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July is the hottest month in Newark NJ, with an average high of 87°F / 31°C; January is the coldest (40°F / 5°C). July is the wettest month, averaging 4.6 in / 118 mm of precipitation.
| Month | High °F / °C | Low °F / °C | Precip in / mm | Wet days |
|---|---|---|---|---|
| Jan | 40 / 5 | 26 / -3 | 3.4 / 87 | 8 |
| Feb | 43 / 6 | 28 / -2 | 3.0 / 76 | 7 |
| Mar | 51 / 11 | 34 / 1 | 4.1 / 105 | 9 |
| Apr | 63 / 17 | 44 / 7 | 3.9 / 98 | 9 |
| May | 73 / 23 | 54 / 12 | 4.0 / 101 | 9 |
| Jun | 82 / 28 | 64 / 18 | 4.3 / 110 | 9 |
| Jul | 87 / 31 | 70 / 21 | 4.6 / 118 | 8 |
| Aug | 85 / 30 | 68 / 20 | 4.1 / 105 | 8 |
| Sep | 78 / 26 | 61 / 16 | 3.8 / 97 | 7 |
| Oct | 66 / 19 | 49 / 10 | 3.8 / 96 | 7 |
| Nov | 55 / 13 | 39 / 4 | 3.3 / 85 | 7 |
| Dec | 45 / 7 | 31 / 0 | 4.1 / 105 | 9 |
Extremes since 1843: highest 108°F / 42°C (July 22, 2011), lowest -14°F / -26°C (February 9, 1934).
Daylight lasts about 14.9 hours in June and 9.1 hours in December.
Data: Meteostat — Newark Airport, 1991–2020 averages.
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