Bayamón, Puerto Rico Weather
First trades stir the ceiba canopy. Day 77 of spring. Read this microseason across nine climate regions →
Bayamón weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Light Showers100%0.16″89°74°—
- FridayJun 5Light Drizzle74%0.01″90°74°+1°
- SaturdayJun 6Heavy Drizzle88%0.04″89°75°-1°
- SundayJun 7Drizzle78%0.04″88°75°-1°
- MondayJun 8Light Drizzle35%0.01″90°76°+2°
- TuesdayJun 9Light Drizzle15%0.02″88°75°-2°
- WednesdayJun 10Overcast——87°75°-1°
PM scrubbed by 3 hours of recent rain — PM2.5 down to 15.3 µg/m³, PM10 to 32.2 µg/m³. AQI flat over the last 6 hours (within ±3 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM scrubbed by 3 hours of recent rain — PM2.5 down to 15.3 µg/m³, PM10 to 32.2 µg/m³.
- PM2.5/PM10
- 0.48
- Wind
- light
- Recent rain
- 3h in last 6h
- Pattern
- washed out
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 1:56 AM
- Moonset
- 1:14 PM
- In sign
- ♒︎ Aquarius
First trades stir the ceiba canopy
Bayamón at a glance
- Today vs. normal: 14°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 4, 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
August brings Bayamón's peak heat with mean temperatures around 85°F, while January delivers the year's coolest weather at roughly 69°F. September marks the wettest period with 8.2 inches of rainfall, contrasting sharply with February's dry spell of just 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
Climate conditions in Bayamón align with a broader regional pattern, sharing temperature ranges and seasonal characteristics with surrounding cities that experience similar growing conditions.
Similar climates: San Juan, PR, Aguadilla, PR, Carolina, PR, Arecibo, PR, Ponce, PR.
Naturalist notes
May brings the peak migration of warblers through Puerto Rico, with species like the Black-throated Blue Warbler passing through on their journey north.
Flamboyán trees begin their spectacular flowering display in late May, painting the landscape with brilliant orange-red blooms.
Frequently asked
- When does it freeze in Bayamón?
- Spring's final frost in Bayamón typically occurs around mid-February, while the first fall frost returns around mid-December.
- What is the rainy season in Bayamón?
- September stands as the wettest month, delivering approximately 8.2 inches of rain, contributing to the city's annual total of roughly 57 inches.
- What is the warmest month in Bayamón?
- August typically records the year's highest temperatures, with averages reaching about 85°F.
- What is the coldest month in Bayamón?
- January typically brings the coolest weather, with temperatures averaging about 69°F.
- When can I start a vegetable garden in Bayamón?
- Cool-season vegetables like peas and lettuce can be planted around the last spring frost in mid-February, while warm-season crops such as tomatoes and peppers should wait 1–2 weeks after that date.
- How many rainy days does Bayamón get?
- Bayamón experiences approximately 184 rainy days annually.
- What hardiness zone is Bayamón?
- Bayamón's USDA hardiness zone depends on average minimum winter temperatures; consult the USDA's online zone finder using the city ZIP code for current designation.
Climate
Bayamón, Puerto Rico experiences a climate with distinct seasonal variation. Temperatures hover near 69°F in January and climb to an average of 84°F in July, creating a 15°F seasonal swing.
Annual precipitation totals about 57 inches, distributed across roughly 184 rainy days throughout the year.
Geographic factors shape the local weather patterns: latitude at 18.4°N, nearby water bodies, and elevation all influence plant growth cycles, frost likelihood, and daily weather conditions.