Carolina, Puerto Rico Weather
First trades stir the ceiba canopy. Day 78 of spring. Read this microseason across nine climate regions →
Carolina weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Heavy Drizzle100%0.10″88°76°—
- FridayJun 5Light Drizzle74%0.06″89°75°+1°
- SaturdayJun 6Drizzle88%0.07″89°75°0°
- SundayJun 7Drizzle78%0.03″88°76°-1°
- MondayJun 8Overcast35%—89°77°+1°
- TuesdayJun 9Light Drizzle15%0.01″90°77°+1°
- WednesdayJun 10Overcast——88°75°-2°
AQI 30 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 11.4 µg/m³, PM10 at 24.0 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 8 AM.
What's driving it
PM × Wind × Precip
PM2.5 at 11.4 µg/m³, PM10 at 24.0 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.48
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
The higher the clouds, the finer the weather.
- Moonrise
- 2:38 AM
- Moonset
- 2:07 PM
- In sign
- ♒︎ Aquarius
First trades stir the ceiba canopy
Carolina at a glance
- Today vs. normal: 19°F below the seasonal normal for this latitude
- Last frost: December 7 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | lettuce, peas, spinach, radishes | — |
| March | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| April | tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | — | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
Carolina's warmest month is August (~85°F mean) and its coldest is January (~69°F). Rainfall peaks in September (8.2 inches) and bottoms out in February (2.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 69° | 2.1″ | 7 |
| February | 71° | 2.0″ | 7 |
| March | 73° | 2.2″ | 7 |
| April | 77° | 3.3″ | 11 |
| May | 80° | 4.8″ | 16 |
| June | 83° | 7.9″ | 25 |
| July | 84° | 5.8″ | 19 |
| August | 85° | 6.9″ | 23 |
| September | 83° | 8.2″ | 25 |
| October | 81° | 7.9″ | 25 |
| November | 76° | 3.3″ | 11 |
| December | 72° | 2.5″ | 8 |
Regional context
Carolina falls within a broader climate region where nearby cities share comparable temperature ranges, seasonal patterns, and growing conditions.
Similar climates: San Juan, PR, Aguadilla, PR, Bayamón, PR, Arecibo, PR, Ponce, PR.
Naturalist notes
By late May, flame trees (Delonix regia) send out their first scarlet blooms across the coastal lowlands, a reliable signal that the wet season is about to intensify.
Gray kingbirds return to open perches along roadsides and power lines in April and May, their sharp calls marking the onset of the summer breeding period.
Frequently asked
- When does it freeze in Carolina?
- Carolina's last spring frost typically falls around mid-February, and the first fall frost arrives around mid-December.
- What is the rainy season in Carolina?
- September is the wettest month with about 8.2 inches of rain on average; the city receives roughly 57 inches annually.
- What is the warmest month in Carolina?
- August is typically warmest, averaging about 85°F.
- What is the coldest month in Carolina?
- January is typically coldest, averaging about 69°F.
- When can I start a vegetable garden in Carolina?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-February); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Carolina get?
- Carolina averages about 184 rainy days per year.
- What hardiness zone is Carolina?
- Carolina's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Carolina, Puerto Rico occupies a varied climate zone. January temperatures hold near 69°F, while July averages 84°F — a 15°F seasonal swing.
Over the course of a year, Carolina picks up about 57 inches of precipitation spread across roughly 184 rainy days.
Latitude (18.4°N), nearby water bodies, and elevation set the yearly rhythm. Together they shape what grows, when frost is possible, and the day-to-day feel of the weather.