Bethlehem, NH Weather & Growing Conditions
Today
78°F
Sunny
Sunny, with a high near 78. West wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Sunny | 5 to 10 mph W | 0% |
| Tonight | 56°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Wednesday | 84°F | Mostly Sunny | 0 to 5 mph SW | 0% |
| Wednesday Night | 61°F | Partly Cloudy | 0 to 5 mph S | 5% |
| Thursday | 84°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 mph | 36% |
| Thursday Night | 63°F | Chance Showers And Thunderstorms then Mostly Cloudy | 0 mph | 33% |
| Friday | 83°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph W | 45% |
| Friday Night | 61°F | Chance Showers And Thunderstorms | 0 mph | 44% |
| Saturday | 82°F | Chance Showers And Thunderstorms | 0 mph | 50% |
| Saturday Night | 61°F | Chance Showers And Thunderstorms | 0 mph | 45% |
| Sunday | 84°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 19% |
| Sunday Night | 61°F | Slight Chance Showers And Thunderstorms | 5 mph SW | 21% |
| Monday | 82°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 49% |
| Monday Night | 57°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 48% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Bethlehem, NH
Last spring frost
May 24
First fall frost
Sep 18
Growing season
116 days
Hardiness zone
5a
Explore more for Bethlehem, NH: full frost dates · planting calendar · New Hampshire frost dates
Climate data from the nearest NOAA station, Bethlehem 2, Nh (4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.