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
Upper Lehigh's May weather brings a rise in high-temperatures, moving from a cool 55°F (12.8°C) in April to an enjoyable 66.7°F (19.3°C). The temperature lowers to an average of 48.4°F (9.1°C) during May nights.Humidity
In May, the average relative humidity is 81%.Rainfall
The month with the most rainfall is May, when the rain falls for 19.4 days and typically aggregates up to 3.5" (89mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.3 snowfall days, in May, Upper Lehigh aggregates 0.87" (22mm) of snow. Throughout the year, there are 60.9 snowfall days, and 38.9" (988mm) of snow is accumulated.Daylight
In Upper Lehigh, the average length of the day in May is 14h and 30min.On the first day of the month, sunrise is at 6:00 am and sunset at 8:00 pm. On the last day of May, sunrise is at 5:33 am and sunset at 8:29 pm EDT.
Sunshine
In May, the average sunshine is 7.6h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: An average UV index of 5 in May transforms into this advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Experience reduced UV exposure by about half when donning a wide-brim hat. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Upper Lehigh?
What is the average humidity in May?
What is the wettest month?
How much does it rain in Upper Lehigh in May?
What is the last month it snows?
What is the average length of the day in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Upper Lehigh have in May?
When is the highest UV index?
How high is the UV index in May in Upper Lehigh?
Average temperature in May
Upper Lehigh, PA
- Average high temperature in May: 66.7°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in May: 48.4°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in May
Upper Lehigh, PA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in May
Upper Lehigh, PA
- Average wind speed in May: 6.6mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in May
Upper Lehigh, PA
- Average humidity in May: 81%
The months with the highest relative humidity are February and December (84%).
The month with the lowest relative humidity is April (78%).
Average rainfall in May
Upper Lehigh, PA
- Average rainfall in May: 3.5"
The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is September (2.13").
Average rainfall days in May
Upper Lehigh, PA
- Average rainfall days in May: 19.4 days
The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is January (7 days).
Average snowfall in May
Upper Lehigh, PA
- Average snowfall in May: 0.87"
The month with the highest snowfall is February (8.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Upper Lehigh, PA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (14.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Upper Lehigh, PA
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 7h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in May
Upper Lehigh, PA
- Average sunshine days in May: 9.2 days
The month with the most sunshine days is November (15.6 days).
The month with the least sunshine days is May (9.2 days).
Average UV index in May
Upper Lehigh, PA
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Upper Lehigh, PA
- Average cloud cover in May: 53
The months with the most cloud cover are February and December (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 38).
Average visibility in May
Upper Lehigh, PA
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Upper Lehigh, Pennsylvania, USA
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