Average September Temperatures in the United Kingdom

Average temperatures for September at cities and towns throughout the United Kingdom are listed below in degrees Celsius and Fahrenheit.

The tables give the normals for maximum and minimum daily temperatures based on weather data collected from 1991 to 2020.

Across the UK, September temperatures average a daily high of 17 degrees Celsius (62 degrees Fahrenheit) and a low of 9 °C (48 °F).

Southern England

Average September temperatures
High °F Low °F Place High °C Low °C
65 49 Birmingham 18 10
65 49 Bristol 18 9
66 55 Dover 19 13
65 56 Isles of Scilly 18 13
69 53 London, Greenwich 20 12
69 51 London, Kew Gardens 20 11
66 51 Norwich 19 10
65 50 Nottingham 18 10
65 53 Plymouth 18 12
68 53 Southampton 20 12
65 49 Stoke-on-Trent 18 9
66 55 Weymouth 19 13
66 52 Worthing 19 11

Northern England

Average daily temperatures in September
High °F Low °F Place High °C Low °C
63 49 Ambleside, Windermere Lake 17 10
61 49 Berwick-upon-Tweed 16 10
63 49 Dumfries 17 10
66 51 Hull 19 11
64 52 Liverpool 18 11
64 49 Manchester 18 10
64 48 Middlesbrough 18 9
63 50 Newcastle upon Tyne 17 10
62 50 Prestwick 17 10
61 45 Rochester, Northumberland Park 16 7
64 51 Sheffield 18 10

Wales

September temperatures: daily averages
High °F Low °F Place High °C Low °C
66 51 Cardiff 19 11
64 51 Harlech 18 11
64 48 Llandrindod Wells 18 9
63 51 Rhyl 17 11
64 55 Swansea 18 13

Scotland

Average September temperatures
High °F Low °F Place High °C Low °C
61 48 Aberdeen 16 9
62 48 Dundee 17 9
62 49 Edinburgh 17 10
62 50 Glasgow 17 10
62 48 Inverness 17 9
58 49 Kirkwall, Orkney Islands 14 9
55 48 Lerwick, Shetland Islands 13 9
59 49 Stornoway, Outer Hebrides 15 9
59 51 Tiree, Inner Hebrides 15 10

Northern Ireland

Average September temperatures
High °F Low °F Place High °C Low °C
63 49 Armagh 17 10
63 49 Belfast 17 10
62 48 Castlederg 17 9
62 50 Londonderry 17 10
63 52 Warrenpoint  17 11
Reference

Met Office. Research programmes. Climate science. UK Climate Averages.

United Kingdom Temperatures
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