Hourly Weather in Letcher, South Dakota, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
18 km/h
Breezy
19 km/h
Breezy
18 km/h
Breezy
17 km/h
Breezy
15 km/h
Light
18 km/h
Breezy
19 km/h
Breezy
20 km/h
Breezy
21 km/h
Breezy
Humidity
67%
Humid
64%
Humid
64%
Humid
68%
Humid
75%
Extremely humid
79%
Extremely humid
81%
Extremely humid
82%
Extremely humid
85%
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
1009 hPa
Normal
1009 hPa
Normal
1009 hPa
Normal
1009 hPa
Normal
1009 hPa
Low
1009 hPa
Low
1009 hPa
Low
1008 hPa
Low
1008 hPa
Low
Clouds
16%
7%
4%
0%
0%
0%
0%
2%
3%
Dew point
20°
20°
20°
21°
21°
20°
20°
20°
20°
UV Index
4
2
1
0
0
0
0
0
0
Air quality
54
Moderate
56
Moderate
57
Moderate
59
Moderate
61
Moderate
52
Moderate
50
Moderate
45
Good
42
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
27 μg/m3
27 μg/m3
27 μg/m3
27 μg/m3
27 μg/m3
10.4 μg/m3
9.4 μg/m3
8.5 μg/m3
7.9 μg/m3
PM25
10.7 μg/m3
11.5 μg/m3
12.5 μg/m3
13.3 μg/m3
14.1 μg/m3
9.8 μg/m3
8.9 μg/m3
8.1 μg/m3
7.5 μg/m3
NO2
0.5 ppb
0.5 ppb
0.6 ppb
1.1 ppb
1.5 ppb
2 ppb
2.1 ppb
2.3 ppb
2.5 ppb
SO2
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.1 ppb
0.2 ppb
0.2 ppb
0.2 ppb
CO
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
O3
30.9 ppb
33.1 ppb
35.4 ppb
37.6 ppb
39.5 ppb
50.1 ppb
47.8 ppb
44.8 ppb
41.9 ppb