Lake Hiawatha, NJ Weather & Growing Conditions
Tonight
49°F
Partly Cloudy
Partly cloudy, with a low around 49. Southwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Partly Cloudy | 5 mph SW | 3% |
| Wednesday | 73°F | Patchy Fog then Sunny | 0 to 10 mph SW | 3% |
| Wednesday Night | 57°F | Mostly Cloudy | 5 mph S | 2% |
| Thursday | 70°F | Chance Light Rain | 5 to 10 mph S | 44% |
| Thursday Night | 60°F | Light Rain Likely | 0 to 5 mph S | 70% |
| Friday | 68°F | Light Rain | 0 to 5 mph SW | 75% |
| Friday Night | 52°F | Light Rain | 0 to 5 mph N | 75% |
| Saturday | 65°F | Chance Light Rain | 0 to 5 mph NW | 42% |
| Saturday Night | 41°F | Slight Chance Light Rain | 5 mph NW | 16% |
| Sunday | 60°F | Mostly Sunny | 5 mph W | 14% |
| Sunday Night | 38°F | Partly Cloudy then Slight Chance Light Rain | 5 mph W | 17% |
| Monday | 60°F | Slight Chance Light Rain | 5 to 10 mph NW | 22% |
| Monday Night | 38°F | Slight Chance Light Rain | 5 mph W | 21% |
| Tuesday | 61°F | Slight Chance Light Rain then Mostly Sunny | 5 to 15 mph W | 18% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lake Hiawatha, NJ
Last spring frost
Apr 17
First fall frost
Oct 23
Growing season
189 days
Hardiness zone
7a
Explore more for Lake Hiawatha, NJ: full frost dates · planting calendar · New Jersey frost dates
Climate data from the nearest NOAA station, Boonton 1 Se, Nj (1.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.