Yearly & Monthly weather - Milford Sound, New Zealand

The climate of Milford Sound

Positioned within the South Island of New Zealand, Milford Sound experiences a Tundra climate, also identified as 'ET' in the Köppen climate classification. This distinct climate type, shaped by the rugged landscape's steep fjords and high peaks, presents a unique set of weather conditions. Daily sunlight hours fluctuate from 8.9 hours to 15.5 hours across a year, with meagre sunshine hours, notably from 2 hours up to 7 hours throughout each month. Solar UV indexes sway between 1, signaling very low risk sun exposure in winter months, up to 10, representing very high risk in summer.

Rainfall in Milford Sound is a pivotal climate attribute, underscored by its continuity throughout the year, spanning from 394mm (15.51") up to 633mm (24.92") of precipitation monthly. Coupled with high rainy days averaging between 13.1 days to 18 days each month, this prolific rainfall lends a unique character to the weather profile. Meanwhile, the relative humidity attests to the overall moist environment, sustaining a high span from 85.3% to 91.9% across the calendar months.

The terrain of Milford Sound is cooled by its proximity to the sea, recording low to mid-range temperatures. Annual temperature variates from 1.5°C (34.7°F) in frigid lows during winter, to highs reaching 19°C (66.2°F) in the warmest summer months. Sea temperatures mirror the terrestrial temperature trends, displaying a slight decrease from 14°C (57.2°F) to 12°C (53.6°F) through the cooler part of the year, before rising again.

The best time to visit Milford Sound

The optimal visiting period for Milford Sound hinges on a balance between rainfall and temperature. With this consideration, the months from January to March emerge as favourable with temperatures peaking near 19°C (66.2°F). Relatively shorter rainy days between 13.1 and 14.7 days, coupled with sea temperatures around 16°C (60.8°F) and daylight hours around 13.9 hours to 12.4 hours, make these months desirable for outdoor and water activities.

The worst time to visit Milford Sound

On the flip side, the colder months from June through to August may prove challenging for visitors. The lower temperatures dropping down to 1.5°C (34.7°F), coupled with long rainy spells across 14 days to 15.3 days, shorter daylight periods from 8.9 hours to 10.3 hours, and sea temperatures plunging to 12°C (53.6°F), it makes outdoor exploration less appealing.

Spring weather in Milford Sound

Spring in Milford Sound, encompassing September to November, brings in a gradual warming trend with temperature highs oscillating from 12.9°C (55.2°F) to 15.7°C (60.3°F), and lows hovering between 4.1°C (39.4°F) to 7.5°C (45.5°F). Rainfall heightens over these months, from 540mm (21.26") in September to 567mm (22.32") in November, marked by the increase in rainy days from 16.5 days to 16.2 days. Daylight starts lengthening from 11.8 hours in September, reaching 14.7 hours by November, enhancing the overall visibility.

Summer weather in Milford Sound

Summers between December and February present the warmest conditions in Milford Sound. Temperature highs ascend from 17.5°C (63.5°F) in December to a peak of 19°C (66.2°F) in January, then decrease to 17.7°C (63.9°F) in February. Correspondingly, temperature lows follow, varying from 9.5°C (49.1°F) to 10.4°C (50.7°F). Rainfall volumes shift from 595mm (23.43") in December, drop to 500mm (19.69") in January, and rise again to 601mm (23.66") in February. The number of rainy days sees slight fluctuation, remaining near 14.7 with slight variation, complimented by long daylight periods stretching from 15.5 hours to 13.9 hours over the summer months.

Autumn weather in Milford Sound

The Autumn climate from March to May in Milford Sound witnesses a cooling trend with temperatures sliding from highs of 17.7°C (63.9°F) to 12.4°C (54.3°F) and lows dropping from 9.2°C (48.6°F) to 4.4°C (39.9°F). Rainfall sees an upward drift from a lower of 548mm (21.57") in March to a higher of 566mm (22.28") in May, while rainy days hover around 15. Daylight duration shrinks from 12.4 hours to 9.5 hours, indicating shorter days and lessened outdoor viewing potential.

Winter weather in Milford Sound

Winter from June to August introduces the coldest period in Milford Sound. High temperatures waver between 9.5°C (49.1°F) and 11.2°C (52.2°F) while the lows plummet to frosty ranges from 2.1°C (35.8°F) to 1.5°C (34.7°F). Rainfall ranges from 424mm (16.69") to 429mm (16.89") maintaining a constant along with rainy days between 14 to 15.3. Daylight hours fall to their shortest in June at 8.9 hours, then begin the ascent back to 10.3 hours by August, offering limited daylight to visitors during these months.

Weather in January

January sees a shift from the chill of the previous year, hosting a comfortable climate with increased rainfall. This further enriches the verdant landscapes of Milford Sound, encouraging fresh growth in the local fauna. Though the beginning of the year, it features some of the most agreeable weather, setting the stage for an enjoyable outdoor experience. Weather in January »

Weather in February

As the calendar progresses into February, the weather reaches a balanced mixture of warmth and rain. This intertwining of conditions allows for a breathtakingly lush environment, a true testament to New Zealand’s natural beauty. Weather in February »

Weather in March

March brings about a slight reduction in temperature from the previous month, though the vibrant atmosphere remains. As the season starts its descent into autumn, the local wildlife begins its preparations. This subtly changing environment sparks a unique charm within Milford Sound. Weather in March »

Weather in April

Entering April, a profound change in the weather pattern takes root. The shift from March is marked by dwindling temperatures and shifts in the natural landscape. As the days shorten, it signals the onset of the cool weather, adding a crispness to the air. Weather in April »

Weather in May

A unique dimension of Milford Sound emerges in May, as the weather undergoes a serious transformation. This period is emblematic of the area's versatility, showcasing a marked decrease in temperatures. Visitors during this period witness the even more stunning majesty of the location. Weather in May »

Weather in June

June embraces the depth of winter, plunging the area into a fresh, crisp season. The shift from May is emphatic, introducing a significant departure in weather patterns. A serene, gentle snow blankets the landscape, transforming it into a white paradise. Weather in June »

Weather in July

In July, the winter season matures, presenting the coldest weather patterns of the year. Amid this chilly season, Milford Sound flaunts its ethereal scenery. Even though the weather is cold, the beauty of the area radiates warmth. The low temperature records a further dip, reaching a chilly low of 1.5°C (34.7°F). Weather in July »

Weather in August

As August arrives, there is a benign shift in the weather conditions. The stark winter peaks start to soften, making way for more temperate days. With the impending arrival of spring, the surroundings bristle with a blend of excitement and anticipation. Weather in August »

Weather in September

September signals the beginning of spring, infusing life into everything around. As the weather warms, the snow caps recede, revealing the green landscape below. This bursts of color energizes the soul, rejuvenating the local environment. Weather in September »

Weather in October

October presents a unique blend of comfortable temperatures meeting the return of heavy rain. It's a month that showcases the region in between its extremes, demonstrating its adaptability. The rising temperatures invite outdoor exploration, while rainfall nourishes the landscape. Weather in October »

Weather in November

As November arrives, the climate enhances, moving towards the beginnings of a warmer season. A stark change in daylight hours is clear from the bleak winter months, light now fills up to 14.7h of the day. This extended sunlight amplifies the beauty of the area, illuminating its stunning landscapes. Weather in November »

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. Weather in December »

Updated: Jan 27, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the rainiest month in Milford Sound?

January is the month with the most rainfall in Milford Sound, New Zealand. Rain falls for 15.7 days and accumulates 633mm (24.92") of precipitation.

How many days does it rain in Milford Sound?

Throughout the year, there are 184 rainfall days, and 6428mm (253.07") of precipitation is accumulated.

What months are the sea warmest in Milford Sound?

January through March, with an average sea temperature of 16°C (60.8°F), are months with the warmest seawater.

What month has the most sunshine in Milford Sound?

January has the most sunshine of the year, with an average of 7h of sunshine.

When is 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.

What is the warmest month in Milford Sound?

February is the warmest month of the year, registering average temperatures as high as 19°C (66.2°F) and as low as 10.4°C (50.7°F).

What is the most humid month in Milford Sound?

With an average relative humidity of 91.9%, April is the most humid month.

When is Daylight Saving Time (DST) in Milford Sound?

On Sunday, 07. April 2024, at 3:00 am, Daylight Saving Time ends in Milford Sound, and the time zone changes from NZDT to NZST. The next Daylight Saving Time starts on Sunday, 29. September 2024, at 2:00 am, and the time zone reverts from NZST to NZDT.

What is the month with the shortest days in Milford Sound?

June has the shortest days of the year, with an average of 8h and 54min of daylight.

What is the month with the least sunshine in Milford Sound?

The months with the least sunshine in Milford Sound are June and July, with an average of 2h of sunshine.

When is the lowest UV index in Milford Sound?

June and July, with an average maximum UV index of 1, are months with the lowest UV index.

What time of the year is the coldest in Milford Sound?

July is the coldest month of the year, registering average temperatures as high as 9.3°C (48.7°F) and as low as 1.5°C (34.7°F).

What is the driest month in Milford Sound?

The month with the least rainfall in Milford Sound, New Zealand, is July, when the rain falls for 13.8 days and typically collects 394mm (15.51") of precipitation.

When is the sea coldest in Milford Sound?

July through October, with an average sea temperature of 12°C (53.6°F), are months with the coldest seawater in Milford Sound, New Zealand.

What is the least humid month in Milford Sound?

The least humid month in Milford Sound, New Zealand, is December, with an average relative humidity of 85.3%.

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, New Zealand.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N D

Average temperature
Milford Sound, New Zealand

Average high temperature in January:
18.7°C
Average high temperature in February:
19°C
Average high temperature in March:
17.7°C
Average high temperature in April:
15.5°C
Average high temperature in May:
12.4°C
Average high temperature in June:
9.5°C

Average high temperature in July:
9.3°C
Average high temperature in August:
11.2°C
Average high temperature in September:
12.9°C
Average high temperature in October:
14.3°C
Average high temperature in November:
15.7°C
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 January:
10.3°C
Average low temperature in February:
10.4°C
Average low temperature in March:
9.2°C
Average low temperature in April:
6.9°C
Average low temperature in May:
4.4°C
Average low temperature in June:
2.1°C

Average low temperature in July:
1.5°C
Average low temperature in August:
2.4°C
Average low temperature in September:
4.1°C
Average low temperature in October:
5.9°C
Average low temperature in November:
7.5°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).

Average humidity
Milford Sound, New Zealand

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

Average rainfall
Milford Sound, New Zealand

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

Average rainfall days
Milford Sound, New Zealand

Average rainfall days in January:
15.7 days
Average rainfall days in February:
13.1 days
Average rainfall days in March:
14.7 days
Average rainfall days in April:
14.7 days
Average rainfall days in May:
15.5 days
Average rainfall days in June:
14 days

Average rainfall days in July:
13.8 days
Average rainfall days in August:
15.3 days
Average rainfall days in September:
16.5 days
Average rainfall days in October:
18 days
Average rainfall days in November:
16.2 days
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).

Average sea temperature
Milford Sound, New Zealand

Average sea temperature in January:
16°C
Average sea temperature in February:
16°C
Average sea temperature in March:
16°C
Average sea temperature in April:
15°C
Average sea temperature in May:
14°C
Average sea temperature in June:
13°C

Average sea temperature in July:
12°C
Average sea temperature in August:
12°C
Average sea temperature in September:
12°C
Average sea temperature in October:
12°C
Average sea temperature in November:
13°C
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).

Average daylight / Average sunshine
Milford Sound, New Zealand

Average daylight in January:
15h and 1min
Average daylight in February:
13h and 5min
Average daylight in March:
12h and 2min
Average daylight in April:
10h and 5min
Average daylight in May:
9h and 3min
Average daylight in June:
8h and 5min

Average daylight in July:
9h and 1min
Average daylight in August:
10h and 2min
Average daylight in September:
11h and 5min
Average daylight in October:
13h and 2min
Average daylight in November:
14h and 4min
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).

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

Average UV index
Milford Sound, New Zealand

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).

Climate and monthly weather forecastMilford Sound, New Zealand

Contents