Carolina, Puerto Rico Weather
Storm intensity ebbs slightly. Day 93 of summer. Read this microseason across nine climate regions →
Carolina weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 1:30 AM AST · Open-Meteo
- TodaySep 21Drizzle later86%0.07″90°76°—
- TuesdaySep 22Clear90%0.07″90°75°0°
- WednesdaySep 23Drizzle62%0.07″90°74°0°
- ThursdaySep 24Drizzle80%0.04″89°76°-1°
- FridaySep 25Light Drizzle47%0.01″90°75°+1°
- SaturdaySep 26Light Drizzle60%0.02″92°76°+2°
- SundaySep 27Light Drizzle78%0.02″93°79°+1°
Air quality now AQI 17 · Good
AQI 17 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 5.7 µg/m³ (AQI 32) with a 0.84 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in stagnant air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 5.7 µg/m³ (AQI 32) with a 0.84 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.84
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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).
September dries up ditches or breaks down bridges.
- Moonrise
- 3:05 PM
- Moonset
- 1:36 AM
- In sign
- ♑︎ Capricorn
Storm intensity ebbs slightly
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Carolina at a glance
- Today vs. normal: Today averages 83°F (high 90°F, low 76°F), about the 83°F normal for Sep 21
- Last frost: None — no 32°F night in 1991–2020 (NOAA station 3 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant tomatoes, peppers, beans, squash; harvest summer squash, winter squash
15-Day Forecast — Carolina
- Mon90°76°86%
- Tue90°75°90%
- Wed90°74°62%
- Thu89°76°80%
- Fri90°75°47%
- Sat92°76°60%
- Sun93°79°78%
- Mon89°77°68%
- Tue91°78°76%
- Wed88°78°74%
- Thu87°77°76%
- Fri90°77°59%
- Sat89°76°73%
- Sun87°76°59%
- Mon90°75°43%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Carolina
Interactive wind and temperature map centered on Carolina — it loads in your browser. Open the full weather map.
Right now in the garden
Year-round growing
As of September 21, sowing here runs through the year. Freezes are uncommon, so there is no frost date to plan around; heat and rainfall set the calendar instead. This city's planting calendar for September: plant tomatoes, peppers, beans, and squash; harvest summer squash and winter squash.
Sun & seasons in Carolina
Carolina sits in Carolina County, where the year’s longest day runs 13h 14m of daylight and its shortest just 11h 1m — a swing of +2h 13m between the June and December solstices.
San Juan, the state’s largest city, lies about 5 miles to the W. The nearest town Carolina tracks is San Juan, roughly 5 miles to the W.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| February | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| March | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| April | squash | tomatoes, peppers, beans, summer squash, winter squash |
| May | squash | tomatoes, peppers, beans, summer squash, winter squash |
| June | squash | tomatoes, summer squash, winter squash |
| July | squash | summer squash, winter squash |
| August | tomatoes, peppers, squash | summer squash, winter squash |
| September | tomatoes, peppers, beans, squash | summer squash, winter squash |
| October | tomatoes, peppers, beans, squash | summer squash, winter squash |
| November | tomatoes, peppers, beans, squash | beans, summer squash, winter squash |
| December | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
A year in weather
The year in Carolina tops out in August (~84°F) and dips lowest in January (~78°F), with November wettest at 7.4 inches and March driest at 2.2 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 78° | 4.1″ | 18 |
| February | 78° | 2.6″ | 15 |
| March | 79° | 2.2″ | 13 |
| April | 80° | 4.6″ | 14 |
| May | 82° | 5.5″ | 17 |
| June | 83° | 4.7″ | 15 |
| July | 83° | 6.0″ | 19 |
| August | 84° | 6.3″ | 20 |
| September | 83° | 6.5″ | 18 |
| October | 83° | 5.2″ | 18 |
| November | 81° | 7.4″ | 21 |
| December | 79° | 4.8″ | 20 |
Regional context
Similar climates Trujillo Alto, PR, Santa Bárbara, PR, Caño Martin Peña, PR
Carolina's climate, from NOAA NCEI 1991-2020 station normals, pairs 78°F Januarys with 83°F Julys — a 6°F swing. About 59.9 inches of precipitation falls over roughly 208 days a year.
Carolina's precipitation spreads evenly across the seasons: November peaks at 7.4 inches on 20.6 wet days, while March holds 2.2 inches over 13.1 — no season dominates Carolina's rain calendar. That even rhythm groups Carolina with places like Trujillo Alto, PR, Santa Bárbara, PR and Caño Martin Peña, PR.
Carolina rarely sees a hard freeze — its coldest month sits near 78°F — so planting spans most of the calendar. Heat peaks in August around 84°F, which confines cool-season crops to the shoulders of summer. Carolina's rare cold nights chill open ground first.
Similar climates: Trujillo Alto, PR, Santa Bárbara, PR, Caño Martin Peña, PR, San Juan, PR, Valle Hill, PR.
Frequently asked
- When does it freeze in Carolina?
- In Carolina, a freeze is absent from the record: the nearest NOAA station never dropped to 32°F in 1991–2020, and Carolina's coldest month runs 78°F.
- What is the rainy season in Carolina?
- Rainfall in Carolina peaks in November near 7.4 inches, out of about 60 inches annually.
- What is the warmest month in Carolina?
- Carolina peaks in August, when the mean runs near 84°F.
- What is the coldest month in Carolina?
- January is Carolina's coldest month, averaging about 78°F.
- When can I start a vegetable garden in Carolina?
- Any season works in Carolina: without a reliable freeze, Carolina's heat, not frost, decides when greens and tomatoes do best.
- How many rainy days does Carolina get?
- Carolina averages about 208 days with measurable rain or snow each year.
- What hardiness zone is Carolina?
- With January around 78°F, Carolina's zone reflects that minimum — the USDA ZIP map confirms Carolina's band.
- What is the 10-day forecast for Carolina?
- Carolina's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Carolina?
- See this week's day-by-day rain chances for Carolina in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Carolina?
- Current conditions for Carolina and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Carolina forecast updated?
- The Carolina forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Carolina?
- Today's sunrise and sunset times for Carolina are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Carolina?
- The next few days in Carolina's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
ZIP codes in Carolina
- 00979
- 00981
- 00982
- 00983
- 00984
- 00985
- 00986
- 00987
- 00988