Caldwell, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Caldwell, a borough in Essex County, New Jersey.
Tonight
59°F
Mostly Cloudy then Slight Chance Rain Showers
A slight chance of rain showers after 5am. Mostly cloudy. Low around 59, with temperatures rising to around 61 overnight. Southeast wind around 5 mph. Chance of precipitation is 20%.
7-day forecast for Caldwell
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph SE | 23% |
| Sunday | 71°F | Rain Showers then Rain | 5 to 9 mph SE | 92% |
| Sunday Night | 56°F | Rain then Rain Showers Likely | 3 to 12 mph W | 82% |
| Monday | 67°F | Slight Chance Rain Showers | 8 to 12 mph NE | 21% |
| Monday Night | 52°F | Chance Rain Showers | 9 mph NE | 30% |
| Tuesday | 63°F | Chance Rain Showers | 10 mph NE | 30% |
| Tuesday Night | 50°F | Chance Rain Showers then Mostly Cloudy | 9 to 13 mph NE | 29% |
| Wednesday | 63°F | Mostly Cloudy then Slight Chance Rain Showers | 15 mph NE | 17% |
| Wednesday Night | 50°F | Slight Chance Rain Showers | 14 mph NE | 21% |
| Thursday | 62°F | Chance Rain Showers | 12 to 16 mph NE | 28% |
| Thursday Night | 50°F | Chance Rain Showers | 15 mph NE | 35% |
| Friday | 64°F | Chance Rain Showers | 13 to 17 mph N | 35% |
| Friday Night | 52°F | Chance Rain Showers | 15 mph N | 35% |
| Saturday | 67°F | Chance Rain Showers | 12 to 15 mph N | 30% |
Forecast source: National Weather Service (api.weather.gov) for Caldwell (40.839, -74.277). Updated through the day.
Growing snapshot for Caldwell
Last spring frost
Apr 18
First fall frost
Oct 24
Growing season
187 days
Hardiness zone
7a
More local growing data for Caldwell: nearby ZIP 07021 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Ampere North
East Orange
Essex Fells
Glen Ridge
Llewellyn Park
Newark
North Caldwell
Pleasantdale
Roseland
Short Hills
Silver Lake
Springfield
Upper Montclair
Watsessing
Climate data from the nearest NOAA station, Essex Fells Service Bldg, Nj (0.5 mi from Caldwell). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.