Loudon, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Loudon, a community in Merrimack County, New Hampshire.
Overnight
43°F
Partly Cloudy
Partly cloudy, with a low around 43. Northwest wind 0 to 5 mph.
7-day forecast for Loudon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 43°F | Partly Cloudy | 0 to 5 mph NW | 0% |
| Saturday | 65°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 44°F | Partly Cloudy | 0 to 5 mph SE | 0% |
| Sunday | 60°F | Rain Showers | 0 to 5 mph SE | 82% |
| Sunday Night | 47°F | Rain Showers | 0 to 5 mph NE | 80% |
| Monday | 65°F | Mostly Sunny | 5 mph N | 6% |
| Monday Night | 44°F | Mostly Cloudy | 0 to 5 mph N | 2% |
| Tuesday | 61°F | Partly Sunny | 5 mph NE | 2% |
| Tuesday Night | 42°F | Mostly Cloudy | 0 to 5 mph NE | 1% |
| Wednesday | 60°F | Mostly Sunny | 5 to 10 mph NE | 1% |
| Wednesday Night | 42°F | Mostly Cloudy | 0 to 5 mph NE | 9% |
| Thursday | 58°F | Chance Rain Showers | 5 mph NE | 26% |
| Thursday Night | 44°F | Chance Rain Showers | 0 to 5 mph NE | 26% |
| Friday | 63°F | Chance Rain Showers | 5 to 10 mph N | 25% |
Forecast source: National Weather Service (api.weather.gov) for Loudon (43.282, -71.465). Updated through the day.
Growing snapshot for Loudon
Last spring frost
May 8
First fall frost
Oct 3
Growing season
146 days
Hardiness zone
5b
More local growing data for Loudon: nearby ZIP 03307 weather · frost dates · planting calendar · New Hampshire frost dates
Nearby towns & communities
Bradford
Concord
Contoocook
Franklin
Henniker
Hooksett
New London
Pittsfield
Suncook
Tilton Northfield
Warner
Climate data from the nearest NOAA station, Concord Muni Ap, Nh (10 mi from Loudon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.