Local weather forecast

Weather in New Castle, NH

Updated 2026-09-26 10:00 local time · ZIP codes 03854

Patchy rain nearby
Now56°F

Patchy rain nearby

High / Low59° / 55°
Rain chance91%
Wind23 mph
Weather alerts

Active alerts

1
Gale Warning issued September 26 at 2:22AM EDT until September 27 at 8:00PM EDT by NWS Gray ME

* WHAT...Northeast winds 20 to 30 kt with gusts up to 45 kt and seas 8 to 13 ft. * WHERE...Coastal Waters from Cape Elizabeth, ME to Merrimack River, MA out 25 NM. * WHEN...Until 8 PM EDT Sunday. * IMPACTS...Strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility.

Safety instructions

Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe conditions.

Hourly

Next hours

NowPatchy rain nearby56°36% rain
11 AMLight rain shower56°43% rain
12 PMLight rain55°71% rain
1 PMLight rain55°75% rain
2 PMLight rain shower56°58% rain
3 PMLight rain shower57°60% rain
4 PMLight rain57°77% rain
5 PMLight rain shower57°74% rain
6 PMLight rain shower57°71% rain
7 PMLight rain shower57°75% rain
8 PMLight rain shower56°76% rain
9 PMLight rain shower56°79% rain
Forecast

3-day weather forecast

Today2026-09-26
Light rain shower
59° 55°Light rain shower
Rain 91%Gust 31 mph
Tomorrow2026-09-27
Light rain shower
58° 56°Light rain shower
Rain 94%Gust 35 mph
Monday2026-09-28
Light rain shower
58° 53°Light rain shower
Rain 94%Gust 26 mph
Conditions

Weather details

Feels like45°F
Humidity87%
Pressure30.02 inHg
Visibility6 mi
Wind23 mph NE
Wind gusts37 mph
Precipitation0.00 in
UV index2
Daylight

Sunrise, sunset and moon

Sunrise06:34 AM
Sunset06:33 PM
Moonrise06:20 PM
Moon phaseFull Moon
Next 24 hours

Key weather changes ahead

Warmest hour6 AM · 57°F
Coolest hour1 PM · 55°F
Highest rain chance4 AM · 86%
Strongest gusts9 AM · 51 mph
Practical guide

Weather insights for today

Take an umbrella

Rain chance reaches about 79% over the next 12 hours.

A jacket or sweater is a good idea

It feels like 45°F with winds near 23 mph.

Best window: 10 AM

56°F, 36% rain chance and 23 mph wind.

Use extra caution while driving

Visibility is around 6 mi; gusts may reach 46 mph.

Running conditions are less comfortable

Current temperature is 56°F, wind 23 mph, rain chance up to 79%.

Low UV protection needs

UV index is 2.

Local weather characteristics in New Castle

New Hampshire has four distinct seasons, cold snowy winters and mild to warm summers. Mountain weather can be much colder and windier than nearby valleys.

New Castle is part of the Northeast weather region. The forecast point is near 43.07°N latitude and 70.72°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.

New Castle weather today

Patchy rain nearby and 56°F in New Castle, NH. Today's high is 59°F with a 91% rain chance. Winds are around 23 mph with gusts near 37 mph. Relative humidity is 87%, pressure is 30.02 inHg, and visibility is about 6 miles.

Tonight and tomorrow in New Castle

Sunrise is at 06:34 AM and sunset is at 06:33 PM. Tomorrow's forecast calls for Light rain shower with a high near 58°F and a low near 56°F. The maximum rain chance is 94%.

Nearby

Weather near New Castle

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