- Harrisburg ›
- Weather by month
Harrisburg Weather by Month
Average temperatures, rainfall and humidity for Harrisburg, United States, month by month, built from OpenWeather’s historical records. Use it to see what a typical Harrisburg month looks like before you travel — then check the live Harrisburg forecast for the days ahead.
Warmest month
July
31°C average high
Coolest month
January
-2°C average low
Wettest month
May
132 mm of rain
Driest month
February
55 mm of rain
Average temperature and rainfall in Harrisburg by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 6°C | -2°C | -16°C / 23°C | 73 mm | 70% | 12 km/h |
| February | 8°C | 0°C | -18°C / 26°C | 55 mm | 68% | 12 km/h |
| March | 13°C | 3°C | -16°C / 28°C | 70 mm | 63% | 14 km/h |
| April | 19°C | 9°C | -4°C / 32°C | 104 mm | 63% | 14 km/h |
| May | 24°C | 14°C | 1°C / 36°C | 132 mm | 71% | 11 km/h |
| June | 28°C | 18°C | 9°C / 38°C | 123 mm | 70% | 10 km/h |
| July | 31°C | 21°C | 14°C / 39°C | 102 mm | 74% | 9 km/h |
| August | 29°C | 20°C | 12°C / 36°C | 84 mm | 75% | 9 km/h |
| September | 26°C | 17°C | 6°C / 36°C | 89 mm | 76% | 10 km/h |
| October | 20°C | 11°C | 0°C / 33°C | 91 mm | 76% | 10 km/h |
| November | 13°C | 4°C | -10°C / 27°C | 95 mm | 69% | 11 km/h |
| December | 9°C | 1°C | -14°C / 21°C | 81 mm | 73% | 11 km/h |
Best time to visit Harrisburg
The most comfortable time to visit Harrisburg is generally May and September to October, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around May, totalling about 1,099 mm a year.
Travellers who prefer heat should aim for July, when highs average 31°C. May is the month to avoid if rain would spoil your plans — it averages 132 mm, roughly 2× the rainfall of the driest month (February).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Harrisburg forecast for what is happening now.
Weather across United States right now
- Atlanta20°C
- Austin24°C
- Baltimore16°C
- Boston13°C
- Brooklyn16°C
- Chicago19°C
- Dallas23°C
- Denver16°C
- Detroit17°C
- Houston25°C
- Indianapolis18°C
- Las Vegas20°C
- Los Angeles15°C
- Miami26°C
- Minneapolis16°C
- New York16°C
- Orlando24°C
- Philadelphia16°C
- Phoenix24°C
- Pittsburgh13°C
- Portland9°C
- Queens16°C
- Riverside16°C
- Sacramento14°C
- San Antonio24°C
- San Diego19°C
- San Francisco14°C
- San Jose14°C
- Seattle8°C
- St. Louis20°C
- Tampa23°C
- Washington17°C
