Dundalk monthly weather averages

Average daytime temperature

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

Dundalk average temperature chart (Celsius) Dundalk average temperature chart (Fahrenheit)
Average monthly temperatures in Dundalk (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7.5 7.6 9.6 12 14.7 17.7 19.3 18.8 16.7 13.6 9.7 8.1
°F 45.4 45.6 49.3 53.5 58.5 63.9 66.7 65.8 62.1 56.6 49.4 46.6

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.

Dundalk monthly rainfall chart (mm) Dundalk monthly rainfall chart (inches)
Average monthly rainfall in Dundalk (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 87 61 66 59 63 61 55 72 79 81 77 87
inches 3.4 2.4 2.6 2.3 2.5 2.4 2.2 2.8 3.1 3.2 3 3.4
Rainy days 19 15 17 15 16 15 15 17 16 18 17 18

Average daily sunshine

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

Dundalk average daily sunshine chart
Average daily sunshine Dundalk
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 1.9 2.7 3.7 5.3 6.3 6.1 5.4 5.1 4.3 3.3 2.5 1.7

Day / night temperatures

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

Dundalk average minimum / maximum temperatures (Celsius) Dundalk average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Dundalk (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 2 1.9 2.8 4.1 6.5 9.3 11.2 10.9 9.3 7.2 3.6 2.8
Max °C 7.6 7.7 9.8 12.2 15 17.9 19.5 19 16.9 13.8 9.8 8.3
Min °F 35.6 35.4 37 39.3 43.6 48.7 52.1 51.5 48.7 45 38.5 37
Max °F 40.6 40.6 43.3 46.6 51.3 56.5 59.5 58.8 55.6 50.9 44.1 41.9

Sea temperature

The graph below shows the average sea temperature.

Dundalk average sea temperature chart (Celsius) Dundalk average sea temperature chart (Fahrenheit)
Average sea temperature around Dundalk in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.7 7.8 7.6 8.5 10.2 12.3 14.1 14.9 14.6 13.5 11.9 10.2
°F 47.6 46 45.7 47.2 50.3 54.2 57.4 58.9 58.3 56.4 53.5 50.4

Wind speed

The graph below shows the average wind speed.

Dundalk average winspeed by month (km/h) Dundalk average winspeed by month (mph)
Average wind speed in Dundalk (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 22 21 21 18 17 16 16 15 17 19 20 21
mph 14 13 13 11 10 10 10 9 11 12 12 13

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.

Dundalk relative humidity averages
Average relative humidity in Dundalk
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
89% 85% 83% 81% 80% 80% 81% 83% 85% 87% 89% 89%

Other monthly averages

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Dundalk weather stats

Dundalk weather statistics
Hottest month: July 19.3°C 66.7°F
Driest month: July 55mm 2.2ins
Sunniest month: May 6.3hrs
Coldest month: January 7.5°C 45.5°F
Wettest month: December 87mm 3.4ins
Warmest sea: August 14.9°C 58.8°F
Map showing location of Dundalk (54, -6.41667)

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