Climate and average weather in Frankston South

In Frankston South, the summers are warm, fairly dry, and partly cloudy and the winters are cool and partly cloudy.

Best: early November to late April

Over the course of the year, the temperature in Frankston South typically varies from 7°C to 25°C, and is rarely below 4°C or above 34°C. January is the hottest month of the year, while July is the coldest.

Based on the travel score, the best time of year to visit Frankston South for warm-weather activities is from early November to late April.

Hottest
Jan
25°
Coldest
Jul
Wettest
Sep
75 mm
Driest
Mar
38 mm
Rain / yr
693 mm
119 wet days
Daylight
9.3–14.7 h
shortest–longest
Elevation
88 m
38.2°S
Clearest
Feb
52% cloud

Frankston South is suburb of Melbourne, Australia.

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

Frankston South 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 November to late April.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Frankston South, 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 7 to March 22, with daily high temperatures above 23°C. The hottest month of the year in Frankston South is January, with an average high of 25°C and low of 15°C.

The cool season lasts 3.5 months, from May 24 to September 5, with daily high temperatures below 16°C. The coldest month of the year in Frankston South is July, with an average low of 7°C and high of 13°C.

Days typically run about 9°C warmer than nights, with the widest day–night swing (around 11°C) in January.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2515
Feb2515
Mar2313
Apr2011
May169
Jun148
Jul137
Aug148
Sep168
Oct1910
Nov2111
Dec2313

Average hourly temperature in Frankston South

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 January afternoons, near 25°C, and coldest before dawn in July, near C.

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

Frankston South 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
Jan25° / 15°506.114.47.5
Feb25° / 15°435.513.57.5
Mar23° / 13°386.912.37.4
Apr20° / 11°508116.4
May16° / 5710.7105.0
Jun14° / 6111.59.43.8
Jul13° / 5912.39.63.5
Aug14° / 7013.610.53.9
Sep16° / 7513.711.74.7
Oct19° / 10°6911.8135.7
Nov21° / 11°629.914.16.4
Dec23° / 13°598.614.67.1

Chance of rain

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

Frankston South gets about 693 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 6.2 months, from around May 8 to Nov 13, peaking in September at about 47% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Mar 4.

September is the wettest month by volume, with 75 mm over about 14 wet days; March is the driest, with 38 mm.

0%10%20%30%40%50%60%JanFebMarAprMayJunJulAugSepOctNovDecdrierwetterdriermostly drysome rainoften wetvery wetSep 17 · 47%Mar 4 · 18%
Rain on a day (%)Rain days
Jan196
Feb206
Mar227
Apr288
May3411
Jun3912
Jul4112
Aug4414
Sep4514
Oct3912
Nov3310
Dec289

Monthly rainfall

Over a full year, Frankston South collects about 693 mm of rain across 119 wet days — roughly 58 mm in an average month.

It doesn’t fall evenly. September is the wettest month with 75 mm, while March is the driest at just 38 mm. The three wettest months alone bring about 31% of the year’s total.

0255075100JanFebMarAprMayJunJulAugSepOctNovDec504338505761597075696259
Rainfall (mm)Rain days
Jan506
Feb436
Mar387
Apr508
May5711
Jun6112
Jul5912
Aug7014
Sep7514
Oct6912
Nov6210
Dec599

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Frankston South, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.

The clearer part of the year begins around December 23 and lasts for 3.4 months, ending around April 3. The clearest month is January, when the sky is clear, mostly clear, or partly cloudy 55% of the time on average.

The cloudier part of the year begins around April 4 and lasts for 8.6 months, ending around December 22. The cloudiest month is May, when it is overcast or mostly cloudy 66% 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%JanFebMarAprMayJunJulAugSepOctNovDecJan 21 · 56%May 7 · 34%clearmostly clearpartly cloudymostly cloudyovercastclearercloudier
Clearer (%)Cloudier (%)
Jan5545
Feb5446
Mar5050
Apr4159
May3466
Jun3961
Jul4159
Aug4159
Sep3961
Oct3961
Nov4060
Dec4357

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 December 19, brings about 14 h 42 min of light; the shortest, around June 19, only 9 h 18 min — a swing of roughly 5 h 24 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan14.46:178:40
Feb13.56:508:18
Mar12.37:207:38
Apr11.07:496:50
May10.08:176:14
Jun9.48:396:01
Jul9.68:376:13
Aug10.58:086:39
Sep11.77:217:06
Oct13.06:347:35
Nov14.16:028:08
Dec14.65:568:35

Sunny days

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

Frankston South averages about 7 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 5 and 12 days.

The sunnier stretch runs 4.6 months, from around Nov 19 to Apr 6. The sunniest month is February, with roughly 12 sunny days (mixed).

The greyest month is May, down near 5 sunny days — about 56% fewer than the February peak.

051015JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedFeb 312 daysMay 125 days
Sunny daysSky
Jan12Mixed
Feb11Mixed
Mar10Mixed
Apr7Gloomy
May5Gloomy
Jun6Gloomy
Jul6Gloomy
Aug6Gloomy
Sep5Gloomy
Oct7Gloomy
Nov7Gloomy
Dec9Mixed

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 Frankston South, how humid it feels changes noticeably over the year.

The more humid part of the year lasts 4.3 months, from around November 14 to March 24. The muggiest month is February, when the air feels humid, muggy or worse about 15% of the time.

The most comfortable stretch runs from around March 25 to November 13, and May is the most comfortable month — the air is dry or comfortable 100% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecMay 5 · 100%Feb 6 · 83%humidcomfortabledryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)
Jan632692
Feb5827132
Mar751960
Apr91910
May97300
Jun99100
Jul100000
Aug100000
Sep99100
Oct96400
Nov88930
Dec801650

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 Frankston South is typically light breeze, near 14 km/h, and varies little with the seasons.

The windier part of the year lasts 4.5 months, from around Jun 11 to Oct 25. The windiest month is August, averaging about 16 km/h (light breeze).

The calmer part of the year runs from around Oct 26 to Jun 10, with April the calmest month at about 12 km/h.

05101520JanFebMarAprMayJunJulAugSepOctNovDeccalmerwindiercalmercalmlight breezeAug 10 · 16 km/hApr 14 · 12 km/h
Wind speed (km/h)Feels
Jan13light breeze
Feb13light breeze
Mar13light breeze
Apr12light breeze
May13light breeze
Jun14light breeze
Jul15light breeze
Aug16light breeze
Sep15light breeze
Oct14light breeze
Nov13light breeze
Dec13light breeze

Best time to visit Frankston South

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around mid November, Frankston South 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 Frankston South for general outdoor tourist activities is from early November to late April, with a peak score in the first week of March.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timetravel scoretemperaturecloudsprecipitationMar 5 · 7.7

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
Jan7.5good
Feb7.5ideal
Mar7.4good
Apr6.4good
May5.0fair
Jun3.8fair
Jul3.5fair
Aug3.9fair
Sep4.7fair
Oct5.7good
Nov6.4good
Dec7.0good

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 Frankston South for hot-weather activities is from mid December to late March, with a peak score in the third week of January.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationJan 21 · 7.0

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 Frankston South, 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 January (highs near 25°C), the essentials are light clothes and sun protection. In the cold season around July (highs near 13°C), pack a warm layer and rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In January, Frankston South sees daytime highs around 25°C and nights near 15°C. Pack sun protection. Worth having: light clothes. About 6 days see rain.

Sea temperature near Frankston South

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

The sea offshore is warmest in February at about 21°C and coldest in August near 11°C.

It's comfortable for a long swim from Jan 18 to Mar 11 — about 1.7 months when the water holds above 20°C.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan20Refreshing
Feb21Refreshing
Mar20Cool
Apr18Cool
May15Cool
Jun13Bracing
Jul12Bracing
Aug11Bracing
Sep12Bracing
Oct14Bracing
Nov17Cool
Dec18Cool

UV index (midday) in Frankston South 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 Frankston South peaks around December 19 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateLowModerateVery highExtremeDec 19UV 12Jun 18UV 2
UV index (midday)Level
Jan11Extreme
Feb10Extreme
Mar8Very high
Apr5Moderate
May3Moderate
Jun2Low
Jul2Moderate
Aug3Moderate
Sep4Moderate
Oct7Very high
Nov10Very high
Dec12Extreme

Average hourly UV index in Frankston South

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 December the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 7 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
Feb85.5
Mar74
Apr4.50
May00
Jun00
Jul00
Aug1.50
Sep4.50
Oct73.5
Nov8.55.5
Dec97
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Frankston South is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecfrost-free year round
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr1000
May1000
Jun1000
Jul1000
Aug1000
Sep1000
Oct1000
Nov1000
Dec1000

Growing degree days

Degree days (base 10°C)Frost-free shaded

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. Frankston South banks about 1,790 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around February.

05001,0001,5002,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan308
Feb282
Mar259
Apr163
May90
Jun26
Jul8
Aug27
Sep70
Oct126
Nov183
Dec248

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.

Frankston South receives about 4.5 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 1.8 and 7.5 kWh/m².

The brighter stretch of the year lasts 5.8 months, from around Sep 26 to Mar 22. The brightest month is January, averaging about 7.2 kWh/m² (intense).

The dimmest month is June, down near 1.8 kWh/m² — roughly 74% less than the January peak.

0123456789JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseJan 27.5 kWhJun 191.8 kWh
Solar energy (kWh/m²)Level
Jan7.3Intense
Feb6.3Intense
Mar4.9Bright
Apr3.4Moderate
May2.3Moderate
Jun1.8Dim
Jul2.0Moderate
Aug2.8Moderate
Sep4.0Bright
Oct5.4Bright
Nov6.5Intense
Dec7.1Intense

Where is Frankston South?

Frankston South sits at 38.2°S, 145.1°E, 88 m above sea level, in Australia. The nearest listed city is Langwarrin, 3.0 km away.

Topography around Frankston South

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

Within 3 km, the terrain around Frankston South has only modest variations in elevation — a maximum elevation change of 159 m around an average of 72 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 162 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,292 m.

The land around Frankston South is covered by trees (55%) and artificial surfaces (32%) within 3 km, water (34%), grassland (26%) and trees (21%) within 16 km, and water (35%), grassland (30%) and trees (22%) within 80 km.

3 km
159 m
16 km
162 m
80 km
1,292 m
treesgrasslandcroplandartificial surfaceswaterwetland
Nearby: Langwarrin 3.0 km · Frankston 3.0 km · Frankston East 4.0 km · Mount Eliza 5.0 km · Seaford 7.0 km · Carrum Downs 8.0 km · Mornington 10 km · Cranbourne West 14 km

Australia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type I
230 V · 50 Hz
Prices
≈ 90% of US
price level, 2025
GDP per capita
$65,130
2025
Happiness
6.9 / 10
World Happiness, 2025
Homicide rate
0.9
per 100k, 2023
Road deaths
4.9
per 100k/yr, 2019
Income group
High
World Bank
Religion
none 38%Roman Catholic 20%Protestant 18%other Christian 4%

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 Frankston South (-38.166°, 145.1364°, elevation 88 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).