Hourly Weather in Mercer Island, Washington, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
6 km/h
Calm
8 km/h
Calm
10 km/h
Light
11 km/h
Light
9 km/h
Light
10 km/h
Light
10 km/h
Light
9 km/h
Light
12 km/h
Light
Humidity
65%
Humid
71%
Extremely humid
73%
Extremely humid
78%
Extremely humid
82%
Extremely humid
84%
Extremely humid
84%
Extremely humid
82%
Extremely humid
80%
Extremely humid
Visibility
16 km
Good
16 km
Good
16 km
Good
16 km
Good
16 km
Good
16 km
Good
16 km
Good
16 km
Good
16 km
Good
Pressure
1016 hPa
Normal
1016 hPa
Normal
1016 hPa
Normal
1016 hPa
Normal
1016 hPa
Normal
1016 hPa
Normal
1016 hPa
Normal
1016 hPa
Normal
1017 hPa
Normal
Clouds
9%
0%
0%
1%
13%
39%
100%
100%
62%
Dew point
13°
14°
13°
14°
14°
14°
14°
14°
14°
UV Index
0
0
0
0
0
0
0
0
0
Air quality
16
Good
17
Good
18
Good
19
Good
22
Good
25
Good
28
Good
42
Good
39
Good
Pollen index
Tree
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 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
5.4 μg/m3
5.4 μg/m3
5.4 μg/m3
5.4 μg/m3
5.4 μg/m3
5.4 μg/m3
5.4 μg/m3
9.1 μg/m3
8.6 μg/m3
PM25
2.1 μg/m3
2.4 μg/m3
2.9 μg/m3
3.4 μg/m3
3.9 μg/m3
4.4 μg/m3
4.9 μg/m3
7.4 μg/m3
6.9 μg/m3
NO2
8.9 ppb
9.7 ppb
10.4 ppb
11.1 ppb
10 ppb
8.9 ppb
7.7 ppb
6.1 ppb
4.3 ppb
SO2
0.3 ppb
0.3 ppb
0.3 ppb
0.4 ppb
0.4 ppb
0.4 ppb
0.4 ppb
0.4 ppb
0.4 ppb
CO
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
O3
17.7 ppb
18.5 ppb
19.6 ppb
20.9 ppb
22.3 ppb
23.5 ppb
24.7 ppb
13.1 ppb
14.8 ppb