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Weather in Mendham Township, NJ · National Weather Service + NOAA

Mendham Township stays cool in summer

Mendham Township has chilly winters and pleasant summers, with plenty of rain. A typical July afternoon reaches 84°, a January night drops to 20°, and about 30 inches of snow falls in a normal winter. Normal November highs come to 52°, and lows to 34°.

Winter 40°/22°Spring 60°/38°Summer 82°/60°Fall 63°/43°
Right now
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Sunrise 6:31 am · sunset 4:52 pm

Getting the latest forecast from the National Weather Service…

What stands out about Mendham Township’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
Cool summersJuly afternoons average 84°, cooler than 830 of 941 New Jersey towns.Warming faster than mostThe last 30 years averaged 2.1° warmer than the 1900s, a bigger shift than 96% of U.S. towns.A wet climate51 inches of rain and melted snow a year, more than 90% of U.S. towns.
A normal year

Where today sits in Mendham Township’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
40° / 22°
9 days with an inch or more of snow
Spring
60° / 38°
Last frost around Apr 17
Summer
82° / 60°
16 days reach 90° in a normal year
Fall now
63° / 43°
First frost around Oct 23
Pastthe usual first frost (Oct 23). Last frost next spring: Apr 17
Best months to be outside
MayJunJulAugSepOct
Highs of 62–84° and lows of 40° or more
How much snow does Mendham Township get?About 30 inches a winter.When is it wettest?July, with 4.9 inches.Is it warmer than it used to be?+2.1° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in Mendham Township.

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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Mendham Township itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Pottersville 2 Nnw, NJ (10 mi, snow) and Boonton 1 Se, NJ (11 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.