Rotorua weather by month
Rotorua runs from about 8°C in July to 19°C in January, with June the wettest month at 165 mm.
warmest month
January
19°C
coolest month
July
8°C
wettest month
June
165 mm
worst air month
November
5 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 19°C | 108 mm | 350 h | 4 |
| February | 18°C | 49 mm | 308 h | 5 |
| March | 15°C | 68 mm | 294 h | 4 |
| April | 13°C | 90 mm | 234 h | 4 |
| May | 9°C | 105 mm | 254 h | 4 |
| June | 10°C | 165 mm | 198 h | 3 |
| July | 8°C | 130 mm | 202 h | 3 |
| August | 9°C | 74 mm | 202 h | 3 |
| September | 11°C | 73 mm | 270 h | 4 |
| October | 12°C | 152 mm | 297 h | 4 |
| November | 15°C | 56 mm | 310 h | 5 |
| December | 18°C | 115 mm | 341 h | 5 |
About 3,260 hours of sun a year. Roughly 120 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-24. Full method, licences and the list of sources we rejected are on the methodology page.