It was a comparatively cold month for August with 11 frosts and close to 200mm of rain.
Rotorua weatherman Brian Holden's Springfield weather station recorded most of the frosts in the first half of the month, and 135.5mm of rain during August 19 and 20.
Mr Holden said it was a "wetter month than usual" but attributed that to the days that produced flooding and made up most of the total rainfall.
"Those two days of heavy rain and flooding contributed the most to the total rainfall for the month."
The normal rainfall for Rotorua is 163mm and this year Mr Holden recorded 198.6mm.