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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
+23
+19
18 August, sun
+23
+19
Feels like
+24
755 mmHg
77%
4.5
m/s
SW
+21
18 August, Sunday. day, 23°; night, 19°; rain
19
+22
+19
19 August, mon
+22
+19
Feels like
+22
756 mmHg
75%
4.5
m/s
W
+20
19 August, Monday. day, 22°; night, 19°; clear
20
+21
+18
20 August, tue
+21
+18
Feels like
+22
757 mmHg
79%
4.5
m/s
S
+20
20 August, Tuesday. day, 21°; night, 18°; clear
21
+22
+19
21 August, wed
+22
+19
Feels like
+22
757 mmHg
80%
5.8
m/s
S
+20
21 August, Wednesday. day, 22°; night, 19°; clear
22
August
+22
+13
22 August, thu
+22
+13
Feels like
+16
762 mmHg
69%
3.7
m/s
SW
+20
Climate normal
+21
+19
22 August, Thursday. day, 22°; night, 13°; light rain
23
+24
+14
23 August, fri
+24
+14
Feels like
+20
765 mmHg
63%
3.2
m/s
S
+20
Climate normal
+21
+18
23 August, Friday. day, 24°; night, 14°; light rain
24
+26
+16
24 August, sat
+26
+16
Feels like
+22
765 mmHg
60%
4.5
m/s
S
+20
Climate normal
+21
+19
24 August, Saturday. day, 26°; night, 16°; partly cloudy
25
+25
+17
25 August, sun
+25
+17
Feels like
+22
764 mmHg
73%
3
m/s
S
+20
Climate normal
+22
+19
25 August, Sunday. day, 25°; night, 17°; partly cloudy
26
+23
+18
26 August, mon
+23
+18
Feels like
+21
763 mmHg
81%
3.5
m/s
E
+21
Climate normal
+22
+18
26 August, Monday. day, 23°; night, 18°; light rain
27
+23
+17
27 August, tue
+23
+17
Feels like
+21
763 mmHg
82%
3.2
m/s
SE
+21
Climate normal
+21
+17
27 August, Tuesday. day, 23°; night, 17°; light rain
28
+25
+18
28 August, wed
+25
+18
Feels like
+22
761 mmHg
74%
3.8
m/s
S
+21
Climate normal
+20
+18
28 August, Wednesday. day, 25°; night, 18°; partly cloudy
29
+25
+16
29 August, thu
+25
+16
Feels like
+23
761 mmHg
70%
3.4
m/s
E
+21
Climate normal
+21
+17
29 August, Thursday. day, 25°; night, 16°; partly cloudy
30
+23
+15
30 August, fri
+23
+15
Feels like
+20
763 mmHg
69%
3.7
m/s
SE
+22
Climate normal
+22
+18
30 August, Friday. day, 23°; night, 15°; mostly clear
31
+23
+15
31 August, sat
+23
+15
Feels like
+19
760 mmHg
67%
5.3
m/s
S
+22
Climate normal
+21
+18
31 August, Saturday. day, 23°; night, 15°; light rain
1 September
+25
+16
1 September, sun
+25
+16
Feels like
+20
761 mmHg
66%
4.8
m/s
SW
Climate normal
+21
+18
1 September, Sunday. day, 25°; night, 16°; partly cloudy
2
+24
+17
2 September, mon
+24
+17
Feels like
+19
760 mmHg
69%
5.8
m/s
SW
Climate normal
+21
+18
2 September, Monday. day, 24°; night, 17°; partly cloudy
3
+20
+18
3 September, tue
+20
+18
Feels like
+17
760 mmHg
80%
4.7
m/s
SE
Climate normal
+21
+17
3 September, Tuesday. day, 20°; night, 18°; mostly clear
4
+23
+18
4 September, wed
+23
+18
Feels like
+21
757 mmHg
87%
1.9
m/s
S
Climate normal
+21
+17
4 September, Wednesday. day, 23°; night, 18°; partly cloudy
5
+23
+19
5 September, thu
+23
+19
Feels like
+20
754 mmHg
80%
4.4
m/s
S
Climate normal
+20
+17
5 September, Thursday. day, 23°; night, 19°; clear
6
+19
+16
6 September, fri
+19
+16
Feels like
+15
759 mmHg
79%
6.9
m/s
NE
Climate normal
+20
+17
6 September, Friday. day, 19°; night, 16°; light rain
7
+19
+16
7 September, sat
+19
+16
Feels like
+14
759 mmHg
79%
6.1
m/s
NE
Climate normal
+20
+17
7 September, Saturday. day, 19°; night, 16°; light rain
8
+21
+17
8 September, sun
+21
+17
Feels like
+15
757 mmHg
70%
5.6
m/s
NW
Climate normal
+20
+16
8 September, Sunday. day, 21°; night, 17°; light rain
9
+20
+16
9 September, mon
+20
+16
Feels like
+17
759 mmHg
75%
3.1
m/s
SE
Climate normal
+19
+16
9 September, Monday. day, 20°; night, 16°; clear
10
+21
+20
10 September, tue
+21
+20
Feels like
+18
758 mmHg
88%
6.5
m/s
SE
Climate normal
+19
+15
10 September, Tuesday. day, 21°; night, 20°; mostly clear
11
+22
+16
11 September, wed
+22
+16
Feels like
+19
755 mmHg
84%
6.8
m/s
SW
Climate normal
+19
+16
11 September, Wednesday. day, 22°; night, 16°; rain
12
+15
+13
12 September, thu
+15
+13
Feels like
+8
760 mmHg
62%
7.2
m/s
NE
Climate normal
+18
+15
12 September, Thursday. day, 15°; night, 13°; clear
13
+17
+12
13 September, fri
+17
+12
Feels like
+10
760 mmHg
70%
4.6
m/s
NE
Climate normal
+19
+16
13 September, Friday. day, 17°; night, 12°; clear
14
+19
+13
14 September, sat
+19
+13
Feels like
+14
762 mmHg
72%
2.9
m/s
E
Climate normal
+19
+16
14 September, Saturday. day, 19°; night, 13°; clear
15
+20
+14
15 September, sun
+20
+14
Feels like
+16
762 mmHg
71%
2.4
m/s
NW
Climate normal
+18
+15
15 September, Sunday. day, 20°; night, 14°; clear
16
+20
+12
16 September, mon
+20
+12
Feels like
+17
761 mmHg
74%
2.9
m/s
SE
Climate normal
+17
+14
16 September, Monday. day, 20°; night, 12°; clear
17
+20
+16
17 September, tue
+20
+16
Feels like
+16
758 mmHg
81%
4.5
m/s
E
Climate normal
+17
+14
17 September, Tuesday. day, 20°; night, 16°; light rain
18
+19
+19
18 September, wed
+19
+19
Feels like
+18
754 mmHg
93%
3.4
m/s
E
Climate normal
+17
+14
18 September, Wednesday. day, 19°; night, 19°; partly cloudy
19
+20
+18
19 September, thu
+20
+18
Feels like
+14
749 mmHg
90%
10.8
m/s
S
Climate normal
+18
+15
19 September, Thursday. day, 20°; night, 18°; partly cloudy
20
+14
+9
20 September, fri
+14
+9
Feels like
+6
749 mmHg
65%
9.4
m/s
NW
Climate normal
+18
+14
20 September, Friday. day, 14°; night, 9°; mostly clear
Average data for 10 years
Next, the average data for 10 years
21
+19
+15
21 September, sat
+19
+15
Feels like
+17
758 mmHg
75%
5.5
m/s
W
+17
21 September, Saturday. day, 19°; night, 15°; clear
Average for 30 days
15
sunny days
6
days with precipitation
9
cloudy days
15 sunny days; 6 days with precipitation; 9 cloudy days;
75
%
air humidity
4.7
m/s
Wind
S
5
mm of precipitation
(1% of annual average)
+21
°C
Water temperature
air humidity 75%; 5 millimeters of precipitation (1% of annual average); Wind southerly 4.7 Meters per second; Water temperature +21°
Forecast in graphs
Temperature
Humidity, %
Wind, m/s
Pressure, mmHg
SW
S
S
S
E
SE
S
E
SE
S
SW
SW
SE
S
S
NE
NE
NW
SE
SE
SW
NE
NE
E
NW
SE
E
E
S
NW
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