A high frequency of lows crossing NZ during April made for a wet, volatile month for most places.
Apr 2018 Climate Anomaly Maps ℅ NIWA.gif
Some very preliminary April 2018 figures for the main centres:
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Apr 2016 Average Temps, Rainfall, Sunshine and departures from 1981-2010 normals ℅ NIWA
Site T-max °C T-min °C T-mean °C Rain mm Sun hrs
Auckland, Mangere 20.9 +0.8 13.6 +1.2 17.3 +1.1 155 184% 145 90%
Auckland Aero 20.7 +0.7 13.7 +1.0 17.2 +0.9 155 183%
Tauranga Aero 20.7 +0.7 12.4 +1.1 16.6 +1.0 119 99% n/a n/a
Hamilton Aero 20.1 +0.2 9.8 +1.4 14.9 +0.7 102 117%
Hamilton, Ruakura 21.2 +1.3 9.5 +0.5 15.3 +0.8 95 114% 154 93%
Wellington, Kelburn 17.2 +0.6 11.3 +0.6 14.2 +0.5 112 132% 168 104%
Christchurch Aero 17.5 +0.1 5.9 -0.6 11.7 -0.2 118 267% 157 97%
Dunedin, Musselburgh 15.4 +0.1 8.1 -0.1 11.8 +0.1 155 304% 136 108%
Greymouth Aero 15.6 -1.1 8.7 -0.3 12.2 -0.8 247 127% 116 82%
Note that all MetService sites are missing a day's data around the 21st. Nevertheless, some notable rainfalls included well over 200mm around the western Bay of Plenty/Rotorua area, over 360mm in Westland towns and around 900mm at Milford Sound.
Edit: Amended Wellington's temp figures.
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