Hourly Weather in Keystone, South Dakota, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
7 km/h
Calm
5 km/h
Calm
10 km/h
Light
12 km/h
Light
14 km/h
Light
15 km/h
Light
18 km/h
Breezy
8 km/h
Calm
6 km/h
Calm
Humidity
48%
Comfortable
37%
Dry
26%
Very dry
22%
Very dry
20%
Very dry
19%
Extremely dry
18%
Extremely dry
24%
Very dry
24%
Very dry
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
1008 hPa
Low
1008 hPa
Low
1009 hPa
Low
1008 hPa
Low
1007 hPa
Low
1006 hPa
Low
1006 hPa
Low
1006 hPa
Low
1006 hPa
Low
Clouds
0%
0%
0%
2%
9%
1%
5%
1%
0%
Dew point
15°
13°
9°
8°
7°
7°
7°
10°
10°
UV Index
6
8
10
10
9
7
5
2
1
Air quality
43
Good
47
Good
52
Moderate
54
Moderate
58
Moderate
60
Moderate
51
Moderate
52
Moderate
53
Moderate
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
2 / 5
2 / 5
3 / 5
3 / 5
3 / 5
3 / 5
3 / 5
3 / 5
3 / 5
Pollutants
Low risk
High risk
PM10
10.8 μg/m3
10.8 μg/m3
10.8 μg/m3
10.8 μg/m3
9.7 μg/m3
9.7 μg/m3
10.3 μg/m3
10.9 μg/m3
11.6 μg/m3
PM25
7.7 μg/m3
8.4 μg/m3
9.4 μg/m3
10.5 μg/m3
12.8 μg/m3
13.8 μg/m3
9.2 μg/m3
9.7 μg/m3
10.3 μg/m3
NO2
0.8 ppb
0.5 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
SO2
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
CO
0.2 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
39.3 ppb
40.2 ppb
41.5 ppb
43 ppb
42.7 ppb
44.9 ppb
48.5 ppb
48.9 ppb
49.2 ppb