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Toa Alta, Puerto Rico Weather

Reef polyps synchronize in moonlight. Day 90 of spring. Read this microseason across nine climate regions →

Toa Alta weather forecast — hour by hour, 7-day outlook, NOAA radar

Toa Alta, PR
Tuesday, June 16 at 9:15 PM
77
°
Partly Cloudy
Feels like
83°
Humidity
79%
Wind
5 mph
Sunrise
1:48 AM
Sunset
3:02 PM
Toa Alta, PR
Hour by hour · 24h
24-Hour ForecastToa Alta, PR: 24-hour forecast. Temperatures range from 73 to 90 degrees Fahrenheit with a 51% chance of precipitation at 4 PM.
L 73°H 90°
Toa Alta, PR
7-day forecast
  1. Today
    Jun 16
    Light Drizzle
    35%
    0.02″
    89°74°—
  2. Wednesday
    Jun 17
    Overcast
    51%
    —
    90°73°+1°
  3. Thursday
    Jun 18
    Thunderstorm
    77%
    0.06″
    89°73°-1°
  4. Friday
    Jun 19
    Thunderstorm
    54%
    0.01″
    89°74°0°
  5. Saturday
    Jun 20
    Thunderstorm
    16%
    —
    88°74°-1°
  6. Sunday
    Jun 21
    Thunderstorm
    100%
    0.07″
    88°74°0°
  7. Monday
    Jun 22
    Thunderstorm
    35%
    0.06″
    90°75°+2°
Toa Alta, PR
Next 24 hours · Mild now
HOT 90°68°81°94°6p12a6a12pnow 77°high 90°low 73°PRECIP %
Toa Alta, PR
Anemometer · 24h winds · from true
NESW
From · True
ESE
110° · veering 7°
Direction
ESE
110°
Sustained
5
mph
Gust
11
mph
Peak 24h
25
avg 6
Beaufort · 2 · LIGHT BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 6 · pk 25 @ 3:00p
0102030MPHB1B2B3B4B5B6-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 237SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 7° from the ese.
Toa Alta, PR
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1014.7
+1.4 mb in 3h · rising · 29.96 inHg
Now
1014.7
mb
3h
+1.4
mb
12h
-0.6
mb
24h
-1.3
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1013–1016
9951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY-21h-18h-15h-12h-9h-6h-3h-24hNOW1016.11012.91014.6
−24h−18h−12h−6hnow
Pressure climbing through the change line — drier air pushing in.
Toa Alta, PR
Air quality
22
AQI
Good
→-1 in 6h

AQI 22 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 4.5 µg/m³ (AQI 25) with a 0.63 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5DRIVERGood
4.5μg/m³
PM 10Good
7μg/m³
NO₂Good
1μg/m³
OzoneGood
39μg/m³
UV IndexLow
0.0

What's driving it

PM × Wind × Precip

PM2.5 at 4.5 µg/m³ (AQI 25) with a 0.63 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.63
Wind
light
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).

7-DAY AQI TREND50100WEDTHUFRISATSUNMONTUEWED7-DAY PM2.5 TREND · μg/m³300
Toa Alta, PR
Sky cover · visibility · 24h
Cloud cover
76%
MOSTLY CLOUDY
100%0%−24h−18h−12h−6hnow
Visibility
73.0mi
UNLIMITED
89 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
01:15 UTC · Toa Alta, PR · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
01:15 UTC · Toa Alta, PR · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Toa Alta, PR
Satellite · infrared · animated
Toa Alta, PR
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Toa Alta, PR
Almanac · Tuesday, June 16
A summer fog for fair, a winter fog for rain.
Civil dawn
5:25 AM
Sunrise
1:48 AM
Daylight
13h 14m
Sunset
3:02 PM
Civil dusk
7:28 PM
Planting note
Stake and prune tomato suckers. Watch for squash vine borers.
Toa Alta, PR
The moon
Waxing Crescent
5% illuminated
Moonrise
8:16 AM
Moonset
9:01 PM
In sign
♋︎ Cancer
Toa Alta, PR
Microseason
Jun 16–20

Reef polyps synchronize in moonlight

plant
Jan 146% of the yearDec 31

Read this microseason across nine climate regions →

Toa Alta at a glance

  • Today vs. normal: 20°F below the seasonal normal for this latitude
  • Last frost: December 7 (climatological average for this latitude)
  • Microseason: Jun 16–20
  • Planting window: Stake and prune tomato suckers. Watch for squash vine borers.

16-Day Forecast — Toa Alta

  1. Tue89°74°35%
  2. Wed90°73°51%
  3. Thu89°73°77%
  4. Fri89°74°54%
  5. Sat88°74°16%
  6. Sun88°74°100%
  7. Mon90°75°35%
  8. Tue88°76°51%
  9. Wed87°75°54%
  10. Thu88°77°39%
  11. Fri87°76°29%
  12. Sat83°74°51%
  13. Sun86°74°64%
  14. Mon86°74°57%
  15. Tue90°74°58%
  16. Wed92°74°29%

Forecast data from Open-Meteo (CC BY 4.0).

Right now in the garden

Peak growing season

As of June 17, 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.

January 1–5: The year turns in trade winds.January 6–10: Reefs reflect clear winter light.January 11–15: Mangrove buds swell with green.January 16–20: Hibiscus opens in January sun.January 21–25: Early-blooming aster brings gold.January 26–31: Last cold breath, green rising.February 1–5: Plumeria and ceiba crown the canopy.February 6–10: Coral spawn timing aligns with moon.February 11–15: Morning dew lingers on new leaves.February 16–20: Trade-wind rhythm softens slightly.February 21–25: Humidity breaks the dry season spell.February 26–28: Mist rises where rain falls inland.March 1–5: Green thickens in every direction.March 6–10: Hidden creatures awaken in dampness.March 11–15: Fruiting cycles deepen as rains persist.March 16–20: Wings emerge from green.March 21–25: Light holds the horizon.March 26–31: Coral blooms begin.April 1–5: Thunder rolls across the sea.April 6–10: Migrants pour southward.April 11–15: Green deepens in all things.April 16–20: Rain paints the sky.April 21–25: Green shoots rise from the shore.April 26–30: Heat breaks the last restraint.May 1–5: Lei Day—flowers crown the islands.May 6–10: Rain falls on greening grain.May 11–15: Green life breaks upward.May 16–20: Flowers spill across the islands.May 21–25: Summer arrives in thunder.May 26–31: Frogs sing the summer in.June 1–5: First trades stir the ceiba canopy.June 6–10: Afternoon showers claim the ritual.June 11–15: Easterly waves thread the Atlantic.June 16–20: Reef polyps synchronize in moonlight.June 21–25: The sun reaches its zenith turn.June 26–30: Lightning bugs dance above the flooded lowlands.July 1–5: Midyear heat — the wet season grip.July 6–10: Warm breeze across the mangrove maze.July 11–15: Storm surge begins its rhythm.July 16–20: Juvenile raptors test the thermals.July 21–25: The earth releases its breath — humidity peaks.July 26–31: Fruits swell in the tropical canopy.August 1–5: August opens — storms become routine.August 6–10: Autumn whispers in the trade wind shift.August 11–15: Cool winds find their path again.August 16–20: Cicadas hum through the heat.August 21–25: Trade winds gather strength.August 26–31: Hurricane season intensifies.September 1–5: Peak storm season dawns.September 6–10: Wet-season rains peak.September 11–15: Mid-season storm lull.September 16–20: Equinox approaches.September 21–25: Storm intensity ebbs slightly.September 26–30: Late-season storms persist.October 1–5: Easterly waves train across the basin.October 6–10: Hurricane season's second peak.October 11–15: Seasonal wind shift emerges.October 16–20: Atlantic storms retreat.October 21–25: Trade winds solidify.October 26–31: Dry season's arrival.November 1–5: Last storms clear the horizon.November 6–10: Dry season takes hold.November 11–15: Migratory arrivals from the north.November 16–20: The emerald deepens.November 21–25: Dust veil settles.November 26–30: Harvest calm descends.December 1–5: Deep dry season opens.December 6–10: Winter trades blow strong.December 11–15: Solstice approaches in green silence.December 16–20: The sun turns again.December 21–25: Solstice—renewal in stillness.December 26–31: Year's end in tropical stillness.🌱February 14 — First skunk-cabbage spathes thaw their way up☀️March 20 — Spring equinox — day and night balance🌸April 5 — Cherry blossoms peak in the parks🐦May 10 — Warbler migration peaks along the coast✨May 25 — First fireflies scout the meadows at dusk🌞June 21 — Summer solstice — longest day🦗July 25 — Peak cicada chorus in the afternoons🌊August 18 — Warmest sea-surface temperatures of the year🍂September 22 — Autumn equinox — the slow turn❄️October 25 — First widespread frost in the suburbs🍁November 10 — Peak leaf color across the Hudson Valley🌙December 21 — Winter solstice — longest night

Microseason · June 16–20

Reef polyps synchronize in moonlight

Full moon arrives. Coral spawning pulses begin across the reef. Males and females release gametes in tandem — the ocean blooms. Heat builds.

Day 168 of 365 · Wedge 34 of 72

The solar year drawn as a wheel of 72 five-day windows. Each wedge is one microseason; the four colored arcs mark winter, spring, summer, and autumn; the small icons sit at notable phenological events. The crimson pointer creeps clockwise as the year turns.

Planting calendar

MonthPlantHarvest
January——
Februarylettuce, peas, spinach, radishes—
Marchlettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash—
Apriltomatoes, peppers, beans, squash—
Maytomatoes, peppers, beans, squashlettuce, peas, radishes
June—lettuce, peas, radishes
July—tomatoes, beans, summer squash
August—tomatoes, beans, summer squash
September—tomatoes, beans, summer squash
Octoberfall brassicas, garlic (overwinter), carrotswinter squash, tomatoes (last)
Novemberfall brassicas, garlic (overwinter), carrots—
December——

A year in weather

July is Toa Alta's warmest stretch (~81°F) and January its coldest (~75°F); precipitation crests in October at 4.5 inches and ebbs in February to 1.2 inches.

MonthMean tempPrecipRainy days
January75°1.6″28
February75°1.2″26
March76°1.6″26
April77°2.6″27
May79°3.9″30
June81°2.5″28
July81°2.4″30
August81°3.5″30
September81°4.1″29
October79°4.5″31
November78°3.6″29
December76°2.6″30

Regional context

Per NOAA NCEI 1991-2020 normals, Toa Alta runs from a 75°F January mean to 81°F in July, a 6°F seasonal spread, with near 34.2 inches of precipitation across about 343 wet days.

Precipitation in Toa Alta runs summer-dominant: October averages 4.5 inches across 30.7 days of warm-season storms, while February drops to 1.2 inches over 25.5 rainy days of drier cool air. That puts Toa Alta in a summer-convective cohort with places like San José, PR, Río Lajas, PR and Galateo, PR.

With a coldest-month mean of 75°F, Toa Alta stays mostly frost-free and grows year-round. The July peak near 81°F is Toa Alta's real limit, pushing cool-season vegetables to spring and fall. Across Toa Alta, elevation and tree cover drive a 4-7°F spread in Toa Alta's overnight lows.

Similar climates: San José, PR, Río Lajas, PR, Galateo, PR, Mucarabones, PR, Candelaria, PR.

Frequently asked

When does it freeze in Toa Alta?
Toa Alta's last spring frost lands near mid-February, and in Toa Alta the first fall frost follows around mid-December.
What is the rainy season in Toa Alta?
October is the wettest month in Toa Alta, about 4.5 inches on average; the year totals roughly 34 inches.
What is the warmest month in Toa Alta?
July is Toa Alta's warmest month, averaging about 81°F.
What is the coldest month in Toa Alta?
Toa Alta bottoms out in January, with a mean near 75°F.
When can I start a vegetable garden in Toa Alta?
Toa Alta's last frost (mid-February) cues hardy greens; in Toa Alta, hold heat-lovers two weeks past.
How many rainy days does Toa Alta get?
Expect roughly 343 wet days a year in Toa Alta.
What hardiness zone is Toa Alta?
Toa Alta sits in the USDA zone set by January lows near 75°F; the USDA ZIP tool gives the band.
What is the 10-day forecast for Toa Alta?
Toa Alta'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 Toa Alta?
See this week's day-by-day rain chances for Toa Alta in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Toa Alta?
Current conditions for Toa Alta and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Toa Alta forecast updated?
The Toa Alta forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Toa Alta?
Day length in Toa Alta peaks around the June solstice — earliest sunrise and latest sunset — and is shortest near the December solstice.
How accurate is the weather forecast for Toa Alta?
The next few days in Toa Alta's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Toa Alta, Puerto Rico has a varied climate: January averages roughly 75°F, July about 81°F, 6°F between them.

In a typical year Toa Alta records about 34 inches of precipitation on around 343 days.

Latitude 18.4°N gives Toa Alta its 6°F swing, and with it the rhythm of Toa Alta's growing season.

All cities in Puerto Rico →

Bayamón, PR weather →

ZIP codes in Toa Alta

  • 00953
  • 00954

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.