| Location | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Average |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Kaitaia | 6.0 | 5.4 | 4.6 | 3.2 | 2.4 | 1.9 | 2.1 | 2.8 | 3.8 | 4.7 | 5.5 | 6.1 | 4.1 |
| Auckland | 6.4 | 5.6 | 4.7 | 3.3 | 2.3 | 1.8 | 2.2 | 2.8 | 3.8 | 4.9 | 5.8 | 6.4 | 4.2 |
| Hamilton | 6.0 | 5.3 | 4.6 | 3.1 | 2.1 | 1.7 | 1.9 | 2.5 | 3.5 | 4.4 | 5.5 | 6.1 | 3.9 |
| Wellington | 6.6 | 5.5 | 4.5 | 2.9 | 1.8 | 1.4 | 1.6 | 2.3 | 3.4 | 4.7 | 5.8 | 6.3 | 3.9 |
| Nelson | 6.5 | 5.7 | 4.2 | 3.1 | 2.1 | 1.6 | 1.7 | 2.4 | 3.7 | 4.8 | 5.8 | 6.4 | 4.0 |
| Christchurch | 6.1 | 5.2 | 6.0 | 2.6 | 1.7 | 1.3 | 1.4 | 2.1 | 3.4 | 4.7 | 5.7 | 6.2 | 3.7 |
| Dunedin | 5.1 | 4.8 | 3.3 | 2.3 | 1.4 | 1.0 | 1.3 | 1.9 | 3.1 | 4.0 | 4.8 | 5.3 | 3.2 |
| Queenstown | 6.6 | 5.8 | 4.3 | 2.8 | 1.8 | 1.3 | 1.6 | 2.4 | 3.6 | 5.0 | 6.0 | 6.8 | 4.0 |
| Invercargill | 5.7 | 4.9 | 3.3 | 2.2 | 1.3 | 1.0 | 1.2 | 1.9 | 3.1 | 4.3 | 5.5 | 6.0 | 3.4 |
| Chatham Islands | 5.6 | 4.7 | 4.2 | 2.4 | 1.5 | 1.1 | 1.3 | 2.0 | 3.0 | 4.2 | 5.3 | 5.8 | 3.4 |
| Scott Base | 7.1 | 3.8 | 2.5 | 1.3 | 1.1 | 0.0 | 0.0 | 0.0 | 0.7 | 3.1 | 6.5 | 8.1 | 2.6 |
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