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
A rise in the average high-temperature is observed during May, moving from a moderate 60.4°F (15.8°C) in April to a pleasant 70.3°F (21.3°C). May is noted for a mean low-temperature of 53.4°F (11.9°C).Humidity
The average relative humidity in May is 78%.Rainfall
In Allentown, in May, it is raining for 16.2 days, with typically 2.68" (68mm) of accumulated precipitation. Throughout the year, in Allentown, there are 152.9 rainfall days, and 28.78" (731mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall in Allentown, New Jersey. May is the last month it regularly snows in Allentown, New Jersey. During 0.1 snowfall days, in May, Allentown aggregates 0.16" (4mm) of snow. In Allentown, during the entire year, snow falls for 17.7 days and aggregates up to 8.43" (214mm) of snow.Daylight
In May, the average length of the day is 14h and 25min.On the first day of the month, sunrise is at 5:56 am and sunset at 7:53 pm. On the last day of May, sunrise is at 5:31 am and sunset at 8:21 pm EDT.
Sunshine
The average sunshine in May in Allentown is 8.7h.UV index
The months with the highest UV index in Allentown, New Jersey, are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 6 in May translates into the following instructions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Frequently asked questions
What is the usual temperature for Allentown in May?
What is the average humidity in May in Allentown?
How many days does it rain in May in Allentown?
What is the last month it snows in Allentown?
What is the average length of the day in May in Allentown?
When is the sunrise / sunset in May in Allentown?
How long on average sun shines in May in Allentown?
When is the highest UV index in Allentown?
How high is the UV index in May in Allentown?
Average temperature in May
Allentown, NJ
- Average high temperature in May: 70.3°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (37.4°F).
- Average low temperature in May: 53.4°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (25°F).
Average pressure in May
Allentown, NJ
- Average pressure in May: 30.01"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
Allentown, NJ
- Average wind speed in May: 7.1mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in May
Allentown, NJ
- Average humidity in May: 78%
The month with the highest relative humidity is October (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall in May
Allentown, NJ
- Average rainfall in May: 2.68"
The wettest month (with the highest rainfall) is July (3.39").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in May
Allentown, NJ
- Average rainfall days in May: 16.2 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in May
Allentown, NJ
- Average snowfall in May: 0.16"
The month with the highest snowfall is March (3.11").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Allentown, NJ
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (5.3 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
Allentown, NJ
- 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 4min
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 48min).
Average sunshine days in May
Allentown, NJ
- Average sunshine days in May: 12 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (11 days).
Average UV index in May
Allentown, NJ
- Average UV index in May: 6
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Allentown, NJ
- Average cloud cover in May: 46
The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in May
Allentown, NJ
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Allentown, New Jersey, USA
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