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Guayama, Puerto Rico climate
Aw Tropical savanna (dry winter)
Guayama has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is August with an average daily high near 90°F, while the coldest is February averaging around 72°F at night. Precipitation totals about 54 inches a year and is strongly seasonal — September alone averages 7.8 inches while February barely receives 1.73 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)Guayama climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 85 | 85 | 86 | 87 | 88 | 89 | 90 | 90 | 90 | 89 | 88 | 86 |
| Avg temp (°F) | 79 | 79 | 79 | 80 | 82 | 83 | 84 | 84 | 83 | 83 | 81 | 80 |
| Avg low (°F) | 72 | 72 | 72 | 74 | 76 | 77 | 78 | 78 | 77 | 76 | 74 | 73 |
| Precipitation (in) | 2.2 | 1.7 | 1.9 | 2.8 | 4.8 | 4.3 | 5.5 | 7.0 | 7.8 | 7.4 | 5.7 | 2.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 85 | 85 | 86 | 87 | 88 | 89 |
| Avg temp (°F) | 79 | 79 | 79 | 80 | 82 | 83 |
| Avg low (°F) | 72 | 72 | 72 | 74 | 76 | 77 |
| Precipitation (in) | 2.2 | 1.7 | 1.9 | 2.8 | 4.8 | 4.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 90 | 90 | 90 | 89 | 88 | 86 |
| Avg temp (°F) | 84 | 84 | 83 | 83 | 81 | 80 |
| Avg low (°F) | 78 | 78 | 77 | 76 | 74 | 73 |
| Precipitation (in) | 5.5 | 7.0 | 7.8 | 7.4 | 5.7 | 2.8 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 14 | 13 | 11 | 12 | 15 | 16 | 17 | 18 | 15 | 17 | 15 | 15 |
| Days with high ≥ 90°F (days) | 0.1 | 0.2 | 0.9 | 2 | 4 | 11 | 17 | 19 | 17 | 12 | 6 | 0.9 |
| Days with low ≤ 32°F (days) | — | — | — | — | — | — | — | 0.0 | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 14 | 13 | 11 | 12 | 15 | 16 |
| Days with high ≥ 90°F (days) | 0.1 | 0.2 | 0.9 | 2 | 4 | 11 |
| Days with low ≤ 32°F (days) | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 17 | 18 | 15 | 17 | 15 | 15 |
| Days with high ≥ 90°F (days) | 17 | 19 | 17 | 12 | 6 | 0.9 |
| Days with low ≤ 32°F (days) | — | 0.0 | — | — | — | — |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 35 | 33 | 35 | 38 | 53 | 53 | 47 | 47 | 54 | 52 | 47 | 38 |
| Relative humidity (%) | 80 | 77 | 74 | 75 | 78 | 80 | 80 | 80 | 81 | 82 | 83 | 82 |
| Wind speed (mph) | 8.4 | 8.6 | 8.2 | 8.1 | 8.1 | 8.7 | 9.3 | 8.5 | 7.2 | 6.8 | 7.4 | 8.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 35 | 33 | 35 | 38 | 53 | 53 |
| Relative humidity (%) | 80 | 77 | 74 | 75 | 78 | 80 |
| Wind speed (mph) | 8.4 | 8.6 | 8.2 | 8.1 | 8.1 | 8.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 47 | 47 | 54 | 52 | 47 | 38 |
| Relative humidity (%) | 80 | 80 | 81 | 82 | 83 | 82 |
| Wind speed (mph) | 9.3 | 8.5 | 7.2 | 6.8 | 7.4 | 8.2 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Guayama 1sw, a weather station, about 1 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.