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
May
Weather in May
Temperature
May's advent notes a subtle adjustment in average high-temperature to a still cool 12.8°C (55°F) from April. During May, Saint Johns's temperature shows a minor deviation from daytime highs, falling to a steady low-temperature average of 10.6°C (51.1°F).Humidity
The average relative humidity in May is 82%.Rainfall
In Saint Johns, in May, it is raining for 11.8 days, with typically 27mm (1.06") of accumulated precipitation. Throughout the year, in Saint Johns, there are 196.3 rainfall days, and 557mm (21.93") of precipitation is accumulated.Snowfall
In Saint Johns, snow does not fall in February through December.Daylight
In Saint Johns, the average length of the day in May is 15h and 22min.On the first day of May, sunrise is at 05:46 and sunset at 20:27. On the last day of the month, sunrise is at 05:08 and sunset at 21:07 BST.
Sunshine
In Saint Johns, the average sunshine in May is 9.1h.UV index
In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: An average maximum UV index of 4 in May leads to these recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Saint Johns in May?
What is the average humidity in May?
How many days does it rain in May?
When it does not snow in Saint Johns?
How many hours of daylight does Saint Johns have in May?
When are sunrise and sunset in May?
How many hours of sunshine does Saint Johns have in May?
What is the UV index intensity in May?
Average temperature in May
Saint Johns, Guernsey
- Average high temperature in May: 12.8°C
The warmest month (with the highest average high temperature) is August (17.8°C).
The month with the lowest average high temperature is February (9.2°C).
- Average low temperature in May: 10.6°C
The month with the highest average low temperature is August (15.8°C).
The coldest month (with the lowest average low temperature) is February (7°C).
Average pressure in May
Saint Johns, Guernsey
- Average pressure in May: 1017.4mbar
The month with the highest atmospheric pressure is September (1017.9mbar).
The month with the lowest atmospheric pressure is November (1011.5mbar).
Average wind speed in May
Saint Johns, Guernsey
- Average wind speed in May: 23.7km/h
The windiest month (with the highest average wind speed) is December (36km/h).
The calmest month (with the lowest average wind speed) is July (21.9km/h).
Average humidity in May
Saint Johns, Guernsey
- Average humidity in May: 82%
The months with the highest relative humidity are June and July (84%).
The months with the lowest relative humidity are November and December (77%).
Average rainfall in May
Saint Johns, Guernsey
- Average rainfall in May: 27mm
The wettest month (with the highest rainfall) is November (87mm).
The driest month (with the least rainfall) is July (26mm).
Average rainfall days in May
Saint Johns, Guernsey
- Average rainfall days in May: 11.8 days
The month with the highest number of rainy days is November (22.8 days).
The month with the least rainy days is June (11.5 days).
Average snowfall in May
Saint Johns, Guernsey
- Average snowfall in May: 0mm
The month with the highest snowfall is January (2mm).
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in May
Saint Johns, Guernsey
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in May /
Average sunshine in May
Saint Johns, Guernsey
- Average daylight in May: 15h and 2min
The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in May: 9h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The months with the least sunshine are January, November and December (Average sunshine: 3h and 54min).
Average sunshine days in May
Saint Johns, Guernsey
- Average sunshine days in May: 16.3 days
The month with the most sunshine days is May (16.3 days).
The month with the least sunshine days is November (4 days).
Average UV index in May
Saint Johns, Guernsey
- Average UV index in May: 4
The months with the highest UV index are July, August and September (UV index 5).
The month with the lowest UV index is February (UV index 2).
Average cloud cover in May
Saint Johns, Guernsey
- Average cloud cover in May: 40
The months with the most cloud cover are November and December (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in May
Saint Johns, Guernsey
- Average visibility in May: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
