Mountainside, NJ Weather & Climate Normals
Mountainside's real weather, in one number
Mountainside, NJ scores 42/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 4 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Mountainside's hottest and coldest months
Mountainside's hottest month is Jul, averaging 77°F; its coldest is Jan, averaging 33°F, a 44.1°F swing across the year, a middling gap by national standards.
Mountainside's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 40°F | 25°F | 3.73in | 7in |
| Feb | 43°F | 27°F | 3.26in | 8.2in |
| Mar | 51°F | 33°F | 4.39in | 5in |
| Apr | 63°F | 43°F | 4.05in | 0.3in |
| May | 72°F | 53°F | 4.2in | 0in |
| Jun | 81°F | 62°F | 4.54in | 0in |
| Jul | 86°F | 68°F | 5.32in | 0in |
| Aug | 84°F | 66°F | 4.14in | 0in |
| Sep | 77°F | 59°F | 4.25in | 0in |
| Oct | 66°F | 47°F | 4.4in | 0in |
| Nov | 55°F | 38°F | 3.63in | 0.1in |
| Dec | 45°F | 31°F | 4.48in | 5.7in |
May, Jun, Sep, and Oct are the best time to see Mountainside at its mildest; the rest of the year, plan around Jul's heat and Jan's cold.
Rain and snow in Mountainside
Mountainside averages 50.39in of precipitation a year across roughly 119 days with measurable rain or snow, and 26.3in of snow a year.
Where Mountainside ranks
Mountainside ranks 4295 of 4876 US cities in this dataset for comfort score, and 183 of 194 within NJ. About 7,228 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Cranford, NJ US, 2.2 miles from Mountainside, not a prediction for any specific day.
More on how this is worked out
What a 30-year climate normal actually is · Why this uses the nearest NOAA station