Castlebar monthly weather averages

Average daytime temperature

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

Castlebar average temperature chart (Celsius) Castlebar average temperature chart (Fahrenheit)
Average monthly temperatures in Castlebar (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7.3 7.6 9.3 11.6 14.1 16.3 17.6 17.6 15.8 13 9.5 8
°F 45.1 45.6 48.7 52.9 57.3 61.3 63.7 63.7 60.4 55.4 49 46.4

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.

Castlebar monthly rainfall chart (mm) Castlebar monthly rainfall chart (inches)
Average monthly rainfall in Castlebar (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 129 83 98 66 79 70 68 94 111 131 134 130
inches 5.1 3.3 3.8 2.6 3.1 2.8 2.7 3.7 4.4 5.2 5.3 5.1
Rainy days 24 19 22 17 19 17 17 20 21 23 23 23

Average daily sunshine

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

Castlebar average daily sunshine chart
Average daily sunshine Castlebar
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 1.7 2.5 3.3 5.1 5.9 5.4 4.4 4.5 3.6 2.8 2.1 1.3

Day / night temperatures

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

Castlebar average minimum / maximum temperatures (Celsius) Castlebar average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Castlebar (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 1.8 1.7 2.8 3.8 6 8.6 10.4 10.2 8.7 6.9 3.6 2.9
Max °C 7.4 7.7 9.5 11.8 14.3 16.5 17.8 17.8 16 13.2 9.6 8.2
Min °F 35.2 35.1 37 38.8 42.7 47.4 50.7 50.4 47.6 44.3 38.5 37.1
Max °F 40.3 40.5 43 46 50.2 54.5 57.4 57.2 54.1 50 43.9 41.9

Sea temperature

The graph below shows the average sea temperature.

Castlebar average sea temperature chart (Celsius) Castlebar average sea temperature chart (Fahrenheit)
Average sea temperature around Castlebar in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 10.1 9.6 9.5 10 11.4 13.3 14.9 15.4 14.6 13.2 11.8 10.7
°F 50.1 49.3 49.1 50 52.4 55.9 58.8 59.7 58.2 55.7 53.2 51.3

Wind speed

The graph below shows the average wind speed.

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

Castlebar relative humidity averages
Average relative humidity in Castlebar
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
91% 87% 85% 83% 81% 83% 85% 86% 88% 89% 91% 92%

Other monthly averages

UV index Best time to go?

Castlebar weather stats

Castlebar weather statistics
Hottest month: July 17.6°C 63.7°F
Driest month: April 66mm 2.6ins
Sunniest month: May 5.9hrs
Coldest month: January 7.3°C 45.1°F
Wettest month: November 134mm 5.3ins
Warmest sea: August 15.4°C 59.7°F
Map showing location of Castlebar (53.85, -9.3)

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