Hamilton climate

Name: Hamilton
Address: BM

Hamilton is warmest in August, with average highs of 27 °C, and coldest in March, when nights average 17 °C. October is the wettest month (142 mm) and April the driest (82 mm). Figures are 1991–2020 climate normals.

Across a full year Hamilton averages 1,303 mm of rain and 112 days above 25 °C.

Bermuda · population 902 · 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 August 27 °C
Coldest month March 17 °C
Driest month April 82 mm
Wettest month October 142 mm
Least cloud July 50 % cloud
Hottest on record August 29 °C
Coldest on record March 10 °C
Warmest sea August 28 °C

What to expectHamilton through the year

Hamilton has a clear annual cycle: average daily highs run from 19 °C in March to 27 °C in August, a swing of 8.7 °C in mean temperature across the year.

Counted across a normal year, 112 days a year reach 25 °C. The warmest reading in the 1991–2020 record is 29 °C, in August.

Rain is spread fairly evenly through the year, from 82 mm in April to 142 mm in October. There is no dry season to aim for.

The sea off Hamilton is warmest in August at 28 °C and coldest in March at 19 °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	19.5 °C	106 mm	71 %
February	19.1 °C	101 mm	69 %
March	18.8 °C	110 mm	65 %
April	19.7 °C	82 mm	58 %
May	21.6 °C	87 mm	57 %
June	24.4 °C	109 mm	58 %
July	26.5 °C	106 mm	50 %
August	27.1 °C	125 mm	50 %
September	26.5 °C	137 mm	56 %
October	24.7 °C	142 mm	63 %
November	22.4 °C	98 mm	63 %
December	20.7 °C	99 mm	68 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C
January	19.5 °C	17.3 °C	18.4 °C	23.0 °C	10.5 °C	0
February	19.1 °C	16.8 °C	17.9 °C	22.1 °C	10.7 °C	0
March	18.8 °C	16.7 °C	17.7 °C	22.1 °C	10.0 °C	0
April	19.7 °C	18.1 °C	18.9 °C	22.2 °C	12.7 °C	0
May	21.6 °C	20.3 °C	21.0 °C	24.8 °C	15.6 °C	0
June	24.4 °C	23.1 °C	23.8 °C	27.1 °C	18.4 °C	9
July	26.5 °C	25.2 °C	25.9 °C	28.5 °C	22.5 °C	30
August	27.1 °C	25.6 °C	26.4 °C	29.0 °C	22.0 °C	31
September	26.5 °C	25.0 °C	25.8 °C	28.9 °C	22.5 °C	29
October	24.7 °C	23.2 °C	24.0 °C	27.4 °C	16.9 °C	14
November	22.4 °C	20.7 °C	21.5 °C	25.6 °C	14.3 °C	0
December	20.7 °C	18.8 °C	19.7 °C	23.9 °C	13.0 °C	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	106 mm	13	10 h/day	71 %	71 %	41 km/h	20.4 °C
February	101 mm	12	11 h/day	69 %	72 %	41 km/h	19.7 °C
March	110 mm	12	12 h/day	65 %	72 %	39 km/h	19.4 °C
April	82 mm	10	13 h/day	58 %	75 %	34 km/h	19.9 °C
May	87 mm	9	14 h/day	57 %	79 %	29 km/h	21.5 °C
June	109 mm	12	14 h/day	58 %	83 %	26 km/h	24.2 °C
July	106 mm	15	14 h/day	50 %	82 %	25 km/h	26.8 °C
August	125 mm	16	13 h/day	50 %	81 %	24 km/h	27.9 °C
September	137 mm	14	12 h/day	56 %	79 %	27 km/h	27.3 °C
October	142 mm	13	11 h/day	63 %	75 %	32 km/h	25.7 °C
November	98 mm	11	11 h/day	63 %	71 %	35 km/h	23.5 °C
December	99 mm	10	10 h/day	68 %	71 %	38 km/h	21.7 °C

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

QuestionsCommon questions about Hamilton’s climate

When is the best time to visit Hamilton?

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

How hot does Hamilton get?

In August, the warmest month, daily highs average 27 °C. The highest value in the 1991–2020 record is 29 °C.

How cold does it get in winter?

Nights average 17 °C in March, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Hamilton?

October, averaging 142 mm over 13 days with rain. The driest month is April with 82 mm. The year as a whole averages 1,303 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 Hamilton 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
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.