Cayo Guillermo monthly weather averages

  • Average daytime temperature

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

    Cayo Guillermo average temperature chart
    Average monthly temperatures in Cayo Guillermo (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 26.8 27.7 28.9 30.3 31 31.8 32.7 32.8 32.1 30.5 29 27.6
    °F 80.3 81.9 84 86.5 87.8 89.2 90.8 91.1 89.8 87 84.2 81.7

    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.

    Average monthly rainfall in Cayo Guillermo (mm and inches)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    mm 45 43 52 59 166 154 82 111 156 183 87 40
    inches 1.8 1.7 2 2.3 6.6 6.1 3.2 4.4 6.2 7.2 3.4 1.6
    Rainy days 7 6 6 5 12 15 13 15 15 16 9 7
  • Average daily sunshine

    The bar chart below shows the average daily sunshine hours in Cayo Guillermo

    Average daily sunshine Cayo Guillermo
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Hrs sunshine 7.6 7.9 8.7 9.1 8.2 7.5 8.7 8.4 7.4 7.2 7.5 7.4
  • Day / night temperatures

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

    Maximum and minimum daily temperatures in Cayo Guillermo (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Min °C 17.2 17.6 18.4 19.2 21.1 22.7 23.2 23.2 22.6 22 20.5 18.5
    Max °C 27.1 28 29.1 30.5 31.2 32 32.9 33.1 32.4 30.8 29.2 27.9
    Min °F 63 63.6 65.1 66.5 69.9 72.9 73.8 73.7 72.6 71.5 68.9 65.2
    Max °F 71.9 73 74.8 76.7 79.1 81.2 82.5 82.6 81.4 79.4 76.7 73.7
  • Sea temperature

    The graph below shows the average sea temperature.

    Average sea temperature around Cayo Guillermo in degrees centigrade and fahrenheit
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 25.1 25 25.4 26.3 27.4 28.7 29.3 29.7 29.6 28.8 27.1 25.9
    °F 77.2 77 77.7 79.3 81.3 83.7 84.8 85.4 85.3 83.8 80.8 78.6
  • Wind speed

    The graph below shows the average wind speed.

    Average wind speed in Cayo Guillermo (mph and kmh)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    km/h 14 14 15 14 12 11 12 12 10 11 13 13
    mph 8 9 9 9 8 7 8 7 6 7 8 8

    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.

    Average relative humidity in Cayo Guillermo
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    81% 79% 78% 75% 79% 81% 79% 80% 83% 84% 84% 83%
Cayo Guillermo

Other monthly averages

Cayo Guillermo weather stats

Cayo Guillermo weather statistics
Hottest month: August 32.8°C 91°F
Driest month: December 40mm 1.6ins
Sunniest month: March 8.7hrs
Coldest month: January 26.8°C 80.2°F
Wettest month: October 183mm 7.2ins
Warmest sea: August 29.7°C 85.5°F
Map showing location of Cayo Guillermo (22.595, -78.66639)

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