Lebanon, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lebanon, a city in Grafton County, New Hampshire.
Overnight
47°F
Partly Cloudy
Partly cloudy, with a low around 47. South wind around 0 mph.
7-day forecast for Lebanon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Partly Cloudy | 0 mph | 2% |
| Wednesday | 73°F | Mostly Sunny | 0 to 5 mph S | 2% |
| Wednesday Night | 52°F | Partly Cloudy | 5 mph S | 1% |
| Thursday | 67°F | Light Rain | 5 mph S | 83% |
| Thursday Night | 55°F | Chance Light Rain | 0 to 5 mph SW | 48% |
| Friday | 67°F | Chance Light Rain | 0 mph | 26% |
| Friday Night | 50°F | Light Rain Likely | 0 mph | 61% |
| Saturday | 60°F | Chance Light Rain | 0 to 5 mph N | 48% |
| Saturday Night | 42°F | Chance Light Rain | 0 to 5 mph NW | 43% |
| Sunday | 54°F | Chance Light Rain then Mostly Cloudy | 5 mph NW | 35% |
| Sunday Night | 34°F | Partly Cloudy then Slight Chance Light Rain | 5 mph W | 15% |
| Monday | 50°F | Slight Chance Light Rain | 5 to 10 mph W | 22% |
| Monday Night | 30°F | Partly Cloudy | 5 mph W | 14% |
| Tuesday | 53°F | Mostly Sunny | 5 to 10 mph SW | 10% |
Forecast source: National Weather Service (api.weather.gov) for Lebanon (43.635, -72.254). Updated through the day.
Growing snapshot for Lebanon
Last spring frost
May 9
First fall frost
Oct 6
Growing season
148 days
Hardiness zone
5a
More local growing data for Lebanon: nearby ZIP 03766 weather · frost dates · planting calendar · New Hampshire frost dates
Nearby towns & communities
Ashland
Bethlehem
Bristol
Canaan
Enfield
Lincoln
Lisbon
Littleton
Mountain Lakes
North Haverhill
North Woodstock
Plymouth
Woodsville
Climate data from the nearest NOAA station, Lebanon Muni Ap, Nh (3.5 mi from Lebanon). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.