Caernarfon monthly weather averages

Contents

Average daytime temperature

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

Caernarfon average temperature chart (Celsius) Caernarfon average temperature chart (Fahrenheit)
Average monthly temperatures in Caernarfon (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6.7 6.6 8.2 10.6 13.9 16.5 17.9 17.9 15.9 13.4 9.4 7.7
°F 44 43.8 46.8 51.1 57 61.7 64.3 64.2 60.7 56.1 49 45.9

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.

Caernarfon monthly rainfall chart (mm) Caernarfon monthly rainfall chart (inches)
Average monthly rainfall in Caernarfon (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 164 111 128 92 90 94 99 132 141 174 184 184
inches 6.5 4.4 5.1 3.6 3.5 3.7 3.9 5.2 5.6 6.8 7.2 7.2
Rainy days 21 16 19 15 16 15 14 16 17 20 21 21

Average annual rainfall in Caernarfon: 1640.933mm (646 inches)

Average daily sunshine

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

Caernarfon average daily sunshine chart
Average daily sunshine Caernarfon
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 1.7 2.9 3.7 5.6 6.9 6.8 6 5.8 4.6 3.4 2.1 1.5

Day / night temperatures

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

Caernarfon average minimum / maximum temperatures (Celsius) Caernarfon average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Caernarfon (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 2 1.5 2.7 4 6.6 9.3 11.1 11.2 9.7 7.7 4.5 3
Max °C 6.8 6.7 8.4 10.8 14.1 16.7 18.1 18.1 16.1 13.5 9.6 7.9
Min °F 35.6 34.7 36.8 39.2 43.8 48.7 52 52.1 49.5 45.9 40 37.3
Max °F 39.9 39.4 41.9 45.3 50.5 55.4 58.3 58.3 55.2 51.1 44.6 41.7

Sea temperature

The graph below shows the average sea temperature.

Caernarfon average sea temperature chart (Celsius) Caernarfon average sea temperature chart (Fahrenheit)
Average sea temperature around Caernarfon in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.4 7.4 7.3 8.3 10.2 12.5 14.5 15.3 15.1 13.9 12.1 10.2
°F 47.2 45.3 45.2 46.9 50.4 54.6 58 59.6 59.2 57.1 53.9 50.4

Wind speed

The graph below shows the average wind speed.

Caernarfon average winspeed by month (km/h) Caernarfon average winspeed by month (mph)
Average wind speed in Caernarfon (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 24 22 22 19 18 17 17 17 20 22 23 24
mph 15 14 14 12 11 11 10 11 12 14 14 15

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.

Caernarfon relative humidity averages
Average relative humidity in Caernarfon
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
88% 86% 85% 82% 81% 83% 84% 85% 86% 87% 88% 89%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Caernarfon weather stats

Caernarfon weather statistics
Hottest month: July 17.9°C 64.2°F
Driest month: May 90mm 3.5ins
Sunniest month: May 6.9hrs
Coldest month: February 6.6°C 43.9°F
Wettest month: November 184mm 7.2ins
Warmest sea: August 15.3°C 59.5°F
Map showing location of Caernarfon (53.14126, -4.27016) Caernarfon map pin © Google

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