Chatham, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chatham, a borough in Union County, New Jersey.
Today
72°F
Mostly Sunny
Mostly sunny. High near 72, with temperatures falling to around 70 in the afternoon. East wind around 7 mph.
7-day forecast for Chatham
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Mostly Sunny | 7 mph E | 1% |
| Tonight | 57°F | Mostly Cloudy | 2 to 6 mph SE | 5% |
| Sunday | 70°F | Rain Showers | 3 to 8 mph SE | 93% |
| Sunday Night | 55°F | Showers And Thunderstorms Likely | 3 to 10 mph W | 72% |
| Monday | 67°F | Chance Rain Showers then Partly Sunny | 7 to 12 mph N | 30% |
| Monday Night | 50°F | Mostly Cloudy then Chance Rain Showers | 6 to 9 mph NE | 25% |
| Tuesday | 62°F | Chance Rain Showers | 12 mph NE | 30% |
| Tuesday Night | 49°F | Chance Rain Showers then Mostly Cloudy | 9 to 13 mph NE | 25% |
| Wednesday | 63°F | Slight Chance Rain Showers | 15 mph NE | 23% |
| Wednesday Night | 49°F | Chance Rain Showers | 13 mph NE | 31% |
| Thursday | 62°F | Chance Rain Showers | 13 to 16 mph NE | 33% |
| Thursday Night | 49°F | Chance Rain Showers | 9 to 13 mph N | 36% |
| Friday | 64°F | Chance Rain Showers | 13 mph N | 32% |
| Friday Night | 50°F | Chance Rain Showers | 9 to 13 mph N | 31% |
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 Sep 19, 2026.