UPDATED MONDAY — We have an even more detailed update, taking a look at rain maps for 6am, 12noon and 6pm on December 25th.
Generally speaking high pressure is nearby and showers will expand across New Zealand thanks to daytime heating. It means while some areas may have a high risk of a shower or downpour, they will be a bit hit and miss.
Temperatures are well down in some southern and eastern regions – of both islands but especially the south eastern South Island.
The maps below paint a picture of light showers in the North Island in the morning expanding inland with daytime heating to create afternoon downpours (and possibly some isolated inland thunderstorms). Sea breezes / light winds will then drift these downpours. Each day the maps we’ve looked at have shifted the downpours around but regions like WAIKATO, inland BOP, CENTRAL PLATEAU and the HAWKE’S BAY RANGES areas appear to be highest risk areas for afternoon downpours. There may also be some isolated thunderstorms.
In the South Island showers are likely to hug Dunedin for a time but dry elsewhere, then afternoon downpours develop along the ranges – easing in the evening.
Many places will have fairly pleasant temperatures but definitely some candidates are looking to have a cool day.
It’s still looking a little cold in coastal Southland and some parts of Otago with highs of just 11 to 16 degrees for many places.
Further north and along the eastern side of both islands a cooler breeze will blow. Canterbury has highs from just 14 in some coastal areas up to around 20 well inland. Christchurch has a high of only around 15 to 17 degrees.
Some parts of Wairarapa, Wellington and Hawke’s Bay may not climb out of the mid to late teens.
Inland you may climb over 20 degrees but cloud build ups further inland may limit how hot it gets. Northern NZ (Waikato northwards) looks to be warmest with highs in the mid 20s possible and could “feel like” over 30 degrees in some sunny, sheltered, inland areas.
Not much in the way of wind on Christmas Day with variable breezes natinowide.
*THIS IS OUR FINAL UPDATE FOR CHRISTMAS DAY – Please refer to your local 10 day and hourly forecasts for more details over the next day or two ahead.
6AM DEC 25:
12NOON DEC 25
6PM DEC 25
**Please refer to your local 10 day and hourly forecasts to fine tune the above, we have thousands of NZ locations**
on 22/12/2019 10:06am
Great getting SE wind flow, cooler.
MERRY CHRISTMAS to all
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