Toa Baja, Puerto Rico Weather
First trades stir the ceiba canopy. Day 78 of spring. Read this microseason across nine climate regions →
Toa Baja weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 5Light Drizzle37%0.03″87°75°—
- SaturdayJun 6Thunderstorm51%0.03″87°76°0°
- SundayJun 7Light Drizzle63%0.03″88°75°+1°
- MondayJun 8Light Drizzle16%0.01″88°77°0°
- TuesdayJun 9Light Drizzle——86°76°-2°
- WednesdayJun 10Overcast——86°76°0°
- ThursdayJun 11Thunderstorm13%—86°76°0°
AQI 31 (Good), driven by PM2.5. AQI up 5 over the last 6 hours (gradual rise). PM2.5/PM10 ratio 0.54 with 6 mph wind — characteristic of long-range haze transport rather than a local source.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 4 PM.
What's driving it
PM × Wind × Precip
PM2.5/PM10 ratio 0.54 with 6 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.54
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- transport
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
- 2:39 AM
- Moonset
- 2:08 PM
- In sign
- ♒︎ Aquarius
First trades stir the ceiba canopy
Toa Baja at a glance
- Today vs. normal: 22°F below the seasonal normal for this latitude
- Last frost: December 8 (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
Toa Baja'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 |
Frequently asked
- When does it freeze in Toa Baja?
- Toa Baja's last spring frost typically falls around mid-February, and the first fall frost arrives around mid-December.
- What is the rainy season in Toa Baja?
- 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 Toa Baja?
- August is typically warmest, averaging about 85°F.
- What is the coldest month in Toa Baja?
- January is typically coldest, averaging about 69°F.
- When can I start a vegetable garden in Toa Baja?
- 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 Toa Baja get?
- Toa Baja averages about 184 rainy days per year.
- What hardiness zone is Toa Baja?
- Toa Baja'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
Toa Baja, Puerto Rico sits in a varied climate zone. January means hover near 69°F while July averages 84°F — a 15°F seasonal swing.
Across the year, Toa Baja receives about 57 inches of precipitation spread over roughly 184 rainy days.
The rhythm of the year is set by latitude (18.4°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.