Isabela Weather & Climate: Best Time to Visit

Average temperatures, rainfall, sunshine and the best time to visit Isabela.

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Forecast Temperature Rainfall Sunshine

Climate overview of Isabela

Isabela, North Puerto Rico, Puerto Rico, enjoys a steady climate throughout the year, with daytime temperatures typically around 29°C (84°F). August is the warmest month at 31°C (88°F), while January is the coolest at 28°C (82°F).

The city has a wet climate, receiving around 1118 mm (44 in) of rainfall per year. September is the wettest month.

Isabela Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Isabela - and find the best time to visit.

January

28°C (82°F)View January → February

28°C (82°F)View February → March

28°C (82°F)View March → April

29°C (84°F)View April → May

29°C (84°F)View May → June

30°C (86°F)View June → July

31°C (88°F)View July → This monthAugust

31°C (88°F)View August → September

30°C (86°F)View September → October

30°C (86°F)View October → November

29°C (84°F)View November → December

28°C (82°F)View December →

Monthly Temperature in Isabela

The temperature in Isabela remains steady throughout the year, providing a consistently very warm climate. On average, daytime temperatures range from a very warm 31°C (88°F) in August to a comfortable 28°C (82°F) in January.

Nighttime temperatures range from 26°C (79°F) in August to 23°C (73°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

More Temperature details →

Rainfall in Isabela

Isabela has a relatively rainy climate with high precipitation levels, averaging 1118 mm (44 in) of rainfall annually. The seasons in Isabela bring significant changes in precipitation. The wettest month, September, receives high rainfall, with an average of 156 mm (6.1 in) of precipitation. This rainfall is distributed across 17 rainy days.

In contrast, the driest month, February, experiences much less rainfall, totaling 43 mm (1.7 in) over 14 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Isabela Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

More Rainfall details →

Best Time to Visit Isabela

For comfortable weather, consider visiting Isabela in January, February, March, April and December. Conditions are usually least favourable in June, August, September and October.

Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.

Jan excellent Feb excellent Mar excellent Apr excellent May very good Jun mixed Jul good Aug mixed Sep mixed Oct mixed Nov very good Dec excellent

Best overall: January, February, March, April and December
Warmest weather: May, June, July, August, September and October
Fewer rainy days: February, March, April, May and June

Frequently asked questions about the climate in Isabela

What is the best time to visit Isabela?

January, February, March, April and December typically offer the most optimal weather in Isabela. In contrast, June, August, September and October tend to have less optimal conditions.

What temperatures can I expect in Isabela?

Daytime highs range from 28°C (82°F) in January to 31°C (88°F) in August. Nighttime lows range from 23°C (73°F) to 26°C (79°F). Temperatures stay relatively stable year-round.