Summit, NJ Weather & Climate Normals
What a normal year in Summit actually looks like
On the 30-year record NOAA keeps for Summit, NJ, the comfort score comes out to 42/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 4 months a year land in the 55–75°F range this site treats as mild.
How much Summit's weather actually swings
Average temperatures in Summit run from 31°F in Jan up to 76°F in Jul, a 45.2°F seasonal swing, one of the widest gaps in this dataset.
Summit, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 40°F | 22°F | 3.53in | 5.8in |
| Feb | 42°F | 23°F | 2.96in | 8.4in |
| Mar | 50°F | 31°F | 4.19in | 4.6in |
| Apr | 62°F | 41°F | 4.03in | 0.4in |
| May | 72°F | 50°F | 4.05in | 0in |
| Jun | 82°F | 60°F | 4.77in | 0in |
| Jul | 86°F | 66°F | 4.68in | 0in |
| Aug | 85°F | 64°F | 4.94in | 0in |
| Sep | 78°F | 56°F | 4.64in | 0in |
| Oct | 66°F | 44°F | 4.58in | 0in |
| Nov | 54°F | 35°F | 3.6in | 0.7in |
| Dec | 44°F | 28°F | 4.43in | 4.1in |
If you're timing a visit, May, Jun, Aug, and Sep are Summit's mildest stretch; if you're moving there, you should plan around Jul's heat and Jan's cold instead.
How wet Summit actually gets
Over a typical year, Summit sees about 50.4in of precipitation a year across roughly 123 days with measurable rain or snow, with 24in of snow a year.
Summit against the rest of the country
Out of 4876 cities scored here, Summit comes in at 4201; within NJ alone it ranks 166 of 194. Population is about 23,102.
Checking the actual forecast
These figures come from Canoe Brook, NJ US, the NOAA station 2.0 miles from Summit, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is