Lebanon, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lebanon, a city in Grafton County, New Hampshire.
Today
83°F
Areas Of Fog then Sunny
Areas of fog before 8am. Sunny, with a high near 83. West wind 0 to 5 mph.
7-day forecast for Lebanon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Areas Of Fog then Sunny | 0 to 5 mph W | 0% |
| Tonight | 58°F | Mostly Clear then Areas Of Fog | 0 to 5 mph S | 0% |
| Wednesday | 86°F | Areas Of Fog then Partly Sunny | 0 to 5 mph SW | 0% |
| Wednesday Night | 65°F | Partly Cloudy | 0 to 5 mph S | 8% |
| Thursday | 88°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 39% |
| Thursday Night | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SW | 34% |
| Friday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 28% |
| Friday Night | 66°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 26% |
| Saturday | 86°F | Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph W | 49% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph W | 42% |
| Sunday | 87°F | Mostly Sunny | 0 to 5 mph W | 10% |
| Sunday Night | 66°F | Mostly Clear | 0 to 5 mph SW | 12% |
| Monday | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph SW | 33% |
| Monday Night | 63°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 32% |
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 Aug 4, 2026.