Hourly Weather in South San Francisco, California, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
1 mph
Calm
2 mph
Calm
3 mph
Calm
4 mph
Calm
5 mph
Light
8 mph
Light
9 mph
Light
10 mph
Light
9 mph
Light
Humidity
93%
Extremely humid
94%
Extremely humid
94%
Extremely humid
93%
Extremely humid
90%
Extremely humid
74%
Extremely humid
63%
Humid
48%
Comfortable
44%
Dry
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
1025 hPa
Very high
1025 hPa
Very high
1026 hPa
Very high
1026 hPa
Very high
1026 hPa
Very high
1026 hPa
Very high
1026 hPa
Very high
1025 hPa
Very high
1025 hPa
Very high
Clouds
0%
0%
0%
0%
0%
0%
0%
8%
21%
Dew point
43°
42°
41°
41°
40°
38°
36°
30°
27°
UV Index
0
0
0
0
0
0
0
0
0
Air quality
62
Moderate
64
Moderate
63
Moderate
62
Moderate
60
Moderate
59
Moderate
57
Moderate
51
Moderate
37
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
0.51 μg/ft3
0.53 μg/ft3
0.52 μg/ft3
0.49 μg/ft3
0.47 μg/ft3
0.45 μg/ft3
0.43 μg/ft3
0.34 μg/ft3
0.25 μg/ft3
PM25
1.75 μg/ft3
1.81 μg/ft3
1.79 μg/ft3
1.75 μg/ft3
1.71 μg/ft3
1.68 μg/ft3
1.62 μg/ft3
1.44 μg/ft3
1.05 μg/ft3
NO2
19.6 ppb
19.5 ppb
18.4 ppb
17.3 ppb
16.2 ppb
12.9 ppb
9.6 ppb
6.3 ppb
5.1 ppb
SO2
1.6 ppb
1.6 ppb
1.4 ppb
1.2 ppb
1 ppb
0.8 ppb
0.7 ppb
0.5 ppb
0.5 ppb
CO
0.3 ppb
0.4 ppb
0.3 ppb
0.3 ppb
0.3 ppb
0.3 ppb
0.3 ppb
0.2 ppb
0.2 ppb
O3
3.9 ppb
2.6 ppb
2.1 ppb
1.8 ppb
1.7 ppb
4 ppb
7.5 ppb
11.6 ppb
15.7 ppb