Hourly Weather in Lewistown, Montana, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
7 mph
Light
8 mph
Light
5 mph
Light
4 mph
Calm
3 mph
Calm
3 mph
Calm
4 mph
Calm
6 mph
Light
7 mph
Light
Humidity
36%
Dry
32%
Dry
25%
Very dry
27%
Very dry
29%
Very dry
41%
Dry
51%
Comfortable
61%
Humid
64%
Humid
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
1013 hPa
Normal
1012 hPa
Normal
1009 hPa
Low
1008 hPa
Low
1008 hPa
Low
1008 hPa
Low
1008 hPa
Low
1008 hPa
Low
1009 hPa
Normal
Clouds
27%
52%
38%
31%
24%
12%
4%
1%
0%
Dew point
41°
39°
36°
37°
38°
45°
46°
44°
43°
UV Index
8
6
4
2
1
0
0
0
0
Air quality
41
Good
42
Good
43
Good
43
Good
42
Good
42
Good
40
Good
36
Good
31
Good
Pollen index
Tree
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
Weed
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
Grass
3 / 5
4 / 5
5 / 5
5 / 5
4 / 5
4 / 5
5 / 5
5 / 5
5 / 5
Pollutants
Low risk
High risk
PM10
0.14 μg/ft3
0.14 μg/ft3
0.14 μg/ft3
0.14 μg/ft3
0.14 μg/ft3
0.14 μg/ft3
0.15 μg/ft3
0.16 μg/ft3
0.16 μg/ft3
PM25
0.09 μg/ft3
0.09 μg/ft3
0.09 μg/ft3
0.09 μg/ft3
0.09 μg/ft3
0.09 μg/ft3
0.10 μg/ft3
0.10 μg/ft3
0.10 μg/ft3
NO2
0.13 ppb
0.11 ppb
0.14 ppb
0.16 ppb
0.19 ppb
0.76 ppb
1.34 ppb
1.91 ppb
2.25 ppb
SO2
0.07 ppb
0.07 ppb
0.06 ppb
0.06 ppb
0.06 ppb
0.06 ppb
0.05 ppb
0.05 ppb
0.05 ppb
CO
0.11 ppb
0.11 ppb
0.11 ppb
0.11 ppb
0.11 ppb
0.12 ppb
0.13 ppb
0.13 ppb
0.14 ppb
O3
46.51 ppb
47.26 ppb
46.76 ppb
46.26 ppb
45.76 ppb
41.23 ppb
36.71 ppb
32.18 ppb
27.67 ppb