Prestons weather in December

In December, Prestons sees average daytime highs of 27°C and overnight lows near 16°C, with 64 mm of rain across 9.4 wet days and about 14.2 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 31% of the time in December, and the air most often feels humid.

Daylight stretches from about 14 h 06 min at the start of December to 14 h 12 min by month's end. Set against the rest of the year, December is Prestons's 10th-clearest and 4th-windiest month. For the whole year in context, see Prestons's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
16°
10th coldest
Rainfall
64 mm
9.4 wet days
Daylight
14 h 12 min
5:45 AM – 8:00 PM
Cloud cover
59%
10th clearest
Wind
9 km/h
4th windiest
Solar energy
6.54 kWh/m²
Travel score
6.6
out of 10

Prestons is locality in New South Wales, Australia.

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical December day in Prestons reaches about 27°C in the afternoon and slips back to 16°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 33°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12615
22615
32615
42615
52616
62616
72616
82616
92616
102616
112616
122716
132716
142716
152716
162716
172716
182716
192716
202717
212717
222717
232717
242717
252717
262717
272717
282717
292817
302817
312817

Prestons weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 18°709.8146.0
Feb27° / 18°8810.413.36.2
Mar25° / 16°6610.412.36.8
Apr23° / 12°426.511.27.5
May20° / 405.310.37.2
Jun17° / 536.49.86.2
Jul17° / 305106.3
Aug18° / 324.810.77.1
Sep21° / 375.711.87.5
Oct23° / 11°517.512.97.4
Nov25° / 14°709.413.86.9
Dec27° / 16°649.414.26.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24753
34654
44555
54654
64555
74555
84555
94456
104456
114456
124456
134555
144456
154456
164456
174456
184555
194555
204555
214555
224555
234753
244753
254852
264753
274852
284852
294852
304951
314951

Chance of precipitation in December

Any precipitation

Prestons gets around 64 mm of rain over 9.4 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 31% and peaks near 32% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
131
232
332
432
532
632
732
832
932
1032
1131
1231
1331
1431
1531
1631
1731
1831
1931
2031
2130
2230
2330
2430
2529
2629
2729
2829
2929
3029
3129

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the humid band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 10% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14030255
23929266
33929266
43829266
53830267
63730267
73631267
83531267
93431278
103332278
113232278
123132289
133032289
142932299
1528322910
1628323010
1727323110
1826323210
1925313311
2025313411
2124313411
2224303511
2323303611
2422303611
2522303712
2621303712
2720303812
2820303813
2919293813
3019293913
3119293914

Wind in December

Winds average 9 km/h in December.

Across December, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 06 min at the start of December to 14 h 12 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 5:43 AM to 5:53 AM, and sunset from 7:49 PM to 8:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:437:49
214.15:437:50
314.15:437:51
414.15:437:52
514.25:437:52
614.25:437:53
714.25:437:54
814.25:437:55
914.25:447:55
1014.25:447:56
1114.25:447:57
1214.25:447:58
1314.25:447:58
1414.25:457:59
1514.25:458:00
1614.25:458:00
1714.35:468:01
1814.35:468:01
1914.35:468:02
2014.35:478:02
2114.35:478:03
2214.35:488:03
2314.35:488:04
2414.35:498:04
2514.35:498:05
2614.35:508:05
2714.35:508:05
2814.25:518:06
2914.25:518:06
3014.25:528:06
3114.25:538:07

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.54 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.47 kWh/m² to a high of 6.54 kWh/m² in December across the year — December's 6.54 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.5Intense
96.5Intense
106.5Intense
116.5Intense
126.5Intense
136.5Intense
146.5Intense
156.5Intense
166.5Intense
176.5Intense
186.6Intense
196.6Intense
206.6Intense
216.6Intense
226.7Intense
236.7Intense
246.8Intense
256.8Intense
266.8Intense
276.9Intense
286.9Intense
296.9Intense
306.9Intense
316.9Intense
Planning a trip in December

Hazard calendar for Prestons

In seasonPeak

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

Prestons 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 December a good time to visit Prestons?

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

6.6
Sightseeing
8th-best month of the year
6.6
Beach & pool
2nd-best month of the year

December is a reasonable time to visit Prestons for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Prestons in December

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

In December, Prestons sees daytime highs around 27°C and nights near 16°C. Pack sun protection. Worth having: light clothes and rain gear. About 9 days see rain.

sun protectionlight clothesrain gear

Sea temperature near Prestons 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 31 km away) is warmest in February at about 23°C and coldest in August near 18°C.

It's comfortable for a long swim from Nov 16 to Jun 2 — about 6.5 months when the water holds above 20°C.

16°18°20°22°24°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb23Refreshing
Mar23Refreshing
Apr22Refreshing
May21Refreshing
Jun19Cool
Jul18Cool
Aug18Cool
Sep18Cool
Oct19Cool
Nov20Refreshing
Dec21Refreshing

UV index in Prestons in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Prestons peaks around January 14 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 14UV 12Jun 18UV 2
UV index (midday)Level
Jan12Extreme
Feb12Extreme
Mar9Very high
Apr6High
May4Moderate
Jun2Moderate
Jul3Moderate
Aug4Moderate
Sep5High
Oct8Very high
Nov10Very high
Dec12Extreme

Air quality in Prestons in December

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Prestons is worst in December — around 49 µg/m³ PM2.5 (poor), about 8.1× the cleanest month (June, 6 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorDec 1545 µg/m³Jun 236 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb7Good
Mar7Good
Apr8Good
May8Good
Jun6Good
Jul6Good
Aug8Good
Sep10Good
Oct10Good
Nov25Moderate
Dec49Poor
Location & terrain

Where is Prestons?

Prestons sits at 33.9°S, 150.9°E, 32 m above sea level, in Australia. The nearest listed city is Casula, 3.0 km away.

Topography around Prestons

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

Within 3 km, the terrain around Prestons has only modest variations in elevation — a maximum elevation change of 55 m around an average of 40 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 220 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,361 m.

The land around Prestons is covered by artificial surfaces (63%) and trees (22%) within 3 km, trees (39%), artificial surfaces (32%) and grassland (25%) within 16 km, and trees (59%) and water (25%) within 80 km.

3 km
55 m
16 km
220 m
80 km
1,361 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Casula 3.0 km · Liverpool 6.0 km · Cabramatta 8.0 km · Fairfield 11 km · Yagoona 14 km · Greystanes 15 km · Bankstown 15 km · Merrylands 16 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 Prestons (-33.9419°, 150.8717°, elevation 32 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. 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).