Oamaru Weather in May
What's the weather like in Oamaru (Otago) in May 2026?
The climate in Oamaru during May can be summarized as cool and reasonably dry.
May is in the fall / autumn in Oamaru and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a cool 14°C (56°F), whilst at night 3°C (37°F) is normal.
| Daytime temperature | 13.6°C 56.4°F |
|---|---|
| Nightly temperature | 2.7°C 36.8°F |
| Average temperature | 8.1°C 46.6°F |
| Daily sunshine | 4.4 hrs |
| Avg rainfall | 46 mm 1.8 ins |
| Rainy days | 9 days |
| Sea temperature | 10.8°C 51.4°F |
| Humidity | 81% |
| Windspeed | 12.2kph 8 mph |
On average May is the 5th wettest month of the year in Oamaru with around 46mm 1.8 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 4.4 hours of sunshine per day.
May temperatures in Oamaru
May rainfall
May hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Oamaru in May 2025.
Other monthly averages
Oamaru weather stats
| Hottest month: | January | 20.5°C 68.9°F |
|---|---|---|
| Driest month: | September | 29mm 1.1ins |
| Sunniest month: | April | 5.1hrs |
| Coldest month: | July | 10.3°C 50.5°F |
| Wettest month: | March | 56mm 2.2ins |
© Google
Top New Zealand locations
- Abel Tasman National Park
- Auckland
- Christchurch
- Dunedin
- Kaikoura
- Milford Sound
- Napier
- Nelson
- Queenstown
- Rotorua
- Taupo
- Wanaka
- Wellington