Stella, Puerto Rico experiences average highs of 29°C (84°F) and lows of 25°C (77°F) throughout the year. Rainfall is moderate, averaging about 11 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.
Stella, Puerto Rico Weather & Climate 2026
Monthly climate averages for Stella, 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
5.5/10
Best: January, February, March, December
UV Index
8
High
Temperature 29°C / 25°C
Feels Like 34°C / 28°C
Rainy Days 11
Rainfall 52 mm
Sunshine 11 h
Humidity 77%
Wind Speed 19 km/h
Dew Point 23°C
Hottest Month
31°C
July
Avg Low26°C
Rain15days
Coldest Month
24°C
February
Avg High28°C
Rain6days
Driest Month
4days
January
Avg High28°C
Avg Low24°C
Windiest Month
22 km/h
February (Gusts 31)
Sea Temperature
27°C – 31°C
Warmest water: September (
30.6°C
)
Worst Time to Visit
Consider avoiding July, August, September, October due to extreme heat, heavy rainfall, oppressive humidity.
Sun Position
Sunrise 05:54
Daylight 13.2h
Sunset 19:07
Live conditions—
Stella on the map · live conditions
Stella, Puerto Rico
- Continent
- Americas
- Country
- Puerto Rico
- City
- Stella
- Population
- 1.3K
- Elevation
- 2 m
- Coordinates
- 18.32°, -67.25°
Seasonal Breakdown
Spring
Mar–May
Avg High 29°C
Avg Low 24°C
Rain 11 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 31°C
Avg Low 26°C
Rain 14 days/mo
Autumn
Sep–Nov
Avg High 30°C
Avg Low 26°C
Rain 15 days/mo
Winter
Dec–Feb
Avg High 28°C
Avg Low 24°C
Rain 5 days/mo
3/3 best months
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 28°C / 24°C . Feb: 28°C / 24°C . Mar: 28°C / 24°C . Apr: 29°C / 24°C . May: 30°C / 25°C . Jun: 31°C / 26°C . Jul: 31°C / 26°C . Aug: 31°C / 27°C . Sep: 30°C / 27°C . Oct: 30°C / 26°C . Nov: 29°C / 25°C . Dec: 29°C / 25°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 16 mm. Feb: 21 mm. Mar: 29 mm. Apr: 42 mm. May: 57 mm. Jun: 43 mm. Jul: 58 mm. Aug: 75 mm. Sep: 123 mm. Oct: 73 mm. Nov: 73 mm. Dec: 16 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 74%. Feb: 74%. Mar: 74%. Apr: 75%. May: 77%. Jun: 76%. Jul: 77%. Aug: 78%. Sep: 79%. Oct: 79%. Nov: 79%. Dec: 76%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 21 km/h . Feb: 22 km/h . Mar: 21 km/h . Apr: 19 km/h . May: 18 km/h . Jun: 17 km/h . Jul: 19 km/h . Aug: 19 km/h . Sep: 19 km/h . Oct: 18 km/h . Nov: 18 km/h . Dec: 21 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 Temperatureswim
Line chart showing monthly sea temperature. Jan: 28°C . Feb: 27°C . Mar: 27°C . Apr: 28°C . May: 29°C . Jun: 30°C . Jul: 30°C . Aug: 30°C . Sep: 31°C . Oct: 30°C . Nov: 29°C . Dec: 28°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 7. Feb: UV 7. Mar: UV 8. Apr: UV 9. 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
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 31°C | Jul · 31°C |
| Coldest month | Feb 2025 · 24°C | Feb · 24°C |
| Wettest month | Sep 2025 · 125 mm | Sep · 123 mm |
| Windiest month | Jan 2025 · 23 km/h | Feb · 22 km/h |
Month-by-Month Weather Table
January best
Excellent 
February best
Excellent March best
Excellent April
Fair May
Fair June
Poor July
Poor August
Poor September
Poor October
Poor November
Fair December best
Excellent | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January best | 28°C / 24°C | 31°C / 25°C | 4days (16 mm) Good | 10.3h Excellent | 74% Muggy | 6.5 High | Excellent | View Details |
| February best | 28°C / 24°C | 31°C / 25°C | 6days (21 mm) Good | 10.6h Excellent | 74% Muggy | 7.3 Very High | Excellent | View Details |
| March best | 28°C / 24°C | 32°C / 25°C | 9days (29 mm) Wet | 11h Excellent | 74% Muggy | 8.2 Very High | Excellent | View Details |
| April | 29°C / 24°C | 34°C / 26°C | 12days (42 mm) Wet | 11.3h Excellent | 75% Muggy | 8.5 Very High | Fair | View Details |
| May | 30°C / 25°C | 35°C / 28°C | 13days (57 mm) Wet | 11.6h Excellent | 77% Humid | 8.3 Very High | Fair | View Details |
| June | 31°C / 26°C | 37°C / 30°C | 12days (43 mm) Wet | 12h Excellent | 76% Humid | 8.4 Very High | Poor | View Details |
| July | 31°C / 26°C | 37°C / 30°C | 15days (58 mm) Wet | 11.8h Excellent | 77% Humid | 8.3 Very High | Poor | View Details |
| August | 31°C / 27°C | 37°C / 30°C | 15days (75 mm) Wet | 11.1h Excellent | 78% Humid | 8.4 Very High | Poor | View Details |
| September | 30°C / 27°C | 37°C / 31°C | 17days (123 mm) Wet | 10.5h Excellent | 79% Humid | 8.3 Very High | Poor | View Details |
| October | 30°C / 26°C | 35°C / 30°C | 15days (73 mm) Wet | 10h Excellent | 79% Humid | 7.4 Very High | Poor | View Details |
| November | 29°C / 25°C | 34°C / 28°C | 12days (73 mm) Wet | 9.8h Good | 79% Humid | 6.6 High | Fair | View Details |
| December best | 29°C / 25°C | 32°C / 27°C | 4days (16 mm) Good | 10.2h Excellent | 76% Humid | 6.1 High | Excellent | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Stella are January, February, March, December, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Stella, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Stella is July, with average daytime highs of 31°C (87°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Stella is February, with average overnight lows of 24°C (74°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Stella is September, averaging 123mm of precipitation across 17 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Stella runs through September, July, August, October, with the heaviest rainfall in September. Based on 10-year averages for Stella.
Stella receives approximately 130 sunshine hours per year. The sunniest month is June with around 12 hours. Based on climate data for Stella.
The least favorable months to visit Stella are July, August, September, October, primarily due to extreme heat, heavy rainfall, oppressive humidity. For the best conditions, consider January, February, March, December instead.
The annual average UV index in Stella is 8, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Stella is 77%, 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 Stella are 19 km/h (12 mph). The windiest month is February with peak winds reaching 22 km/h (13 mph) (gusts up to 31 km/h / 20 mph).
Stella averages 6 clear-sky days per month with overall cloud cover around 44%. The clearest skies occur in December.
The annual average dew point in Stella is 23°C (73°F), which feels muggy and uncomfortable. Expect heavy perspiration during warmer months — stay hydrated and take breaks in air-conditioned spaces.
Stella has a Hot Semi-Arid climate, classified as BSh under the Köppen system. Arid climates have very low rainfall relative to temperature, with large swings between daytime heat and cool nights.
The 'feels like' temperature in Stella ranges from 28°C (82°F) to 34°C (93°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 Stella, with a climate score of 4.3/10. Consider visiting during January, February, March, December instead for better conditions.
For June in Stella, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 31°C (87°F) and 12 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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