Guanica Temperature by Month
The average annual maximum temperature in Guanica, Puerto Rico is 29°C (84°F), with little variation between seasons. This page covers monthly averages, day-night differences, and how Guanica compares to cities worldwide.
Guanica Monthly Temperatures
The temperature in Guanica changes very little across the seasons, maintaining a similar climate 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 July. Nighttime lows range from 25°C (77°F) in July to 22°C (72°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Guanica by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak.
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 Guanica Temperatures: 1976-2026
Browse day-by-day temperature records for Guanica spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Guanica 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
Guanica vs World: Temperature Compared
Guanica'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:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.
New York City, USA averages 17°C (63°F) a year, with hot humid summers and cold winters that bring regular snowfall.
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.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Guanica this rarely lasts long on the ground.
For more on Guanica's weather — including monthly rainfall, sunshine hours, and humidity — visit our Guanica climate page.
