Delmas climate

Name: Delmas
Address: HT

Delmas is warmest in July, with average highs of 33 °C, and coldest in January, when nights average 21 °C. May is the wettest month (222 mm) and January the driest (23 mm). Figures are 1991–2020 climate normals.

Across a full year Delmas averages 1,454 mm of rain and 364 days above 25 °C.

Haiti · population 395,260 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month July 33 °C
Coldest month January 21 °C
Driest month January 23 mm
Wettest month May 222 mm
Least cloud January 38 % cloud
Hottest on record July 38 °C
Coldest on record December 12 °C
Warmest sea September 30 °C

What to expectDelmas through the year

Delmas has a clear annual cycle: average daily highs run from 30 °C in January to 33 °C in July, a swing of 3.7 °C in mean temperature across the year.

Counted across a normal year, 364 days a year reach 25 °C, 251 of them reach 30 °C. The warmest reading in the 1991–2020 record is 38 °C, in July.

Rain is strongly seasonal. May averages 222 mm against 23 mm in January — 9.6 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Delmas is warmest in September at 30 °C and coldest in February at 28 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	29.8 °C	23 mm	38 %
February	30.4 °C	39 mm	39 %
March	30.4 °C	94 mm	48 %
April	30.6 °C	149 mm	54 %
May	30.7 °C	222 mm	66 %
June	32.1 °C	131 mm	63 %
July	33.1 °C	114 mm	57 %
August	32.8 °C	175 mm	63 %
September	31.7 °C	199 mm	69 %
October	30.7 °C	187 mm	68 %
November	29.8 °C	88 mm	57 %
December	29.7 °C	33 mm	42 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	29.8 °C	20.6 °C	24.9 °C	33.4 °C	13.1 °C	31	16
February	30.4 °C	21.1 °C	25.3 °C	34.1 °C	14.5 °C	28	18
March	30.4 °C	21.6 °C	25.6 °C	35.9 °C	14.0 °C	31	18
April	30.6 °C	22.5 °C	26.1 °C	35.5 °C	16.5 °C	30	18
May	30.7 °C	23.6 °C	26.7 °C	36.4 °C	15.9 °C	31	20
June	32.1 °C	24.7 °C	28.0 °C	38.2 °C	21.2 °C	30	28
July	33.1 °C	25.0 °C	28.5 °C	38.4 °C	22.4 °C	31	31
August	32.8 °C	25.0 °C	28.3 °C	38.3 °C	22.1 °C	31	30
September	31.7 °C	24.3 °C	27.5 °C	37.0 °C	20.5 °C	30	27
October	30.7 °C	23.5 °C	26.7 °C	35.6 °C	18.3 °C	31	21
November	29.8 °C	21.9 °C	25.5 °C	34.7 °C	15.7 °C	30	12
December	29.7 °C	20.8 °C	25.0 °C	33.8 °C	12.4 °C	31	14

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	23 mm	6	11 h/day	38 %	73 %	8.1 km/h	27.8 °C
February	39 mm	7	12 h/day	39 %	71 %	8.8 km/h	27.6 °C
March	94 mm	14	12 h/day	48 %	71 %	8.3 km/h	27.6 °C
April	149 mm	18	13 h/day	54 %	74 %	8.0 km/h	28.1 °C
May	222 mm	22	13 h/day	66 %	77 %	8.0 km/h	28.7 °C
June	131 mm	18	13 h/day	63 %	74 %	8.6 km/h	29.2 °C
July	114 mm	18	13 h/day	57 %	71 %	8.5 km/h	29.6 °C
August	175 mm	21	13 h/day	63 %	73 %	8.3 km/h	30.0 °C
September	199 mm	23	12 h/day	69 %	77 %	7.6 km/h	30.1 °C
October	187 mm	22	12 h/day	68 %	79 %	7.5 km/h	29.9 °C
November	88 mm	14	11 h/day	57 %	79 %	7.3 km/h	29.4 °C
December	33 mm	6	11 h/day	42 %	76 %	7.8 km/h	28.6 °C

How Delmas compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Delmas	33 °C	21 °C	1,454 mm	364
Pétionville · Haiti	31 °C	19 °C	1,532 mm	363
Port-au-Prince · Haiti	34 °C	21 °C	1,454 mm	365
Carrefour · Haiti	33 °C	21 °C	1,285 mm	365
Saint-Marc · Haiti	32 °C	22 °C	644 mm	365
Dessalines · Haiti	34 °C	21 °C	966 mm	365
Port-de-Paix · Haiti	32 °C	22 °C	1,000 mm	360

Where Delmas ranks

Ranking	Position	Value
Warmest sea temperatures in the world in October	21st of 50	30 °C
Warmest sea temperatures in the world in September	24th of 50	30 °C
Warmest sea temperatures in the world in November	37th of 50	29 °C
Warmest sea temperatures in the world in August	45th of 50	30 °C

Planning a trip? See the best time to visit Delmas.

QuestionsCommon questions about Delmas’s climate

When is the best time to visit Delmas?

That depends on what you want, so the honest answer is a comparison rather than a single month. January, February, December sit closest to 20 °C on average, July is the warmest month and January the driest. The month-by-month table above has the full picture.

How hot does Delmas get?

In July, the warmest month, daily highs average 33 °C. About 251 days a year pass 30 °C. The highest value in the 1991–2020 record is 38 °C.

How cold does it get in winter?

Nights average 21 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Delmas?

May, averaging 222 mm over 22 days with rain. The driest month is January with 23 mm. The year as a whole averages 1,454 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Delmas rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 18.545°, -72.300° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.