Hourly Weather in Greenwich, Connecticut, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
5 mph
Calm
4 mph
Calm
4 mph
Calm
5 mph
Light
5 mph
Light
6 mph
Light
6 mph
Light
8 mph
Light
8 mph
Light
Humidity
77%
Extremely humid
75%
Extremely humid
74%
Extremely humid
73%
Extremely humid
74%
Extremely humid
73%
Extremely humid
72%
Extremely humid
74%
Extremely humid
74%
Extremely 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
1016 hPa
Normal
1016 hPa
Normal
1016 hPa
Normal
1017 hPa
Normal
1017 hPa
Normal
1017 hPa
Normal
1018 hPa
Normal
1018 hPa
Normal
1017 hPa
Normal
Clouds
100%
100%
98%
100%
100%
100%
100%
100%
100%
Dew point
45°
45°
45°
47°
48°
48°
48°
48°
48°
UV Index
0
0
0
0
0
2
1
1
3
Air quality
27
Good
27
Good
27
Good
25
Good
27
Good
31
Good
31
Good
33
Good
35
Good
Pollen index
Tree
5 / 5
4 / 5
3 / 5
3 / 5
2 / 5
2 / 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
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
0 / 5
0 / 5
0 / 5
Pollutants
Low risk
High risk
PM10
0.27 μg/ft3
0.27 μg/ft3
0.28 μg/ft3
0.25 μg/ft3
0.30 μg/ft3
0.34 μg/ft3
0.31 μg/ft3
0.31 μg/ft3
0.27 μg/ft3
PM25
0.18 μg/ft3
0.18 μg/ft3
0.19 μg/ft3
0.16 μg/ft3
0.19 μg/ft3
0.22 μg/ft3
0.20 μg/ft3
0.20 μg/ft3
0.18 μg/ft3
NO2
1.52 ppb
1.36 ppb
1.2 ppb
1.15 ppb
0.99 ppb
0.69 ppb
0.67 ppb
0.6 ppb
0.43 ppb
SO2
0.11 ppb
0.14 ppb
0.16 ppb
0.17 ppb
0.21 ppb
0.18 ppb
0.28 ppb
0.26 ppb
0.11 ppb
CO
0.14 ppb
0.14 ppb
0.14 ppb
0.13 ppb
0.13 ppb
0.13 ppb
0.12 ppb
0.12 ppb
0.13 ppb
O3
25.37 ppb
27.02 ppb
28.66 ppb
30.38 ppb
32.48 ppb
36.41 ppb
36.68 ppb
37.26 ppb
39.08 ppb