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Black River, Jamaica climate
Aw Tropical savanna (dry winter)
Black River has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is August with an average daily high near 34°C, while the coldest is January averaging around 22°C at night. Around 1040 mm of precipitation falls each year, peaking in October (134 mm) and easing off in February (45 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)Black River climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 30 | 31 | 32 | 32 | 33 | 34 | 34 | 33 | 32 | 32 | 31 |
| Avg temp (°C) | 26 | 26 | 26 | 27 | 28 | 29 | 29 | 29 | 29 | 28 | 28 | 27 |
| Avg low (°C) | 22 | 22 | 22 | 23 | 24 | 24 | 25 | 25 | 24 | 24 | 24 | 23 |
| Precipitation (mm) | 62 | 45 | 45 | 97 | 129 | 72 | 49 | 98 | 116 | 134 | 107 | 87 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 30 | 31 | 32 | 32 | 33 |
| Avg temp (°C) | 26 | 26 | 26 | 27 | 28 | 29 |
| Avg low (°C) | 22 | 22 | 22 | 23 | 24 | 24 |
| Precipitation (mm) | 62 | 45 | 45 | 97 | 129 | 72 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 34 | 34 | 33 | 32 | 32 | 31 |
| Avg temp (°C) | 29 | 29 | 29 | 28 | 28 | 27 |
| Avg low (°C) | 25 | 25 | 24 | 24 | 24 | 23 |
| Precipitation (mm) | 49 | 98 | 116 | 134 | 107 | 87 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 5 | 4 | 4 | 4 | 7 | 5 | 4 | 5 | 7 | 9 | 7 | 7 |
| Days with high ≥ 32°C (days) | 0.9 | 2 | 3 | 10 | 17 | 23 | 25 | 25 | 23 | 20 | 10 | 3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 5 | 4 | 4 | 4 | 7 | 5 |
| Days with high ≥ 32°C (days) | 0.9 | 2 | 3 | 10 | 17 | 23 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 5 | 7 | 9 | 7 | 7 |
| Days with high ≥ 32°C (days) | 25 | 25 | 23 | 20 | 10 | 3 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 51 | 47 | 49 | 52 | 63 | 66 | 60 | 65 | 66 | 65 | 58 | 53 |
| Relative humidity (%) | 74 | 72 | 70 | 69 | 72 | 76 | 76 | 75 | 76 | 78 | 78 | 76 |
| Wind speed (mph) | 11.3 | 10.9 | 10.2 | 9.2 | 9.4 | 10.7 | 10.3 | 9.2 | 7.9 | 8.7 | 10.5 | 11.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 51 | 47 | 49 | 52 | 63 | 66 |
| Relative humidity (%) | 74 | 72 | 70 | 69 | 72 | 76 |
| Wind speed (mph) | 11.3 | 10.9 | 10.2 | 9.2 | 9.4 | 10.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 65 | 66 | 65 | 58 | 53 |
| Relative humidity (%) | 76 | 75 | 76 | 78 | 78 | 76 |
| Wind speed (mph) | 10.3 | 9.2 | 7.9 | 8.7 | 10.5 | 11.3 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 27 years of daily observations at Montego Bay/sangste, a weather station, about 53 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.