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 an agreeable month, with average temperature ranging between max 70.3°F (21.3°C) and min 51.4°F (10.8°C).

Temperature

In May, the average high-temperature rises, from a moderate 60.1°F (15.6°C) in April, to an agreeable 70.3°F (21.3°C). In May, in Harrisburg, the average low-temperature is 51.4°F (10.8°C).

Humidity

The average relative humidity in Harrisburg is 79%.

Rainfall

In Harrisburg, during 13.9 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. In Harrisburg, Pennsylvania, during the entire year, the rain falls for 122.3 days and collects up to 11.73" (298mm) of precipitation.

Snowfall

In Harrisburg snow does not fall through October.

Daylight

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

Sunshine

In May, the average sunshine is 8.5h.

UV index

May through July, with an average maximum UV index of 6, are months with the highest UV index in Harrisburg. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in May in Harrisburg?

The average high-temperature, in May, in Harrisburg, is 70.3°F (21.3°C), while the average low-temperature is 51.4°F (10.8°C).

What is the average humidity in May in Harrisburg?

The average relative humidity in May in Harrisburg is 79%.

How much does it rain in Harrisburg in May?

In Harrisburg, in May, it is raining for 13.9 days, with typically 1.26" (32mm) 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, Pennsylvania, snow does not fall in May through October.

How many hours of daylight does Harrisburg have in May?

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

How long on average sun shines in May in Harrisburg?

In Harrisburg, Pennsylvania, the average sunshine in May is 8.5h.

When is the highest UV index in Harrisburg?

May through July, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index reading in May in Harrisburg?

In May, the average daily maximum UV index in Harrisburg is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in May - Harrisburg, PA
  • Average high temperature in May: 21.3°C

The warmest month (with the highest average high temperature) is July (28.8°C).
The month with the lowest average high temperature is January (1.7°C).

  • Average low temperature in May: 10.8°C

The month with the highest average low temperature is July (17.5°C).
The coldest month (with the lowest average low temperature) is January (-5.5°C).

Average humidity in May - Harrisburg, PA
  • Average humidity in May: 79%

The month with the highest relative humidity is February (80%).
Months with the lowest relative humidity are March and April (75%).

Average rainfall in May - Harrisburg, PA
  • Average rainfall in May: 32mm

The wettest month (with the highest rainfall) is August (33mm).
Driest months (with the lowest rainfall) are January and February (18mm).

Average rainfall days in May - Harrisburg, PA
  • Average rainfall days in May: 13.9 days

The month with the highest number of rainy days is May (13.9 days).
The month with the lowest number of rainy days is January (5.7 days).

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

The month with the highest snowfall is February (33mm).
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: 0.1 days

The month with the highest number of snowfall days is January (6.3 days).
Months with the lowest number of snowfall days are 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: 8.5h

The month with most sunshine is July (Average sunshine: 10.5h).
The month with least sunshine is February (Average sunshine: 4.5h).

Average UV index in May - Harrisburg, PA
  • Average UV index in May: 6

Months with the highest UV index are May, June and July (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).