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Toa Alta, Puerto Rico climate
Am Tropical monsoon
Toa Alta has a remarkably steady tropical climate (Tropical monsoon, Köppen Am). The hottest month is August with an average daily high near 88°F, while the coldest is January averaging around 67°F at night. Precipitation totals about 63 inches a year and is strongly seasonal — November alone averages 8.8 inches while March barely receives 1.65 inches.
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 Alta climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 79 | 80 | 82 | 84 | 86 | 86 | 86 | 88 | 87 | 86 | 84 | 82 |
| Avg temp (°F) | 73 | 74 | 75 | 77 | 78 | 79 | 80 | 81 | 80 | 79 | 77 | 75 |
| Avg low (°F) | 67 | 67 | 68 | 70 | 71 | 73 | 73 | 73 | 73 | 72 | 71 | 69 |
| Precipitation (in) | 5.5 | 3.9 | 1.7 | 4.3 | 5.9 | 3.8 | 6.9 | 4.8 | 6.1 | 6.0 | 8.8 | 5.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 79 | 80 | 82 | 84 | 86 | 86 |
| Avg temp (°F) | 73 | 74 | 75 | 77 | 78 | 79 |
| Avg low (°F) | 67 | 67 | 68 | 70 | 71 | 73 |
| Precipitation (in) | 5.5 | 3.9 | 1.7 | 4.3 | 5.9 | 3.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 86 | 88 | 87 | 86 | 84 | 82 |
| Avg temp (°F) | 80 | 81 | 80 | 79 | 77 | 75 |
| Avg low (°F) | 73 | 73 | 73 | 72 | 71 | 69 |
| Precipitation (in) | 6.9 | 4.8 | 6.1 | 6.0 | 8.8 | 5.6 |
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 ≥ 90°F (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 ≥ 90°F (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 ≥ 90°F (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 (mph) | 9.3 | 9.4 | 8.9 | 8.7 | 8.6 | 9.2 | 9.9 | 9.2 | 7.9 | 7.4 | 8.3 | 9.2 |
| 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 (mph) | 9.3 | 9.4 | 8.9 | 8.7 | 8.6 | 9.2 |
| 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 (mph) | 9.9 | 9.2 | 7.9 | 7.4 | 8.3 | 9.2 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 11 years of daily observations at Dorado 2 Wnw, a weather station, about 11 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.