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 24.6 26.7 28.9 31.5 32.6 30.7 27.7 27.6 27.2 27.1 26.5 24.7
°F 76.3 80.1 84.1 88.7 90.6 87.2 81.8 81.6 81 80.8 79.7 76.5

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.

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 14 6 7 9 28 197 247 212 152 62 15 18
inches 0.6 0.2 0.3 0.4 1.1 7.7 9.7 8.4 6 2.4 0.6 0.7
Rainy days 2 1 1 1 3 14 19 17 15 8 2 3

Average annual rainfall in Arenal: 884mm (348 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 7.3 8.6 9 9.1 9.3 7.5 6.6 6.9 6.3 7.4 8 6.6

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 8.2 9.3 10.4 12.7 15 16.8 16.3 16.2 16.1 14 11.2 9.1
Max °C 25 27.2 29.4 32 33 31 28 27.9 27.5 27.5 26.9 25.1
Min °F 46.8 48.7 50.7 54.8 59 62.2 61.3 61.1 61 57.1 52.1 48.4
Max °F 61.9 64.8 67.8 72.1 75.2 75 71.8 71.6 71.2 69.3 66.2 62.8

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 25 24.4 24.3 25.1 26.8 28.4 29.4 29.8 29.6 29.3 28 26.2
°F 77 76 75.7 77.1 80.2 83.2 84.9 85.7 85.2 84.7 82.3 79.2

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 12 12 13 11 11 11 10 10 9 10 10 10
mph 7 8 8 7 7 7 7 6 6 6 6 7

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
59% 54% 50% 46% 50% 66% 75% 77% 77% 71% 64% 62%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Arenal weather stats

Arenal weather statistics
Hottest month: May 32.6°C 90.7°F
Driest month: February 6mm 0.2ins
Sunniest month: March 9hrs
Coldest month: January 24.6°C 76.3°F
Wettest month: July 247mm 9.7ins
Warmest sea: August 29.8°C 85.6°F
Map showing location of Arenal (20.77512, -103.69304) Arenal map pin © Google

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