Weather Forecast for Portsmouth (US)
New Hampshire, United States of America
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Current Weather - Portsmouth (US): 29°C
Current Weather - Portsmouth (US): 29°C
New Hampshire, United States of America
Partly cloudy
Feels like 32°C
Wind
4 km/h ESE
Humidity
62%
Pressure
1005 mb
UV Index
4
Visibility
16 km
Sunny
Thursday, June 11, 2026
High
32°C
Low
21°C
Rain Chance
12%
Hourly Forecast
26°C
25°C
24°C
24°C
23°C
Day Statistics
Maximum Wind
11 km/h
Humidity
79%
Precipitation
0 mm
UV Index
6
Visibility
6 km
Rain Chance
12%
Snow Chance
0%
Sun & Moon
Sunrise
05:03 AM
Sunset
08:22 PM
Moonrise
02:01 AM
Moonset
04:26 PM
Moon Phase
Waning Crescent
Moon Illumination
8%
Air Quality
PM2.5
7.8
μg/m³
PM10
8.5
μg/m³
NO₂
4.5
μg/m³
O₃
91.1
μg/m³
SO₂
0.7
μg/m³
CO
172
μg/m³
Patchy rain nearby
Friday, June 12, 2026
High
24°C
Low
16°C
Rain Chance
67%
Hourly Forecast
21°C
19°C
19°C
18°C
18°C
18°C
18°C
19°C
21°C
22°C
23°C
23°C
23°C
23°C
22°C
22°C
21°C
20°C
19°C
18°C
17°C
16°C
16°C
16°C
Day Statistics
Maximum Wind
15 km/h
Humidity
89%
Precipitation
1 mm
UV Index
7
Visibility
6 km
Rain Chance
67%
Snow Chance
0%
Sun & Moon
Sunrise
05:03 AM
Sunset
08:22 PM
Moonrise
02:27 AM
Moonset
05:42 PM
Moon Phase
New Moon
Moon Illumination
3%
Air Quality
PM2.5
5
μg/m³
PM10
5.7
μg/m³
NO₂
3
μg/m³
O₃
85.6
μg/m³
SO₂
0.5
μg/m³
CO
200.2
μg/m³
Patchy rain nearby
Saturday, June 13, 2026
High
26°C
Low
15°C
Rain Chance
66%
Hourly Forecast
16°C
16°C
16°C
16°C
16°C
16°C
17°C
17°C
18°C
19°C
21°C
23°C
24°C
25°C
25°C
24°C
24°C
22°C
21°C
19°C
18°C
17°C
16°C
15°C
Day Statistics
Maximum Wind
11 km/h
Humidity
85%
Precipitation
2 mm
UV Index
9
Visibility
6 km
Rain Chance
66%
Snow Chance
0%
Sun & Moon
Sunrise
05:03 AM
Sunset
08:23 PM
Moonrise
03:01 AM
Moonset
07:01 PM
Moon Phase
New Moon
Moon Illumination
1%
Air Quality
PM2.5
3.3
μg/m³
PM10
3.8
μg/m³
NO₂
2
μg/m³
O₃
77.4
μg/m³
SO₂
0.4
μg/m³
CO
145.5
μg/m³
Partly Cloudy
Sunday, June 14, 2026
High
25°C
Low
15°C
Rain Chance
17%
Hourly Forecast
15°C
15°C
15°C
15°C
15°C
15°C
16°C
17°C
19°C
21°C
23°C
24°C
24°C
25°C
24°C
24°C
24°C
24°C
23°C
23°C
23°C
23°C
23°C
22°C
Day Statistics
Maximum Wind
27 km/h
Humidity
72%
Precipitation
0 mm
UV Index
8
Visibility
7 km
Rain Chance
17%
Snow Chance
0%
Sun & Moon
Sunrise
05:03 AM
Sunset
08:23 PM
Moonrise
03:45 AM
Moonset
08:16 PM
Moon Phase
New Moon
Moon Illumination
0%
Air Quality
PM2.5
5.3
μg/m³
PM10
6.1
μg/m³
NO₂
3.1
μg/m³
O₃
88.6
μg/m³
SO₂
0.5
μg/m³
CO
146.7
μg/m³
Patchy rain nearby
Monday, June 15, 2026
High
25°C
Low
16°C
Rain Chance
17%
Hourly Forecast
21°C
20°C
19°C
19°C
18°C
18°C
18°C
19°C
20°C
21°C
22°C
23°C
24°C
25°C
24°C
24°C
23°C
23°C
21°C
19°C
18°C
17°C
16°C
16°C
Day Statistics
Maximum Wind
18 km/h
Humidity
68%
Precipitation
0 mm
UV Index
2
Visibility
10 km
Rain Chance
17%
Snow Chance
0%
Sun & Moon
Sunrise
05:03 AM
Sunset
08:24 PM
Moonrise
04:43 AM
Moonset
09:21 PM
Moon Phase
New Moon
Moon Illumination
2%
Air Quality
PM2.5
4.6
μg/m³
PM10
5.7
μg/m³
NO₂
2.7
μg/m³
O₃
96.3
μg/m³
SO₂
0.6
μg/m³
CO
148.7
μg/m³
Patchy rain nearby
Tuesday, June 16, 2026
High
24°C
Low
14°C
Rain Chance
36%
Hourly Forecast
15°C
15°C
14°C
14°C
14°C
15°C
16°C
17°C
19°C
20°C
22°C
22°C
23°C
24°C
23°C
22°C
21°C
20°C
19°C
18°C
18°C
17°C
16°C
16°C
Day Statistics
Maximum Wind
21 km/h
Humidity
64%
Precipitation
0 mm
UV Index
4
Visibility
9 km
Rain Chance
36%
Snow Chance
0%
Sun & Moon
Sunrise
05:03 AM
Sunset
08:24 PM
Moonrise
05:54 AM
Moonset
10:14 PM
Moon Phase
Waxing Crescent
Moon Illumination
6%
Patchy rain nearby
Wednesday, June 17, 2026
High
21°C
Low
15°C
Rain Chance
53%
Hourly Forecast
15°C
15°C
15°C
15°C
15°C
15°C
15°C
15°C
16°C
17°C
18°C
18°C
19°C
20°C
20°C
20°C
19°C
19°C
18°C
18°C
17°C
17°C
17°C
16°C
Day Statistics
Maximum Wind
19 km/h
Humidity
85%
Precipitation
1 mm
UV Index
4
Visibility
7 km
Rain Chance
53%
Snow Chance
0%
Sun & Moon
Sunrise
05:03 AM
Sunset
08:24 PM
Moonrise
07:15 AM
Moonset
10:54 PM
Moon Phase
Waxing Crescent
Moon Illumination
11%
Solar Radiation Data
Shortwave Radiation
728.53
Diffuse Radiation
176.63
DNI
985.47
GTI
584.9
Weather Alerts
Heat Advisory issued June 11 at 2:24AM EDT until June 11 at 8:00PM EDT by NWS Gray ME
* WHAT...Heat index values up to 97 expected. * WHERE...Western and Central Hillsborough, Belknap, Merrimack, Strafford, Sullivan, Southern Grafton, Cheshire, Eastern Hillsborough, and Interior Rockingham Counties. * WHEN...From noon today to 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...It will remain warm tonight as overnight lows only dip into the mid 60s to lower 70s.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Heat Advisory issued June 11 at 7:54AM EDT until June 12 at 8:00PM EDT by NWS Boston/Norton MA
* WHAT...Heat index values up to 98 expected. * WHERE...Portions of central, eastern, northeastern, and southeastern Massachusetts and northern Rhode Island. * WHEN...From noon today to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
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