December weather forecast
Milford Sound, New Zealand

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Weather in December

In December, Milford Sound is teeming with life. The radiant summer days make for perfect exploration of the natural bounties in the area. Days are at their longest while temperatures rise, making every moment seem to last longer. At this time, the UV index peaks to 10, cautioning inhabitants and visitors alike to take sun protection measures. With sparkling sunshine and soothing winds, December makes for an enchanting end to the year.

Temperature

December's weather records an average high-temperature of a still refreshing 17.5°C (63.5°F), showing little deviation from November. Milford Sound reports a consistent average low-temperature of 9.5°C (49.1°F) throughout December nights.

Humidity

December is the least humid month, with an average relative humidity of 85.3%.

Rainfall

In December, in Milford Sound, the rain falls for 16.5 days. Throughout December, 595mm (23.43") of precipitation is accumulated. In Milford Sound, during the entire year, the rain falls for 184 days and collects up to 6428mm (253.07") of precipitation.

Sea temperature

In Milford Sound, in December, the average water temperature is 14°C (57.2°F).
Note: Immersing oneself in 14°C (57.2°F) at sub-10°C (14°F) temperatures is a recipe for harsh cold shock and quickened breathing unless adequately equipped.

Daylight

December has the longest days of the year, with an average of 15h and 30min of daylight.
On the first day of December in Milford Sound, sunrise is at 5:58 am and sunset at 9:16 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 9:36 pm NZDT.

Sunshine

The average sunshine in December in Milford Sound is 6h.

UV index

January and December, with an average maximum UV index of 10, are months with the highest UV index in Milford Sound. A UV Index reading of 8 to 10 represents a very high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 10 during December translates into these guidelines:
Always be cautious. Skin and eyes can be affected swiftly without protection. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Enhance your sun protection with tightly woven, yet airy clothing.
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Frequently asked questions

What is the average December temperature in Milford Sound?

In December, in Milford Sound, the average high-temperature is 17.5°C (63.5°F), and the average low-temperature is 9.5°C (49.1°F).

What is the least humid month in Milford Sound?

The least humid month is December, with an average relative humidity of 85.3%.

What is the average humidity in December in Milford Sound?

In Milford Sound, New Zealand, the average relative humidity in December is 85.3%.

How many days does it rain in December in Milford Sound?

In Milford Sound, in December, during 16.5 rainfall days, 595mm (23.43") of precipitation is typically accumulated.

How cold is the water in December in Milford Sound?

In Milford Sound, New Zealand, in December, the average water temperature is 14°C (57.2°F). Swimming in 14°C (57.2°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

When are the longest days in Milford Sound?

With an average of 15h and 30min of daylight, December has the longest days of the year in Milford Sound.

How many hours of daylight does Milford Sound have in December?

In Milford Sound, the average day length in December is 15h and 30min.

When are sunrise and sunset in December in Milford Sound?

On the first day of December, sunrise is at 5:58 am and sunset at 9:16 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 9:36 pm NZDT.

How long on average sun shines in December in Milford Sound?

In Milford Sound, the average sunshine duration in December is 6h.

What is the month with the highest UV index in Milford Sound?

January and December, with an average maximum UV index of 10, are months with the highest UV index in Milford Sound, New Zealand.

What is the UV index reading in December in Milford Sound?

In December, the average daily maximum UV index in Milford Sound, New Zealand, is 10. A UV Index of 8 to 10 symbolizes a very high health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in December
Milford Sound, New Zealand

Average temperature in December - Milford Sound, New Zealand
  • Average high temperature in December: 17.5°C

The warmest month (with the highest average high temperature) is February (19°C).
The month with the lowest average high temperature is July (9.3°C).

  • Average low temperature in December: 9.5°C

The month with the highest average low temperature is February (10.4°C).
The coldest month (with the lowest average low temperature) is July (1.5°C).

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Average humidity in December
Milford Sound, New Zealand

Average humidity in December - Milford Sound, New Zealand
  • Average humidity in December: 85.3%

The month with the highest relative humidity is April (91.9%).
The month with the lowest relative humidity is December (85.3%).

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Average rainfall in December
Milford Sound, New Zealand

Average rainfall in December - Milford Sound, New Zealand
  • Average rainfall in December: 595mm

The wettest month (with the highest rainfall) is January (632.8mm).
The driest month (with the least rainfall) is July (393.9mm).

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Average rainfall days in December
Milford Sound, New Zealand

Average rainfall days in December - Milford Sound, New Zealand
  • Average rainfall days in December: 16.5 days

The month with the highest number of rainy days is October (18 days).
The month with the least rainy days is February (13.1 days).

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Average sea temperature in December
Milford Sound, New Zealand

Average sea temperature in December - Milford Sound, New Zealand
  • Average sea temperature in December: 14°C

The best months for swimming (with the highest average sea temperature) are January, February and March (16°C).
The coldest months (with the lowest average sea temperature) are July, August, September and October (12°C).

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Average daylight in December /
Average sunshine in December
Milford Sound, New Zealand

Average daylight in December / Average sunshine in December - Milford Sound, New Zealand
  • Average daylight in December: 15h and 3min

The month with the longest days is December (Average daylight: 15h and 30min).
The month with the shortest days is June (Average daylight: 8h and 54min).

  • Average sunshine in December: 6h

The month with the most sunshine is January (Average sunshine: 7h).
The months with the least sunshine are June and July (Average sunshine: 2h).

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Average UV index in December
Milford Sound, New Zealand

Average UV index in December - Milford Sound, New Zealand
  • Average UV index in December: 10

The months with the highest UV index are January and December (UV index 10).
The months with the lowest UV index are June and July (UV index 1).

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Milford Sound, New Zealand

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