Arenal monthly weather averages

Contents

Average daytime temperature

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

Arenal average temperature chart (Celsius) Arenal average temperature chart (Fahrenheit)
Average monthly temperatures in Arenal (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 26.1 27.2 29 30.1 30.7 30 29.6 29.9 29.8 28.7 27.3 26.7
°F 79 81 84.2 86.1 87.3 86.1 85.3 85.8 85.7 83.6 81.2 80.1

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.

Arenal monthly rainfall chart (mm) Arenal monthly rainfall chart (inches)
Average monthly rainfall in Arenal (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 60 40 27 27 76 152 119 97 134 139 126 88
inches 2.4 1.6 1 1.1 3 6 4.7 3.8 5.3 5.5 5 3.5
Rainy days 15 11 8 6 10 16 19 20 19 20 18 16

Average annual rainfall in Arenal: 1013.167mm (398.9 inches)

Average daily sunshine

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

Arenal average daily sunshine chart
Average daily sunshine Arenal
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 8.4 8.8 10.2 10.9 10.5 8.2 8.3 7.9 8 6.9 6.9 7.6

Day / night temperatures

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

Arenal average minimum / maximum temperatures (Celsius) Arenal average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Arenal (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 17.5 17.6 18.8 19.9 21.1 21.4 20.8 20.9 21 20.1 19.1 18.3
Max °C 26.4 27.5 29.3 30.3 31 30.3 29.8 30.1 30.1 28.9 27.6 27
Min °F 63.4 63.6 65.8 67.8 69.9 70.4 69.4 69.6 69.7 68.2 66.3 64.9
Max °F 71.4 72.5 75.2 77.2 78.8 78.4 77.5 77.9 77.9 76.1 73.9 72.7

Sea temperature

The graph below shows the average sea temperature.

Arenal average sea temperature chart (Celsius) Arenal average sea temperature chart (Fahrenheit)
Average sea temperature around Arenal in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 26.9 26.8 27.1 27.8 28.4 28.9 28.8 29.2 29.4 29.2 28.3 27.5
°F 80.5 80.3 80.8 82 83.2 83.9 83.9 84.5 85 84.5 82.9 81.4

Wind speed

The graph below shows the average wind speed.

Arenal average winspeed by month (km/h) Arenal average winspeed by month (mph)
Average wind speed in Arenal (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 21 22 25 25 23 23 25 23 20 19 19 20
mph 13 14 15 15 14 15 16 14 13 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.

Arenal relative humidity averages
Average relative humidity in Arenal
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
69% 67% 58% 55% 62% 78% 77% 77% 76% 81% 79% 74%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Arenal weather stats

Arenal weather statistics
Hottest month: May 30.7°C 87.3°F
Driest month: March 27mm 1.1ins
Sunniest month: April 10.9hrs
Coldest month: January 26.1°C 79°F
Wettest month: June 152mm 6ins
Warmest sea: September 29.4°C 84.9°F
Map showing location of Arenal (15.35, -86.83333) Arenal map pin © Google

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