Climate and average weather in Masterton

In Masterton, the summers are mild, showery, and partly cloudy and the winters are cool and partly cloudy.

Best: early December to mid April

Over the course of the year, the temperature in Masterton typically varies from 5°C to 20°C, and is rarely below 1°C or above 24°C. February is the hottest month of the year, while July is the coldest.

Based on the travel score, the best time of year to visit Masterton for warm-weather activities is from early December to mid April.

Hottest
Feb
20°
Coldest
Jul
Wettest
Oct
95 mm
Driest
May
62 mm
Rain / yr
937 mm
136 wet days
Daylight
9.1–14.9 h
shortest–longest
Elevation
103 m
41.0°S
Clearest
Feb
58% cloud

Masterton is town in Wellington Region, New Zealand.

Air quality
Moderate
PM2.5 11.7 µg/m³ · 2012
Founded
1854

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Masterton weather by month, at a glance

The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.

Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around early December to mid April.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Masterton, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

The hot season lasts 3.5 months, from December 12 to March 28, with daily high temperatures above 18°C. The hottest month of the year in Masterton is February, with an average high of 20°C and low of 13°C.

The cool season lasts 3.4 months, from May 29 to September 9, with daily high temperatures below 13°C. The coldest month of the year in Masterton is July, with an average low of 5°C and high of 11°C.

Days typically run about 7°C warmer than nights year-round.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2012
Feb2013
Mar1911
Apr169
May147
Jun125
Jul115
Aug115
Sep136
Oct148
Nov169
Dec1811

Average hourly temperature in Masterton

A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on February afternoons, near 20°C, and coldest before dawn in July, near C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Masterton weather by month

Every month at a glance. Click a month for its detailed page.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan20° / 12°6810.414.66.2
Feb20° / 13°678.513.66.4
Mar19° / 11°678.812.36.2
Apr16° / 759.910.95.0
May14° / 6210.59.74.0
Jun12° / 8312.29.12.8
Jul11° / 9113.19.42.4
Aug11° / 8113.410.42.7
Sep13° / 8112.911.73.3
Oct14° / 9512.813.14.0
Nov16° / 8512.114.34.7
Dec18° / 11°8411.414.95.6

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Masterton gets about 937 mm of precipitation a year. On a typical day the chance of rain is often wet, but that rises and falls sharply with the seasons.

The wetter season lasts 5.0 months, from around May 27 to Oct 25, peaking in August at about 45% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Mar 7.

October is the wettest month by volume, with 95 mm over about 13 wet days; May is the driest, with 62 mm.

0%10%20%30%40%50%60%JanFebMarAprMayJunJulAugSepOctNovDecdrierwetterdriermostly drysome rainoften wetvery wetAug 14 · 45%Mar 7 · 28%
Rain on a day (%)Rain days
Jan3410
Feb309
Mar299
Apr3210
May3411
Jun4012
Jul4213
Aug4313
Sep4213
Oct4113
Nov4012
Dec3711

Monthly rainfall

Over a full year, Masterton collects about 937 mm of rain across 136 wet days — roughly 78 mm in an average month.

It doesn’t fall evenly. October is the wettest month with 95 mm, while May is the driest at just 62 mm. The three wettest months alone bring about 29% of the year’s total.

0255075100125JanFebMarAprMayJunJulAugSepOctNovDec686767756283918181958584
Rainfall (mm)Rain days
Jan6810
Feb679
Mar679
Apr7510
May6211
Jun8312
Jul9113
Aug8113
Sep8113
Oct9513
Nov8512
Dec8411

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Masterton, the average share of the sky covered by clouds shows mild seasonal variation over the course of the year.

The clearer part of the year begins around April 29 and lasts for 1.4 months, ending around June 11. The clearest month is May, when the sky is clear, mostly clear, or partly cloudy 48% of the time on average.

The cloudier part of the year begins around June 12 and lasts for 3.0 months, ending around September 9. The cloudiest month is December, when it is overcast or mostly cloudy 60% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecMay 16 · 50%Jul 12 · 39%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan4555
Feb4852
Mar4753
Apr4555
May4852
Jun4555
Jul4159
Aug4258
Sep4456
Oct4357
Nov4258
Dec4060

Daylight, sunrise and sunset

DaylightNight

Hours of daylight through the year, with sunrise and sunset times.

The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around January 1, brings about 14 h 54 min of light; the shortest, around June 9, only 9 h 06 min — a swing of roughly 5 h 48 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan14.66:088:46
Feb13.66:438:21
Mar12.37:177:37
Apr10.97:506:45
May9.78:226:05
Jun9.18:455:50
Jul9.48:436:03
Aug10.48:116:32
Sep11.77:207:04
Oct13.16:297:36
Nov14.35:538:13
Dec14.95:468:41

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Masterton averages about 8 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 6 and 10 days.

The sunnier stretch runs 5.1 months, from around Dec 30 to Jun 1. The sunniest month is February, with roughly 9 sunny days (mixed).

The greyest month is December, down near 6 sunny days — about 31% fewer than the February peak.

051015JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyergloomymixedFeb 2010 daysDec 116 days
Sunny daysSky
Jan9Mixed
Feb9Mixed
Mar9Mixed
Apr8Mixed
May9Mixed
Jun7Gloomy
Jul7Gloomy
Aug7Gloomy
Sep8Gloomy
Oct7Gloomy
Nov7Gloomy
Dec7Gloomy

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.

Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.

In Masterton, the air stays dry or comfortable essentially all year. Even in February, the muggiest month, it feels humid or worse only about 10% of the time — humidity is not something you need to plan around here.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecMay 1 · 100%Feb 5 · 87%humidcomfortabledryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)
Jan60328
Feb553410
Mar71272
Apr87121
May9640
Jun10000
Jul10000
Aug10000
Sep10000
Oct9910
Nov9370
Dec74233

Wind

Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.

This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.

Across the year, average wind speed in Masterton is typically light breeze, near 16 km/h, and varies little with the seasons.

The windier part of the year lasts 4.7 months, from around Sep 3 to Jan 24. The windiest month is October, averaging about 18 km/h (light breeze).

The calmer part of the year runs from around Jan 25 to Sep 2, with April the calmest month at about 15 km/h.

0510152025JanFebMarAprMayJunJulAugSepOctNovDeccalmerwindiercalmlight breezebreezyOct 9 · 18 km/hApr 22 · 14 km/h
Wind speed (km/h)Feels
Jan17light breeze
Feb15light breeze
Mar15light breeze
Apr15light breeze
May15light breeze
Jun16light breeze
Jul15light breeze
Aug16light breeze
Sep17light breeze
Oct18light breeze
Nov18light breeze
Dec17light breeze

Best time to visit Masterton

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Masterton throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around mid December, Masterton is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.

Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.

The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Masterton for general outdoor tourist activities is from early December to early April, with a peak score in the second week of February.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timetravel scoretemperaturecloudsprecipitationFeb 14 · 6.5

The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Travel score (0–10)Rating
Jan6.2good
Feb6.4good
Mar6.2good
Apr5.1fair
May4.0fair
Jun2.8poor
Jul2.5poor
Aug2.7poor
Sep3.3poor
Oct4.0fair
Nov4.7fair
Dec5.6good

The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Masterton for hot-weather activities is from mid January to early March, with a peak score in the second week of February.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationFeb 9 · 3.5

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).

What to pack for Masterton, by month

EssentialRecommendedOptional

Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.

For a warm-season trip around February (highs near 20°C), the essentials are rain gear and sun protection. In the cold season around July (highs near 11°C), pack a warm layer and rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In February, Masterton sees daytime highs around 20°C and nights near 13°C. Worth packing: rain gear and sun protection. About 9 days see rain.

Sea temperature near Masterton

Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.

The sea at the nearest coast (about 43 km away) is warmest in February at about 18°C and coldest in August near 12°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

10°12°14°16°18°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan17Cool
Feb18Cool
Mar17Cool
Apr16Cool
May15Bracing
Jun14Bracing
Jul13Bracing
Aug12Bracing
Sep13Bracing
Oct13Bracing
Nov14Bracing
Dec16Cool

UV index (midday) in Masterton by month

LowModerateHighVery highExtreme

Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.

Under clear skies, the midday UV index in Masterton peaks around January 12 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 17 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeModerateLowModerateHighVery highExtremeJan 12UV 11Jun 17UV 2
UV index (midday)Level
Jan11Extreme
Feb11Extreme
Mar6High
Apr4Moderate
May2Moderate
Jun2Low
Jul2Low
Aug3Moderate
Sep4Moderate
Oct6High
Nov10Very high
Dec11Extreme

Average hourly UV index in Masterton

LowModerateHighVery highExtreme

Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.

The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

UV falls off far faster than brightness as the sun drops, so even in January the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 6.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan96.5
Feb8.56
Mar6.52
Apr40
May00
Jun00
Jul00
Aug00
Sep4.50
Oct6.52.5
Nov8.56
Dec96.5
Almanac & agriculture

Growing season

Chance of a frost-free day

Masterton is mild enough that a frost-free day stays more likely than not even in midwinter.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDec
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr1000
May990
Jun950
Jul940
Aug960
Sep980
Oct1000
Nov1000
Dec1000

Growing degree days

Degree days (base 10°C)

Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Masterton banks about 854 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around February.

02004006008001,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan186
Feb177
Mar149
Apr77
May20
Jun0
Jul0
Aug0
Sep1
Oct29
Nov74
Dec142

Solar energy

Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.

Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.

Masterton receives about 4.2 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 1.6 and 7.2 kWh/m².

The brighter stretch of the year lasts 5.9 months, from around Sep 24 to Mar 22. The brightest month is January, averaging about 6.8 kWh/m² (intense).

The dimmest month is June, down near 1.6 kWh/m² — roughly 76% less than the January peak.

012345678JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseJan 27.2 kWhJun 211.6 kWh
Solar energy (kWh/m²)Level
Jan7.0Intense
Feb5.8Bright
Mar4.5Bright
Apr3.0Moderate
May2.1Moderate
Jun1.6Dim
Jul1.8Dim
Aug2.6Moderate
Sep3.8Moderate
Oct5.1Bright
Nov6.3Intense
Dec6.6Intense

Where is Masterton?

Masterton sits at 41.0°S, 175.7°E, 103 m above sea level, in New Zealand. The nearest listed city is Levin, 49 km away.

Topography around Masterton

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Masterton.

Within 3 km, the terrain around Masterton has only modest variations in elevation — a maximum elevation change of 70 m around an average of 108 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 673 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,511 m.

The land around Masterton is covered by grassland (51%) and artificial surfaces (24%) within 3 km, grassland (78%) within 16 km, and grassland (38%), water (35%) and trees (26%) within 80 km.

3 km
70 m
16 km
673 m
80 km
1,511 m
treesgrasslandcroplandartificial surfaceswater
Nearby: Levin 49 km · Paraparaumu 54 km · Upper Hutt 55 km · Palmerston North 67 km · Lower Hutt 68 km · Wainuiomata 68 km · Porirua 70 km · Wellington 82 km

New Zealand travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type I
230 V · 50 Hz
Prices
≈ 86% of US
price level, 2025
GDP per capita
$49,591
2025
Happiness
7.0 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.5
per 100k, 2022
Road deaths
9.6
per 100k/yr, 2019
Income group
High
World Bank
Religion
no religion 49%Christian 37%objected to answering 7%Hindu 3%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Masterton (-40.9597°, 175.6575°, elevation 103 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).