Christchurch coldest day recorded at 0.4 degrees C – that is since 1863

It must be remembered that the period of our instrumental weather data is short when compared to say the ~15,000 years since the last ice age.

We must also remember that cold records are set in the face of the ever expanding urban heat island (UHI). So cold records are more remarkable than warm records that are assisted higher by the ever increasing UHI.

In this case the record could even more remarkable because the previous record in 1918 was set nearer the CBD in the Botanic Gardens, surrounded by suburbs – whereas since 1954 the instruments have been at the airport ~10kms away on the NW city fringe. UHI will be steadily creeping into the airport data too as suburbs grow and infill.

Thanks to Kiwis for tip off re NASA image.

2 comments to Christchurch coldest day recorded at 0.4 degrees C – that is since 1863

  • [...] Christchurch coldest day recorded at 0.4 degrees C – that is since 1863. Like this:LikeBe the first to like this post. [...]

  • Colleen Wright

    As if Christchurch residents haven’t suffered enough, now freezing temperatures have closed roads, universities, schools, flights. Those living in cracked, earthquake damaged homes were already struggling to heat their dwellings. Earthquake damaged fireplaces are not permitted to be repaired and no new homes are to have solid fuel-burning fireplaces due to pollution. Now many are suffering power outages as the weight of the snow has brought down power lines. Further inland the mercury plunged to -11.2C.
    The only people cheering about The Big Freeze are the skifield operators and those heading for the slopes. The impact of this week’s snowstorm on the South Island can be seen in this image released by NASA.

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