Hourly Weather in Johnston Airport, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
10 mph
Breezy
10 mph
Breezy
10 mph
Breezy
9 mph
Light
9 mph
Light
8 mph
Light
8 mph
Light
8 mph
Light
8 mph
Light
Humidity
90%
Extremely humid
90%
Extremely humid
91%
Extremely humid
90%
Extremely humid
91%
Extremely humid
90%
Extremely humid
90%
Extremely humid
90%
Extremely humid
88%
Extremely humid
Visibility
8 mi
Good
4 mi
Fair
6 mi
Fair
8 mi
Good
4 mi
Fair
8 mi
Good
4 mi
Fair
8 mi
Good
8 mi
Good
Pressure
1013 hPa
Normal
1012 hPa
Normal
1012 hPa
Normal
1012 hPa
Normal
1012 hPa
Normal
1013 hPa
Normal
1014 hPa
Normal
1014 hPa
Normal
1015 hPa
Normal
Clouds
100%
100%
100%
100%
100%
100%
100%
100%
100%
Dew point
38°
38°
37°
37°
37°
37°
37°
37°
36°
UV Index
0
0
0
0
0
0
0
0
0
Air quality
54
Moderate
54
Moderate
54
Moderate
53
Moderate
53
Moderate
53
Moderate
53
Moderate
50
Moderate
42
Good
Pollen index
Tree
3 / 5
3 / 5
3 / 5
3 / 5
3 / 5
4 / 5
4 / 5
4 / 5
4 / 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
0.38 μg/ft3
0.38 μg/ft3
0.38 μg/ft3
0.37 μg/ft3
0.37 μg/ft3
0.37 μg/ft3
0.36 μg/ft3
0.31 μg/ft3
0.24 μg/ft3
PM25
0.31 μg/ft3
0.31 μg/ft3
0.30 μg/ft3
0.29 μg/ft3
0.29 μg/ft3
0.29 μg/ft3
0.28 μg/ft3
0.25 μg/ft3
0.21 μg/ft3
NO2
0.6 ppb
0.6 ppb
0.6 ppb
0.7 ppb
0.8 ppb
0.9 ppb
1 ppb
1.1 ppb
1.2 ppb
SO2
0.1 ppb
0.1 ppb
0.1 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.1 ppb
0.1 ppb
0.1 ppb
CO
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.2 ppb
0.2 ppb
0.2 ppb
O3
43.1 ppb
43.1 ppb
42.9 ppb
42.5 ppb
41.9 ppb
40.7 ppb
38.3 ppb
35.2 ppb
31.5 ppb