May weather forecastHeidelberg, Germany
May
Weather in May
May marks the bridge month in Heidelberg, Germany, as the city transitions from the pleasant spring to summertime. The climb in temperature progresses steadily, bringing ample opportunities for sunbathing and outdoor excursions. The city gears up to accept a considerable rainfall, signaling the lead-up to June. Continuing the warming trend from April, May registers a high temperature of 19.3°C (66.7°F). It's a period when Heidelberg showcases its sun-speckled landscape, making way for a heated and vibrant summer.Temperature
Heidelberg's transition into May brings a slight rise in the average high-temperature, moving from 16.3°C (61.3°F) in April to a still comfortable 19.3°C (66.7°F). During May, the temperature in Heidelberg tends to dip to an average of 8.8°C (47.8°F) at night.Humidity
In May, the average relative humidity in Heidelberg, Germany, is 73%.Rainfall
The month with the most rainfall is May, when the rain falls for 15.8 days and typically aggregates up to 50mm (1.97") of precipitation.Snowfall
April through September are months without snowfall.Daylight
In Heidelberg, the average length of the day in May is 15h and 22min.On the first day of the month, sunrise is at 06:02 and sunset at 20:42. On the last day of May, in Heidelberg, sunrise is at 05:24 and sunset at 21:22 CEST.
Sunshine
In Heidelberg, the average sunshine in May is 9.3h.UV index
The months with the highest UV index in Heidelberg are May through August, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In May, an average UV index of 5 transforms into the following instructions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Heidelberg, Germany
- Average high temperature in May: 19.3°C
The warmest month (with the highest average high temperature) is August (25.8°C).
The month with the lowest average high temperature is January (4°C).
- Average low temperature in May: 8.8°C
The month with the highest average low temperature is August (15.3°C).
The coldest month (with the lowest average low temperature) is January (-0.3°C).
Average pressure in May
Heidelberg, Germany
- Average pressure in May: 1016.1mbar
The month with the highest atmospheric pressure is December (1019.1mbar).
The month with the lowest atmospheric pressure is November (1015mbar).
Average wind speed in May
Heidelberg, Germany
- Average wind speed in May: 9.7km/h
The windiest month (with the highest average wind speed) is February (12.3km/h).
The calmest month (with the lowest average wind speed) is August (8.7km/h).
Average humidity in May
Heidelberg, Germany
- Average humidity in May: 73%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are July and August (67%).
Average rainfall in May
Heidelberg, Germany
- Average rainfall in May: 50mm
The wettest month (with the highest rainfall) is May (50mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in May
Heidelberg, Germany
- Average rainfall days in May: 15.8 days
The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is September (10.8 days).
Average snowfall in May
Heidelberg, Germany
- Average snowfall in May: 0mm
The month with the highest snowfall is December (44mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in May
Heidelberg, Germany
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (5.4 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Heidelberg, Germany
- Average daylight in May: 15h and 24min
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 18min).
- Average sunshine in May: 9h and 18min
The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in May
Heidelberg, Germany
- Average sunshine days in May: 13 days
The month with the most sunshine days is September (17.3 days).
The month with the least sunshine days is December (11.5 days).
Average UV index in May
Heidelberg, Germany
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Heidelberg, Germany
- Average cloud cover in May: 40
The month with the most cloud cover is December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in May
Heidelberg, Germany
- Average visibility in May: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January and December (8km).
