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Port Antonio, Jamaica climate
BSh Hot semi-arid
Port Antonio has a remarkably steady tropical climate (Hot semi-arid, Köppen BSh). The hottest month is August with an average daily high near 92°F, while the coldest is February averaging around 72°F at night. Precipitation totals about 32 inches a year and is strongly seasonal — October alone averages 8.1 inches while February barely receives 0.52 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsPort Antonio climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 88 | 88 | 88 | 89 | 90 | 92 | 92 | 92 | 92 | 91 | 90 | 89 |
| Avg temp (°F) | 80 | 80 | 81 | 82 | 83 | 85 | 85 | 85 | 85 | 84 | 83 | 81 |
| Avg low (°F) | 72 | 72 | 73 | 75 | 76 | 78 | 78 | 78 | 78 | 76 | 75 | 73 |
| Precipitation (in) | 0.5 | 0.5 | 1.6 | 0.9 | 3.9 | 1.5 | 1.1 | 3.2 | 5.6 | 8.1 | 3.0 | 1.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 88 | 88 | 88 | 89 | 90 | 92 |
| Avg temp (°F) | 80 | 80 | 81 | 82 | 83 | 85 |
| Avg low (°F) | 72 | 72 | 73 | 75 | 76 | 78 |
| Precipitation (in) | 0.5 | 0.5 | 1.6 | 0.9 | 3.9 | 1.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 92 | 92 | 92 | 91 | 90 | 89 |
| Avg temp (°F) | 85 | 85 | 85 | 84 | 83 | 81 |
| Avg low (°F) | 78 | 78 | 78 | 76 | 75 | 73 |
| Precipitation (in) | 1.1 | 3.2 | 5.6 | 8.1 | 3.0 | 1.7 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 2 | 2 | 3 | 2 | 5 | 3 | 3 | 4 | 6 | 7 | 5 | 3 |
| Days with high ≥ 90°F (days) | 6 | 4 | 4 | 9 | 15 | 20 | 24 | 24 | 22 | 21 | 16 | 11 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 2 | 2 | 3 | 2 | 5 | 3 |
| Days with high ≥ 90°F (days) | 6 | 4 | 4 | 9 | 15 | 20 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 3 | 4 | 6 | 7 | 5 | 3 |
| Days with high ≥ 90°F (days) | 24 | 24 | 22 | 21 | 16 | 11 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 39 | 33 | 34 | 37 | 54 | 57 | 48 | 51 | 57 | 59 | 50 | 43 |
| Clear days (≤ 30% cloud) | 13 | 16 | 17 | 15 | 9 | 6 | 9 | 9 | 7 | 7 | 10 | 12 |
| Partly cloudy days (30–70%) | 14 | 11 | 12 | 11 | 12 | 13 | 14 | 14 | 13 | 11 | 12 | 14 |
| Cloudy days (≥ 70%) | 4 | 2 | 2 | 4 | 10 | 11 | 7 | 9 | 11 | 13 | 8 | 6 |
| Relative humidity (%) | 74 | 73 | 70 | 70 | 75 | 79 | 78 | 78 | 78 | 79 | 77 | 76 |
| Wind speed (mph) | 11.2 | 11.3 | 10.9 | 10.6 | 11.0 | 12.4 | 11.7 | 10.3 | 8.6 | 8.7 | 9.7 | 10.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 39 | 33 | 34 | 37 | 54 | 57 |
| Clear days (≤ 30% cloud) | 13 | 16 | 17 | 15 | 9 | 6 |
| Partly cloudy days (30–70%) | 14 | 11 | 12 | 11 | 12 | 13 |
| Cloudy days (≥ 70%) | 4 | 2 | 2 | 4 | 10 | 11 |
| Relative humidity (%) | 74 | 73 | 70 | 70 | 75 | 79 |
| Wind speed (mph) | 11.2 | 11.3 | 10.9 | 10.6 | 11.0 | 12.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 48 | 51 | 57 | 59 | 50 | 43 |
| Clear days (≤ 30% cloud) | 9 | 9 | 7 | 7 | 10 | 12 |
| Partly cloudy days (30–70%) | 14 | 14 | 13 | 11 | 12 | 14 |
| Cloudy days (≥ 70%) | 7 | 9 | 11 | 13 | 8 | 6 |
| Relative humidity (%) | 78 | 78 | 78 | 79 | 77 | 76 |
| Wind speed (mph) | 11.7 | 10.3 | 8.6 | 8.7 | 9.7 | 10.9 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 26 years of daily observations at Norman Manley Intl, a weather station, about 45 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.