Trenton, New Jersey Climate by Month
Trenton, New Jersey, United States
Hot summers and cold winters, with rain spread through the year.
The climate in Trenton is one of hot summers and cold winters, with rain spread through the year. Expect highs of 89°F (31°C) in July and 42°F (5°C) in January, with the coldest nights (January) near 25°F (-4°C). It gets 46 in (1174 mm) of rain a year, spread across the months.
- Warmest month
- 89°F(31°C)
- Average high, July
- Coldest nights
- 25°F(-4°C)
- Average low, January
- Rain per year
- 46 in(1174 mm)
- No clear rainy season
- Humidity
- 63%
- Sunniest: July
Best and worst months in Trenton
Best for weatherMay is the best time for weather in Trenton: highs near 75°F (24°C) and about 3.5 in (90 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 42°F (5°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Trenton weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 42°F(5°C) | 25°F(-4°C) | 3.4 in(87 mm) | 63% | 1.8 |
| FebFebruary | 44°F(7°C) | 26°F(-3°C) | 2.8 in(70 mm) | 58% | 2.8 |
| MarMarch | 53°F(12°C) | 32°F(0°C) | 4.1 in(105 mm) | 54% | 3.6 |
| AprApril | 65°F(18°C) | 42°F(5°C) | 3.5 in(90 mm) | 58% | 4.6 |
| MayMayBest | 75°F(24°C) | 51°F(11°C) | 3.5 in(90 mm) | 61% | 5.3 |
| JunJune | 84°F(29°C) | 61°F(16°C) | 4.6 in(116 mm) | 66% | 5.7 |
| JulJuly | 89°F(31°C) | 66°F(19°C) | 4.6 in(118 mm) | 66% | 5.7 |
| AugAugust | 87°F(30°C) | 64°F(18°C) | 4.4 in(111 mm) | 66% | 5.0 |
| SepSeptember | 80°F(27°C) | 57°F(14°C) | 4.2 in(106 mm) | 67% | 4.1 |
| OctOctober | 68°F(20°C) | 45°F(7°C) | 3.8 in(97 mm) | 70% | 2.9 |
| NovNovember | 57°F(14°C) | 36°F(2°C) | 3.2 in(81 mm) | 65% | 2.1 |
| DecDecember | 46°F(8°C) | 29°F(-2°C) | 4.1 in(103 mm) | 66% | 1.6 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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