Bethlehem, NH Weather & Growing Conditions
Today
71°F
Partly Sunny
Partly sunny. High near 71, with temperatures falling to around 63 in the afternoon. West wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Partly Sunny | 0 to 5 mph W | 3% |
| Tonight | 49°F | Partly Cloudy | 0 mph | 2% |
| Thursday | 65°F | Light Rain | 5 mph S | 88% |
| Thursday Night | 50°F | Light Rain | 0 to 5 mph SW | 77% |
| Friday | 63°F | Chance Light Rain then Mostly Cloudy | 0 mph | 51% |
| Friday Night | 46°F | Light Rain Likely | 0 mph | 68% |
| Saturday | 57°F | Light Rain Likely | 0 mph | 57% |
| Saturday Night | 36°F | Light Rain Likely | 0 to 5 mph N | 57% |
| Sunday | 48°F | Chance Light Rain | 0 to 5 mph NW | 43% |
| Sunday Night | 30°F | Mostly Cloudy then Chance Light Rain | 0 to 5 mph W | 26% |
| Monday | 43°F | Chance Light Rain | 5 to 10 mph W | 39% |
| Monday Night | 26°F | Slight Chance Rain And Snow | 5 to 10 mph W | 33% |
| Tuesday | 46°F | Partly Sunny then Chance Light Rain | 5 to 10 mph SW | 30% |
| Tuesday Night | 25°F | Chance Rain And Snow | 5 to 10 mph W | 32% |
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 Nov 4, 2026.