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
As May begins, there is an increase in the average high-temperature, moving from a moderate 55.8°F (13.2°C) in April to a comfortable 67.1°F (19.5°C). The month of May records an average low-temperature of 48°F (8.9°C) in Saint Johns.Humidity
The average relative humidity in May in Saint Johns, Pennsylvania, is 81%.Rainfall
The month with the most rainfall is May, when the rain falls for 13.8 days and typically aggregates up to 1.26" (32mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Saint Johns. May is the last month it regularly snows. During 0.1 snowfall days, in May, Saint Johns aggregates 0.16" (4mm) of snow. In Saint Johns, during the entire year, snow falls for 31.5 days and aggregates up to 7.28" (185mm) of snow.Daylight
In Saint Johns, 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 8:01 pm. On the last day of May, in Saint Johns, sunrise is at 5:34 am and sunset at 8:29 pm EDT.
Sunshine
The average sunshine in May is 7.7h.UV index
In May, the average daily maximum UV index in Saint Johns is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: A maximum UV index of 5 in May translates into the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 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. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Frequently asked questions
What are May temperatures in Saint Johns?
What is the average humidity in May in Saint Johns?
What is the wettest month in Saint Johns?
How much does it rain in Saint Johns in May?
What is the last month it snows in Saint Johns?
How many hours of daylight does Saint Johns have in May?
When is the sunrise / sunset in May in Saint Johns?
How long on average sun shines in May in Saint Johns?
What is the UV index intensity in May in Saint Johns?
Average temperature in May
Saint Johns, PA
- Average high temperature in May: 67.1°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in May: 48°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in May
Saint Johns, PA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in May
Saint Johns, PA
- Average wind speed in May: 6.5mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in May
Saint Johns, PA
- Average humidity in May: 81%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (78%).
Average rainfall in May
Saint Johns, PA
- Average rainfall in May: 1.26"
The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is September (0.55").
Average rainfall days in May
Saint Johns, PA
- Average rainfall days in May: 13.8 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in May
Saint Johns, PA
- Average snowfall in May: 0.16"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Saint Johns, PA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (9.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Saint Johns, 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 54min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in May
Saint Johns, PA
- Average sunshine days in May: 14.3 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is May (14.3 days).
Average UV index in May
Saint Johns, PA
- Average UV index in May: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in May
Saint Johns, PA
- Average cloud cover in May: 52
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in May
Saint Johns, 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).
Saint Johns, Pennsylvania, USA
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