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
May's onset brings a temperature rise, moving from a mild 60.4°F (15.8°C) in April to a pleasant 70.3°F (21.3°C). Throughout May, the temperature falls to an average low of 52.3°F (11.3°C).Humidity
February and May, with an average relative humidity of 80%, are the most humid months in Grantham.Rainfall
The months with the most rainfall are May and July, with an average 2.05" (52mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in May in Grantham is 14h and 25min.On the first day of the month, sunrise is at 6:06 am and sunset at 8:03 pm. On the last day of May, in Grantham, sunrise is at 5:40 am and sunset at 8:30 pm EDT.
Sunshine
In Grantham, the average sunshine in May is 8.5h.UV index
May through July, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 6 during May leads to these instructions:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Frequently asked questions
What is the temperature in May in Grantham?
What is the most humid month in Grantham?
What is the average humidity in May in Grantham?
What is the rainiest month in Grantham?
How much does it rain in Grantham in May?
When it does not snow in Grantham?
Does it snow in Grantham in May?
How many hours of daylight does Grantham have in May?
When are sunrise and sunset in May in Grantham?
How long on average sun shines in May in Grantham?
What is the month with the highest UV index in Grantham?
What is the UV index intensity in May in Grantham?
Average temperature in May
Grantham, PA
- Average high temperature in May: 70.3°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in May: 52.3°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in May
Grantham, 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
Grantham, PA
- Average wind speed in May: 6.5mph
The windiest months (with the highest average wind speed) are February, March and April (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in May
Grantham, 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
Grantham, PA
- Average rainfall in May: 2.05"
The wettest months (with the highest rainfall) are May and July (2.05").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in May
Grantham, PA
- Average rainfall days in May: 15.6 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in May
Grantham, PA
- Average snowfall in May: 0"
The month with the highest snowfall is January (2.52").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Grantham, PA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Grantham, 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 36min).
Average sunshine days in May
Grantham, PA
- Average sunshine days in May: 12.2 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (12.2 days).
Average UV index in May
Grantham, 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
Grantham, PA
- Average cloud cover in May: 46
The months with the most cloud cover are February and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in May
Grantham, 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).
Grantham, Pennsylvania, USA
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