Hourly Weather in Roy, Montana, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
10 mph
Breezy
9 mph
Light
9 mph
Light
9 mph
Light
10 mph
Breezy
10 mph
Light
10 mph
Light
10 mph
Light
10 mph
Breezy
Humidity
30%
Dry
35%
Dry
40%
Dry
43%
Dry
47%
Comfortable
50%
Comfortable
53%
Comfortable
55%
Comfortable
59%
Comfortable
Visibility
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
Pressure
1018 hPa
High
1018 hPa
High
1018 hPa
High
1018 hPa
High
1019 hPa
High
1019 hPa
High
1018 hPa
High
1018 hPa
High
1018 hPa
High
Clouds
3%
0%
0%
0%
6%
100%
100%
100%
100%
Dew point
33°
34°
33°
33°
33°
34°
34°
35°
36°
UV Index
0
0
0
0
0
0
0
0
0
Air quality
42
Good
42
Good
41
Good
41
Good
40
Good
39
Good
38
Good
38
Good
39
Good
Pollen index
Tree
0 / 5
0 / 5
0 / 5
1 / 5
0 / 5
1 / 5
1 / 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
4 / 5
4 / 5
4 / 5
3 / 5
2 / 5
Pollutants
Low risk
High risk
PM10
0.44 μg/ft3
0.43 μg/ft3
0.41 μg/ft3
0.40 μg/ft3
0.38 μg/ft3
0.37 μg/ft3
0.35 μg/ft3
0.41 μg/ft3
0.41 μg/ft3
PM25
0.29 μg/ft3
0.29 μg/ft3
0.28 μg/ft3
0.27 μg/ft3
0.26 μg/ft3
0.25 μg/ft3
0.23 μg/ft3
0.27 μg/ft3
0.27 μg/ft3
NO2
0.62 ppb
0.79 ppb
0.89 ppb
0.99 ppb
1.09 ppb
0.96 ppb
0.84 ppb
0.72 ppb
0.67 ppb
SO2
0.02 ppb
0.02 ppb
0.03 ppb
0.03 ppb
0.03 ppb
0.03 ppb
0.03 ppb
0.03 ppb
0.03 ppb
CO
0.1 ppb
0.11 ppb
0.11 ppb
0.11 ppb
0.11 ppb
0.11 ppb
0.11 ppb
0.11 ppb
0.1 ppb
O3
40.76 ppb
38.09 ppb
36.42 ppb
34.75 ppb
33.08 ppb
33.78 ppb
34.47 ppb
35.16 ppb
33.56 ppb