Umina Beach weather in December

In December, Umina Beach sees average daytime highs of 25°C and overnight lows near 18°C, with 70 mm of rain across 10.3 wet days and about 14.2 hours of daylight. It is the 3rd-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 35% 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 Umina Beach's 10th-clearest and 6th-windiest month. For the whole year in context, see Umina Beach's year-round climate.

Daytime high
25°
3rd warmest
Overnight low
18°
9th coldest
Rainfall
70 mm
10.3 wet days
Daylight
14 h 12 min
5:45 AM – 7:57 PM
Cloud cover
55%
10th clearest
Wind
14 km/h
6th windiest
Solar energy
6.49 kWh/m²
Travel score
7.0
out of 10

Umina Beach is suburb of Central Coast, 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 25°C through the month.

A typical December day in Umina Beach reaches about 25°C in the afternoon and slips back to 18°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 29°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°151015202531
Avg high (°C)Avg low (°C)
12417
22417
32417
42417
52417
62417
72417
82418
92418
102418
112418
122418
132418
142418
152418
162418
172518
182518
192518
202518
212518
222518
232518
242518
252518
262518
272519
282519
292519
302519
312519

Umina Beach weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 19°7810.5146.7
Feb25° / 20°10111.113.26.5
Mar24° / 18°891212.36.8
Apr22° / 15°7710.211.26.8
May19° / 13°709.110.36.5
Jun17° / 11°869.69.85.7
Jul17° / 497.2105.9
Aug18° / 10°496.510.86.7
Sep20° / 12°516.811.87.1
Oct22° / 14°628.512.87.0
Nov23° / 16°811013.76.8
Dec25° / 18°7010.314.27.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25149
35149
45050
54951
65050
75050
85050
95050
105149
115149
125248
135248
145248
155248
165248
175248
185248
195248
205248
215248
225248
235347
245347
255347
265446
275347
285347
295347
305446
315545

Chance of precipitation in December

Any precipitation

Umina Beach gets around 70 mm of rain over 10.3 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 33% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
235
335
435
535
635
734
834
934
1033
1133
1232
1332
1432
1532
1632
1732
1833
1933
2033
2133
2233
2333
2433
2533
2632
2732
2833
2933
3033
3133

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 39% of days. Sticky, muggy-or-worse air turns up on roughly 19% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1243232120
2243132130
3233132130
4223133140
5223133140
6213133150
7203034150
8203035160
9193035160
10182936160
11172937170
12172938170
13162838170
14152839180
15152740180
16142641180
17142641190
18142542190
19142442200
20142442200
21142343200
22132343210
23132243210
24132243210
25132243220
26132144220
27122144231
28122044231
29122044241
30122044241
31122043251

Wind in December

Winds average 14 km/h in December.

Across December, daily wind ranges from about 14 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

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 5:52 AM, and sunset from 7:46 PM to 8:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:437:46
214.15:437:47
314.15:437:48
414.15:437:49
514.15:437:50
614.15:437:50
714.15:437:51
814.25:437:52
914.25:437:53
1014.25:437:53
1114.25:437:54
1214.25:437:55
1314.25:447:55
1414.25:447:56
1514.25:447:57
1614.25:457:57
1714.25:457:58
1814.25:457:58
1914.25:467:59
2014.25:467:59
2114.25:468:00
2214.25:478:00
2314.25:478:01
2414.25:488:01
2514.25:488:02
2614.25:498:02
2714.25:508:03
2814.25:508:03
2914.25:518:03
3014.25:518:03
3114.25:528:04

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.49 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.46 kWh/m² to a high of 6.49 kWh/m² in January across the year — December's 6.49 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.4Intense
26.4Intense
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
186.5Intense
196.5Intense
206.6Intense
216.6Intense
226.6Intense
236.7Intense
246.7Intense
256.8Intense
266.8Intense
276.8Intense
286.9Intense
296.9Intense
306.9Intense
316.9Intense
Planning a trip in December

Hazard calendar for Umina Beach

In seasonPeak

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

Umina Beach 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 Umina Beach?

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

7.0
Sightseeing
2nd-best month of the year
6.1
Beach & pool
2nd-best month of the year

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

What to pack for Umina Beach in December

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

In December, Umina Beach sees daytime highs around 25°C and nights near 18°C. Pack sun protection. Worth having: light clothes and rain gear. About 10 days see rain.

sun protectionlight clothesrain gear

Sea temperature near Umina Beach 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 13 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 4 — about 6.6 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
Jun20Cool
Jul19Cool
Aug18Cool
Sep18Cool
Oct19Cool
Nov20Refreshing
Dec21Refreshing

UV index in Umina Beach 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 Umina Beach peaks around January 16 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 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 16UV 12Jun 19UV 2
UV index (midday)Level
Jan12Extreme
Feb11Extreme
Mar9Very high
Apr6High
May4Moderate
Jun2Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov10Very high
Dec12Extreme
Location & terrain

Where is Umina Beach?

Umina Beach sits at 33.5°S, 151.3°E, 10 m above sea level, in Australia. The nearest listed city is Central Coast, 12 km away.

Topography around Umina Beach

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

Within 3 km, the terrain around Umina Beach has only modest variations in elevation — a maximum elevation change of 196 m around an average of 40 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 288 m; within 80 km, large variations in elevation — a maximum elevation change of 921 m.

The land around Umina Beach is covered by trees (45%), water (26%) and artificial surfaces (25%) within 3 km, trees (51%) and water (41%) within 16 km, and trees (55%) and water (32%) within 80 km.

3 km
196 m
16 km
288 m
80 km
921 m
treesgrasslandartificial surfacesbare terrainwater
December weather nearby: Central Coast 12 km · Pittwater 16 km · Dee Why 25 km · Saint Ives 27 km · Hornsby 28 km · Wahroonga 28 km · Manly 31 km · Chatswood 33 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 Umina Beach (-33.5231°, 151.3133°, elevation 10 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).