May weather forecast
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

Weather in May

The last month of the spring, May, is an agreeable month in Harrisburg, Pennsylvania, with an average temperature ranging between max 70.3°F (21.3°C) and min 51.4°F (10.8°C).

Temperature

In Harrisburg, the average high-temperature in May rises from a mild 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

In May, the average relative humidity is 79%.

Rainfall

In Harrisburg, during 13.9 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. In Harrisburg, 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

In Harrisburg, the average length of the day in May is 14h and 26min.
On the first day of the month, sunrise is at 6:06 am and sunset at 8:02 pm. On the last day of May, sunrise is at 5:40 am and sunset at 8:30 pm EDT.

Sunshine

In May, the average sunshine in Harrisburg 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, Pennsylvania. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In May, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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 the 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in May in Harrisburg?

In Harrisburg, the average relative humidity in May is 79%.

How many days does it rain in May in Harrisburg?

In May, in Harrisburg, Pennsylvania, the rain falls for 13.9 days. Throughout May, 1.26" (32mm) of precipitation is accumulated.

When it does not snow in Harrisburg?

In Harrisburg, snow does not fall in May through October.

Does it snow in Harrisburg in May?

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

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

In Harrisburg, the average day length in May is 14h and 26min.

What time are sunrise and sunset in May in Harrisburg?

On the first day of May in Harrisburg, Pennsylvania, sunrise is at 6:06 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 8:30 pm EDT.

How many hours of sunshine does Harrisburg have in May?

The average sunshine duration in May is 8.5h.

What is the month with the highest UV index in Harrisburg?

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

What is the UV index intensity in May in Harrisburg?

In May, the average daily maximum UV index in Harrisburg, Pennsylvania, is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Harrisburg, PA

Average temperature in May - Harrisburg, PA
  • Average high temperature in May: 70.3°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in May: 51.4°F

The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).

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Average pressure in May
Harrisburg, PA

Average pressure in May - Harrisburg, PA
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in May
Harrisburg, PA

Average wind speed in May - Harrisburg, PA
  • Average wind speed in May: 6.3mph

The windiest month (with the highest average wind speed) is March (8.2mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

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Average humidity in May
Harrisburg, PA

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

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

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Average rainfall in May
Harrisburg, PA

Average rainfall in May - Harrisburg, PA
  • Average rainfall in May: 1.26"

The wettest month (with the highest rainfall) is August (1.3").
The driest months (with the least rainfall) are January and February (0.71").

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Average rainfall days in May
Harrisburg, PA

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 least rainy days is January (5.7 days).

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Average snowfall in May
Harrisburg, PA

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

The month with the highest snowfall is February (1.3").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in May
Harrisburg, PA

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).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in May /
Average sunshine in May
Harrisburg, PA

Average daylight in May / Average sunshine in May - Harrisburg, PA
  • Average daylight in May: 14h and 26min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 22min).

  • Average sunshine in May: 8h and 30min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

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Average sunshine days in May
Harrisburg, PA

Average sunshine days in May - Harrisburg, PA
  • Average sunshine days in May: 14.5 days

The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is July (14.1 days).

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Average UV index in May
Harrisburg, PA

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

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

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Average cloud cover in May
Harrisburg, PA

Average cloud cover in May - Harrisburg, PA
  • Average cloud cover in May: 46

The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in May
Harrisburg, PA

Average visibility in May - Harrisburg, PA
  • Average visibility in May: 5mi

The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).

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