Isabela monthly weather averages

Average daytime temperature

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

Isabela average temperature chart (Celsius) Isabela average temperature chart (Fahrenheit)
Average monthly temperatures in Isabela (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 26.1 26.1 26.7 27.4 28.3 28.9 29 29.1 29.2 29 27.9 26.7
°F 78.9 78.9 80 81.3 82.9 83.9 84.2 84.4 84.5 84.1 82.2 80

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.

Isabela monthly rainfall chart (mm) Isabela monthly rainfall chart (inches)
Average monthly rainfall in Isabela (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 89 76 86 145 254 199 150 198 213 201 152 104
inches 3.5 3 3.4 5.7 10 7.8 5.9 7.8 8.4 7.9 6 4.1
Rainy days 19 14 14 13 15 16 18 19 17 18 18 20

Average daily sunshine

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

Isabela average daily sunshine chart
Average daily sunshine Isabela
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 8.5 8.9 9.5 9.3 8.6 9 9.3 9.2 8.4 8 7.7 7.7

Day / night temperatures

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

Isabela average minimum / maximum temperatures (Celsius) Isabela average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Isabela (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 19.5 19.2 19.7 20.3 21.3 22 22.5 22.5 22.2 21.8 21.3 20.3
Max °C 26.2 26.3 26.8 27.6 28.5 29 29.2 29.3 29.3 29.1 28 26.8
Min °F 67.1 66.5 67.4 68.6 70.3 71.6 72.5 72.5 71.9 71.2 70.3 68.5
Max °F 73.1 72.9 73.9 75.1 76.7 77.9 78.5 78.6 78.4 77.8 76.4 74.4

Sea temperature

The graph below shows the average sea temperature.

Isabela average sea temperature chart (Celsius) Isabela average sea temperature chart (Fahrenheit)
Average sea temperature around Isabela in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 26.6 26.3 26.3 26.8 27.5 28.1 28.4 28.7 29 28.9 28.3 27.4
°F 80 79.3 79.3 80.2 81.5 82.6 83 83.7 84.2 84 82.9 81.3

Wind speed

The graph below shows the average wind speed.

Isabela average winspeed by month (km/h) Isabela average winspeed by month (mph)
Average wind speed in Isabela (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 16 17 16 16 15 15 17 16 14 13 15 16
mph 10 11 10 10 9 10 11 10 9 8 9 10

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.

Isabela relative humidity averages
Average relative humidity in Isabela
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
79% 77% 76% 76% 79% 79% 79% 79% 80% 80% 79% 79%

Other monthly averages

UV index Best time to go?

Isabela weather stats

Isabela weather statistics
Hottest month: August 29.1°C 84.4°F
Driest month: February 76mm 3ins
Sunniest month: March 9.5hrs
Coldest month: February 26.1°C 79°F
Wettest month: May 254mm 10ins
Warmest sea: September 29°C 84.2°F
Map showing location of Isabela (18.50078, -67.02435)

Locations nearby

Top Puerto Rico locations

Change units