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
Katellen sees an increase in the average high-temperature with the arrival of May, moving from April's moderate 57.7°F (14.3°C) to a pleasant 68.7°F (20.4°C). Throughout May, an average nighttime temperature of 49.6°F (9.8°C) is experienced in Katellen, Pennsylvania.Humidity
In May, the average relative humidity is 79%.Rainfall
In May, in Katellen, the rain falls for 17.8 days. Throughout May, 3.03" (77mm) of precipitation is accumulated. In Katellen, during the entire year, the rain falls for 167 days and collects up to 33.5" (851mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Katellen aggregates 0.16" (4mm) of snow. Throughout the year, there are 33.8 snowfall days, and 17.91" (455mm) of snow is accumulated.Daylight
The average length of the day in May in Katellen, Pennsylvania, is 14h and 29min.On the first day of May, sunrise is at 5:58 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 5:32 am and sunset at 8:26 pm EDT.
Sunshine
In Katellen, the average sunshine in May is 8.3h.UV index
The months with the highest UV index in Katellen are May through August, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The UV index of 5 during May leads to these advisories:
Adopt protective measures - It is advised to guard against sun damage. When the Sun is at its strongest around midday, find shade and limit exposure. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Katellen?
What is the average humidity in May in Katellen?
How many days does it rain in May in Katellen?
What is the last month it snows in Katellen?
What is the average length of the day in May in Katellen?
When are sunrise and sunset in May in Katellen?
How many hours of sunshine does Katellen have in May?
When is the highest UV index in Katellen?
What is the UV index intensity in May in Katellen?
Average temperature in May
Katellen, PA
- Average high temperature in May: 68.7°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in May: 49.6°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in May
Katellen, 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
Katellen, PA
- Average wind speed in May: 6.3mph
The windiest month (with the highest average wind speed) is March (8.2mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in May
Katellen, PA
- Average humidity in May: 79%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall in May
Katellen, PA
- Average rainfall in May: 3.03"
The wettest month (with the highest rainfall) is July (3.46").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in May
Katellen, PA
- Average rainfall days in May: 17.8 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (9.9 days).
Average snowfall in May
Katellen, PA
- Average snowfall in May: 0.16"
The month with the highest snowfall is February (4.88").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Katellen, PA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Katellen, 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: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in May
Katellen, PA
- Average sunshine days in May: 11.1 days
The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in May
Katellen, 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
Katellen, PA
- Average cloud cover in May: 48
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in May
Katellen, PA
- Average visibility in May: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Katellen, Pennsylvania, USA
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