Average data for 10 years
1 May
Wednesday
+11°
+8°
2 May
Thursday
+12°
+8°
3 May
Friday
+12°
+8°
4 May
Saturday
+11°
+9°
5 May
Sunday
+13°
+8°
6 May
Monday
+14°
+9°
7 May
Tuesday
+12°
+10°
8 May
Wednesday
+11°
+9°
9 May
Thursday
+13°
+9°
10 May
Friday
+13°
+9°
11 May
Saturday
+14°
+9°
12 May
Sunday
+13°
+9°
13 May
Monday
+12°
+9°
14 May
Tuesday
+14°
+10°
15 May
Wednesday
+14°
+10°
16 May
Thursday
+15°
+11°
17 May
Friday
+14°
+11°
18 May
Saturday
+14°
+10°
19 May
Sunday
+16°
+11°
20 May
Monday
+16°
+12°
21 May
Tuesday
+14°
+12°
22 May
Wednesday
+13°
+10°
23 May
Thursday
+18°
+12°
24 May
Friday
+16°
+13°
25 May
Saturday
+17°
+11°
26 May
Sunday
+17°
+13°
27 May
Monday
+15°
+12°
28 May
Tuesday
+16°
+11°
29 May
Wednesday
+17°
+12°
30 May
Thursday
+17°
+13°
31 May
Friday
+18°
+13°
May in South Portland is the cloudiest month of the year. In May, the weather in South Portland is typically warm. Average daily high temperature in May is about 14 degrees above zero. On average, South Portland has 11 rainy, 8 cloudy, 6 sunny, and 6 partly cloudy days in May. The rains are usually moderate.