May weather forecastGrantham, United Kingdom
May
Weather in May
May, the last month of the spring in Grantham, is another mild month, with an average temperature varying between 6.7°C (44.1°F) and 15.4°C (59.7°F).Temperature
In the transition from April to May, Grantham reports an average high-temperature of a still mild 15.4°C (59.7°F), indicating a close resemblance to the prior month. The average low-temperature during May nights is a chilly 6.7°C (44.1°F).Humidity
In May, the average relative humidity is 82%.Rainfall
In May, the rain falls for 15.4 days. Throughout May, 21mm (0.83") of precipitation is accumulated. Throughout the year, in Grantham, there are 152.3 rainfall days, and 262mm (10.31") of precipitation is accumulated.Snowfall
In Grantham, snow does not fall in May through October.Daylight
In Grantham, the average length of the day in May is 15h and 50min.On the first day of May, sunrise is at 5:28 am and sunset at 8:30 pm. On the last day of the month, sunrise is at 4:43 am and sunset at 9:17 pm BST.
Sunshine
In Grantham, the average sunshine in May is 7.2h.UV index
The average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: A maximum high UV index of 4 in May translates into the following recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Grantham, United Kingdom
- Average high temperature in May: 15.4°C
The warmest month (with the highest average high temperature) is July (20.7°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in May: 6.7°C
The month with the highest average low temperature is August (12.8°C).
The coldest month (with the lowest average low temperature) is January (1.6°C).
Average pressure in May
Grantham, United Kingdom
- Average pressure in May: 1016.4mbar
The month with the highest atmospheric pressure is May (1016.4mbar).
The month with the lowest atmospheric pressure is November (1009.7mbar).
Average wind speed in May
Grantham, United Kingdom
- Average wind speed in May: 13.8km/h
The windiest month (with the highest average wind speed) is December (18.5km/h).
The calmest month (with the lowest average wind speed) is July (12.7km/h).
Average humidity in May
Grantham, United Kingdom
- Average humidity in May: 82%
The month with the highest relative humidity is December (90%).
The month with the lowest relative humidity is August (77%).
Average rainfall in May
Grantham, United Kingdom
- Average rainfall in May: 21mm
The wettest month (with the highest rainfall) is June (37mm).
The driest months (with the least rainfall) are March and April (15mm).
Average rainfall days in May
Grantham, United Kingdom
- Average rainfall days in May: 15.4 days
The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is February (8.9 days).
Average snowfall in May
Grantham, United Kingdom
- Average snowfall in May: 0mm
The month with the highest snowfall is January (17mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in May
Grantham, United Kingdom
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (3.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Grantham, United Kingdom
- Average daylight in May: 15h and 48min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in May: 7h and 12min
The months with the most sunshine are July and August (Average sunshine: 7h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in May
Grantham, United Kingdom
- Average sunshine days in May: 10.8 days
The months with the most sunshine days are October and December (15.9 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in May
Grantham, United Kingdom
- Average UV index in May: 4
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Grantham, United Kingdom
- Average cloud cover in May: 54
The month with the most cloud cover is November (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 49).
Average visibility in May
Grantham, United Kingdom
- Average visibility in May: 9km
The months with the highest visibility are January, February, March, April, May, July, August, September, October and December (9km).
The months with the lowest visibility are June and November (8km).
