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Toa Baja, Puerto Rico climate
Am Tropical monsoon
Toa Baja has a remarkably steady tropical climate (Tropical monsoon, Köppen Am). The hottest month is August with an average daily high near 31°C, while the coldest is January averaging around 20°C at night. Precipitation totals about 1607 mm a year and is strongly seasonal — November alone averages 224 mm while March barely receives 42 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Toa Baja climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 27 | 28 | 29 | 30 | 30 | 30 | 31 | 31 | 30 | 29 | 28 |
| Avg temp (°C) | 23 | 23 | 24 | 25 | 26 | 26 | 27 | 27 | 27 | 26 | 25 | 24 |
| Avg low (°C) | 20 | 20 | 20 | 21 | 22 | 23 | 23 | 23 | 23 | 22 | 22 | 20 |
| Precipitation (mm) | 140 | 99 | 42 | 108 | 150 | 97 | 176 | 122 | 155 | 152 | 224 | 143 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 27 | 28 | 29 | 30 | 30 |
| Avg temp (°C) | 23 | 23 | 24 | 25 | 26 | 26 |
| Avg low (°C) | 20 | 20 | 20 | 21 | 22 | 23 |
| Precipitation (mm) | 140 | 99 | 42 | 108 | 150 | 97 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 31 | 31 | 30 | 29 | 28 |
| Avg temp (°C) | 27 | 27 | 27 | 26 | 25 | 24 |
| Avg low (°C) | 23 | 23 | 23 | 22 | 22 | 20 |
| Precipitation (mm) | 176 | 122 | 155 | 152 | 224 | 143 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 15 | 12 | 9 | 11 | 12 | 10 | 15 | 11 | 14 | 13 | 15 | 15 |
| Days with high ≥ 32°C (days) | — | 0.3 | 1 | 1 | 4 | 4 | 3 | 7 | 8 | 6 | 1 | 0.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 15 | 12 | 9 | 11 | 12 | 10 |
| Days with high ≥ 32°C (days) | — | 0.3 | 1 | 1 | 4 | 4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 15 | 11 | 14 | 13 | 15 | 15 |
| Days with high ≥ 32°C (days) | 3 | 7 | 8 | 6 | 1 | 0.1 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 56 | 56 | 57 | 56 | 67 | 64 | 61 | 59 | 63 | 59 | 59 | 55 |
| Relative humidity (%) | 78 | 76 | 74 | 75 | 78 | 79 | 79 | 79 | 80 | 81 | 81 | 79 |
| Wind speed (m/s) | 4.2 | 4.2 | 4.0 | 3.9 | 3.8 | 4.1 | 4.4 | 4.1 | 3.5 | 3.3 | 3.7 | 4.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 56 | 56 | 57 | 56 | 67 | 64 |
| Relative humidity (%) | 78 | 76 | 74 | 75 | 78 | 79 |
| Wind speed (m/s) | 4.2 | 4.2 | 4.0 | 3.9 | 3.8 | 4.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 59 | 63 | 59 | 59 | 55 |
| Relative humidity (%) | 79 | 79 | 80 | 81 | 81 | 79 |
| Wind speed (m/s) | 4.4 | 4.1 | 3.5 | 3.3 | 3.7 | 4.1 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 11 years of daily observations at Dorado 2 Wnw, a weather station, about 6 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.