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May 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
28
+10
+8
28 April, Sunday. day, 10°; night, 8°; rain
29
+10
+7
29 April, Monday. day, 10°; night, 7°; partly cloudy
30
+10
+7
30 April, Tuesday. day, 10°; night, 7°; partly cloudy
1
+10
+8
1 May, Wednesday. day, 10°; night, 8°; overcast
2
+11
+8
2 May, Thursday. day, 11°; night, 8°; clear
3
+12
+8
3 May, Friday. day, 12°; night, 8°; overcast
4
+11
+9
4 May, Saturday. day, 11°; night, 9°; rain
5
+12
+8
5 May, Sunday. day, 12°; night, 8°; partly cloudy
6
+13
+9
6 May, Monday. day, 13°; night, 9°; partly cloudy
7
+11
+10
7 May, Tuesday. day, 11°; night, 10°; overcast
8
+11
+9
8 May, Wednesday. day, 11°; night, 9°; rain
9
+13
+9
9 May, Thursday. day, 13°; night, 9°; rain
10
+13
+9
10 May, Friday. day, 13°; night, 9°; partly cloudy
11
+14
+10
11 May, Saturday. day, 14°; night, 10°; clear
12
+13
+9
12 May, Sunday. day, 13°; night, 9°; partly cloudy
13
+12
+9
13 May, Monday. day, 12°; night, 9°; clear
14
+13
+10
14 May, Tuesday. day, 13°; night, 10°; rain
15
+14
+10
15 May, Wednesday. day, 14°; night, 10°; rain
16
+14
+11
16 May, Thursday. day, 14°; night, 11°; rain
17
+13
+11
17 May, Friday. day, 13°; night, 11°; overcast
18
+13
+10
18 May, Saturday. day, 13°; night, 10°; clear
19
+15
+11
19 May, Sunday. day, 15°; night, 11°; partly cloudy
20
+15
+12
20 May, Monday. day, 15°; night, 12°; clear
21
+13
+11
21 May, Tuesday. day, 13°; night, 11°; overcast
22
+13
+10
22 May, Wednesday. day, 13°; night, 10°; rain
23
+17
+12
23 May, Thursday. day, 17°; night, 12°; rain
24
+15
+13
24 May, Friday. day, 15°; night, 13°; rain
25
+16
+12
25 May, Saturday. day, 16°; night, 12°; rain
26
+16
+13
26 May, Sunday. day, 16°; night, 13°; clear
27
+14
+12
27 May, Monday. day, 14°; night, 12°; rain
28
+15
+11
28 May, Tuesday. day, 15°; night, 11°; rain
29
+16
+12
29 May, Wednesday. day, 16°; night, 12°; rain
30
+16
+13
30 May, Thursday. day, 16°; night, 13°; rain
31
+17
+13
31 May, Friday. day, 17°; night, 13°; rain
1
+16
+14
1 June, Saturday. day, 16°; night, 14°; clear
Average data for 10 years
Portland May
6
sunny days
15
days with precipitation
10
cloudy days
6 sunny days; 15 days with precipitation; 10 cloudy days;
77
%
air humidity
3.5
m/s
Wind
SW
70
mm of precipitation
(8% of annual average)
+11
°C
Water temperature
air humidity 77%; 70 millimeters of precipitation (8% of annual average); Wind south-westerly 3.5 Meters per second; Water temperature +11°
Weather graphs for May
Temperature
Water temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
S
S
S
E
SW
S
SE
SW
W
N
W
SW
SE
SW
SW
SW
S
W
W
S
S
S
SW
NE
SW
S
SE
SE
S
S
S
1
Average data for 10 years
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
30
31
Daytime temperature
Night-time temperature
Cities near you
Boston
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Quebec
Colchester
Lake George
Hartford
Anjou
Queensbury
Nantucket
Cities with similar weather in May
Helsinki
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Oslo
Yurmala
Palanga
Copenhagen
Gdansk