Isabela Temperature by Month
Isabela in North Puerto Rico, Puerto Rico enjoys a stable climate, with daytime temperatures staying close to 29°C (84°F) throughout the year. Explore the full monthly breakdown below.
Isabela Monthly Temperatures
In Isabela temperatures are generally consistent throughout the year. Maximum daytime temperatures range from a comfortable 28°C (82°F) in February to a very warm 31°C (88°F) in August. Nighttime lows range from 26°C (79°F) in August to 23°C (73°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Isabela by month:
Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
49-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in June
Historical Isabela Temperatures: 1976-2026
Browse day-by-day temperature records for Isabela spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Isabela vs Puerto Rico
The map below shows the annual temperature across Puerto Rico. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Isabela vs World: Temperature Compared
Isabela's average annual maximum temperature is 29°C (84°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.
San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation — summers are often cool and foggy, winters mild.
Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate — hot dry summers and mild wet winters.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.
Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.
For more on Isabela's weather — including monthly rainfall, sunshine hours, and humidity — visit our Isabela climate page.
