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
Lower Allen in May shows a temperature shift, moving from an average high of a moderate 59.9°F (15.5°C) in April to a pleasant 70.2°F (21.2°C). In Lower Allen, an average temperature of 51.8°F (11°C) is noted during May nights.Humidity
February and May, with an average relative humidity of 80%, are the most humid months.Rainfall
The wettest months are May and August, with an average 2.09" (53mm) of rainfall.Snowfall
In Lower Allen, snow does not fall in May through October.Daylight
The average length of the day in May is 14h and 26min.On the first day of May, sunrise is at 6:06 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 8:30 pm EDT.
Sunshine
In Lower Allen, 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 of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 6 in May translates into this advice:
Skirt overexposure. People with light complexions might get scorched in under 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. Stay sun-safe with clothing that is both closely woven and worn loosely. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the most humid month?
What is the average humidity in May?
What is the rainiest month?
How much does it rain in Lower Allen in May?
When it does not snow?
Does it snow in Lower Allen in May?
How many hours of daylight does Lower Allen have in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Lower Allen have in May?
What is the month with the highest UV index?
What is the UV index intensity in May?
Average temperature in May
Lower Allen, PA
- Average high temperature in May: 70.2°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in May: 51.8°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).
Average pressure in May
Lower Allen, PA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in May
Lower Allen, PA
- Average wind speed in May: 6.4mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in May
Lower Allen, PA
- Average humidity in May: 80%
The months with the highest relative humidity are February and May (80%).
The month with the lowest relative humidity is April (75%).
Average rainfall in May
Lower Allen, PA
- Average rainfall in May: 2.09"
The wettest months (with the highest rainfall) are May and August (2.09").
The driest months (with the least rainfall) are January and September (1.3").
Average rainfall days in May
Lower Allen, PA
- Average rainfall days in May: 17 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in May
Lower Allen, PA
- Average snowfall in May: 0"
The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Lower Allen, PA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (7.1 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
Lower Allen, PA
- Average daylight in May: 14h and 2min
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 3min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in May
Lower Allen, PA
- Average sunshine days in May: 12 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (12 days).
Average UV index in May
Lower Allen, 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
Lower Allen, PA
- Average cloud cover in May: 46
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in May
Lower Allen, 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).
Lower Allen, Pennsylvania, USA
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