Lebanon, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lebanon, a city in Grafton County, New Hampshire.
Tonight
45°F
Partly Cloudy
Partly cloudy, with a low around 45. Southeast wind 0 to 5 mph.
7-day forecast for Lebanon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 45°F | Partly Cloudy | 0 to 5 mph SE | 0% |
| Sunday | 54°F | Rain | 5 mph SE | 100% |
| Sunday Night | 45°F | Rain then Patchy Fog | 0 to 5 mph NE | 77% |
| Monday | 64°F | Patchy Fog then Mostly Sunny | 5 mph N | 0% |
| Monday Night | 40°F | Mostly Cloudy | 0 to 5 mph N | 0% |
| Tuesday | 64°F | Partly Sunny | 0 to 5 mph NE | 0% |
| Tuesday Night | 41°F | Partly Cloudy | 0 mph | 0% |
| Wednesday | 64°F | Mostly Sunny | 0 to 5 mph E | 1% |
| Wednesday Night | 40°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 64°F | Mostly Sunny then Slight Chance Rain Showers | 0 to 5 mph NE | 16% |
| Thursday Night | 42°F | Chance Rain Showers | 0 mph | 33% |
| Friday | 64°F | Chance Rain Showers | 0 to 5 mph N | 33% |
| Friday Night | 45°F | Chance Rain Showers | 5 mph N | 35% |
| Saturday | 66°F | Chance Rain Showers | 5 mph N | 34% |
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 Sep 20, 2026.