May weather forecastHarrisburg, PA
May
Weather in May
May marks a glorious season for this city of Pennsylvania, as summer begins to unfold itself. Rainfall increases to 1.26" (32mm) in May, ushering lush green landscapes across Harrisburg. Fresh foliage, scattered rain showers, and increasing warmth create pleasing afternoons and memorable sunsets. It's an opportune time for a myriad of outdoor activities such as hiking, biking, and sightseeing. Additionally, the city's ecological and urban landscapes offer a diverse visual feast for photographers.Temperature
May's arrival in Harrisburg is marked by an increase in the average high-temperature, moving from a moderate 60.1°F (15.6°C) in April to a pleasant 70.3°F (21.3°C). Harrisburg's nighttime temperature in May drops to an average of 51.4°F (10.8°C).Humidity
The average relative humidity in May is 79%.Rainfall
In Harrisburg, in May, 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
May through October are months without snowfall.Daylight
The average length of the day in May is 14h and 26min.On the first day of May, sunrise is at 6:05 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 8:30 pm EDT.
Sunshine
The average sunshine in May is 8.5h.UV index
The months with the highest UV index are May through July, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index, 6 in May, converts into the following recommendations:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
Average daylight in May /
Average sunshine in May
Harrisburg, PA
- Average daylight in May: 14h and 24min
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 24min).
- 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).
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).
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).
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).
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).
