Overview: Upper HuttUpper Hutt (New Zealand) is a place with a mild climate. Temperatures during the day are in the range from 11 °C (52 °F) in July to 22 °C (71 °F) in February. Temperatures during the night go from 4 °C (39 °F) in July to 13 °C (55 °F) in February. The least rainy month in Upper Hutt is February with its 8 days of rain, the rainiest month is June, when it rains 14 days.