
E
S
E
W
S
31
Average data for 10 years
1
September
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
Daytime temperature
Night-time temperature