Hillsborough Climate by Month
Hillsborough, New Jersey, United States
Hot summers and cold winters, with rain spread through the year.
Hillsborough has hot summers and cold winters, with rain spread through the year. Afternoon highs range from 40°F (4°C) in January to 87°F (30°C) in July, and January nights average 22°F (-5°C). About 47 in (1201 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 87°F(30°C)
- Average high, July
- Coldest nights
- 22°F(-5°C)
- Average low, January
- Rain per year
- 47 in(1201 mm)
- No clear rainy season
- Humidity
- 67%
- Sunniest: July
Best and worst months in Hillsborough
Best for weatherMay and September are the best time for weather in Hillsborough: highs near 76°F (24°C) and about 4.0 in (103 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 40°F (4°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)
Hillsborough weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 40°F(4°C) | 22°F(-5°C) | 3.6 in(91 mm) | 68% | 1.8 |
| FebFebruary | 42°F(6°C) | 23°F(-5°C) | 2.8 in(71 mm) | 63% | 2.8 |
| MarMarch | 51°F(11°C) | 30°F(-1°C) | 4.1 in(104 mm) | 58% | 3.7 |
| AprApril | 63°F(17°C) | 40°F(4°C) | 3.6 in(92 mm) | 62% | 4.6 |
| MayMayBest | 73°F(23°C) | 49°F(9°C) | 3.7 in(95 mm) | 66% | 5.3 |
| JunJune | 82°F(28°C) | 58°F(15°C) | 4.7 in(119 mm) | 68% | 5.8 |
| JulJuly | 87°F(30°C) | 64°F(18°C) | 4.8 in(123 mm) | 67% | 5.8 |
| AugAugust | 85°F(29°C) | 62°F(17°C) | 4.2 in(107 mm) | 71% | 5.1 |
| SepSeptemberBest | 78°F(26°C) | 55°F(13°C) | 4.3 in(110 mm) | 71% | 4.1 |
| OctOctober | 67°F(19°C) | 43°F(6°C) | 4.0 in(101 mm) | 68% | 2.9 |
| NovNovember | 55°F(13°C) | 35°F(1°C) | 3.3 in(84 mm) | 69% | 2.0 |
| DecDecember | 45°F(7°C) | 27°F(-3°C) | 4.1 in(104 mm) | 70% | 1.6 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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