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Hatillo, Puerto Rico climate
Am Tropical monsoon
Hatillo has a remarkably steady tropical climate (Tropical monsoon, Köppen Am). The hottest month is August with an average daily high near 90°F, while the coldest is January averaging around 65°F at night. Precipitation totals about 78 inches a year and is strongly seasonal — August alone averages 10.3 inches while January barely receives 2.30 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)Hatillo climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 84 | 85 | 86 | 87 | 88 | 90 | 90 | 90 | 90 | 89 | 87 | 85 |
| Avg temp (°F) | 75 | 75 | 76 | 77 | 79 | 80 | 81 | 81 | 81 | 80 | 78 | 76 |
| Avg low (°F) | 65 | 65 | 66 | 68 | 70 | 71 | 72 | 72 | 72 | 71 | 69 | 67 |
| Precipitation (in) | 2.3 | 2.6 | 3.3 | 5.8 | 9.7 | 9.1 | 9.0 | 10.3 | 9.3 | 8.9 | 5.2 | 2.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 84 | 85 | 86 | 87 | 88 | 90 |
| Avg temp (°F) | 75 | 75 | 76 | 77 | 79 | 80 |
| Avg low (°F) | 65 | 65 | 66 | 68 | 70 | 71 |
| Precipitation (in) | 2.3 | 2.6 | 3.3 | 5.8 | 9.7 | 9.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 90 | 90 | 90 | 89 | 87 | 85 |
| Avg temp (°F) | 81 | 81 | 81 | 80 | 78 | 76 |
| Avg low (°F) | 72 | 72 | 72 | 71 | 69 | 67 |
| Precipitation (in) | 9.0 | 10.3 | 9.3 | 8.9 | 5.2 | 2.7 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 9 | 9 | 11 | 12 | 17 | 17 | 15 | 17 | 16 | 16 | 13 | 10 |
| Days with high ≥ 90°F (days) | 0.4 | 0.9 | 4 | 4 | 10 | 15 | 15 | 17 | 18 | 13 | 4 | 0.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 9 | 9 | 11 | 12 | 17 | 17 |
| Days with high ≥ 90°F (days) | 0.4 | 0.9 | 4 | 4 | 10 | 15 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 15 | 17 | 16 | 16 | 13 | 10 |
| Days with high ≥ 90°F (days) | 15 | 17 | 18 | 13 | 4 | 0.9 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 40 | 39 | 41 | 44 | 59 | 58 | 53 | 51 | 55 | 51 | 48 | 41 |
| Relative humidity (%) | 78 | 76 | 74 | 75 | 78 | 79 | 79 | 79 | 80 | 80 | 81 | 79 |
| Wind speed (mph) | 8.5 | 8.4 | 7.8 | 7.5 | 7.3 | 7.8 | 8.7 | 8.1 | 7.0 | 6.7 | 7.7 | 8.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 40 | 39 | 41 | 44 | 59 | 58 |
| Relative humidity (%) | 78 | 76 | 74 | 75 | 78 | 79 |
| Wind speed (mph) | 8.5 | 8.4 | 7.8 | 7.5 | 7.3 | 7.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 53 | 51 | 55 | 51 | 48 | 41 |
| Relative humidity (%) | 79 | 79 | 80 | 80 | 81 | 79 |
| Wind speed (mph) | 8.7 | 8.1 | 7.0 | 6.7 | 7.7 | 8.5 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Coloso, a weather station, about 37 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.