Lake Hiawatha, NJ Weather & Growing Conditions
Tonight
54°F
Partly Cloudy
Partly cloudy, with a low around 54. North wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Partly Cloudy | 5 mph N | 0% |
| Saturday | 71°F | Mostly Sunny | 5 mph E | 0% |
| Saturday Night | 58°F | Mostly Cloudy then Patchy Fog | 0 to 5 mph SE | 39% |
| Sunday | 70°F | Rain Showers | 5 to 10 mph SE | 91% |
| Sunday Night | 57°F | Patchy Fog | 0 to 10 mph SW | 90% |
| Monday | 66°F | Chance Rain Showers | 5 to 10 mph N | 38% |
| Monday Night | 53°F | Chance Rain Showers | 5 to 10 mph NE | 27% |
| Tuesday | 62°F | Chance Rain Showers | 10 mph NE | 31% |
| Tuesday Night | 50°F | Chance Rain Showers | 10 mph NE | 31% |
| Wednesday | 61°F | Slight Chance Rain Showers | 10 to 15 mph NE | 24% |
| Wednesday Night | 50°F | Chance Rain Showers | 10 mph NE | 37% |
| Thursday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Thursday Night | 51°F | Chance Showers And Thunderstorms | 5 to 10 mph N | 34% |
| Friday | 68°F | Chance Rain Showers | 10 mph N | 30% |
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 Sep 19, 2026.