Geraldton weather in September

In September, Geraldton sees average daytime highs of 20°C and overnight lows near 15°C, with 22 mm of rain across 4.6 wet days and about 11.8 hours of daylight. It is the 10th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 20°C through the month. The sky is clear or mostly clear about 62% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 24 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Geraldton's 7th-clearest and 7th-windiest month. For the whole year in context, see Geraldton's year-round climate.

Daytime high
20°
10th warmest
Overnight low
15°
3rd coldest
Rainfall
22 mm
4.6 wet days
Daylight
11 h 48 min
6:21 AM – 6:11 PM
Cloud cover
31%
7th clearest
Wind
21 km/h
7th windiest
Solar energy
5.45 kWh/m²
Travel score
7.5
out of 10

Geraldton is city in Western Australia.

Air quality
Good
PM10 18.8 µg/m³ · 2016
Density
152/km²
people per km²
Founded
1850

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 20°C through the month.

A typical September day in Geraldton reaches about 20°C in the afternoon and slips back to 15°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 23°C. Set against its neighbours, September runs on par with August and about 2°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11914
21914
31914
41914
51914
61914
71914
81914
91915
101915
112015
122015
132015
142015
152015
162015
172015
182015
192015
202015
212015
222015
232015
242015
252015
262015
272015
282015
292015
302015

Geraldton weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 21°71.113.68.9
Feb27° / 22°101.4138.4
Mar27° / 22°131.412.28.5
Apr25° / 20°152.611.38.5
May22° / 17°384.810.68.0
Jun20° / 15°567.610.27.1
Jul19° / 14°587.810.46.8
Aug19° / 14°376.6117.1
Sep20° / 15°224.611.87.5
Oct21° / 16°102.312.78.3
Nov23° / 18°81.613.48.8
Dec25° / 20°40.913.89.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 62% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 18%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17921
27921
37921
47921
57921
67921
77921
88020
98119
108119
118119
128218
138218
148218
158218
168218
178416
188416
198416
208416
218416
228416
238416
248416
258515
268515
278416
288515
298515
308515

Chance of precipitation in September

Any precipitation

Geraldton gets around 22 mm of rain over 4.6 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 15% and peaks near 20% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
120
220
320
419
519
618
717
816
916
1015
1115
1214
1314
1413
1513
1613
1713
1813
1913
2013
2113
2213
2314
2414
2514
2614
2713
2813
2913
3012

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 75% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
181163
281163
381163
482153
582153
682153
782153
881163
981163
1079174
1178184
1278184
1377194
1476204
1575214
1675214
1774224
1873234
1973234
2073243
2172253
2271263
2371263
2470273
2570273
2669283
2769283
2868293
2967303
3066304

Wind in September

Winds average 21 km/h in September.

Across September, daily wind ranges from about 20 km/h on the calmest days to 22 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
120light breeze
220light breeze
320light breeze
420breezy
520breezy
620breezy
720breezy
820breezy
920breezy
1020breezy
1121breezy
1221breezy
1321breezy
1421breezy
1521breezy
1621breezy
1721breezy
1821breezy
1921breezy
2021breezy
2121breezy
2221breezy
2321breezy
2421breezy
2522breezy
2622breezy
2722breezy
2822breezy
2922breezy
3022breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 24 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over September. Sunrise moves from 6:39 AM to 6:04 AM, and sunset from 6:03 PM to 6:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.46:396:03
211.46:386:04
311.56:376:04
411.56:366:05
511.56:356:05
611.56:336:06
711.66:326:06
811.66:316:07
911.66:306:07
1011.76:286:08
1111.76:276:08
1211.76:266:09
1311.76:256:09
1411.86:236:10
1511.86:226:10
1611.86:216:11
1711.96:206:11
1811.96:186:12
1911.96:176:12
2011.96:166:13
2112.06:156:13
2212.06:136:14
2312.06:126:14
2412.16:116:15
2512.16:106:15
2612.16:086:16
2712.26:076:17
2812.26:066:17
2912.26:056:18
3012.26:046:18

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.45 kWh/m².

For context, solar energy here swings from a low near 3.1 kWh/m² to a high of 8.3 kWh/m² in December across the year — September's 5.45 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.9Bright
54.9Bright
65.0Bright
75.0Bright
85.1Bright
95.1Bright
105.2Bright
115.3Bright
125.3Bright
135.4Bright
145.4Bright
155.5Bright
165.5Bright
175.6Bright
185.6Bright
195.7Bright
205.7Bright
215.8Bright
225.8Bright
235.8Bright
245.9Bright
255.9Bright
266.0Bright
276.0Intense
286.1Intense
296.2Intense
306.2Intense
Planning a trip in September

Hazard calendar for Geraldton

In seasonPeak

None of Geraldton's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Geraldton sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Cyclone
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Geraldton?

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

7.5
Sightseeing
9th-best month of the year
3.6
Beach & pool
10th-best month of the year

September is one of the better times to visit Geraldton for general sightseeing.

What to pack for Geraldton in September

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

In September, Geraldton sees daytime highs around 20°C and nights near 15°C. Worth packing: sun protection and a windbreaker. About 5 days see rain.

sun protectiona windbreaker

Sea temperature near Geraldton in September

The nearest coast averages about 19°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in March at about 24°C and coldest in September near 19°C.

It's comfortable for a long swim from Oct 25 to Aug 4 — about 9.3 months when the water holds above 20°C.

18°20°22°24°26°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb23Refreshing
Mar24Refreshing
Apr23Refreshing
May22Refreshing
Jun21Refreshing
Jul21Refreshing
Aug20Cool
Sep19Cool
Oct20Cool
Nov21Refreshing
Dec22Refreshing

UV index in Geraldton in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Geraldton peaks around January 1 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeHighModerateHighVery highExtremeJan 1UV 14Jun 23UV 4
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar12Extreme
Apr7High
May5High
Jun4Moderate
Jul4Moderate
Aug6High
Sep8Very high
Oct11Extreme
Nov10Extreme
Dec14Extreme
Location & terrain

Where is Geraldton?

Geraldton sits at 28.8°S, 114.6°E, 15 m above sea level, in Australia. The nearest listed city is Ellenbrook, 357 km away.

EllenbrookDuncraigLandsdaleBallajuraScarboroughDianellaMorleyPerth

Topography around Geraldton

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

Within 3 km, the terrain around Geraldton has only modest variations in elevation — a maximum elevation change of 52 m around an average of 12 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 221 m; within 80 km, significant variations in elevation — a maximum elevation change of 318 m.

The land around Geraldton is covered by artificial surfaces (36%) and water (34%) within 3 km, water (53%) within 16 km, and water (48%) and cropland (35%) within 80 km.

3 km
52 m
16 km
221 m
80 km
318 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Ellenbrook 357 km · Duncraig 357 km · Landsdale 358 km · Ballajura 362 km · Scarborough 364 km · Dianella 366 km · Morley 367 km · Perth 373 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 Geraldton (-28.779°, 114.6146°, elevation 15 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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).