Hourly Weather in Portland, Maine, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
5 mph
Calm
4 mph
Calm
5 mph
Calm
6 mph
Light
8 mph
Light
9 mph
Light
9 mph
Light
8 mph
Light
9 mph
Light
Humidity
79%
Extremely humid
77%
Extremely humid
70%
Extremely humid
64%
Humid
59%
Comfortable
54%
Comfortable
51%
Comfortable
47%
Comfortable
44%
Dry
Visibility
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
Pressure
1016 hPa
Normal
1016 hPa
Normal
1017 hPa
Normal
1017 hPa
Normal
1017 hPa
Normal
1017 hPa
Normal
1016 hPa
Normal
1016 hPa
Normal
1016 hPa
Normal
Clouds
0%
0%
0%
0%
0%
0%
1%
24%
9%
Dew point
68°
68°
68°
69°
69°
69°
68°
68°
66°
UV Index
0
0
1
2
4
6
8
9
9
Air quality
56
Moderate
57
Moderate
59
Moderate
61
Moderate
62
Moderate
51
Moderate
53
Moderate
54
Moderate
55
Moderate
Pollen index
Tree
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
Weed
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
Grass
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
Pollutants
Low risk
High risk
PM10
0.73 μg/ft3
0.73 μg/ft3
0.73 μg/ft3
0.73 μg/ft3
0.73 μg/ft3
0.21 μg/ft3
0.21 μg/ft3
0.21 μg/ft3
0.22 μg/ft3
PM25
0.33 μg/ft3
0.35 μg/ft3
0.38 μg/ft3
0.40 μg/ft3
0.42 μg/ft3
0.20 μg/ft3
0.20 μg/ft3
0.20 μg/ft3
0.20 μg/ft3
NO2
2.5 ppb
2.4 ppb
2.3 ppb
2.2 ppb
1.8 ppb
1.5 ppb
1.1 ppb
1 ppb
1 ppb
SO2
0.9 ppb
1 ppb
1 ppb
1 ppb
0.9 ppb
0.7 ppb
0.5 ppb
0.5 ppb
0.4 ppb
CO
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.1 ppb
0.1 ppb
0.1 ppb
O3
27.3 ppb
32.2 ppb
37.4 ppb
42.3 ppb
46.6 ppb
55 ppb
57.3 ppb
58.9 ppb
60.2 ppb