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Average Weather For Wellington, New Zealand

Location

This report describes the typical weather at the Wellington International Airport (Wellington, New Zealand) weather station over the course of an average year. It is based on the historical records from 1990 to 2012. Earlier records are either unavailable or unreliable.

Wellington has a mild humid temperate climate with warm summers and no dry season. The area within 25 mi of this station is covered by oceans and seas (67%), grasslands (26%), and built-up areas (3%).

Temperature

Over the course of a year, the temperature typically varies from 45°F to 69°F and is rarely below 38°F or above 75°F.

Daily High and Low Temperature

The daily average low (blue) and high (red) temperature with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

The warm season lasts from December 16 to March 19 with an average daily high temperature above 66°F. The hottest day of the year is January 28, with an average high of 69°F and low of 58°F.

The cold season lasts from June 2 to September 7 with an average daily high temperature below 57°F. The coldest day of the year is July 11, with an average low of 45°F and high of 54°F.

Fraction of Time Spent in Various Temperature Bands

The average fraction of time spent in various temperature bands: frigid (below 15°F), freezing (15°F to 32°F), cold (32°F to 50°F), cool (50°F to 65°F), comfortable (65°F to 75°F), warm (75°F to 85°F), hot (85°F to 100°F) and sweltering (above 100°F).
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March 2017
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April 2017
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May 2017
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June 2017
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July 2017
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August 2017
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September 2017
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January 2018
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Sun

The length of the day varies significantly over the course of the year. The shortest day is June 20 with 9:11 hours of daylight; the longest day is December 21 with 15:10 hours of daylight.

Daily Hours of Daylight and Twilight

The number of hours during which the Sun is visible (black line), with various degrees of daylight, twilight, and night, indicated by the color bands. From bottom (most yellow) to top (most gray): full daylight, solar twilight (Sun is visible but less than 6° from the horizon), civil twilight (Sun is not visible but is less than 6° below the horizon), nautical twilight (Sun is between 6° and 12° below the horizon), astronomical twilight (Sun is between 12° and 18° below the horizon), and full night.

The earliest sunrise is at 5:41am on December 10 and the latest sunset is at 8:58pm on January 6. The latest sunrise is at 7:48am on June 27 and the earliest sunset is at 4:57pm on June 15.

Daylight savings time (DST) is observed in this location during 2012, starting in the spring on September 30 and ending in the fall on April 1.

Daily Sunrise & Sunset with Twilight and Daylight Savings Time

The solar day over the course of the year 2012 . From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (solar, civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight savings time are indicated by the "DST" labels.

Clouds

The median cloud cover ranges from 56% (partly cloudy) to 71% (partly cloudy). The sky is cloudiest on November 26 and clearest on March 18. The clearer part of the year begins around January 25. The cloudier part of the year begins around May 13.

Median Cloud Cover

The median daily cloud cover (black line) with percentile bands (inner band from 40th to 60th percentile, outer band from 25th to 75th percentile).

On March 18, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 52% of the time, and overcast or mostly cloudy 33% of the time.

On November 26, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 62% of the time, and clear or mostly clear 23% of the time.

Cloud Cover Types

The fraction of time spent in each of the five sky cover categories. From top (most blue) to bottom (most gray), the categories are clear, mostly clear, partly cloudy, mostly cloudy, and overcast. Pink indicates missing data. Outside of the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data.

Precipitation

The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around June 23, occurring in 58% of days. Precipitation is least likely around March 18, occurring in 40% of days.

Probability of Precipitation at Some Point in the Day

The fraction of days in which various types of precipitation are observed. If more than one type of precipitation is reported in a given day, the more severe precipitation is counted. For example, if light rain is observed in the same day as a thunderstorm, that day counts towards the thunderstorm totals. The order of severity is from the top down in this graph, with the most severe at the bottom.

Over the entire year, the most common forms of precipitation are moderate rain and light rain.

Moderate rain is the most severe precipitation observed during 64% of those days with precipitation. It is most likely around June 22, when it is observed during 39% of all days.

Light rain is the most severe precipitation observed during 20% of those days with precipitation. It is most likely around November 17, when it is observed during 13% of all days.

Types of Precipitation Throughout the Year

Relative frequency of various types of precipitation over the course of a typical year.

During the warm season, which lasts from December 16 to March 19, there is a 43% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of moderate rain (57% of days with precipitation have at worst moderate rain), light rain (24%), drizzle (10%), and heavy rain (5%).

During the cold season, which lasts from June 2 to September 7, there is a 55% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of moderate rain (68% of days with precipitation have at worst moderate rain) and light rain (18%).

Warm Season Precipitation

Cold Season Precipitation

Relative frequency of various types of precipitation during the warm and cold seasons respectively.

Snow

Either snow is exceptionally unlikely to fall at any time during the year at this location or this station does not reliably report precipitation types.

Humidity

The relative humidity typically ranges from 58% (mildly humid) to 90% (very humid) over the course of the year, rarely dropping below 43% (comfortable) and reaching as high as 98% (very humid).

The air is driest around November 16, at which time the relative humidity drops below 65% (mildly humid) three days out of four; it is most humid around July 12, exceeding 86% (very humid) three days out of four.

Relative Humidity

The average daily high (blue) and low (brown) relative humidity with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

Dew Point

Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.

Over the course of a year, the dew point typically varies from 38°F (dry) to 59°F (comfortable) and is rarely below 32°F (dry) or above 65°F (mildy humid).

There are two periods in the year that are most comfortable: The first is between January 1 and May 25 and the second is between October 5 and December 31. The air feels neither too dry nor too muggy during these periods.

Dew Point

The daily average low (blue) and high (red) dew point with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

Wind

Over the course of the year typical wind speeds vary from 3 mph to 27 mph (light breeze to strong breeze), rarely exceeding 38 mph (high wind).

The highest average wind speed of 18 mph (fresh breeze) occurs around October 10, at which time the average daily maximum wind speed is 27 mph (strong breeze).

The lowest average wind speed of 14 mph (moderate breeze) occurs around July 25, at which time the average daily maximum wind speed is 22 mph (fresh breeze).

Wind Speed

The average daily minimum (red), maximum (green), and average (black) wind speed with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).
The wind is most often out of the north (46% of the time) and south (24% of the time). The wind is least often out of the west (1% of the time), east (1% of the time), north west (4% of the time), south west (4% of the time), and south east (5% of the time).

Wind Directions Over the Entire Year

The fraction of time spent with the wind blowing from the various directions over the entire year. Values do not sum to 100% because the wind direction is undefined when the wind speed is zero.

Fraction of Time Spent with Various Wind Directions

The fraction of time spent with the wind blowing from the various directions on a daily basis. Stacked values do not always sum to 100% because the wind direction is undefined when the wind speed is zero.