Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May's onset brings a rise in the average high-temperature, moving from a cool 54.3°F (12.4°C) in April to a comfortable 66.7°F (19.3°C). An average nighttime temperature of 48.6°F (9.2°C) is observed during May.Humidity
The months with the lowest humidity are April through August, with an average relative humidity of 80%.Rainfall
In May, in Harmonsburg, the rain falls for 17.3 days. Throughout May, 2.44" (62mm) of precipitation is accumulated. In Harmonsburg, Pennsylvania, during the entire year, the rain falls for 167.5 days and collects up to 24.29" (617mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Harmonsburg. During 0.5 snowfall days, in May, Harmonsburg aggregates 0.24" (6mm) of snow. Throughout the year, there are 79.8 snowfall days, and 25.39" (645mm) of snow is accumulated.Daylight
The average length of the day in May is 14h and 33min.On the first day of the month, sunrise is at 6:16 am and sunset at 8:19 pm. On the last day of May, sunrise is at 5:49 am and sunset at 8:48 pm EDT.
Sunshine
The average sunshine in May is 8.7h.UV index
In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: In May, the maximum UV index of 5 suggests this advice:
Put precautions into practice - Protective measures against sun-induced damage are advised. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Employ a wide-brim hat for potent defense against up to 50% of UV rays. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What are the least humid months in Harmonsburg?
What is the average humidity in May?
How many days does it rain in May?
What is the last month it snows?
How many hours of daylight does Harmonsburg have in May?
What time are sunrise and sunset in May?
How long on average sun shines in May?
What is the UV index reading in May in Harmonsburg?
Average temperature in May
Harmonsburg, PA
- Average high temperature in May: 66.7°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in May: 48.6°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in May
Harmonsburg, PA
- Average pressure in May: 29.99"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Harmonsburg, PA
- Average wind speed in May: 6.8mph
The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).
Average humidity in May
Harmonsburg, PA
- Average humidity in May: 80%
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are April, May, June, July and August (80%).
Average rainfall in May
Harmonsburg, PA
- Average rainfall in May: 2.44"
The wettest month (with the highest rainfall) is June (2.72").
The driest month (with the least rainfall) is November (1.42").
Average rainfall days in May
Harmonsburg, PA
- Average rainfall days in May: 17.3 days
The month with the highest number of rainy days is October (17.5 days).
The month with the least rainy days is January (7.6 days).
Average snowfall in May
Harmonsburg, PA
- Average snowfall in May: 0.24"
The month with the highest snowfall is January (6.42").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Harmonsburg, PA
- Average snowfall days in May: 0.5 days
The month with the highest number of snowfall days is January (20.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Harmonsburg, PA
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in May
Harmonsburg, PA
- Average sunshine days in May: 12.2 days
The month with the most sunshine days is July (12.5 days).
The month with the least sunshine days is February (6.7 days).
Average UV index in May
Harmonsburg, PA
- Average UV index in May: 5
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Harmonsburg, PA
- Average cloud cover in May: 44
The month with the most cloud cover is January (Cloud cover 76).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in May
Harmonsburg, PA
- Average visibility in May: 5mi
The months with the highest visibility are April, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
Harmonsburg, Pennsylvania, USA
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