Harrisburg weather
Best months for weather: Apr–Oct. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Harrisburg, Pennsylvania, United States.
Best Time to Visit
Peak season Apr–OctOff season Dec–Mar
Harrisburg weather by month
When is the best time to visit Harrisburg?
Based on weather alone, the best time to visit Harrisburg is Apr–Oct, according to NASA's 2001–2025 climate averages. Dec–Mar tends to be the least pleasant. Average highs run from 1°C (34°F) in January to 30°C (86°F) in July.
What is the rainiest month in Harrisburg?
September is the wettest month, with about 119 mm (4.7 in) of rain on average. February is the driest, with about 68 mm (2.7 in).
What is the hottest month in Harrisburg?
July is the warmest, with average highs of 30°C (86°F) and lows of 18°C (64°F). January is the coolest, with highs of 1°C (34°F) and lows of -7°C (20°F).
Does Harrisburg have a rainy season?
Not a strong one. No month averages more than 150 mm of rain; the wettest is September at about 119 mm (4.7 in).
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), forecast and current conditions from Open-Meteo. Page updated . How we rate months