Hourly Weather in Roy, Montana, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
22 km/h
Breezy
22 km/h
Breezy
25 km/h
Breezy
25 km/h
Breezy
27 km/h
Breezy
26 km/h
Breezy
26 km/h
Breezy
24 km/h
Breezy
19 km/h
Breezy
Humidity
31%
Dry
33%
Dry
28%
Very dry
28%
Very dry
29%
Very dry
28%
Very dry
24%
Very dry
22%
Very dry
20%
Very dry
Visibility
16 km
Good
16 km
Good
16 km
Good
16 km
Good
16 km
Good
11 km
Good
6 km
Fair
5 km
Low
4 km
Low
Pressure
1006 hPa
Low
1008 hPa
Low
1008 hPa
Low
1009 hPa
Normal
1009 hPa
Normal
1009 hPa
Normal
1010 hPa
Normal
1010 hPa
Normal
1010 hPa
Normal
Clouds
87%
74%
0%
0%
0%
0%
0%
0%
0%
Dew point
7°
8°
5°
4°
5°
5°
4°
4°
3°
UV Index
0
0
0
0
1
2
4
6
8
Air quality
50
Moderate
54
Moderate
57
Moderate
60
Moderate
63
Moderate
66
Moderate
53
Moderate
58
Moderate
63
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
5 / 5
5 / 5
5 / 5
5 / 5
5 / 5
5 / 5
5 / 5
5 / 5
5 / 5
Pollutants
Low risk
High risk
PM10
17.3 μg/m3
17.3 μg/m3
17.3 μg/m3
17.3 μg/m3
17.3 μg/m3
17.3 μg/m3
10.9 μg/m3
13.7 μg/m3
16.1 μg/m3
PM25
8.9 μg/m3
10.4 μg/m3
12.1 μg/m3
13.9 μg/m3
15.5 μg/m3
17 μg/m3
10.3 μg/m3
12.9 μg/m3
15.2 μg/m3
NO2
2.3 ppb
2 ppb
1.7 ppb
1.4 ppb
1 ppb
0.6 ppb
0.5 ppb
0.4 ppb
0.4 ppb
SO2
0.1 ppb
0.1 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.3 ppb
CO
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.2 ppb
0.2 ppb
O3
42 ppb
43 ppb
44.1 ppb
45.2 ppb
46.3 ppb
47.2 ppb
53.7 ppb
58.2 ppb
62.7 ppb