Melbourne weather in September

In September, Melbourne sees average daytime highs of 84°F and overnight lows near 77°F, with 5.9 in of rain across 20 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 84°F through the month. The sky is clear or mostly clear about 26% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 36 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Melbourne's 11th-clearest and 9th-windiest month. For the whole year in context, see Melbourne's year-round climate.

Daytime high
84°
4th warmest
Overnight low
77°
10th coldest
Rainfall
5.9 in
20 wet days
Daylight
12 h 12 min
6:12 AM – 6:22 PM
Cloud cover
65%
11th clearest
Wind
8 mph
9th windiest
Solar energy
4.94 kWh/m²
Travel score
4.3
out of 10

Melbourne is city in Brevard County, Florida, United States of America.

Density
756/km²
people per km²
Founded
1867

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 84°F through the month.

A typical September day in Melbourne reaches about 84°F in the afternoon and slips back to 77°F overnight — a 6°F spread between the day's warmth and the night's chill. On most days the high lands between 81°F and 86°F. Set against its neighbours, September runs about 2°F cooler than August and about 3°F warmer than October.

70°80°90°151015202530
Avg high (°F)Avg low (°F)
18578
28578
38578
48578
58478
68478
78478
88478
98478
108478
118478
128478
138478
148478
158478
168477
178477
188377
198377
208377
218377
228377
238377
248377
258377
268377
278377
288377
298376
308376

How September really feels in Melbourne

Once humidity and wind are folded in, September averages 22 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
22
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Melbourne weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan70° / 60°2.2710.47.0
Feb71° / 61°1.96.9117.1
Mar74° / 64°2.36.911.87.5
Apr77° / 68°1.96.912.77.5
May81° / 73°2.79.313.46.8
Jun84° / 76°5.218.413.74.5
Jul85° / 78°4.619.813.63.9
Aug85° / 78°5.622.5133.7
Sep84° / 77°5.92012.24.3
Oct80° / 74°3.812.511.36.3
Nov75° / 68°1.97.610.67.4
Dec72° / 63°1.86.810.37.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 58%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13664
23664
33664
43664
53664
63664
73763
83763
93862
103961
113961
124159
134159
144159
154258
164357
174456
184456
194456
204555
214555
224654
234555
244654
254654
264753
274753
284753
294753
304753

Chance of precipitation in September

Any precipitation

Melbourne gets around 5.9 in of rain over 20 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 66% and peaks near 73% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
173
273
373
473
573
673
772
872
971
1070
1169
1268
1367
1466
1565
1665
1764
1863
1962
2062
2162
2261
2361
2461
2560
2660
2760
2859
2959
3058

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 61% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10014950
20025048
30025246
40025444
50025642
60025741
70035839
80036037
90036136
100046234
110046333
120046432
130056431
140056530
150066529
160076528
170176428
180186427
190186427
200196426
210196426
2201106425
2302106424
2402116423
2502126422
2603136222
2713136221
2813146220
2914146219
3014156119

Wind in September

Winds average 8 mph in September.

Across September, daily wind ranges from about 8 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 36 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over September. Sunrise moves from 6:05 AM to 6:19 AM, and sunset from 6:40 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:056:40
212.66:056:39
312.56:056:37
412.56:066:36
512.56:066:35
612.46:076:34
712.46:076:33
812.46:086:31
912.46:086:30
1012.36:096:29
1112.36:096:28
1212.36:106:27
1312.36:106:25
1412.26:116:24
1512.26:116:23
1612.26:126:22
1712.16:126:20
1812.16:136:19
1912.16:136:18
2012.16:146:17
2112.06:146:16
2212.06:156:14
2312.06:156:13
2411.96:166:12
2511.96:166:11
2611.96:176:09
2711.86:176:08
2811.86:186:07
2911.86:186:06
3011.86:196:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.94 kWh/m².

For context, solar energy here swings from a low near 3.03 kWh/m² to a high of 6.46 kWh/m² in May across the year — September's 4.94 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.2Bright
65.2Bright
75.2Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.7Bright
254.7Bright
264.7Bright
274.6Bright
284.6Bright
294.6Bright
304.5Bright
Planning a trip in September

Hazard calendar for Melbourne

In seasonPeak

In September, Melbourne sits inside its atlantic hurricane and rainy season season. The full year is below, with each hazard's peak months called out.

Melbourne sits in the Atlantic hurricane belt; the season peaks August–October.

Melbourne's rainy season runs May–October, when most of the year's rain falls.

Atlantic hurricane
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Melbourne?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.3
Sightseeing
10th-best month of the year
5.3
Beach & pool
7th-best month of the year

September is a reasonable time to visit Melbourne for sightseeing.

What to pack for Melbourne in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Melbourne sees daytime highs around 84°F and nights near 77°F. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

Sea temperature near Melbourne in September

The nearest coast averages about 83°F in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 14 mi away) is warmest in September at about 83°F and coldest in February near 69°F.

The water stays above 68°F all year — warm enough for a swim any month.

70°75°80°85°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan70Refreshing
Feb69Refreshing
Mar71Refreshing
Apr74Refreshing
May77Warm
Jun80Warm
Jul82Warm
Aug82Tropical
Sep83Tropical
Oct81Warm
Nov76Warm
Dec73Refreshing

UV index in Melbourne in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Melbourne peaks around July 15 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighModerateJul 15UV 11Dec 19UV 4
UV index (midday)Level
Jan5Moderate
Feb7High
Mar9Very high
Apr8Very high
May10Very high
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep9Very high
Oct7Very high
Nov5High
Dec4Moderate

Air quality in Melbourne in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Melbourne is worst in July — around 17 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1817 µg/m³Dec 156 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar9Good
Apr10Good
May10Good
Jun14Moderate
Jul17Moderate
Aug15Moderate
Sep10Good
Oct8Good
Nov6Good
Dec6Good
Location & terrain

Where is Melbourne?

Melbourne sits at 28.1°N, 80.6°W, 20 ft above sea level, in United States. The nearest listed city is West Melbourne, 3.1 mi away.

Topography around Melbourne

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Melbourne.

Within 2 miles, the terrain around Melbourne has only modest variations in elevation — a maximum elevation change of 49 ft around an average of 13 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 98 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 246 ft.

The land around Melbourne is covered by water (42%) and artificial surfaces (32%) within 2 miles, water (45%) and trees (25%) within 10 miles, and water (37%), trees (29%) and grassland (27%) within 50 miles.

2 miles
49 ft
10 miles
98 ft
50 miles
246 ft
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: West Melbourne 3.1 mi · Palm Bay 3.7 mi · Merritt Island 20 mi · Rockledge 20 mi · Sebastian 21 mi · Cocoa 22 mi · Vero Beach 34 mi · Vero Beach South 34 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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 Melbourne (28.0836°, -80.6081°, elevation 20 ft), 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).