Guanica Weather in May
With daytime temperatures of 29°C (84°F) and nighttime lows of 24°C (75°F), May in Guanica brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 92 mm (3.6 in) falls on average.
Rainfall in Guanica in May
Historically, the month has about 15 days of rain, averaging 92 mm (3.6 in) in total. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Guanica in May
May is a good time to be in Guanica. Days are excellent, reaching 29°C (84°F), with nights around 24°C (75°F). This kind of day-to-night contrast is typical for this time of year. Nights stay warm at around 24°C (75°F), so light bedding and good ventilation are worth thinking about.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March, April, May, November and December typically offer the best weather for Guanica.
Guanica Temperature in May
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Guanica Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Guanica - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Guanica typically stay consistent throughout May, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 23°C (73°F).
Average temperatures in May
Historical weather records for Guanica in May
Browse day-by-day weather records for Guanica spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Guanica historical weather extremes in May
Based on 47 years of weather observations (1979-2026), these are the most extreme conditions recorded in Guanica.
- The hottest May day on record in Guanica reached 37°C (99°F) (May 18, 1997).
- The coldest May day was on May 20, 1979, with a maximum of 23°C (73°F).
- The lowest overnight temperature recorded in May was 19°C (66°F) (May 9, 1989).
Best Places in Puerto Rico in May
Find out more about the weather in Puerto Rico and which places have the best travel conditions in this month. See all of Puerto Rico in May →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Guanica in May
Warm but pleasant conditions in Guanica in May. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags.
What To Do in Guanica in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling7/10 -
Walking7/10 -
Camping8/10 -
Outdoor sports7/10
Guanica 3-Day Forecast
See the full Guanica climate overview or explore weather in Puerto Rico.
Popular in May
Where to go in May - average daytime high across popular destinations.
San Juan
30°C (86°F) Rio Grande29°C (84°F) Aguada
29°C (84°F) Luquillo29°C (84°F) Culebra28°C (82°F) Rincon29°C (84°F) Vieques
28°C (82°F) Fajardo29°C (84°F) 
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