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Shaded-relief atlas plate of Loudon, New Hampshire: rivers, roads, the city limits and where the water drains.
NEW HAMPSHIRE · MERRIMACK COUNTY

Loudon

711 people, 400 ft above sea level in Merrimack County.

400 ftElevation, city center
711People, 2024 estimate
2 sq miLand area
Sunny 65°
Sunny now Dew point 58° · W 5 mph · high 62°
City of Loudon River Interstate 2 miles
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The Loudon 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 Loudon

NWS forecast and National Blend of Models · updated 6:00 PM EDT
RIGHT NOW Concord Municipal Airport (KCON) · 5:51 PM
Sunny
65° Sunny Feels like 65° · high of 62° near 6 PM
WindW 5 mphno gusts
Humidity78%rising to 100% by morning
Pressure29.95 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 58° · Comfortableabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Partly cloudy
Friday, about 3 PMin about 68 hours · 34% chance · showers
LIKELY AMOUNT0–0.2 inmost likely 0; 1 in 10 over 0.6
LAST RAINSept. 270.33 in · 2 dry days
ALERTS & OUTLOOKS
No watches or warnings for Merrimack County
NWS Gray and the Storm Prediction Center · checked 6:46 PM
SUN & MOON
↑ 6:40 AM6:31 PM ↓
11 h 50 m of daylight, 3 minutes less than yesterday
Waning gibbous, 88% lit. The Harvest Moon was full Saturday.
AIR & POLLEN
8
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
6p
9p
Mid
3a
6a
9a
Noon
3p
6p
9p
Mid
3a
6a
9a
Noon
3p
6p
9p
Mid
3a
6a
9a
Noon
3p
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy night
fog
mostly cloudy day
partly cloudy day
partly cloudy day
partly cloudy night
partly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy day
partly cloudy day
partly cloudy day
partly cloudy day
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy day
partly cloudy day
partly cloudy day
showers day
TEMPERATURE °F
62°
52°
71°
55°
77°
64°
CHANCE OF RAIN
34% · 0.00 in Friday afternoon 50%
WIND, MPH
5
0
0
0
0
0
0
0
0
0
0
0
0
2
7
8
7
5
5
5
4
6
9
10
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 68° / 44°
TUE Sept. 29 Mostly cloudy Mostly cloudy
62° 50°
0% rain — NW 5 A
WED Sept. 30 Partly cloudy; warmer Partly cloudy; warmer
74° 52°
0% rain — W 0 B
THU Oct. 1 Partly cloudy Partly cloudy
80° 62°
0% rain — SW 5 B
FRI Oct. 2 Chance of showers Chance of showers
81° 52°
30% rain up to 0.2″ W 7 C
SAT Oct. 3 Mostly sunny; cooler Mostly sunny; cooler
69° 38°
0% rain — NNW 5 C
SUN Oct. 4 Chance of showers Chance of showers
66° 41°
30% rain up to 0.2″ SE 5 B
MON Oct. 5 Mostly sunny Mostly sunny
65° 36°
10% rain — NW 9 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 Loudon about 5,000 feet above the ground was over the North Atlantic three days ago, and over the western Atlantic a day ago, about 1,310 miles back along its path. Most of the nine paths traced from around the city agree. It rose from near the ground on the way. 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 Loudon on the Forecast Network

Neighboring plates

Manchester NH · 21 MI 21 miles south Nashua NH · 37 MI 37 miles south Boston MA · 69 MI 69 miles south Worcester MA · 72 MI 72 miles south Springfield MA · 97 MI 97 miles southwest Providence RI · 101 MI 101 miles south
FORECASTCITY
Atlas plate of Loudon, New Hampshire. Explore the plate
NEW HAMPSHIRE · MERRIMACK

Loudon

711 people, 400 ft above sea level in Merrimack County.

400 ftElevation
711People
2 sq miLand
Sunny 65°
SunnyDew point 58°
1

Today in Loudon

NEXT 15 HOURS
Now mostly cloudy day 62° 0%
9p mostly cloudy night 59° 1%
12a mostly cloudy night 56° 1%
3a mostly cloudy night 55° 2%
6a fog 53° 1%
9a mostly cloudy day 57° 0%
Partly cloudy
NEXT RAINFriday about 3 PM · 34%
→
Tue0%
Mostly cloudy Mostly cloudy
50
62
A
Wed0%
Partly cloudy; warmer Partly cloudy; warmer
52
74
B
Thu0%
Partly cloudy Partly cloudy
62
80
B
Fri30%
Chance of showers Chance of showers
52
81
C
Sat0%
Mostly sunny; cooler Mostly sunny; cooler
38
69
C
Sun30%
Chance of showers Chance of showers
41
66
B
Mon10%
Mostly sunny Mostly sunny
36
65
C
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
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