Harrisburg
Pennsylvania, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Harrisburg, PA

A church, a mosque, and other buildings along State Street in Harrisburg, Pennsylvania
A church, a mosque, and other buildings along State Street in Harrisburg, Pennsylvania
May, the last month of the spring, in Harrisburg, is a pleasant month, with temperature in the range of an average high of 72.1°F (22.3°C) and an average low of 52.2°F (11.2°C).

Temperature

In May, the average high-temperature rises, from an enjoyable 62.4°F (16.9°C) in April, to an agreeable 72.1°F (22.3°C). The average low-temperature, in May, is 52.2°F (11.2°C).

Humidity

The average relative humidity in May is 65.2%.

Rainfall

In Harrisburg, Pennsylvania, during 12.2 rainfall days, 3.8" (96.3mm) of precipitation is typically accumulated. In Harrisburg, during the entire year, the rain falls for 122 days and collects up to 40.7" (1034.8mm) of precipitation.

Snowfall

In Harrisburg snow does not fall in May through October.

Daylight

The average length of the day in May is 14.4h.

Sunshine

In Harrisburg, Pennsylvania, the average sunshine is 8.6h.

UV index

In May, the average daily maximum UV index in Harrisburg is 8. A UV Index estimate of 8 to 10 represents a very high threat to health from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 8 interpret into the following advice:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in May in Harrisburg?

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

What is the average humidity in May in Harrisburg?

In Harrisburg, Pennsylvania, the average relative humidity in May is 65.2%.

How much does it rain in Harrisburg in May?

In Harrisburg, in May, it is raining for 12.2 days, with typically 3.8" (96.3mm) of accumulated precipitation.

Does it snow in Harrisburg in May?

In May, it doesn't snow. April is the latest month when it typically snows.

When it does not snow in Harrisburg?

In Harrisburg snow does not fall in May through October.

What is the average length of the day in May in Harrisburg?

In Harrisburg, the average length of the day in May is 14.4h.

How long on average sun shines in May in Harrisburg?

The average sunshine in May in Harrisburg, Pennsylvania, is 8.6h.

How high is the UV index in May in Harrisburg?

In Harrisburg, Pennsylvania, the average daily maximum UV index in May is 8. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from unprotected exposure to the UV radiation.
Average temperature in May - Harrisburg, PA
  • Average high temperature in May: 72.1°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in May: 52.1°F

The month with the highest average low temperature is July (66.3°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).

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: 3.8"

The wettest month (with the highest rainfall) is July (4.6").
The driest month (with the lowest rainfall) is February (2.4").

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: 0"

The month with the highest snowfall is February (10.5").
Months with the lowest snowfall are May, June, July, August, September and October (0").

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).