August weather forecast
Heidelberg, Germany

Weather in August

The last month of the summer, August, is another warm month in Heidelberg, Germany, with an average temperature fluctuating between 15.3°C (59.5°F) and 25.8°C (78.4°F).

Temperature

August is the warmest month, with an average high-temperature of 25.8°C (78.4°F) and an average low-temperature of 15.3°C (59.5°F).

Humidity

July and August, with an average relative humidity of 67%, are the least humid months in Heidelberg.

Rainfall

In Heidelberg, it is raining for 15.1 days, with typically 43mm (1.69") of accumulated precipitation. In Heidelberg, during the entire year, the rain falls for 164.2 days and collects up to 434mm (17.09") of precipitation.

Snowfall

April through September are months without snowfall.

Daylight

The average length of the day in August in Heidelberg is 14h and 22min.
On the first day of August in Heidelberg, sunrise is at 05:56 and sunset at 21:06. On the last day of the month, sunrise is at 06:39 and sunset at 20:11 CEST.

Sunshine

July and August, with an average of 10.5h of sunshine, are months with the most sunshine in Heidelberg.

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 value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: In August, the average maximum UV index of 5 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the warmest month in Heidelberg?

August is the warmest month in Heidelberg, with an average high-temperature of 25.8°C (78.4°F) and an average low-temperature of 15.3°C (59.5°F).

What is the temperature in August in Heidelberg?

The average high-temperature, in August, in Heidelberg, is 25.8°C (78.4°F), while the average low-temperature is 15.3°C (59.5°F).

What is the least humid month in Heidelberg?

The months with the lowest humidity in Heidelberg, Germany, are July and August, with an average relative humidity of 67%.

What is the average humidity in August in Heidelberg?

In Heidelberg, Germany, the average relative humidity in August is 67%.

How many days does it rain in August in Heidelberg?

In Heidelberg, Germany, during August, the rain falls for 15.1 days and regularly aggregates up to 43mm (1.69") of precipitation.

When it does not snow in Heidelberg?

In Heidelberg, snow does not fall in April through September.

What is the average length of the day in August in Heidelberg?

In August, the average day length in Heidelberg, Germany, is 14h and 22min.

When are sunrise and sunset in August in Heidelberg?

In August, on the first day of the month, sunrise is at 05:56 and sunset at 21:06. On the last day of the month, sunrise is at 06:39 and sunset at 20:11 CEST.

What are the months with the most sunshine in Heidelberg?

July and August, with an average of 10.5h of sunshine, are months with the most sunshine in Heidelberg, Germany.

How long on average sun shines in August in Heidelberg?

The average sunshine duration in August in Heidelberg is 10.5h.

What is the month with the highest UV index in Heidelberg?

The months with the highest UV index in Heidelberg are May through August, with an average maximum UV index of 5.

How high is the UV index in August in Heidelberg?

The average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Heidelberg, Germany

Average temperature in August - Heidelberg, Germany
  • Average high temperature in August: 25.8°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 August: 15.3°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).

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Average pressure in August
Heidelberg, Germany

Average pressure in August - Heidelberg, Germany
  • Average pressure in August: 1016.5mbar

The month with the highest atmospheric pressure is December (1019.1mbar).
The month with the lowest atmospheric pressure is November (1015mbar).

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Average wind speed in August
Heidelberg, Germany

Average wind speed in August - Heidelberg, Germany
  • Average wind speed in August: 8.7km/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).

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Average humidity in August
Heidelberg, Germany

Average humidity in August - Heidelberg, Germany
  • Average humidity in August: 67%

The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are July and August (67%).

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Average rainfall in August
Heidelberg, Germany

Average rainfall in August - Heidelberg, Germany
  • Average rainfall in August: 43mm

The wettest month (with the highest rainfall) is May (50mm).
The driest month (with the least rainfall) is April (19mm).

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Average rainfall days in August
Heidelberg, Germany

Average rainfall days in August - Heidelberg, Germany
  • Average rainfall days in August: 15.1 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).

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Average snowfall in August
Heidelberg, Germany

Average snowfall in August - Heidelberg, Germany
  • Average snowfall in August: 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).

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Average snowfall days in August
Heidelberg, Germany

Average snowfall days in August - Heidelberg, Germany
  • Average snowfall days in August: 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).

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Average daylight in August /
Average sunshine in August
Heidelberg, Germany

Average daylight in August / Average sunshine in August - Heidelberg, Germany
  • Average daylight in August: 14h and 22min

The month with the longest days is June (Average daylight: 16h and 11min).
The month with the shortest days is December (Average daylight: 8h and 16min).

  • Average sunshine in August: 10h and 30min

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).

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Average sunshine days in August
Heidelberg, Germany

Average sunshine days in August - Heidelberg, Germany
  • Average sunshine days in August: 12.5 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).

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Average UV index in August
Heidelberg, Germany

Average UV index in August - Heidelberg, Germany
  • Average UV index in August: 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).

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Average cloud cover in August
Heidelberg, Germany

Average cloud cover in August - Heidelberg, Germany
  • Average cloud cover in August: 30

The month with the most cloud cover is December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 30).

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Average visibility in August
Heidelberg, Germany

Average visibility in August - Heidelberg, Germany
  • Average visibility in August: 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).

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