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
6 mph
Light
6 mph
Light
6 mph
Light
6 mph
Light
6 mph
Light
6 mph
Light
6 mph
Light
Humidity
63%
Humid
62%
Humid
60%
Comfortable
60%
Humid
61%
Humid
63%
Humid
64%
Humid
64%
Humid
65%
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
1037 hPa
Extremely high
1038 hPa
Extremely high
1037 hPa
Extremely high
1036 hPa
Extremely high
1036 hPa
Extremely high
1036 hPa
Extremely high
1035 hPa
Very high
1034 hPa
Very high
1033 hPa
Very high
Clouds
8%
8%
18%
86%
100%
100%
98%
100%
96%
Dew point
12°
13°
13°
14°
15°
17°
19°
20°
21°
UV Index
0
0
1
1
1
0
0
0
0
Air quality
30
Good
28
Good
28
Good
29
Good
30
Good
30
Good
30
Good
29
Good
31
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
0.22 μg/ft3
0.20 μg/ft3
0.18 μg/ft3
0.17 μg/ft3
0.16 μg/ft3
0.17 μg/ft3
0.18 μg/ft3
0.19 μg/ft3
0.22 μg/ft3
PM25
0.86 μg/ft3
0.80 μg/ft3
0.71 μg/ft3
0.65 μg/ft3
0.63 μg/ft3
0.65 μg/ft3
0.69 μg/ft3
0.75 μg/ft3
0.87 μg/ft3
NO2
6.9 ppb
6.4 ppb
6.7 ppb
7 ppb
7.2 ppb
9.2 ppb
11.2 ppb
13.2 ppb
15.2 ppb
SO2
1.1 ppb
1.2 ppb
1.4 ppb
1.6 ppb
1.8 ppb
1.8 ppb
1.9 ppb
2 ppb
1.7 ppb
CO
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
0.2 ppb
O3
26.6 ppb
27 ppb
27.8 ppb
28.7 ppb
29.8 ppb
30.1 ppb
29.9 ppb
29.3 ppb
28.1 ppb