May weather forecastKeldur, Iceland
May
Weather in May
The last month of the spring, May, is also a frosty month in Keldur, Iceland, with an average temperature varying between 7.7°C (45.9°F) and 5.3°C (41.5°F).Temperature
Keldur's shift from April to May is accompanied by an average high-temperature of a still frosty 7.7°C (45.9°F), a slight deviation from 6.1°C (43°F). During the May nights, Keldur's temperature maintains an average close to the daytime highs, settling at an icy 5.3°C (41.5°F).Humidity
In Keldur, the average relative humidity in May is 77%.Rainfall
In May, in Keldur, the rain falls for 16.6 days. Throughout May, 59mm (2.32") of precipitation is accumulated. Throughout the year, there are 215.2 rainfall days, and 1116mm (43.94") of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Keldur. During 0.8 snowfall days, in May, Keldur aggregates 6mm (0.24") of snow. In Keldur, Iceland, during the entire year, snow falls for 32.4 days and aggregates up to 397mm (15.63") of snow.Daylight
The average length of the day in May is 18h and 22min.On the first day of the month, sunrise is at 04:52 and sunset at 21:42. On the last day of May, sunrise is at 03:21 and sunset at 23:14 GMT.
Sunshine
May through July, with an average of 8.6h of sunshine, are months with the most sunshine in Keldur.UV index
The average daily maximum UV index in May in Keldur, Iceland, is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index, 3 in May, converts into the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Keldur, Iceland
- Average high temperature in May: 7.7°C
The warmest months (with the highest average high temperature) are July and August (12.3°C).
The month with the lowest average high temperature is December (4.5°C).
- Average low temperature in May: 5.3°C
The months with the highest average low temperature are July and August (9.7°C).
The coldest months (with the lowest average low temperature) are March and December (1.9°C).
Average pressure in May
Keldur, Iceland
- Average pressure in May: 1012.1mbar
The month with the highest atmospheric pressure is June (1013.8mbar).
The month with the lowest atmospheric pressure is January (996.8mbar).
Average wind speed in May
Keldur, Iceland
- Average wind speed in May: 24.9km/h
The windiest month (with the highest average wind speed) is February (34.7km/h).
The calmest month (with the lowest average wind speed) is July (19.5km/h).
Average humidity in May
Keldur, Iceland
- Average humidity in May: 77%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is December (73%).
Average rainfall in May
Keldur, Iceland
- Average rainfall in May: 59mm
The wettest month (with the highest rainfall) is January (130mm).
The driest month (with the least rainfall) is June (48mm).
Average rainfall days in May
Keldur, Iceland
- Average rainfall days in May: 16.6 days
The month with the highest number of rainy days is September (21.5 days).
The month with the least rainy days is June (15 days).
Average snowfall in May
Keldur, Iceland
- Average snowfall in May: 6mm
The month with the highest snowfall is March (115mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in May
Keldur, Iceland
- Average snowfall days in May: 0.8 days
The month with the highest number of snowfall days is March (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Keldur, Iceland
- Average daylight in May: 18h and 24min
The month with the longest days is June (Average daylight: 20h and 36min).
The month with the shortest days is December (Average daylight: 4h and 36min).
- Average sunshine in May: 8h and 36min
The months with the most sunshine are May, June and July (Average sunshine: 8h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in May
Keldur, Iceland
- Average sunshine days in May: 12.3 days
The month with the most sunshine days is June (12.8 days).
The month with the least sunshine days is March (5.8 days).
Average UV index in May
Keldur, Iceland
- Average UV index in May: 3
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in May
Keldur, Iceland
- Average cloud cover in May: 55
The month with the most cloud cover is March (Cloud cover 65).
The months with the least cloud cover are May and August (Cloud cover 55).
Average visibility in May
Keldur, Iceland
- Average visibility in May: 10km
The months with the highest visibility are May and June (10km).
The months with the lowest visibility are January, February, March, April, July, August, September, October, November and December (9km).
