FORECAST CITY
Sign in
Shaded-relief atlas plate of Londonderry, New Hampshire: rivers, roads, the city limits and where the water drains.
NEW HAMPSHIRE · ROCKINGHAM COUNTY

Londonderry

11,645 people, 340 ft above sea level in Rockingham County.

340 ftElevation, city center
11,645People, 2024 estimate
12 sq miLand area
Sunny 67°
Sunny now Dew point 55° · NW 6 mph · high 68°
City of Londonderry River Interstate 2 miles
Explore the plate Order a print

The Londonderry plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.

MILE1
TODAY

Today in Londonderry

NWS forecast and National Blend of Models · updated 1:00 PM EDT
RIGHT NOW Manchester Airport (KMHT) · 1:53 PM
Sunny
67° Sunny Feels like 67° · high of 68° near 3 PM
WindNW 6 mphno gusts
Humidity66%falling to 63% this afternoon
Pressure29.93 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 55° · Comfortableabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Partly cloudy
Friday, about 9 AMin about 66 hours · 36% chance · showers
LIKELY AMOUNT0–0.1 inmost likely 0.04; 1 in 10 over 0.6
LAST RAINSept. 270.42 in · 2 dry days
ALERTS & OUTLOOKS
No watches or warnings for Rockingham County
NWS Gray and the Storm Prediction Center · checked 2:50 PM
SUN & MOON
↑ 6:40 AM6:31 PM ↓
11 h 51 m of daylight, 3 minutes less than yesterday
Waning gibbous, 89% lit. The Harvest Moon was full Saturday.
AIR & POLLEN
18
GOODAir quality index · ozone
Tomorrow: None, good. No pollen source yet.

The next three days, hour by hour

Sky: clear, cloudy, night Rain likely National Blend of Models
TUESDAY, SEPT. 29
WEDNESDAY, SEPT. 30
THURSDAY, OCT. 1
FRIDAY, OCT. 2
2p
5p
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
mostly cloudy day
partly cloudy day
partly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy night
partly cloudy day
partly cloudy day
partly cloudy day
partly cloudy night
partly cloudy night
partly cloudy night
mostly cloudy night
partly cloudy night
partly cloudy day
mostly sunny
partly cloudy day
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
showers day
showers day
TEMPERATURE °F
67°
53°
70°
55°
77°
64°
CHANCE OF RAIN
36% · 0.00 in Friday morning 50%
WIND, MPH
7
5
5
0
0
0
0
0
0
1
2
0
0
0
2
7
10
9
8
7
5
5
5
7
HOW IT FEELS · DEW POINT
Comfortable: dew points 52 to 61°

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 69° / 49°
TUE Sept. 29 Mostly cloudy Mostly cloudy
68° 53°
0% rain — NNW 6 A
WED Sept. 30 Partly cloudy Partly cloudy
73° 55°
0% rain — NNW 0 B
THU Oct. 1 Partly cloudy Partly cloudy
80° 64°
0% rain — SW 6 B
FRI Oct. 2 Chance of showers Chance of showers
81° 55°
40% rain up to 0.1″ W 10 C
SAT Oct. 3 Mostly sunny; cooler Mostly sunny; cooler
70° 44°
10% rain — N 6 B
SUN Oct. 4 Chance of showers Chance of showers
66° 45°
40% rain up to 0.7″ ESE 7 C
MON Oct. 5 Mostly sunny Mostly sunny
65° 39°
10% rain — NW 12 C
How sure are we? AModels agree: highs within 4° BSome spread: within 8° CWide spread: check back
Range from the National Blend of Models percentiles · graded on Forecast Scores
AIR MAIL

Where today’s air came from

The air arriving over Londonderry about 5,000 feet above the ground was over the western Atlantic three days ago, about 2,060 miles back along its path. The nine paths traced from around the city fan out, so treat that as a best guess. Near the ground the air came from Canada; at 10,000 feet, from the western Atlantic. Traced back 72 hours through NOAA’s hourly RAP analyses and the GFS beyond them, nine paths at each of three heights.

MILE7
ON THE NETWORK

Around Londonderry on the Forecast Network

Neighboring plates

Cambridge MA · 35 MI 35 miles south Boston MA · 40 MI 40 miles southeast Worcester MA · 46 MI 46 miles southwest Providence RI · 71 MI 71 miles south Springfield MA · 79 MI 79 miles southwest New Haven CT · 133 MI 133 miles southwest
FORECASTCITY
Atlas plate of Londonderry, New Hampshire. Explore the plate
NEW HAMPSHIRE · ROCKINGHAM

Londonderry

11,645 people, 340 ft above sea level in Rockingham County.

340 ftElevation
11,645People
12 sq miLand
Sunny 67°
SunnyDew point 55°
1

Today in Londonderry

NEXT 15 HOURS
Now mostly cloudy day 67° 1%
5p mostly cloudy day 67° 2%
8p partly cloudy night 61° 2%
11p mostly cloudy night 58° 1%
2a mostly cloudy night 55° 1%
5a mostly cloudy night 54° 0%
Partly cloudy
NEXT RAINFriday about 9 AM · 36%
→
Tue0%
Mostly cloudy Mostly cloudy
53
68
A
Wed0%
Partly cloudy Partly cloudy
55
73
B
Thu0%
Partly cloudy Partly cloudy
64
80
B
Fri40%
Chance of showers Chance of showers
55
81
C
Sat10%
Mostly sunny; cooler Mostly sunny; cooler
44
70
B
Sun40%
Chance of showers Chance of showers
45
66
C
Mon10%
Mostly sunny Mostly sunny
39
65
C
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
·