May weather forecast and climate
Harrisburg, PA

A church, a mosque, and other buildings along the State Street in Harrisburg, Pennsylvania
A church, a mosque, and other buildings along the State Street in Harrisburg, Pennsylvania

What is the average temperature in May in Harrisburg?

In Harrisburg, in May, the average high-temperature is 72.1°F (22.3°C), and the average low-temperature is 52.2°F (11.2°C).
Average temperature in May - Harrisburg, PA
  • Average high temperature in May: 22.3°C

The warmest month (with the highest average high temperature) is July (29.7°C).
The month with the lowest average high temperature is January (2.8°C).

  • Average low temperature in May: 11.2°C

The month with the highest average low temperature is July (19.1°C).
The coldest month (with the lowest average low temperature) is January (-5.1°C).

Average humidity in May - Harrisburg, PA
  • Average humidity in May: 65.2%

The month with the highest relative humidity is September (73.8%).
The month with the lowest relative humidity is April (59.2%).

Average rainfall in May - Harrisburg, PA
  • Average rainfall in May: 96.3mm

The wettest month (with the highest rainfall) is July (117.1mm).
The driest month (with the lowest rainfall) is February (60.7mm).

Average rainfall days in May - Harrisburg, PA
  • Average rainfall days in May: 12.2 days

The month with the highest number of rainy days is May (12.2 days).
The month with the lowest number of rainy days is October (8.8 days).

Average snowfall in May - Harrisburg, PA
  • Average snowfall in May: 0mm

The month with the highest snowfall is February (266.7mm).
Months with the lowest snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in May - Harrisburg, PA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (5.2 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in May / Average sunshine in May - Harrisburg, PA
  • Average daylight in May: 14.4h

The month with the longest days is June (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9.4h).

  • Average sunshine in May: 8.6h

The month with most sunshine is July (Average sunshine: 10h).
The month with least sunshine is December (Average sunshine: 4.1h).

Average UV index in May - Harrisburg, PA
  • Average UV index in May: 8

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 2).

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