Warming trends showing up strongest in the cooler months. Data is from a Govt fruit research institute the Marlborough Research Centre on the town outskirts. Charts by the MRC. Blenheim population growth. Small town temperature data – often classed as “rural” in global databases – can usually be shown to be riddled with UHI warming.

Click for monthly charts – January — February —March —April—May—June—July—August—September—October—November—December
Here are the monthly trends in degrees C as per MRC.
Trends 1932 to 2011 or 2012.
Jan ~0.4
Feb -0.06
Mar 0.25
Apr 0.23
May 1.84
Jun 2.03
Jul 1.78
Aug 1.83
Sep 1.28
Oct 0.71
Nov 0.37
Dec 0.02