Average September Rainfall for New Zealand

The tables below list monthly averages for rainfall during September at cities, towns, beaches and islands throughout New Zealand.

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

The month's precipitation statistics are long-term historical averages of weather data collected during 1991 to 2020.

North Island

Average monthly precipitation in September
Days Place Inches Milli­metres
12 Auckland 3.9 100
11 Cape Reinga 3.2 81
9 Gisborne 2.8 71
14 Great Barrier Island 5.2 132
13 Hamilton 3.9 100
14 Kaikohe 4.9 124
13 Kaitaia 4.8 122
14 Kerikeri 6.3 159
10 Masterton 2.9 73
7 Napier 2.3 58
14 New Plymouth 4.8 123
12 Palmerston North 3.5 89
11 Rotorua 4.2 107
11 Taupo 3.1 79
11 Tauranga 3.4 87
12 Thames 3.6 92
12 Waiheke Island 4.2 107
12 Wellington 4.3 108
17 Whakapapa Village, Tongariro 11.1 283
11 Whangaparaoa 3.4 88
13 Whangarei 4.4 112
13 Whitianga 6.5 165
11 Whanganui 3.0 76

South Island

September averages for total rainfall
Days Place Inches Milli­metres
8 Akaroa 2.9 75
17 Arthur's Pass 17.8 453
7 Blenheim 2.1 54
6 Christchurch 1.6 40
8 Dunedin 1.9 47
12 Farewell Spit 4.5 116
17 Franz Josef 20.5 520
17 Greymouth 7.9 202
14 Invercargill 3.5 90
7 Kaikoura  2.1 54
14 Lake Rotoiti 6.1 154
7 Lake Tekapo 1.3 34
12 Manapouri 4.2 106
17 Milford Sound 21.3 541
15 Mt Cook 14.2 361
10 Nelson 3.3 85
9 Queenstown 3.2 81
19 Secretary Island 12.4 315
6 Timaru 1.3 34
17 Westport 7.2 183

Other Islands

Rainfall averages for September
Days Place Inches Milli­metres
16 Auckland Islands 3.4 87
21 Campbell Island 4.4 113
12 Chatham Island 2.8 71
11 Raoul Island  4.5 113
16 Stewart Island, Oban 4.8 123
Reference

NIWA (New Zealand National Institute of Water and Atmospheric Research). The National Climate Database.

New Zealand Rainfall
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