Mandurah weather in December

In December, Mandurah sees average daytime highs of 26°C and overnight lows near 17°C, with 12 mm of rain across 1.9 wet days and about 14.1 hours of daylight. It is the 4th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 24°C in the first days to 27°C by the end. The sky is clear or mostly clear about 69% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 hours at the start of December to 14 h 06 min by month's end. Set against the rest of the year, December is Mandurah's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Mandurah's year-round climate.

Daytime high
26°
4th warmest
Overnight low
17°
9th coldest
Rainfall
12 mm
1.9 wet days
Daylight
14 h 06 min
5:09 AM – 7:17 PM
Cloud cover
27%
3rd clearest
Wind
20 km/h
2nd windiest
Solar energy
8.35 kWh/m²
Travel score
8.6
out of 10

Mandurah is city in Western Australia.

Density
1,010/km²
people per km²

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 24°C in the first days to 27°C by the end.

A typical December day in Mandurah reaches about 26°C in the afternoon and slips back to 17°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 31°C. Set against its neighbours, December runs about 3°C warmer than November and about 2°C cooler than January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12415
22415
32416
42416
52416
62516
72516
82516
92516
102516
112516
122516
132617
142617
152617
162617
172617
182617
192617
202617
212617
222717
232717
242717
252718
262718
272718
282718
292718
302718
312718

Mandurah weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 18°121.413.98.4
Feb28° / 19°161.413.27.9
Mar27° / 18°182.512.28.2
Apr23° / 16°254.311.28.0
May20° / 13°748.110.46.8
Jun18° / 12°11211.29.95.8
Jul17° / 11°11113.110.15.2
Aug17° / 11°9611.510.85.5
Sep18° / 11°649.111.86.2
Oct20° / 13°29512.87.4
Nov23° / 15°234.113.78.2
Dec26° / 17°121.914.18.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 69% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 18%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17723
27723
37822
47822
57921
67921
78020
88020
98119
108119
118119
128218
138218
148218
158218
168317
178317
188317
198416
208416
218515
228515
238515
248515
258515
268614
278614
288614
298614
308614
318614

Chance of precipitation in December

Any precipitation

Mandurah gets around 12 mm of rain over 1.9 wet days in December, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 7% and peaks near 11% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
111
211
311
410
510
610
79
89
98
108
118
128
137
147
157
166
176
186
195
205
215
225
234
244
254
264
274
284
293
303
313

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 53% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1662770
2662770
3662770
4662770
5652780
6652780
7642880
8622990
9612991
105930101
115831101
125632111
135533111
145334121
155235121
165136121
175036131
184937131
194838131
204738131
214639132
224539132
234540132
244440132
254440132
264440133
274340133
284340133
294241133
304241134
314141144

Wind in December

Winds average 20 km/h in December.

Across December, daily wind ranges from about 19 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
820light breeze
920light breeze
1020light breeze
1120light breeze
1220light breeze
1320light breeze
1420light breeze
1520light breeze
1620light breeze
1720light breeze
1820light breeze
1920light breeze
2020light breeze
2120light breeze
2220light breeze
2320light breeze
2420light breeze
2520light breeze
2620light breeze
2720light breeze
2820light breeze
2920light breeze
3020light breeze
3120light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 hours at the start of December to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 5:07 AM to 5:17 AM, and sunset from 7:06 PM to 7:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:077:06
214.05:077:07
314.05:077:08
414.05:077:09
514.05:077:10
614.05:077:10
714.15:077:11
814.15:087:12
914.15:087:12
1014.15:087:13
1114.15:087:14
1214.15:087:15
1314.15:097:15
1414.15:097:16
1514.15:097:16
1614.15:097:17
1714.15:107:18
1814.15:107:18
1914.15:117:19
2014.15:117:19
2114.15:117:20
2214.15:127:20
2314.15:127:21
2414.15:137:21
2514.15:137:22
2614.15:147:22
2714.15:147:22
2814.15:157:23
2914.15:167:23
3014.15:167:23
3114.15:177:24

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 8.35 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.48 kWh/m² to a high of 8.35 kWh/m² in December across the year — December's 8.35 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
18.0Intense
28.1Intense
38.1Intense
48.1Intense
58.1Intense
68.1Intense
78.2Intense
88.2Intense
98.2Intense
108.2Intense
118.2Intense
128.3Intense
138.3Intense
148.3Intense
158.3Intense
168.3Intense
178.4Intense
188.4Intense
198.4Intense
208.5Intense
218.5Intense
228.5Intense
238.6Intense
248.6Intense
258.6Intense
268.6Intense
278.6Intense
288.7Intense
298.7Intense
308.7Intense
318.7Intense
Planning a trip in December

Hazard calendar for Mandurah

In seasonPeak

In December, Mandurah sits inside its cyclone season. The full year is below, with each hazard's peak months called out.

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

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

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

Is December a good time to visit Mandurah?

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

8.6
Sightseeing
1st-best month of the year
8.0
Beach & pool
4th-best month of the year

December is one of the better times to visit Mandurah for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Mandurah in December

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

In December, Mandurah sees daytime highs around 26°C and nights near 17°C. Pack sun protection. Worth having: light clothes.

sun protectionlight clothes

Sea temperature near Mandurah in December

The nearest coast averages about 21°C in December — 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 km away) is warmest in February at about 22°C and coldest in September near 18°C.

It's comfortable for a long swim from Dec 4 to Jun 19 — about 6.5 months when the water holds above 20°C.

16°18°20°22°24°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan22Refreshing
Feb22Refreshing
Mar22Refreshing
Apr22Refreshing
May21Refreshing
Jun20Refreshing
Jul19Cool
Aug18Cool
Sep18Cool
Oct18Cool
Nov19Cool
Dec21Refreshing

UV index in Mandurah in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mandurah peaks around January 1 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeModerateVery highExtremeJan 1UV 13Jun 20UV 3
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar10Extreme
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug5Moderate
Sep8Very high
Oct9Very high
Nov10Very high
Dec13Extreme
Location & terrain

Where is Mandurah?

Mandurah sits at 32.5°S, 115.7°E, 4 m above sea level, in Australia. The nearest listed city is Baldivis, 24 km away.

Topography around Mandurah

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

Within 3 km, the terrain around Mandurah has only modest variations in elevation — a maximum elevation change of 29 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 44 m; within 80 km, significant variations in elevation — a maximum elevation change of 568 m.

The land around Mandurah is covered by artificial surfaces (48%) and water (37%) within 3 km, water (54%) and grassland (21%) within 16 km, and trees (42%) and water (38%) within 80 km.

3 km
29 m
16 km
44 m
80 km
568 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Baldivis 24 km · Rockingham 28 km · Kwinana 33 km · Byford 43 km · Willetton 55 km · Canning Vale 55 km · Gosnells 56 km · Thornlie 56 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 Mandurah (-32.5269°, 115.7217°, elevation 4 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).