Hourly Weather in Merrimack, New Hampshire, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
7 mph
Light
7 mph
Light
8 mph
Light
8 mph
Light
8 mph
Light
9 mph
Light
10 mph
Breezy
11 mph
Breezy
11 mph
Breezy
Humidity
87%
Extremely humid
88%
Extremely humid
86%
Extremely humid
87%
Extremely humid
86%
Extremely humid
87%
Extremely humid
88%
Extremely humid
88%
Extremely humid
88%
Extremely humid
Visibility
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
9 mi
Good
7 mi
Good
5 mi
Fair
5 mi
Fair
4 mi
Fair
Pressure
998 hPa
Extremely low
999 hPa
Extremely low
999 hPa
Extremely low
998 hPa
Extremely low
999 hPa
Extremely low
999 hPa
Extremely low
999 hPa
Extremely low
1000 hPa
Very low
1000 hPa
Very low
Clouds
78%
99%
63%
68%
100%
100%
100%
100%
100%
Dew point
31°
31°
30°
31°
31°
31°
32°
32°
33°
UV Index
0
0
0
0
0
0
0
0
0
Air quality
28
Good
30
Good
31
Good
30
Good
26
Good
21
Good
21
Good
22
Good
23
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
0.26 μg/ft3
0.27 μg/ft3
0.27 μg/ft3
0.24 μg/ft3
0.18 μg/ft3
0.11 μg/ft3
0.06 μg/ft3
0.03 μg/ft3
0.03 μg/ft3
PM25
0.21 μg/ft3
0.22 μg/ft3
0.22 μg/ft3
0.20 μg/ft3
0.15 μg/ft3
0.09 μg/ft3
0.05 μg/ft3
0.02 μg/ft3
0.02 μg/ft3
NO2
5.31 ppb
5.15 ppb
5 ppb
4.36 ppb
3.73 ppb
3.09 ppb
2.91 ppb
2.73 ppb
2.54 ppb
SO2
0.9 ppb
0.88 ppb
0.86 ppb
0.84 ppb
0.81 ppb
0.78 ppb
0.69 ppb
0.61 ppb
0.52 ppb
CO
0.18 ppb
0.18 ppb
0.17 ppb
0.17 ppb
0.16 ppb
0.15 ppb
0.15 ppb
0.15 ppb
0.15 ppb
O3
21.9 ppb
21.2 ppb
20.5 ppb
21.7 ppb
22.9 ppb
24 ppb
25.1 ppb
26.3 ppb
27.4 ppb