Caldwell, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Caldwell, a borough in Essex County, New Jersey.
Overnight
63°F
Partly Cloudy
Partly cloudy. Low around 63, with temperatures rising to around 65 overnight. North wind around 2 mph.
7-day forecast for Caldwell
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Partly Cloudy | 2 mph N | 0% |
| Tuesday | 83°F | Mostly Sunny | 3 mph NE | 0% |
| Tuesday Night | 65°F | Mostly Cloudy | 3 mph NW | 4% |
| Wednesday | 82°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 6 mph E | 39% |
| Wednesday Night | 70°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph S | 35% |
| Thursday | 87°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 2 to 8 mph SW | 44% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 to 7 mph SW | 44% |
| Friday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 to 7 mph SW | 46% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 2 to 6 mph W | 44% |
| Saturday | 86°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 8 mph W | 37% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 2 to 7 mph W | 37% |
| Sunday | 87°F | Mostly Sunny | 2 to 7 mph W | 14% |
| Sunday Night | 71°F | Mostly Clear | 6 mph SW | 14% |
| Monday | 88°F | Mostly Sunny | 3 to 10 mph W | 12% |
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 Aug 4, 2026.