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Contents
- The climate of Chatham Islands
- The best time to visit Chatham Islands
- The worst time to visit Chatham Islands
- Spring weather in Chatham Islands
- Summer weather in Chatham Islands
- Autumn weather in Chatham Islands
- Winter weather in Chatham Islands
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average humidity
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average UV index
The sandstone cliffs located in the Chatham Islands in New Zealand
The climate of Chatham Islands
Chatham Islands, located in New Zealand, exhibits a Marine west coast, warm summer climate as classified by the Köppen system, known as Cfb. Unraveling its climate story, relativity stable and consistent conditions frame the region's annual weather. Temperature variations throughout the year are minimal, giving a steady comfort level.
The highest average sweeping from 17.9°C (64.2°F) in January to a slightly milder 10.5°C (50.9°F) in July. Nights tend to be cooler, with lowest average temperatures ranging from 5.9°C (42.6°F) in July to 12.3°C (54.1°F) in February. The annual humidity rates sustain around mid-80%, marking the region as relatively moist. Precipitation falls throughout the year, with July receiving the highest average rainfall of 108mm (4.25") over approximately 16 days. Conversely, January has the least rainy days with about 7.9.
Sunshine hours decrease as the year progresses, manifesting in fewer daylight hours. From a yearly peak of 15 hours per day in January, it declines to as few as 8.9 hours per day in June. The UV Index in Chatham Islands varies significantly over the course of the year, with a high risk of harm from unprotected sun exposure in January with 10 and the lowest in June, registering only 1 on the UV index.
The highest average sweeping from 17.9°C (64.2°F) in January to a slightly milder 10.5°C (50.9°F) in July. Nights tend to be cooler, with lowest average temperatures ranging from 5.9°C (42.6°F) in July to 12.3°C (54.1°F) in February. The annual humidity rates sustain around mid-80%, marking the region as relatively moist. Precipitation falls throughout the year, with July receiving the highest average rainfall of 108mm (4.25") over approximately 16 days. Conversely, January has the least rainy days with about 7.9.
Sunshine hours decrease as the year progresses, manifesting in fewer daylight hours. From a yearly peak of 15 hours per day in January, it declines to as few as 8.9 hours per day in June. The UV Index in Chatham Islands varies significantly over the course of the year, with a high risk of harm from unprotected sun exposure in January with 10 and the lowest in June, registering only 1 on the UV index.
The best time to visit Chatham Islands
The recommendable period to visit Chatham Islands would be during the warmer months from December to March when the temperatures remain pleasantly within the range of 11.3°C (52.3°F) to 18.2°C (64.8°F). During this period, the daylight duration peaks between 13.4 hours to 15.4 hours, and the sea temperature is quite pleasing, oscillating from 13°C (55.4°F) to 17°C (62.6°F), which makes it an excellent time for coastal explorations and water activities.
The worst time to visit Chatham Islands
The period from June to August might be perceived as less favorable for visiting Chatham Islands. During these months, the country experiences its coldest temperatures, dipping to between 5.9°C (42.6°F) to 6.8°C (44.2°F), with only 8.9 hours to 9.3 hours of daylight. The rainfall reaches its zenith in June, with an average of 108mm (4.25") precipitation spread over 16 days.
Spring weather in Chatham Islands
Spring months, from September to November, illustrate a mild transition in Chatham Islands. The average high temperatures range from 11.9°C (53.4°F) to 14.4°C (57.9°F), slowly warming after the chilly winter months. The daily low temperatures can fluctuate from 6.9°C (44.4°F) to 9.1°C (48.4°F). Rainfall amounts start decreasing post-winter with an average delivery of 67mm (2.64") to 71mm (2.8") over 9.8 to 11.9 days. Daylight increases gradually, extending from 11.9 hours to 14.7 hours.
Summer weather in Chatham Islands
From December to February, the islands experience their warmest period. High temperatures in summer average from 14.9°C (58.8°F) to 18.1°C (64.6°F), with the nightly temperature falling to between 9.1°C (48.4°F) to 12.3°C (54.1°F). The humidity hovers between 82.2% to 83.5% throughout this period. Rainfall levels during these months are less compared to others, ranging from 55mm (2.17") to 64mm (2.52"). The daylight hours climb to their zenith, between 13.8 hours to 15.4 hours, providing long sunny days.
Autumn weather in Chatham Islands
During the autumn months, from March to May, temperatures start to dip again in Chatham Islands. The day's highest temperatures reluctantly retreat from 17.1°C (62.8°F) to 13°C (55.4°F). Correspondingly, the average low temperatures also observe a downward trend from 11.5°C (52.7°F) to 8.1°C (46.6°F). Autumn is generally a wet season, with rainfall averaging between 76mm (2.99") to 88mm (3.46"). Meanwhile, the length of the days begins to shorten, with daylight hours progressing from 12.3 hours to 9.6 hours.
Winter weather in Chatham Islands
The winter months of June to August in Chatham Islands endure cooler weather. The highest temperatures fluctuate between 10.5°C (50.9°F) to 11.3°C (52.3°F), while the lows nestle in a comfort band of 5.9°C (42.6°F) to 6.8°C (44.2°F). The region tends to receive the most rainfall during winter, with totals fluctuating between 84mm (3.31") to 108mm (4.25"). Daylight hours at this time take a tumble, registering values from 8.9 hours to 9.3 hours. Even though it's the coldest period, the climate remains relatively mild compared to many other regions in New Zealand.
Weather in January
January starts the year with relatively warm climate on the Chatham Islands with an average high temperature within the range of 16.4°C (61.5°F) to 18.2°C (64.8°F). The month experiences moderate sea temperature that invites all the fishing enthusiasts. Weather in January »
Weather in February
As the February approaches, a gradual decrease in temperature becomes noticeable on the Chatham Islands, albeit the weather remaining overall pleasant. Here, rainfall is akin to an uninvited guest that knocks on the door rather frequently, averaging at approximately 64mm (2.52"). Weather in February »
Weather in March
As the third month of the year makes its appearance, the weather in Chatham Islands sees almost a stability in the high temperature but the lows show a dip. Notably, March reports the highest rainfall during the year, with an average of 85mm (3.35"). Weather in March »
Weather in April
Enter April, and the onset of autumn manifests in the form of falling temperatures in Chatham Islands. The island still expects to receive a fair share of rainfall, with an average precipitation level marked at around 76mm (2.99"). Weather in April »
Weather in May
In May, Chatham Islands witnesses a marked change in the weather, bringing the chill of approaching winter. The coolest among the first half of the year, the month sees decrease in temperature. With rainfall expecting to scale up to 88mm (3.46"), it remains the month with most downpour in the first semester of the year. Weather in May »
Weather in June
June signals the onset of winter on the Chatham Islands, reflected clearly by a significant dip in the temperature. The recorded rainfall during this month takes off to the highest yearly figure, an average of 108mm (4.25"). Escalated humidity acquires a steadiness and helps maintaining quite a steady atmosphere. Weather in June »
Weather in July
July in Chatham Islands brings along chillier climes, recording the year's lowest temperature. Rain showers can be expected almost half the time, with an average accumulated rainfall of around 85mm (3.35"). Furthermore, while retaining the amplified levels of humidity, the shortest sunshine duration is recorded this month. Weather in July »
Weather in August
By August, the Chatham Islands begins its transition from the harsh winters to the warmer spring season with a mild rise in temperature. Despite the slight rise in rainfall to around 84mm (3.31"), the prevailing conditions generally maintain their wet trend. Weather in August »
Weather in September
September ushers in spring and a rise in temperature on the Chatham Islands, designated by a notable swift from the waning winter. 71mm (2.8") of rainfall observed on the islands falls short of the winter deluge, but remains significant nonetheless. Weather in September »
Weather in October
October in Chatham Islands spells out clear skies with the departure of the hitherto persistent rains. The month sees a substantial decrease in rainfall, from above 70mm (2.76") to a more moderate figure of about 63mm (2.48"). A striking attribute of October is the noticeable daylight hour extension, a favourable condition to explore the island. Weather in October »
Weather in November
November reveals a steady climb in climatic conditions with the island experiencing a favorable warming trend. As the year winds up, expectations of rain in November taper off to around 67mm (2.64"), a drop since the last month. Weather in November »
Weather in December
December marks the advent of summer, bringing with it an upswing in the island's temperature readings. As the year comes to a close, there are showers expected intermittently, with recorded average rainfall of around 66mm (2.6"). Weather in December »
[Resources]Frequently asked questions
What is the least humid month in Chatham Islands?
With an average relative humidity of 82.2%, January is the least humid month in Chatham Islands.
What is the driest month in Chatham Islands?
January is the month with the least rainfall. Rain falls for 7.9 days and accumulates 55mm (2.17") of precipitation.
How much does it rain in Chatham Islands?
Throughout the year, in Chatham Islands, New Zealand, there are 140 rainfall days, and 912mm (35.91") of precipitation is accumulated.
What month has the most sunshine in Chatham Islands?
The month with the most sunshine in Chatham Islands is January, with an average of 6.2h of sunshine.
When is the highest UV index in Chatham Islands?
January and December, with an average maximum UV index of 10, are months with the highest UV index.
What is the warmest month in Chatham Islands?
February is the warmest month in Chatham Islands, exhibiting average temperatures of 18.2°C (64.8°F) at the peak and 12.3°C (54.1°F) at the base.
What month is the sea warmest in Chatham Islands?
February is the month with the warmest seawater in Chatham Islands, with an average sea temperature of 17°C (62.6°F).
When is Daylight Saving Time (DST) in Chatham Islands?
On Sunday, 07. April 2024, at 3:45 am, Daylight Saving Time ends, and the time zone changes from +1345 to +1245. The next Daylight Saving Time starts on Sunday, 29. September 2024, at 2:45 am, and the time zone reverts from +1245 to +1345.
What is the rainiest month in Chatham Islands?
June is the month with the most rainfall in Chatham Islands, New Zealand. Rain falls for 16 days and accumulates 108mm (4.25") of precipitation.
What is the month with the shortest days in Chatham Islands?
With an average of 9h and 0min of daylight, June has the shortest days of the year.
What is the month with the least sunshine in Chatham Islands?
With an average of 2.1h of sunshine, June has the least sunshine of the year.
What are the months with the lowest UV index in Chatham Islands?
The months with the lowest UV index in Chatham Islands are June and July, with an average maximum UV index of 1.
What part of the year is the coldest in Chatham Islands?
July stands out as Chatham Islands's coldest month, with temperatures ranging between an average high of 10.5°C (50.9°F) and a low of 5.9°C (42.6°F).
What is the most humid month in Chatham Islands?
July is the most humid month in Chatham Islands, with an average relative humidity of 86.9%.
When is the sea coldest in Chatham Islands?
August and September, with an average sea temperature of 11°C (51.8°F), are months with the coldest seawater in Chatham Islands, New Zealand.
When are the longest days in Chatham Islands?
December has the longest days of the year, with an average of 15h and 24min of daylight.
Average temperature
Chatham Islands, New Zealand
The warmest month (with the highest average high temperature) is February (18.2°C).
The month with the lowest average high temperature is July (10.5°C).
The month with the highest average low temperature is February (12.3°C).
The coldest month (with the lowest average low temperature) is July (5.9°C).
Average humidity
Chatham Islands, New Zealand
- Average humidity in January:
82.2% - Average humidity in February:
83.5% - Average humidity in March:
83.2% - Average humidity in April:
83.4% - Average humidity in May:
85.7% - Average humidity in June:
85.8%
The month with the highest relative humidity is July (86.9%).
The month with the lowest relative humidity is January (82.2%).
Average rainfall
Chatham Islands, New Zealand
- Average rainfall in January:
54.9mm - Average rainfall in February:
63.9mm - Average rainfall in March:
84.7mm - Average rainfall in April:
75.7mm - Average rainfall in May:
87.9mm - Average rainfall in June:
107.8mm
- Average rainfall in July:
84.7mm - Average rainfall in August:
84.4mm - Average rainfall in September:
71.1mm - Average rainfall in October:
63.4mm - Average rainfall in November:
66.7mm - Average rainfall in December:
66.3mm
The wettest month (with the highest rainfall) is June (107.8mm).
The driest month (with the least rainfall) is January (54.9mm).
Average rainfall days
Chatham Islands, New Zealand
- Average rainfall days in January:
7.9 days - Average rainfall days in February:
7.7 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
11.1 days - Average rainfall days in May:
14.4 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
14.8 days - Average rainfall days in August:
14.5 days - Average rainfall days in September:
11.9 days - Average rainfall days in October:
11.2 days - Average rainfall days in November:
9.8 days - Average rainfall days in December:
9.4 days
The month with the highest number of rainy days is June (16 days).
The month with the least rainy days is February (7.7 days).
Average sea temperature
Chatham Islands, New Zealand
The best month for swimming (with the highest average sea temperature) is February (17°C).
The coldest months (with the lowest average sea temperature) are August and September (11°C).
Average daylight / Average sunshine
Chatham Islands, New Zealand
- Average daylight in January:
15h and 0min - 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 4min - Average daylight in June:
9h and 0min
- Average daylight in July:
9h and 2min - 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 2min
The month with the longest days is December (Average daylight: 15h and 24min).
The month with the shortest days is June (Average daylight: 9h and 0min).
- Average sunshine in January:
6h and 1min - Average sunshine in February:
5h and 1min - Average sunshine in March:
4h and 0min - Average sunshine in April:
3h and 3min - Average sunshine in May:
2h and 4min - Average sunshine in June:
2h and 1min
- Average sunshine in July:
2h and 2min - Average sunshine in August:
3h and 2min - Average sunshine in September:
3h and 4min - Average sunshine in October:
4h and 1min - Average sunshine in November:
5h and 0min - Average sunshine in December:
5h and 2min
The month with the most sunshine is January (Average sunshine: 6h and 12min).
The month with the least sunshine is June (Average sunshine: 2h and 6min).
Average UV index
Chatham Islands, 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).
Chatham Islands, New Zealand
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