January weather forecast
Heidelberg, Germany

Weather in January

January, like December, in Heidelberg, Germany, is a wintry winter month, with an average temperature fluctuating between -0.3°C (31.5°F) and 4°C (39.2°F).

Temperature

With an average high-temperature of 4°C (39.2°F) and an average low-temperature of -0.3°C (31.5°F), January is the coldest month.

Humidity

With an average relative humidity of 86%, January is the most humid month.

Rainfall

In Heidelberg, it is raining for 13.3 days, with typically 32mm (1.26") of accumulated precipitation. In Heidelberg, Germany, during the entire year, the rain falls for 164.2 days and collects up to 434mm (17.09") of precipitation.

Snowfall

Months with snowfall are January through March, October through December. In January, it is snowing for 5.4 days. Throughout January, 28mm (1.1") of snow is accumulated. In Heidelberg, during the entire year, snow falls for 15.5 days and aggregates up to 116mm (4.57") of snow.

Daylight

In Heidelberg, Germany, the average length of the day in January is 8h and 44min.
On the first day of January, sunrise is at 08:20 and sunset at 16:36. On the last day of the month, sunrise is at 07:58 and sunset at 17:19 CET.

Sunshine

In Heidelberg, the average sunshine in January is 4.2h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 2 in January transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Heidelberg?

January is the coldest month in Heidelberg, with an average high-temperature of 4°C (39.2°F) and an average low-temperature of -0.3°C (31.5°F).

What is the temperature in January in Heidelberg?

The average high-temperature, in January, in Heidelberg, is 4°C (39.2°F), while the average low-temperature is -0.3°C (31.5°F).

What is the most humid month in Heidelberg?

January is the most humid month, with an average relative humidity of 86%.

What is the average humidity in January in Heidelberg?

In January, the average relative humidity in Heidelberg, Germany, is 86%.

How much does it rain in Heidelberg in January?

In Heidelberg, during January, the rain falls for 13.3 days and regularly aggregates up to 32mm (1.26") of precipitation.

How much does it snow in Heidelberg in January?

In Heidelberg, in January, during 5.4 snowfall days, 28mm (1.1") of snow is typically accumulated.

How many hours of daylight does Heidelberg have in January?

The average day length in January is 8h and 44min.

When are sunrise and sunset in January in Heidelberg?

On the first day of January in Heidelberg, sunrise is at 08:20 and sunset at 16:36. On the last day of the month, sunrise is at 07:58 and sunset at 17:19 CET.

How long on average sun shines in January in Heidelberg?

The average sunshine duration in January in Heidelberg is 4.2h.

When is the lowest UV index in Heidelberg?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Heidelberg.

How high is the UV index in January in Heidelberg?

In Heidelberg, Germany, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Heidelberg, Germany

Average temperature in January - Heidelberg, Germany
  • Average high temperature in January: 4°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 January: -0.3°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 January
Heidelberg, Germany

Average pressure in January - Heidelberg, Germany
  • Average pressure in January: 1018.3mbar

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 January
Heidelberg, Germany

Average wind speed in January - Heidelberg, Germany
  • Average wind speed in January: 11.6km/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 January
Heidelberg, Germany

Average humidity in January - Heidelberg, Germany
  • Average humidity in January: 86%

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 January
Heidelberg, Germany

Average rainfall in January - Heidelberg, Germany
  • Average rainfall in January: 32mm

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 January
Heidelberg, Germany

Average rainfall days in January - Heidelberg, Germany
  • Average rainfall days in January: 13.3 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 January
Heidelberg, Germany

Average snowfall in January - Heidelberg, Germany
  • Average snowfall in January: 28mm

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 January
Heidelberg, Germany

Average snowfall days in January - Heidelberg, Germany
  • Average snowfall days in January: 5.4 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 January /
Average sunshine in January
Heidelberg, Germany

Average daylight in January / Average sunshine in January - Heidelberg, Germany
  • Average daylight in January: 8h and 44min

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 January: 4h and 12min

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 January
Heidelberg, Germany

Average sunshine days in January - Heidelberg, Germany
  • Average sunshine days in January: 13.3 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 January
Heidelberg, Germany

Average UV index in January - Heidelberg, Germany
  • Average UV index in January: 2

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 January
Heidelberg, Germany

Average cloud cover in January - Heidelberg, Germany
  • Average cloud cover in January: 57

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 January
Heidelberg, Germany

Average visibility in January - Heidelberg, Germany
  • Average visibility in January: 8km

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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