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Monthly
Precipitation
Temperature
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Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Portland, CT
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May
Average Temperature
High
22°
Feels 22
Low
10°
Feels 9
Average Precipitation
12 Days
Rain amount
88.8mm
Snow amount
0cm
Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
29°
19
32°
20
31°
21
19°
22
19°
23
14°
24
15°
25
18°
26
20°
27
21°
28
21°
29
22°
30
22°
31
22°
Forecast
Monday, May 18, 2026
Day
29°
Feels 29
Wind
17 km/h S
Gust
37 km/h
Humidity
46%
P.O.P
30%
Night
19°
Feels 19
Wind
16 km/h S
Gust
32 km/h
Humidity
78%
P.O.P
30%
Historical Averages
May 18
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.