Bethlehem, NH Weather & Growing Conditions
Overnight
35°F
Areas Of Frost
Areas of frost after 4am. Mostly clear, with a low around 35. Northeast wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 35°F | Areas Of Frost | 0 mph | 1% |
| Saturday | 61°F | Areas Of Frost then Sunny | 0 mph | 0% |
| Saturday Night | 36°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Sunday | 55°F | Cloudy then Rain | 0 to 5 mph SE | 94% |
| Sunday Night | 37°F | Rain Likely then Rain Showers Likely | 0 to 5 mph E | 72% |
| Monday | 58°F | Partly Sunny | 5 mph N | 1% |
| Monday Night | 34°F | Mostly Cloudy | 0 to 5 mph N | 0% |
| Tuesday | 61°F | Mostly Sunny | 0 mph | 0% |
| Tuesday Night | 34°F | Partly Cloudy | 0 mph | 0% |
| Wednesday | 63°F | Mostly Sunny | 0 to 5 mph E | 0% |
| Wednesday Night | 34°F | Partly Cloudy | 0 to 5 mph SE | 2% |
| Thursday | 62°F | Slight Chance Rain Showers | 0 mph | 21% |
| Thursday Night | 36°F | Chance Rain Showers | 0 mph | 30% |
| Friday | 63°F | Slight Chance Rain Showers | 0 to 5 mph NE | 24% |
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 Sep 19, 2026.