Muswellbrook weather in September

In September, Muswellbrook sees average daytime highs of 22°C and overnight lows near 9°C, with 37 mm of rain across 5.3 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 20°C in the first days to 23°C by the end. The sky is clear or mostly clear about 56% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 18 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Muswellbrook's 2nd-clearest and 1st-windiest month. For the whole year in context, see Muswellbrook's year-round climate.

Daytime high
22°
8th warmest
Overnight low
4th coldest
Rainfall
37 mm
5.3 wet days
Daylight
11 h 48 min
6:57 AM – 6:45 PM
Cloud cover
37%
2nd clearest
Wind
11 km/h
1st windiest
Solar energy
5.06 kWh/m²
Travel score
7.7
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 September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 20°C in the first days to 23°C by the end.

A typical September day in Muswellbrook reaches about 22°C in the afternoon and slips back to 9°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 27°C. Set against its neighbours, September runs about 3°C warmer than August and about 3°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
1208
2208
3208
4208
5208
6208
7208
8208
9218
10218
11219
12219
13219
14219
15219
16229
17229
18229
19229
20229
21229
222310
232310
242310
252310
262310
272310
282310
292310
302310

Muswellbrook weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 9th-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 September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 27%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16832
26931
36931
47030
57129
67129
77228
87327
97327
107327
117426
127426
137426
147525
157525
167525
177525
187525
197525
207525
217525
227525
237426
247327
257327
267228
277129
287129
296931
306931

Chance of precipitation in September

Any precipitation

Muswellbrook gets around 37 mm of rain over 5.3 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 18% and peaks near 19% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
119
219
319
419
519
619
719
819
919
1018
1118
1218
1318
1417
1517
1617
1716
1816
1916
2016
2116
2216
2316
2417
2517
2617
2718
2818
2919
3019

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 95% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
1982
2982
3982
4982
5982
6982
7982
8982
9982
10982
11973
12973
13973
14973
15964
16964
17964
18955
19955
20946
21946
22946
23937
24937
25928
26928
27919
28919
299010
309010

Wind in September

Winds average 11 km/h in September, the windiest month of the year.

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

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 18 min at the start of September to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over September. Sunrise moves from 7:17 AM to 6:37 AM, and sunset from 6:35 PM to 6:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.37:176:35
211.37:166:36
311.47:146:37
411.47:136:37
511.47:126:38
611.57:106:39
711.57:096:39
811.57:086:40
911.67:066:40
1011.67:056:41
1111.67:046:42
1211.77:026:42
1311.77:016:43
1411.76:596:44
1511.86:586:44
1611.86:576:45
1711.86:556:46
1811.96:546:46
1911.96:526:47
2011.96:516:47
2112.06:506:48
2212.06:486:49
2312.06:476:49
2412.16:466:50
2512.16:446:51
2612.16:436:51
2712.26:416:52
2812.26:406:53
2912.26:396:53
3012.36:376:54

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.06 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 — September's 5.06 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.4Bright
34.4Bright
44.5Bright
54.5Bright
64.6Bright
74.6Bright
84.7Bright
94.7Bright
104.8Bright
114.8Bright
124.9Bright
135.0Bright
145.0Bright
155.1Bright
165.1Bright
175.2Bright
185.2Bright
195.3Bright
205.3Bright
215.3Bright
225.4Bright
235.4Bright
245.4Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.6Bright
305.6Bright
Planning a trip in September

Is September a good time to visit Muswellbrook?

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

7.7
Sightseeing
2nd-best month of the year
5.0
Beach & pool
8th-best month of the year

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

What to pack for Muswellbrook in September

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

In September, Muswellbrook sees daytime highs around 22°C and nights near 9°C. Worth packing: sun protection. About 5 days see rain.

sun protection

UV index in Muswellbrook in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. 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 September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September 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
September 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).