Weather Tomorrow

Weather Tomorrow for ZIP 03801

Portsmouth, NH · View full Portsmouth forecast

Monday, September 21, 2026

67°Low 52°FColdHot
Cloudy

Precip chance

51%

Wind

0-10 mph

Humidity

81%

Feels like

65–54°F

Rain forecast

Rain likely starts around 4 AM and may continue until 4 AM. Peak chance: 51% around 4 AM.

Data source: National Weather Service (NOAA) · Updated just now

Tomorrow by Hour

52°Temperature trend67°
TimeTempConditionRain %Wind
4 AM56°FAreas Of Fog
51%
5 mph N
5 AM56°FAreas Of Fog
36%
5 mph N
6 AM55°FChance Rain Showers
29%
5 mph N
7 AM56°FSlight Chance Rain Showers
16%
5 mph N
8 AM54°FCloudy
4%
5 mph N
9 AM54°FCloudy
0%
10 mph N
10 AM52°FCloudy
0%
5 mph N
11 AM53°FMostly Cloudy
0%
5 mph N
12 PM54°FPartly Sunny
0%
10 mph N
1 PM58°FMostly Sunny
0%
10 mph N
2 PM60°FMostly Sunny
0%
10 mph N
3 PM63°FSunny
0%
10 mph N
4 PM65°FMostly Sunny
0%
10 mph N
5 PM66°FMostly Sunny
0%
10 mph N
6 PM67°FMostly Sunny
0%
5 mph N
7 PM67°FPartly Sunny
0%
10 mph NE
8 PM66°FMostly Sunny
0%
10 mph N
9 PM65°FMostly Sunny
0%
10 mph NE
10 PM64°FPartly Cloudy
0%
10 mph N
11 PM60°FPartly Cloudy
0%
0 mph
12 AM58°FPartly Cloudy
0%
0 mph
1 AM57°FMostly Cloudy
0%
0 mph
2 AM55°FMostly Cloudy
0%
0 mph
3 AM54°FMostly Cloudy
0%
5 mph N

Precipitation Timeline

100%
50%
51%
4a10a4p10p
<20%20-50%50-70%>70%

What to Wear Tomorrow

Warm and comfortable — dress light

Clothing

  • T-shirt or light blouse
  • Shorts or light pants

Footwear

Comfortable shoes or sandals

Accessories

  • Umbrella

Conditions

High: 67°F

Low: 52°F

Wind: 0-10 mph

Rain: 51%

Rain expected around 4 AM — carry an umbrella.

Best Time to Be Outside Tomorrow

6 PM – 7 PM95

Excellent conditions for outdoor activities (dry, comfortable temp, light wind, daylight)

4a10a4p10p