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Portland in September

Victoria, Australia · Spring Off-Peak
2.3/10
Comfort Score for September 3.1 below annual avg · 4.4 below national September avg
Ranked #194 of 213 cities for September comfort

September in Portland is peak spring, and the weather reflects it. You're looking at average daily highs of 14.8 degrees.

The average daily maximum is 14.8 degrees with overnight lows of 10.0 degrees. Manageable with a decent layer, and you'll warm up by midday.

September is 3.1 degrees cooler than Portland's yearly average.

Rainfall in September averages 90mm over about 17 days. That means roughly a 57% chance of rain on any given day, so definitely bring rain gear.

Sunshine-wise, September delivers around 11.8 MJ/m2 of daily solar radiation. UV sits in the high category. Sun protection is still a good idea, especially around midday.

September scores 2.3/10 on our Comfort Score. It's the tough end of the year weather-wise.

Packing tip: bring a proper winter jacket, waterproof gear, and serious sun protection.

The full data breakdown is below. You can also see how other Australian cities compare in September.

September at a Glance

Average High ▼
14.8°C
Daily maximum
3.1° below annual avg, 6.9° vs national avg
Average Low ▼
10.0°C
Overnight minimum
1.1° below annual avg, 1.7° vs national avg
Rainfall ▲
90mm
17 rain days
36.1mm above annual avg, 42.8mm vs national avg
Rain Probability
57%
Daily chance of rain
Solar Exposure
11.8
MJ/m2 per day
Humidity
59%
Moderate
Comfort ▼
2.3/10
Tough

Temperature Range

10.0°C
14.8°C

Daily temperature range in September. The bar shows the typical spread between overnight lows and afternoon highs.

What to Pack

Coming From Overseas?

How September in Portland stacks up against major cities around the world.

London
About 5 degrees cooler and considerably wetter.
New York
About 11 degrees cooler and considerably drier.
Tokyo
About 12 degrees cooler and considerably drier.

How September Compares

Portland's monthly climate at a glance. September is highlighted.

Month Max Min Rain Comfort
Jan 21.2 14.6 71mm 8.2
Feb 22.2 13.5 5mm 10.0
Mar 21.9 13.7 14mm 9.2
Apr 16.9 11.3 54mm 4.0
May 15.9 9.7 23mm 3.5
Jun 13.2 7.6 37mm 1.5
Jul 13.0 7.4 84mm 1.0
Aug 16.2 9.4 70mm 3.4
Sep 14.8 10.0 90mm 2.3
Oct 17.7 10.4 68mm 5.6
Nov 19.8 12.0 91mm 7.1
Dec 21.5 13.2 41mm 9.1

September in Other Australian Cities

Sydney in September22.2°C, 60mm Melbourne in September16.9°C, 62mm Brisbane in September25.7°C, 81mm Perth in September20.6°C, 27mm Adelaide in September17.7°C, 45mm Gold Coast in September25.1°C, 68mm Newcastle in September22.0°C, 57mm Canberra in September16.3°C, 26mm Sunshine Coast in September24.6°C, 47mm Wollongong in September20.3°C, 52mm Hobart in September14.4°C, 56mm Geelong in September16.7°C, 43mm Townsville in September27.1°C, 6mm Cairns in September27.1°C, 60mm Darwin in September31.9°C, 36mm Toowoomba in September23.0°C, 48mm Ballarat in September13.2°C, 77mm Bendigo in September15.9°C, 34mm Albury in September17.1°C, 36mm Launceston in September14.6°C, 92mm Mackay in September25.5°C, 11mm Rockhampton in September26.9°C, 4mm Bundaberg in September25.4°C, 9mm Bunbury in September18.4°C, 35mm Coffs Harbour in September22.6°C, 172mm Wagga Wagga in September18.0°C, 38mm Hervey Bay in September24.4°C, 14mm Shepparton in September17.7°C, 21mm Tamworth in September20.7°C, 54mm Port Macquarie in September21.9°C, 101mm Orange in September14.5°C, 22mm Dubbo in September20.3°C, 10mm Warrnambool in September14.9°C, 84mm Mildura in September21.8°C, 13mm Gladstone in September25.9°C, 8mm Bathurst in September16.5°C, 26mm Geraldton in September23.0°C, 8mm Mount Gambier in September14.8°C, 78mm Nowra in September21.1°C, 32mm Alice Springs in September27.6°C, 20mm Traralgon in September16.5°C, 56mm Lismore in September25.0°C, 121mm Caloundra in September24.7°C, 31mm Armidale in September17.3°C, 47mm Albany in September17.1°C, 35mm Kalgoorlie in September23.6°C, 8mm Emerald in September28.3°C, 1mm Broken Hill in September22.0°C, 13mm Grafton in September24.7°C, 103mm Whyalla in September22.5°C, 12mm Murray Bridge in September19.3°C, 22mm Port Augusta in September23.5°C, 8mm Port Lincoln in September17.6°C, 42mm Port Pirie in September21.2°C, 21mm Victor Harbor in September17.0°C, 26mm Mount Isa in September32.0°C, 0mm Longreach in September31.3°C, 4mm Roma in September26.7°C, 3mm Charleville in September27.9°C, 7mm Broome in September30.2°C, 8mm Karratha in September32.7°C, 33mm Port Hedland in September33.1°C, 26mm Esperance in September18.5°C, 21mm Carnarvon in September27.4°C, 1mm Exmouth in September30.0°C, 51mm Mandurah in September19.4°C, 37mm Rockingham in September19.7°C, 32mm Margaret River in September16.9°C, 40mm Griffith in September19.9°C, 25mm Mudgee in September18.4°C, 26mm Maitland in September23.1°C, 48mm Cessnock in September22.3°C, 50mm Tweed Heads in September23.6°C, 112mm Forster in September22.6°C, 54mm Byron Bay in September23.3°C, 160mm Kiama in September21.1°C, 46mm Katoomba in September15.0°C, 44mm Moree in September23.7°C, 35mm Inverell in September20.9°C, 57mm Cooma in September15.1°C, 24mm Young in September16.5°C, 38mm Parkes in September18.6°C, 26mm Forbes in September19.4°C, 23mm Cowra in September18.3°C, 21mm Goulburn in September15.7°C, 30mm Lithgow in September15.4°C, 39mm Singleton in September23.2°C, 48mm Muswellbrook in September21.8°C, 61mm Narrabri in September22.5°C, 56mm Bourke in September25.7°C, 5mm Lightning Ridge in September25.2°C, 22mm Hay in September20.2°C, 21mm Deniliquin in September19.2°C, 20mm Jindabyne in September13.3°C, 65mm Batemans Bay in September21.4°C, 26mm Ulladulla in September20.9°C, 50mm Merimbula in September18.9°C, 27mm Wodonga in September17.0°C, 37mm Wangaratta in September17.0°C, 31mm Echuca in September18.6°C, 22mm Horsham in September16.7°C, 29mm Hamilton in September14.4°C, 67mm Colac in September14.8°C, 87mm Sale in September17.9°C, 66mm Bairnsdale in September18.2°C, 62mm Lakes Entrance in September17.6°C, 78mm Swan Hill in September19.7°C, 31mm Benalla in September16.6°C, 32mm Wonthaggi in September15.1°C, 104mm Lorne in September15.7°C, 70mm Bright in September15.9°C, 72mm Falls Creek in September6.5°C, 80mm Noosa in September23.6°C, 29mm Maryborough in September25.9°C, 19mm Gympie in September26.1°C, 24mm Warwick in September24.0°C, 48mm Dalby in September25.9°C, 33mm Kingaroy in September24.0°C, 37mm Biloela in September26.8°C, 3mm Yeppoon in September25.5°C, 9mm Bowen in September26.7°C, 8mm Ayr in September27.7°C, 12mm Innisfail in September26.9°C, 84mm Atherton in September23.3°C, 43mm Port Douglas in September25.6°C, 130mm Cooktown in September27.6°C, 25mm Weipa in September34.0°C, 10mm Charters Towers in September29.3°C, 4mm Cloncurry in September32.9°C, 1mm Winton in September32.2°C, 1mm Birdsville in September29.3°C, 12mm Stanthorpe in September20.3°C, 34mm Ceduna in September21.4°C, 17mm Coober Pedy in September25.1°C, 20mm Renmark in September22.0°C, 9mm Berri in September21.9°C, 8mm Clare in September17.1°C, 26mm Barossa Valley in September17.0°C, 47mm Goolwa in September18.0°C, 26mm Kingscote in September17.2°C, 46mm Naracoorte in September16.0°C, 43mm Devonport in September14.1°C, 92mm Burnie in September13.8°C, 108mm Ulverstone in September13.5°C, 105mm St Helens in September15.2°C, 87mm Strahan in September11.9°C, 337mm Cradle Mountain in September5.8°C, 346mm Swansea in September15.8°C, 46mm Queenstown in September11.1°C, 417mm Katherine in September35.8°C, 14mm Tennant Creek in September32.2°C, 21mm Nhulunbuy in September30.3°C, 22mm Yulara in September27.1°C, 70mm Kununurra in September35.9°C, 53mm Newman in September29.3°C, 43mm Tom Price in September28.9°C, 34mm Meekatharra in September27.3°C, 10mm Northam in September20.9°C, 16mm Katanning in September17.5°C, 19mm Denmark in September16.8°C, 78mm Dunsborough in September17.8°C, 29mm Penrith in September22.4°C, 38mm Richmond in September23.2°C, 41mm Campbelltown in September22.0°C, 36mm Gosford in September22.5°C, 61mm Sunbury in September15.3°C, 68mm Bacchus Marsh in September16.4°C, 72mm Ocean Grove in September16.6°C, 50mm Torquay in September16.7°C, 45mm Phillip Island in September15.6°C, 55mm Daylesford in September12.2°C, 72mm Airlie Beach in September24.9°C, 24mm Mission Beach in September25.2°C, 79mm Seventeen Seventy in September24.9°C, 4mm Agnes Water in September24.7°C, 4mm Rainbow Beach in September24.3°C, 32mm Coolangatta in September23.6°C, 112mm Surfers Paradise in September25.1°C, 68mm Thredbo in September6.8°C, 95mm Perisher in September7.6°C, 108mm Nelson Bay in September22.3°C, 55mm Terrigal in September21.7°C, 69mm Lennox Head in September23.4°C, 161mm Yamba in September23.6°C, 133mm Narooma in September21.1°C, 20mm Eden in September18.8°C, 35mm Coral Bay in September29.2°C, 7mm Monkey Mia in September28.0°C, 1mm Kalbarri in September25.2°C, 3mm Jurien Bay in September22.2°C, 14mm Busselton in September18.2°C, 31mm Walpole in September16.5°C, 64mm McLaren Vale in September16.4°C, 92mm Hahndorf in September15.0°C, 58mm Robe in September15.1°C, 74mm Jabiru in September36.6°C, 30mm Mataranka in September35.4°C, 10mm Bicheno in September15.0°C, 64mm Bruny Island in September13.4°C, 78mm Port Arthur in September14.1°C, 54mm White Cliffs in September24.0°C, 6mm Tibooburra in September25.1°C, 9mm Oodnadatta in September26.7°C, 30mm Marree in September25.8°C, 12mm Marble Bar in September34.1°C, 16mm Halls Creek in September33.4°C, 92mm Fitzroy Crossing in September36.7°C, 23mm Wyndham in September35.7°C, 32mm Thursday Island in September29.9°C, 18mm Norfolk Island in September18.8°C, 56mm Christmas Island in September25.2°C, 23mm Lord Howe Island in September18.9°C, 107mm

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