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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
August
+21
+14
22 August, thu
+21
+14
Feels like
+17
751 mmHg
73%
3
m/s
SW
Climate normal
+25
+18
22 August, Thursday. day, 21°; night, 14°; light rain
23
+17
+12
23 August, fri
+17
+12
Feels like
+13
751 mmHg
84%
3.6
m/s
SW
Climate normal
+27
+18
23 August, Friday. day, 17°; night, 12°; rain
24
+21
+12
24 August, sat
+21
+12
Feels like
+15
756 mmHg
73%
3.3
m/s
SW
Climate normal
+27
+19
24 August, Saturday. day, 21°; night, 12°; partly cloudy
25
+25
+12
25 August, sun
+25
+12
Feels like
+22
760 mmHg
62%
2.5
m/s
N
Climate normal
+27
+20
25 August, Sunday. day, 25°; night, 12°; mostly clear
26
+28
+16
26 August, mon
+28
+16
Feels like
+23
758 mmHg
57%
2.4
m/s
N
Climate normal
+28
+20
26 August, Monday. day, 28°; night, 16°; partly cloudy
27
+22
+10
27 August, tue
+22
+10
Feels like
+16
759 mmHg
52%
4.1
m/s
NW
Climate normal
+24
+18
27 August, Tuesday. day, 22°; night, 10°; light rain
28
+26
+12
28 August, wed
+26
+12
Feels like
+18
758 mmHg
50%
3.8
m/s
N
Climate normal
+23
+17
28 August, Wednesday. day, 26°; night, 12°; clear
29
+31
+15
29 August, thu
+31
+15
Feels like
+23
755 mmHg
46%
3.4
m/s
NE
Climate normal
+24
+16
29 August, Thursday. day, 31°; night, 15°; mostly clear
30
+31
+14
30 August, fri
+31
+14
Feels like
+25
754 mmHg
43%
2.9
m/s
SW
Climate normal
+22
+17
30 August, Friday. day, 31°; night, 14°; clear
31
+27
+14
31 August, sat
+27
+14
Feels like
+23
755 mmHg
56%
2.2
m/s
SW
Climate normal
+23
+17
31 August, Saturday. day, 27°; night, 14°; partly cloudy
1 September
+26
+15
1 September, sun
+26
+15
Feels like
+23
754 mmHg
62%
2.5
m/s
SW
Climate normal
+24
+17
1 September, Sunday. day, 26°; night, 15°; partly cloudy
2
+25
+17
2 September, mon
+25
+17
Feels like
+20
753 mmHg
68%
3.1
m/s
SW
Climate normal
+24
+18
2 September, Monday. day, 25°; night, 17°; partly cloudy
3
+26
+9
3 September, tue
+26
+9
Feels like
+20
718 mmHg
49%
3.8
m/s
W
Climate normal
+24
+18
3 September, Tuesday. day, 26°; night, 9°; partly cloudy
4
+27
+7
4 September, wed
+27
+7
Feels like
+17
718 mmHg
57%
4.4
m/s
NW
Climate normal
+24
+17
4 September, Wednesday. day, 27°; night, 7°; clear
5
+26
+7
5 September, thu
+26
+7
Feels like
+17
719 mmHg
57%
4.3
m/s
NW
Climate normal
+24
+18
5 September, Thursday. day, 26°; night, 7°; clear
6
+27
+9
6 September, fri
+27
+9
Feels like
+18
718 mmHg
48%
4.4
m/s
N
Climate normal
+24
+18
6 September, Friday. day, 27°; night, 9°; clear
7
+28
+12
7 September, sat
+28
+12
Feels like
+21
719 mmHg
52%
4.2
m/s
N
Climate normal
+25
+19
7 September, Saturday. day, 28°; night, 12°; clear
8
+30
+15
8 September, sun
+30
+15
Feels like
+21
719 mmHg
53%
4.1
m/s
NW
Climate normal
+25
+17
8 September, Sunday. day, 30°; night, 15°; rain
9
+32
+13
9 September, mon
+32
+13
Feels like
+24
717 mmHg
46%
3.8
m/s
W
Climate normal
+26
+18
9 September, Monday. day, 32°; night, 13°; light rain
10
+25
+15
10 September, tue
+25
+15
Feels like
+19
720 mmHg
73%
4.3
m/s
NW
Climate normal
+29
+19
10 September, Tuesday. day, 25°; night, 15°; mostly clear
11
+26
+13
11 September, wed
+26
+13
Feels like
+18
722 mmHg
53%
4.9
m/s
N
Climate normal
+26
+17
11 September, Wednesday. day, 26°; night, 13°; mostly clear
12
+29
+13
12 September, thu
+29
+13
Feels like
+22
719 mmHg
51%
5
m/s
NW
Climate normal
+24
+16
12 September, Thursday. day, 29°; night, 13°; clear
13
+20
+10
13 September, fri
+20
+10
Feels like
+11
718 mmHg
59%
6.6
m/s
W
Climate normal
+24
+18
13 September, Friday. day, 20°; night, 10°; clear
14
+18
+9
14 September, sat
+18
+9
Feels like
+11
720 mmHg
59%
3.4
m/s
NW
Climate normal
+24
+18
14 September, Saturday. day, 18°; night, 9°; rain
15
+23
+10
15 September, sun
+23
+10
Feels like
+13
721 mmHg
37%
5.1
m/s
NE
Climate normal
+23
+17
15 September, Sunday. day, 23°; night, 10°; clear
16
+23
+13
16 September, mon
+23
+13
Feels like
+15
719 mmHg
49%
4.4
m/s
NW
Climate normal
+21
+17
16 September, Monday. day, 23°; night, 13°; clear
17
+18
+13
17 September, tue
+18
+13
Feels like
+15
720 mmHg
86%
3.4
m/s
W
Climate normal
+22
+17
17 September, Tuesday. day, 18°; night, 13°; rain
18
+21
+9
18 September, wed
+21
+9
Feels like
+12
716 mmHg
74%
4.1
m/s
NW
Climate normal
+22
+16
18 September, Wednesday. day, 21°; night, 9°; mostly clear
19
+16
+8
19 September, thu
+16
+8
Feels like
+11
713 mmHg
76%
4.3
m/s
W
Climate normal
+21
+17
19 September, Thursday. day, 16°; night, 8°; light rain
20
+12
+8
20 September, fri
+12
+8
Feels like
+7
718 mmHg
90%
3.7
m/s
SW
Climate normal
+21
+15
20 September, Friday. day, 12°; night, 8°; partly cloudy
Average data for 10 years
Next, the average data for 10 years
21
+21
+16
21 September, sat
+21
+16
Feels like
+20
757 mmHg
63%
4.1
m/s
SE
21 September, Saturday. day, 21°; night, 16°; partly cloudy
Average for 30 days
18
sunny days
5
days with precipitation
7
cloudy days
18 sunny days; 5 days with precipitation; 7 cloudy days;
60
%
air humidity
3.8
m/s
Wind
NW
19
mm of precipitation
(3% of annual average)
air humidity 60%; 19 millimeters of precipitation (3% of annual average); Wind north-westerly 3.8 Meters per second
Forecast in graphs
Temperature
Humidity, %
Wind, m/s
Pressure, mmHg
SW
SW
SW
N
N
NW
N
NE
SW
SW
SW
SW
W
NW
NW
N
N
NW
W
NW
N
NW
W
NW
NE
NW
W
NW
W
SW
22
Average data for 10 years
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
16
17
18
19
20
Daytime temperature
Night-time temperature