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Climate and Average Weather Year Round at Nelson Airport New Zealand

At Nelson Airport, the summers are comfortable, the winters are cold and wet, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 39°F to 72°F and is rarely below 32°F or above 78°F.

Based on the tourism score, the best time of year to visit Nelson Airport for warm-weather activities is from early January to early March.

Climate at Nelson Airport

comfortablecoolcoldcoolcomfortableJanFebMarAprMayJunJulAugSepOctNovDecNowNow68%68%54%54%clearovercastprecipitation: 3.3 inprecipitation: 3.3 in2.1 in2.1 inmuggy: 6%muggy: 6%0%0%drydrytourism score: 6.4tourism score: 6.40.20.2
Nelson Airport weather by month. Click on each chart for more information.

Average Temperature at Nelson Airport

The warm season lasts for 3.2 months, from December 13 to March 21, with an average daily high temperature above 68°F. The hottest day of the year is January 29, with an average high of 72°F and low of 59°F.

The cool season lasts for 3.1 months, from May 30 to September 4, with an average daily high temperature below 57°F. The coldest day of the year is July 13, with an average low of 39°F and high of 53°F.

Average High and Low Temperature at Nelson Airport

Average High and Low Temperature at Nelson AirportwarmcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJul 1353°FJul 1353°FJan 2972°FJan 2972°F39°F39°F59°F59°FDec 1368°FDec 1368°FMar 2168°FMar 2168°FMay 3057°FMay 3057°FSep 457°FSep 457°F56°F56°F55°F55°F44°F44°F44°F44°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature at Nelson Airport

Average Hourly Temperature at Nelson AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowvery coldcoldcoolcoolcomfortablevery coldcomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Arrifana, Portugal (12,357 miles away) is the far-away foreign place with temperatures most similar to Nelson Airport (view comparison).

Compare Nelson Airport to another city:

Clouds

At Nelson Airport, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year at Nelson Airport begins around January 21 and lasts for 3.1 months, ending around April 26. On March 5, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 68% of the time, and overcast or mostly cloudy 32% of the time.

The cloudier part of the year begins around April 26 and lasts for 8.9 months, ending around January 21. On December 15, the cloudiest day of the year, the sky is overcast or mostly cloudy 46% of the time, and clear, mostly clear, or partly cloudy 54% of the time.

Cloud Cover Categories at Nelson Airport

Cloud Cover Categories at Nelson AirportclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Mar 568%Mar 568%Dec 1554%Dec 1554%Jan 2161%Jan 2161%Apr 2661%Apr 2661%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Nelson Airport varies throughout the year.

The wetter season lasts 7.9 months, from May 3 to January 1, with a greater than 25% chance of a given day being a wet day. The chance of a wet day peaks at 33% on October 9.

The drier season lasts 4.1 months, from January 1 to May 3. The smallest chance of a wet day is 19% on February 11.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 33% on October 9.

Daily Chance of Precipitation at Nelson Airport

Daily Chance of Precipitation at Nelson AirportwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Oct 933%Oct 933%Feb 1119%Feb 1119%Jan 126%Jan 126%May 326%May 326%NowNowrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Nelson Airport experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year at Nelson Airport. The most rain falls during the 31 days centered around June 12, with an average total accumulation of 3.3 inches.

The least rain falls around February 9, with an average total accumulation of 2.1 inches.

Average Monthly Rainfall at Nelson Airport

Average Monthly Rainfall at Nelson AirportJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 inJun 123.3 inJun 123.3 inFeb 92.1 inFeb 92.1 inOct 22.8 inOct 22.8 inDec 172.8 inDec 172.8 inNowNow
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

The length of the day at Nelson Airport varies significantly over the course of the year. In 2021, the shortest day is June 21, with 9 hours, 11 minutes of daylight; the longest day is December 22, with 15 hours, 10 minutes of daylight.

Hours of Daylight and Twilight at Nelson Airport

Hours of Daylight and Twilight at Nelson AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minSep 2312 hr, 7 minSep 2315 hr, 10 minDec 2215 hr, 10 minDec 2212 hr, 10 minMar 2012 hr, 10 minMar 209 hr, 11 minJun 219 hr, 11 minJun 21daydaynightNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 5:47 AM on December 9, and the latest sunrise is 2 hours, 7 minutes later at 7:53 AM on June 28. The earliest sunset is at 5:03 PM on June 14, and the latest sunset is 4 hours, 0 minutes later at 9:03 PM on January 4.

Daylight saving time (DST) is observed at Nelson Airport during 2021, starting in the spring on September 26 and ending in the fall on April 4.

Sunrise & Sunset with Twilight and Daylight Saving Time at Nelson Airport

Sunrise & Sunset with Twilight and Daylight Saving Time at Nelson AirportJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMDec 95:47 AMDec 95:47 AM9:03 PMJan 49:03 PMJan 4Jun 145:03 PMJun 145:03 PM7:53 AMJun 287:53 AMJun 28DSTApr 4DSTApr 4Sep 26DSTSep 26DSTdaynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Moon

The figure below presents a compact representation of key lunar data for 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases at Nelson Airport

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

Humidity

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The perceived humidity level at Nelson Airport, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, staying within 3% of 3% throughout.

Humidity Comfort Levels at Nelson Airport

Humidity Comfort Levels at Nelson AirportJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Aug 20%Aug 20%Feb 56%Feb 56%NowNowcomfortablecomfortabledrydryhumidhumid
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed at Nelson Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 4.0 months, from September 12 to January 13, with average wind speeds of more than 6.3 miles per hour. The windiest day of the year is October 8, with an average hourly wind speed of 6.9 miles per hour.

The calmer time of year lasts for 8.0 months, from January 13 to September 12. The calmest day of the year is February 11, with an average hourly wind speed of 5.7 miles per hour.

Average Wind Speed at Nelson Airport

Average Wind Speed at Nelson AirportwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mph9 mph9 mph10 mph10 mph11 mph11 mphOct 86.9 mphOct 86.9 mphFeb 115.7 mphFeb 115.7 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction at Nelson Airport is from the west throughout the year.

Wind Direction at Nelson Airport

Wind Direction at Nelson AirportJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsouthnortheast
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Nelson Airport is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.9 months, from January 1 to March 30, with an average temperature above 63°F. The day of the year with the warmest water is February 15, with an average temperature of 66°F.

The time of year with cooler water lasts for 3.6 months, from June 20 to October 7, with an average temperature below 56°F. The day of the year with the coolest water is August 10, with an average temperature of 53°F.

Average Water Temperature at Nelson Airport

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is at Nelson Airport throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Nelson Airport for general outdoor tourist activities is from early January to early March, with a peak score in the second week of February.

Tourism Score at Nelson Airport

Tourism Score at Nelson Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.46.40.20.2NowNowprecipitationprecipitationcloudscloudstemperaturetemperature tourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Nelson Airport for hot-weather activities is from mid January to mid February, with a peak score in the last week of January.

Beach/Pool Score at Nelson Airport

Beach/Pool Score at Nelson AirportJanFebMarAprMayJunJulAugSepOctNovDec002244668810101.01.00.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Growing Season

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season at Nelson Airport typically lasts for 11 months (340 days), from around July 20 to around June 25, rarely starting after August 23, or ending before May 28.

Time Spent in Various Temperature Bands and the Growing Season at Nelson Airport

Time Spent in Various Temperature Bands and the Growing Season at Nelson Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Jul 2050%Jul 2050%Jun 2550%Jun 2590%Aug 2390%Aug 2390%May 2890%May 28Jan 15100%Jan 15100%NowNowvery coldcoldcoolcomfortablewarm
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms at Nelson Airport should appear around September 10, only rarely appearing before August 31 or after September 24.

Growing Degree Days at Nelson Airport

Growing Degree Days at Nelson AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°FSep 1090°FSep 1090°FDec 26900°FDec 26900°FJun 302,560°FJun 302,560°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.4 months, from November 3 to February 16, with an average daily incident shortwave energy per square meter above 6.5 kWh. The brightest day of the year is January 4, with an average of 7.7 kWh.

The darker period of the year lasts for 3.7 months, from April 30 to August 19, with an average daily incident shortwave energy per square meter below 2.9 kWh. The darkest day of the year is June 22, with an average of 1.7 kWh.

Average Daily Incident Shortwave Solar Energy at Nelson Airport

Average Daily Incident Shortwave Solar Energy at Nelson AirportbrightbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh10 kWh10 kWhJan 47.7 kWhJan 47.7 kWhJun 221.7 kWhJun 221.7 kWhNov 36.5 kWhNov 36.5 kWhApr 302.9 kWhApr 302.9 kWhAug 192.9 kWhAug 192.9 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Nelson Airport are -41.297 deg latitude, 173.224 deg longitude, and 13 ft elevation.

The topography within 2 miles of Nelson Airport contains significant variations in elevation, with a maximum elevation change of 607 feet and an average elevation above sea level of 62 feet. Within 10 miles contains significant variations in elevation (4,173 feet). Within 50 miles also contains extreme variations in elevation (7,080 feet).

The area within 2 miles of Nelson Airport is covered by water (54%) and grassland (41%), within 10 miles by water (39%) and trees (38%), and within 50 miles by trees (44%) and water (30%).

Data Sources

This report illustrates the typical weather at Nelson Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

Nelson Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

In this case, the only station close and reliable enough to use as a fallback is Wellington International Airport.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.