Muswellbrook weather in December

In December, Muswellbrook sees average daytime highs of 29°C and overnight lows near 16°C, with 67 mm of rain across 8 wet days and about 14.1 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 41% of the time in December, and the air most often feels comfortable.

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 Muswellbrook's 9th-clearest and 4th-windiest month. For the whole year in context, see Muswellbrook's year-round climate.

Daytime high
29°
3rd warmest
Overnight low
16°
10th coldest
Rainfall
67 mm
8 wet days
Daylight
14 h 06 min
5:49 AM – 7:56 PM
Cloud cover
50%
9th clearest
Wind
11 km/h
4th windiest
Solar energy
6.74 kWh/m²
Travel score
6.0
out of 10

Muswellbrook is town in New South Wales, Australia.

Air quality
Moderate
PM2.5 12.2 µg/m³ · 2019

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 29°C through the month.

A typical December day in Muswellbrook reaches about 29°C in the afternoon and slips back to 16°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 35°C. Set against its neighbours, December runs about 2°C warmer than November and about 2°C cooler than January.

10°20°30°40°151015202531
Avg high (°C)Avg low (°C)
12816
22816
32816
42816
52816
62816
72816
82816
92816
102816
112816
122816
132916
142916
152916
162916
172917
182917
192917
202917
212917
222917
232917
242917
252917
262917
272917
282917
292917
303017
313017

Muswellbrook weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 18°597.613.95.3
Feb29° / 18°707.213.25.9
Mar27° / 16°527.412.27.1
Apr23° / 12°384.911.27.9
May20° / 345.110.47.2
Jun17° / 466.39.95.9
Jul16° / 36510.15.9
Aug18° / 314.710.87.0
Sep22° / 375.311.87.7
Oct24° / 12°51712.87.7
Nov27° / 14°708.413.76.9
Dec29° / 16°67814.16.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 18% of December, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25743
35743
45743
55743
65743
75743
85743
95743
105743
115743
125842
135842
145941
155941
165941
175941
186040
196040
206139
216139
226139
236238
246238
256337
266337
276238
286238
296238
306337
316337

Chance of precipitation in December

Any precipitation

Muswellbrook gets around 67 mm of rain over 8 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 26% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
128
228
328
428
528
628
728
828
928
1027
1127
1226
1326
1425
1525
1625
1725
1825
1925
2025
2125
2225
2324
2424
2524
2624
2724
2824
2923
3023
3123

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the comfortable band about 35% of days. Sticky, muggy-or-worse air turns up on roughly 5% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14629242
24629242
34529242
44429252
54429253
64329253
74229253
84130263
94031264
103931264
113832264
123633265
133534265
143435265
153336265
163236266
173137276
183037276
192937276
202838286
212838287
222738287
232739287
242639287
252639287
262539287
272539298
282438298
292438308
302437308
312436309

Wind in December

Winds average 11 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

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 5:47 AM to 5:57 AM, and sunset from 7:45 PM to 8:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:477:45
214.05:477:46
314.05:477:47
414.05:477:47
514.05:477:48
614.05:477:49
714.05:477:50
814.05:487:50
914.15:487:51
1014.15:487:52
1114.15:487:53
1214.15:487:53
1314.15:497:54
1414.15:497:55
1514.15:497:55
1614.15:497:56
1714.15:507:56
1814.15:507:57
1914.15:517:57
2014.15:517:58
2114.15:517:58
2214.15:527:59
2314.15:527:59
2414.15:538:00
2514.15:538:00
2614.15:548:01
2714.15:548:01
2814.15:558:01
2914.15:568:02
3014.15:568:02
3114.15:578:02

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.74 kWh/m².

For context, solar energy here swings from a low near 2.46 kWh/m² to a high of 6.82 kWh/m² in January across the year — December's 6.74 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
46.7Intense
56.7Intense
66.7Intense
76.7Intense
86.7Intense
96.7Intense
106.7Intense
116.7Intense
126.7Intense
136.7Intense
146.7Intense
156.8Intense
166.8Intense
176.8Intense
186.8Intense
196.8Intense
206.8Intense
216.9Intense
226.9Intense
236.9Intense
247.0Intense
257.0Intense
267.1Intense
277.1Intense
287.1Intense
297.2Intense
307.2Intense
317.2Intense
Planning a trip in December

Is December a good time to visit Muswellbrook?

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

6.0
Sightseeing
8th-best month of the year
7.4
Beach & pool
1st-best month of the year

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

What to pack for Muswellbrook in December

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

In December, Muswellbrook sees daytime highs around 29°C and nights near 16°C. Pack light clothes and sun protection. Worth having: rain gear. About 8 days see rain.

light clothessun protectionrain gear

UV index in Muswellbrook 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 Muswellbrook peaks around January 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 17UV 13Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar9Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug5Moderate
Sep6High
Oct9Very high
Nov10Extreme
Dec12Extreme

Air quality in Muswellbrook 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 Muswellbrook is worst in December — around 45 µg/m³ PM2.5 (poor), about 7.1× the cleanest month (June, 6 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Muswellbrook's WHO annual average of 12.2 µg/m³.

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModeratePoorDec 1741 µg/m³Jun 206 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb10Good
Mar8Good
Apr8Good
May7Good
Jun6Good
Jul7Good
Aug8Good
Sep8Good
Oct10Good
Nov14Moderate
Dec45Poor
Location & terrain

Where is Muswellbrook?

Muswellbrook sits at 32.3°S, 150.9°E, 164 m above sea level, in Australia. The nearest listed city is Cessnock, 77 km away.

Topography around Muswellbrook

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

Within 3 km, the terrain around Muswellbrook has only modest variations in elevation — a maximum elevation change of 170 m around an average of 165 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 635 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,689 m.

The land around Muswellbrook is covered by grassland (37%) and trees (29%) within 3 km, grassland (57%) and trees (30%) within 16 km, and trees (59%) and grassland (36%) within 80 km.

3 km
170 m
16 km
635 m
80 km
1,689 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Cessnock 77 km · Maitland 82 km · Newcastle 112 km · Tamworth 130 km · Central Coast 138 km · Umina Beach 146 km · Taree 152 km · Pittwater 161 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 Muswellbrook (-32.2612°, 150.8901°, elevation 164 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. 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).