Juncal, Puerto Rico experiences average highs of 29°C (84°F) and lows of 22°C (72°F) throughout the year. Rainfall is frequent, averaging about 15 rainy days per month. Sunshine is abundant, averaging about 11 hours per day. High humidity combined with warm temperatures produces a tropical feel year-round. Average highs have stayed broadly stable across the available records.
Juncal, Puerto Rico Weather & Climate 2026
Monthly climate averages for Juncal, Puerto Rico. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: May–Oct At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
6.5/10
Best: January, February, December
UV Index
8
High
Temperature 29°C / 22°C
Feels Like 33°C / 25°C
Rainy Days 15
Rainfall 84 mm
Sunshine 11 h
Humidity 79%
Wind Speed 14 km/h
Dew Point 21°C
Hottest Month
30°C
July
Avg Low 24°C
Rain 19 days
Coldest Month
20°C
February
Avg High 28°C
Rain 8 days
Driest Month
6 days
January
Avg High 28°C
Avg Low 20°C
Windiest Month
17 km/h
February (Gusts 38)
Sea Temperature
27°C – 31°C
Warmest water: September (
31.2°C
)
Worst Time to Visit
Consider avoiding June, July, August, September due to heavy rainfall, oppressive humidity.
Sun Position
Sunrise 05:52
Daylight 13.2h
Sunset 19:05
Live conditions —
Juncal on the map · live conditions
Juncal, Puerto Rico
- Continent
- Americas
- Country
- Puerto Rico
- City
- Juncal
- Population
- 1.2K
- Elevation
- 353 m
- Coordinates
- 18.31°, -66.92°
Seasonal Breakdown
Spring
Mar–May
Avg High 28°C
Avg Low 21°C
Rain 16 days/mo
Summer
Jun–Aug
Avg High 30°C
Avg Low 24°C
Rain 18 days/mo
Autumn
Sep–Nov
Avg High 29°C
Avg Low 23°C
Rain 20 days/mo
Winter
Dec–Feb
Avg High 28°C
Avg Low 21°C
Rain 7 days/mo
3/3 best months
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
High Low Shaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 28°C / 20°C . Feb: 28°C / 20°C . Mar: 28°C / 20°C . Apr: 28°C / 21°C . May: 29°C / 22°C . Jun: 30°C / 23°C . Jul: 30°C / 24°C . Aug: 30°C / 24°C . Sep: 30°C / 24°C . Oct: 29°C / 23°C . Nov: 28°C / 22°C . Dec: 28°C / 21°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 19 mm. Feb: 38 mm. Mar: 52 mm. Apr: 90 mm. May: 115 mm. Jun: 74 mm. Jul: 90 mm. Aug: 115 mm. Sep: 171 mm. Oct: 125 mm. Nov: 100 mm. Dec: 24 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 76%. Feb: 75%. Mar: 75%. Apr: 77%. May: 79%. Jun: 78%. Jul: 78%. Aug: 80%. Sep: 84%. Oct: 85%. Nov: 84%. Dec: 79%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 15 km/h . Feb: 17 km/h . Mar: 15 km/h . Apr: 14 km/h . May: 13 km/h . Jun: 14 km/h . Jul: 16 km/h . Aug: 15 km/h . Sep: 14 km/h . Oct: 12 km/h . Nov: 13 km/h . Dec: 15 km/h .
Sunshine
Sunshine
Sunshine: Jan: 10h. Feb: 11h. Mar: 11h. Apr: 11h. May: 12h. Jun: 12h. Jul: 12h. Aug: 11h. Sep: 11h. Oct: 10h. Nov: 10h. Dec: 10h.
Sea Temperature
Sea Temperature swim
Line chart showing monthly sea temperature. Jan: 27°C . Feb: 27°C . Mar: 28°C . Apr: 29°C . May: 30°C . Jun: 30°C . Jul: 31°C . Aug: 31°C . Sep: 31°C . Oct: 31°C . Nov: 29°C . Dec: 28°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 6. Feb: UV 7. Mar: UV 8. Apr: UV 8. May: UV 8. Jun: UV 8. Jul: UV 8. Aug: UV 8. Sep: UV 8. Oct: UV 7. Nov: UV 7. Dec: UV 6.
Monthly Daylight Hours
Daylight 12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 10 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 31°C | Jul · 30°C |
| Coldest month | Mar 2025 · 21°C | Feb · 20°C |
| Wettest month | May 2025 · 187 mm | Sep · 171 mm |
| Windiest month | Feb 2025 · 17 km/h | Feb · 17 km/h |
Month-by-Month Weather Table
January best
Excellent 
February best
Excellent March
Good April
Good May
Wet June
Fair July
Wet August
Wet September
Wet October
Wet November
Good December best
Excellent | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January best | 28°C / 20°C | 29°C / 22°C | 6days (19 mm) Good | 10.4h Excellent | 76% Humid | 6.4 High | Excellent | View Details |
| February best | 28°C / 20°C | 30°C / 22°C | 8days (38 mm) Wet | 10.7h Excellent | 75% Muggy | 7.3 Very High | Excellent | View Details |
| March | 28°C / 20°C | 31°C / 22°C | 12days (52 mm) Wet | 11h Excellent | 75% Muggy | 8.3 Very High | Good | View Details |
| April | 28°C / 21°C | 32°C / 23°C | 17days (90 mm) Wet | 11.3h Excellent | 77% Humid | 8.4 Very High | Good | View Details |
| May | 29°C / 22°C | 34°C / 25°C | 19days (115 mm) Wet | 11.6h Excellent | 79% Humid | 8.4 Very High | Wet | View Details |
| June | 30°C / 23°C | 35°C / 27°C | 17days (74 mm) Wet | 12h Excellent | 78% Humid | 8.3 Very High | Fair | View Details |
| July | 30°C / 24°C | 35°C / 27°C | 19days (90 mm) Wet | 11.8h Excellent | 78% Humid | 8.3 Very High | Wet | View Details |
| August | 30°C / 24°C | 35°C / 27°C | 19days (115 mm) Wet | 11.1h Excellent | 80% Humid | 8.4 Very High | Wet | View Details |
| September | 30°C / 24°C | 35°C / 27°C | 23days (171 mm) Wet | 10.5h Excellent | 84% Humid | 8.3 Very High | Wet | View Details |
| October | 29°C / 23°C | 34°C / 27°C | 20days (125 mm) Wet | 10h Excellent | 85% Humid | 7.4 Very High | Wet | View Details |
| November | 28°C / 22°C | 32°C / 25°C | 16days (100 mm) Wet | 9.8h Good | 84% Humid | 6.6 High | Good | View Details |
| December best | 28°C / 21°C | 30°C / 23°C | 8days (24 mm) Wet | 10.2h Excellent | 79% Humid | 6.1 High | Excellent | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Juncal are January, February, December, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Juncal, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Juncal is July, with average daytime highs of 30°C (87°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Juncal is February, with average overnight lows of 20°C (68°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Juncal is September, averaging 171mm of precipitation across 23 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Juncal runs through September, October, May, July, with the heaviest rainfall in September. Based on 10-year averages for Juncal.
Juncal receives approximately 130 sunshine hours per year. The sunniest month is June with around 12 hours. Based on climate data for Juncal.
The least favorable months to visit Juncal are June, July, August, September, primarily due to heavy rainfall, oppressive humidity. For the best conditions, consider January, February, December instead.
The annual average UV index in Juncal is 8, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Juncal is 79%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes — sea temperatures in January, February, March, April, May, June, July, August, September, October, November, December average 29°C (84°F), which is warm and comfortable for swimming and water activities.
Average wind speeds in Juncal are 14 km/h (9 mph). The windiest month is February with peak winds reaching 17 km/h (10 mph) (gusts up to 38 km/h / 23 mph).
Juncal averages 2 clear-sky days per month with overall cloud cover around 49%. The clearest skies occur in December.
The annual average dew point in Juncal is 21°C (70°F), which feels muggy and uncomfortable. Expect heavy perspiration during warmer months — stay hydrated and take breaks in air-conditioned spaces.
Juncal has a Tropical Monsoon climate, classified as Am under the Köppen system. Tropical climates are warm year-round with high rainfall and temperatures rarely dropping below 18°C (64°F).
The 'feels like' temperature in Juncal ranges from 25°C (77°F) to 33°C (91°F) on average. Humidity and radiant heat mean it often feels warmer than the thermometer reads, especially in summer months.
June is not the best time to visit Juncal, with a climate score of 4.8/10. Consider visiting during January, February, December instead for better conditions.
For June in Juncal, pack Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). With average highs of 30°C (86°F) and 17 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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