December weather forecast
Milford Sound, New Zealand

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.