Harrisburg Climate by Month
Harrisburg, Pennsylvania, United States
Hot summers and cold winters, with rain spread through the year.
The climate in Harrisburg is one of hot summers and cold winters, with rain spread through the year. Afternoon highs range from 40°F (4°C) in January to 88°F (31°C) in July, and January nights average 23°F (-5°C). It gets 41 in (1032 mm) of rain a year, spread across the months.
- Warmest month
- 88°F(31°C)
- Average high, July
- Coldest nights
- 23°F(-5°C)
- Average low, January
- Rain per year
- 41 in(1032 mm)
- No clear rainy season
- Humidity
- 63%
- Sunniest: July
Best and worst months in Harrisburg
Best for weatherThe most comfortable weather comes in May, with highs around 75°F (24°C) and about 3.9 in (99 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)
Harrisburg weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 40°F(4°C) | 23°F(-5°C) | 2.8 in(72 mm) | 67% | 1.7 |
| FebFebruary | 43°F(6°C) | 24°F(-4°C) | 2.6 in(66 mm) | 62% | 2.7 |
| MarMarch | 52°F(11°C) | 31°F(0°C) | 3.5 in(88 mm) | 56% | 3.6 |
| AprApril | 65°F(18°C) | 41°F(5°C) | 3.4 in(86 mm) | 58% | 4.6 |
| MayMayBest | 75°F(24°C) | 51°F(11°C) | 3.9 in(99 mm) | 61% | 5.3 |
| JunJune | 84°F(29°C) | 61°F(16°C) | 4.0 in(101 mm) | 63% | 5.7 |
| JulJuly | 88°F(31°C) | 65°F(18°C) | 3.4 in(87 mm) | 64% | 5.7 |
| AugAugust | 86°F(30°C) | 63°F(17°C) | 3.3 in(84 mm) | 65% | 5.0 |
| SepSeptember | 80°F(26°C) | 56°F(13°C) | 4.3 in(108 mm) | 65% | 4.1 |
| OctOctober | 67°F(20°C) | 44°F(7°C) | 3.1 in(79 mm) | 65% | 2.9 |
| NovNovember | 55°F(13°C) | 35°F(2°C) | 3.0 in(75 mm) | 59% | 1.9 |
| DecDecember | 44°F(7°C) | 28°F(-2°C) | 3.4 in(87 mm) | 70% | 1.5 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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