Llanelli monthly weather averages

Contents

Average daytime temperature

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

Llanelli average temperature chart (Celsius) Llanelli average temperature chart (Fahrenheit)
Average monthly temperatures in Llanelli (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6.9 7 8.8 11.4 14.6 17.3 19.1 18.8 16.7 13.9 10 8.1
°F 44.5 44.6 47.8 52.6 58.2 63.2 66.4 65.8 62 56.9 50 46.5

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.

Llanelli monthly rainfall chart (mm) Llanelli monthly rainfall chart (inches)
Average monthly rainfall in Llanelli (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 158 104 114 84 88 91 88 117 130 157 157 164
inches 6.2 4.1 4.5 3.3 3.5 3.6 3.5 4.6 5.1 6.2 6.2 6.5
Rainy days 20 15 18 14 15 15 13 16 16 19 20 20

Average annual rainfall in Llanelli: 1500.167mm (590.6 inches)

Average daily sunshine

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

Llanelli average daily sunshine chart
Average daily sunshine Llanelli
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 1.9 2.9 3.9 5.9 6.9 6.9 6.6 6.2 4.8 3.4 2.6 1.8

Day / night temperatures

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

Llanelli average minimum / maximum temperatures (Celsius) Llanelli average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Llanelli (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 2.2 1.9 2.9 4.4 7.3 10.1 11.9 11.9 10.2 8 4.7 3
Max °C 7.1 7.1 9 11.6 14.8 17.5 19.3 19 16.9 14 10.2 8.2
Min °F 35.9 35.4 37.1 39.9 45.1 50.2 53.4 53.3 50.3 46.4 40.4 37.4
Max °F 40.3 40.1 42.6 46.4 51.8 56.8 60.1 59.7 56.3 51.8 45.3 42.1

Sea temperature

The graph below shows the average sea temperature.

Llanelli average sea temperature chart (Celsius) Llanelli average sea temperature chart (Fahrenheit)
Average sea temperature around Llanelli in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 9.7 8.8 8.6 9.4 11.1 13.3 15.3 16.2 15.9 14.6 12.8 11.2
°F 49.5 47.9 47.5 48.9 51.9 55.9 59.5 61.2 60.6 58.3 55.1 52.1

Wind speed

The graph below shows the average wind speed.

Llanelli average winspeed by month (km/h) Llanelli average winspeed by month (mph)
Average wind speed in Llanelli (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 23 22 21 19 18 17 16 17 19 20 22 23
mph 14 14 13 12 11 10 10 11 12 12 14 14

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.

Llanelli relative humidity averages
Average relative humidity in Llanelli
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
91% 88% 86% 83% 82% 84% 85% 86% 88% 89% 89% 91%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Llanelli weather stats

Llanelli weather statistics
Hottest month: July 19.1°C 66.4°F
Driest month: April 84mm 3.3ins
Sunniest month: May 6.9hrs
Coldest month: February 7°C 44.6°F
Wettest month: December 164mm 6.5ins
Warmest sea: August 16.2°C 61.2°F
Map showing location of Llanelli (51.68195, -4.16191) Llanelli map pin © Google

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