Average September Rainfall for the United Kingdom

The tables below give monthly averages for rainfall during September at cities and towns in the United Kingdom.

Each place has a total for how many days of wet weather it usually gets this month and for the normal amount of precipitation. The calculation of days only includes the days when precipitation totalled at least one millimetre (0.04 inches).

The month's total rainfall is an average of weather data collected from 1991 to 2020.

In September, the entire UK averages 12 days of rain, totalling 91 millimetres (3.6 inches).

Southern England

Average monthly precipitation in September
Days Place Inches Milli­metres
10 Birmingham 2.7 68
10 Bristol 2.5 65
Dover 2.5 64
10 Isles of Scilly 2.8 71
8 London, Greenwich 2.1 52
8 London, Kew Gardens 2.0 52
9 Norwich 2.3 60
10 Nottingham 2.3 57
10 Plymouth 2.8 72
9 Southampton 2.4 60
10 Stoke-on-Trent 2.5 65
8 Weymouth 2.2 55
8 Worthing 2.3 59

Northern England

September averages for total rainfall
Days Place Inches Milli­metres
Ambleside, Windermere Lake 6.4 163
Berwick-upon-Tweed 2.0 50
12 Dumfries 3.6 91
9 Hull 2.4 61
12 Liverpool 3.0 77
12 Manchester 3.0 76
Middlesbrough 2.1 52
10 Newcastle upon Tyne 2.8 72
13 Prestwick 3.1 79
12 Rochester, Northumberland Park 2.7 68
9 Sheffield 2.5 63

Wales

Average amount of rain in September
Days Place Inches Milli­metres
12 Cardiff 3.4 86
13 Harlech 3.3 83
Llandrindod Wells 3.1 77
11 Rhyl 2.9 73
11 Swansea 3.0 76

Scotland

Precipitation totals for September
Days Place Inches Milli­metres
10 Aberdeen 2.4 61
9 Dundee 2.1 54
10 Edinburgh 2.2 55
14 Glasgow 3.9 98
12 Inverness 2.5 63
15 Kirkwall, Orkney Islands 3.6 91
16 Lerwick, Shetland Islands 4.2 106
16 Stornoway, Outer Hebrides 4.1 104
15 Tiree, Inner Hebrides 4.1 104

Northern Ireland

Total precipitation during September
Days Place Inches Milli­metres
11 Armagh 2.6 65
12 Belfast 2.7 70
15 Castlederg 3.5 88
14 Londonderry 2.4 62
12 Warrenpoint  3.1 79
Reference

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

United Kingdom Precipitation
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