Hourly Weather in Valley Forge, Pennsylvania, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
5 km/h
Calm
6 km/h
Calm
4 km/h
Calm
4 km/h
Calm
3 km/h
Calm
5 km/h
Calm
2 km/h
Calm
4 km/h
Calm
5 km/h
Calm
Humidity
79%
Extremely humid
77%
Extremely humid
82%
Extremely humid
81%
Extremely humid
87%
Extremely humid
88%
Extremely humid
87%
Extremely humid
89%
Extremely humid
81%
Extremely humid
Visibility
16 km
Good
16 km
Good
16 km
Good
16 km
Good
14 km
Good
14 km
Good
14 km
Good
15 km
Good
16 km
Good
Pressure
1010 hPa
Normal
1009 hPa
Normal
1010 hPa
Normal
1011 hPa
Normal
1010 hPa
Normal
1011 hPa
Normal
1011 hPa
Normal
1010 hPa
Normal
1011 hPa
Normal
Clouds
6%
5%
1%
0%
1%
5%
0%
0%
0%
Dew point
18°
18°
18°
18°
18°
18°
18°
18°
18°
UV Index
0
0
0
0
0
0
0
0
1
Air quality
48
Good
51
Moderate
52
Moderate
54
Moderate
55
Moderate
56
Moderate
64
Moderate
66
Moderate
67
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
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
Pollutants
Low risk
High risk
PM10
11.9 μg/m3
11.9 μg/m3
11.9 μg/m3
11.9 μg/m3
11.9 μg/m3
11.9 μg/m3
17.1 μg/m3
17.9 μg/m3
18.2 μg/m3
PM25
8.6 μg/m3
9.1 μg/m3
9.8 μg/m3
10.4 μg/m3
11 μg/m3
11.6 μg/m3
16 μg/m3
16.9 μg/m3
17.3 μg/m3
NO2
5.2 ppb
5.6 ppb
5.9 ppb
6.4 ppb
6.8 ppb
7.4 ppb
7.3 ppb
7.2 ppb
7.1 ppb
SO2
0.5 ppb
0.5 ppb
0.5 ppb
0.5 ppb
0.5 ppb
0.5 ppb
0.5 ppb
0.5 ppb
0.5 ppb
CO
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.3 ppb
0.3 ppb
O3
47.3 ppb
48.2 ppb
49.2 ppb
50.2 ppb
51.2 ppb
52.1 ppb
25.3 ppb
24 ppb
22.9 ppb