Chatham, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chatham, a borough in Union County, New Jersey.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. East wind 0 to 3 mph.
7-day forecast for Chatham
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 0 to 3 mph E | 0% |
| Tonight | 64°F | Mostly Cloudy | 0 to 3 mph SE | 2% |
| Wednesday | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 40% |
| Wednesday Night | 70°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 3 mph S | 35% |
| Thursday | 88°F | Chance Rain Showers then Chance Showers And Thunderstorms | 1 to 8 mph SW | 43% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 2 to 7 mph SW | 44% |
| Friday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph SW | 46% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 2 to 6 mph W | 46% |
| Saturday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 8 mph W | 39% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 1 to 7 mph W | 39% |
| Sunday | 88°F | Mostly Sunny | 1 to 7 mph W | 12% |
| Sunday Night | 71°F | Mostly Clear | 2 to 6 mph SW | 12% |
| Monday | 89°F | Sunny | 2 to 9 mph W | 11% |
| Monday Night | 70°F | Partly Cloudy | 3 to 8 mph W | 12% |
Forecast source: National Weather Service (api.weather.gov) for Chatham (40.741, -74.384). Updated through the day.
Growing snapshot for Chatham
Last spring frost
Apr 18
First fall frost
Oct 27
Growing season
189 days
Hardiness zone
7a
More local growing data for Chatham: nearby ZIP 07901 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Connecticut Farms
Cranford
Elizabeth
Fanwood
Garwood
Kean University
Kenilworth
Linden
Mountainside
New Providence
North Plainfield
Plainfield
Rahway
Roselle
Roselle Park
Summit
Union
Vauxhall
Westfield
Climate data from the nearest NOAA station, Canoe Brook, Nj (2.1 mi from Chatham). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.