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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 33°C, while the coldest is February averaging around 22°C at night. Precipitation totals about 801 mm a year and is strongly seasonal — October alone averages 205 mm while February barely receives 13 mm.

☀️ Summers

Hot

Highs near 33°C in August.

About 176 days a year above 32 °C

❄️ Winters

Mild

Lows near 22°C in February.

🌧️ Rain

Moderate rainfall

About 801 mm of rain a year.

Wettest in October

⛅ Sky & trend

Fairly sunny

More sun than cloud through the year.

+0.4 °C vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Port Antonio climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	31	31	31	32	32	33	33	33	33	33	32	32
Avg temp (°C)	27	27	27	28	28	29	30	30	29	29	28	27
Avg low (°C)	22	22	23	24	25	26	26	26	25	25	24	23
Precipitation (mm)	14	13	41	23	98	37	28	81	142	205	76	43

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	31	31	31	32	32	33
Avg temp (°C)	27	27	27	28	28	29
Avg low (°C)	22	22	23	24	25	26
Precipitation (mm)	14	13	41	23	98	37

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	33	33	33	33	32	32
Avg temp (°C)	30	30	29	29	28	27
Avg low (°C)	26	26	25	25	24	23
Precipitation (mm)	28	81	142	205	76	43

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 ≥ 32°C (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 ≥ 32°C (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 ≥ 32°C (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 (m/s)	5.0	5.0	4.9	4.7	4.9	5.5	5.2	4.6	3.9	3.9	4.3	4.9

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 (m/s)	5.0	5.0	4.9	4.7	4.9	5.5

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 (m/s)	5.2	4.6	3.9	3.9	4.3	4.9

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.

How we build these numbers →