New Zealand had the ninth warmest August on record, with temperatures 0.5 to 1.2C above average.
The warmth was caused by west and northwest winds flowing across warm seas, Niwa said.
The Whanganui region had 120 to 140 per cent more rain than usual. On August 6 there was an avalanche at the Turoa ski area, and the Desert Road was closed by snow and ice on August 23-24.
Hunterville and Mangaweka residents are asked to conserve water until further notice.
Rangitīkei District Council says due to recent weather conditions, the water entering treatment plants from the Rangitīkei River is poor quality so the plants have been turned off or flows have been reduced.
Dairy farmers considering a role on DairyNZ's board of directors have until September 14 to get their nominations in.
This year one farmer director is being elected, and will join four other farmer-elected directors and three board-appointed directors on the board.
All farmers paying a levy on milksolids to DairyNZ are eligible to stand. For more information on the nomination process, visit dairynz.co.nz/agm.
Open mic night
Whanganui Musicians' Club Night is on Friday at the Savage Club, 65 Drews Ave, doors open 7pm. Open mic (have a go) and music from TamaKmuzik. Bring drinks and nibbles.
Entry $5 members, $10 non-members. Inquiries to Annie Keating 021 154 615 or Clare Gibney 021 0227 9729.