Blenheim monthly weather averages

Contents

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Blenheim

Blenheim average temperature chart (Celsius) Blenheim average temperature chart (Fahrenheit)
Average monthly temperatures in Blenheim (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 23.3 23.2 21.2 17.9 14.4 11.8 11.2 12.6 14.6 17.2 19.2 21.5
°F 73.9 73.7 70.1 64.3 57.9 53.2 52.1 54.7 58.3 62.9 66.5 70.6

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Blenheim monthly rainfall chart (mm) Blenheim monthly rainfall chart (inches)
Average monthly rainfall in Blenheim (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 67 43 68 77 82 75 92 95 74 83 66 65
inches 2.6 1.7 2.7 3 3.2 2.9 3.6 3.7 2.9 3.3 2.6 2.6
Rainy days 6 5 8 8 9 8 10 9 9 10 8 8

Average annual rainfall in Blenheim: 1018.534mm (401 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Blenheim

Blenheim average daily sunshine chart
Average daily sunshine Blenheim
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 8.5 8.2 6.6 6.1 5.4 4.9 5 5.5 6 7.2 7.7 7.7

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Blenheim average minimum / maximum temperatures (Celsius) Blenheim average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Blenheim (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 11.5 11 10.2 7 4 1.6 1 2.2 4.4 6.2 8.2 10.1
Max °C 23.6 23.5 21.5 18.2 14.7 12.1 11.4 12.9 14.9 17.5 19.5 21.8
Min °F 52.6 51.7 50.3 44.6 39.1 34.8 33.8 35.9 39.8 43.1 46.7 50.1
Max °F 63.5 63 60.4 54.7 48.7 44.2 43.2 45.5 49.3 53.2 56.8 60.6

Sea temperature

The graph below shows the average sea temperature.

Blenheim average sea temperature chart (Celsius) Blenheim average sea temperature chart (Fahrenheit)
Average sea temperature around Blenheim in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 16.9 17.7 17.2 16.1 14.8 13.5 12.7 12.3 12.4 13 14.1 15.6
°F 62.4 63.9 62.9 60.9 58.6 56.3 54.9 54.2 54.4 55.4 57.3 60

Wind speed

The graph below shows the average wind speed.

Blenheim average winspeed by month (km/h) Blenheim average winspeed by month (mph)
Average wind speed in Blenheim (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 18 16 16 15 15 14 14 15 17 18 18 18
mph 11 10 10 9 9 9 9 9 11 11 11 11

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Blenheim relative humidity averages
Average relative humidity in Blenheim
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
69% 73% 75% 77% 81% 83% 82% 80% 75% 71% 71% 72%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Blenheim weather stats

Blenheim weather statistics
Hottest month: January 23.3°C 73.9°F
Driest month: February 43mm 1.7ins
Sunniest month: February 8.2hrs
Coldest month: July 11.2°C 52.2°F
Wettest month: August 95mm 3.7ins
Warmest sea: February 17.7°C 63.9°F
Map showing location of Blenheim (-41.51603, 173.9528) Blenheim map pin © Google

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