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Weather extremes
How extreme does Blenheim's weather get?
The hottest, coldest, wettest and snowiest days Blenheim has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.
The four kinds of extreme
The hottest, coldest, wettest and snowiest single days Blenheim has recorded — each shown against what a normal day that time of year looks like.
That is about 18°F hotter than a normal January afternoon in Blenheim (typical high near 72°F).
The three most extreme on record
About 13°F colder than a normal June night in Blenheim (typical low near 39°F).
The three most extreme on record
More rain in a single day than Blenheim usually gets in the whole month of December (typical December total about 3.3 in).
The three most extreme on record
How hot and cold it gets, month by month
The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.
Blenheim's record heat sits well above even a hot day for the season — January's 90°F is about 18°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.
In plain terms
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Nelson Aerodrome Aws, a weather station, about 67 km from the city centre. The underlying daily records come from NOAA's global station network.