Hourly Weather in Mount Saint Helens Viewpoint, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
18 km/h
Breezy
17 km/h
Breezy
16 km/h
Light
14 km/h
Light
6 km/h
Calm
4 km/h
Calm
2 km/h
Calm
5 km/h
Calm
4 km/h
Calm
Humidity
68%
Humid
72%
Extremely humid
76%
Extremely humid
79%
Extremely humid
84%
Extremely humid
88%
Extremely humid
89%
Extremely humid
92%
Extremely humid
97%
Extremely humid
Visibility
16 km
Good
16 km
Good
16 km
Good
16 km
Good
16 km
Good
14 km
Good
14 km
Good
13 km
Good
6 km
Fair
Pressure
1015 hPa
Normal
1015 hPa
Normal
1015 hPa
Normal
1015 hPa
Normal
1015 hPa
Normal
1015 hPa
Normal
1015 hPa
Normal
1015 hPa
Normal
1016 hPa
Normal
Clouds
26%
20%
14%
5%
4%
1%
8%
95%
90%
Dew point
8°
9°
9°
9°
9°
9°
9°
10°
10°
UV Index
1
0
0
0
0
0
0
0
0
Air quality
24
Good
24
Good
23
Good
22
Good
24
Good
21
Good
18
Good
16
Good
15
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
5 / 5
5 / 5
5 / 5
4 / 5
4 / 5
4 / 5
4 / 5
4 / 5
4 / 5
Pollutants
Low risk
High risk
PM10
11.9 μg/m3
11.9 μg/m3
11.9 μg/m3
11.9 μg/m3
3.5 μg/m3
3.4 μg/m3
3.5 μg/m3
3.5 μg/m3
3.6 μg/m3
PM25
3.6 μg/m3
3.7 μg/m3
3.8 μg/m3
3.9 μg/m3
2.6 μg/m3
2.5 μg/m3
2.6 μg/m3
2.6 μg/m3
2.7 μg/m3
NO2
0.5 ppb
0.6 ppb
0.6 ppb
0.7 ppb
1.5 ppb
2.5 ppb
3.4 ppb
4.1 ppb
4.8 ppb
SO2
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.1 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
26.1 ppb
25.4 ppb
24.8 ppb
24.2 ppb
25.3 ppb
22.2 ppb
19.2 ppb
17 ppb
15.2 ppb