Adamstown climate

Name: Adamstown
Address: PN

Adamstown is warmest in March, with average highs of 25 °C, and coldest in September, when nights average 20 °C. December is the wettest month (155 mm) and July the driest (104 mm). Figures are 1991–2020 climate normals.

Across a full year Adamstown averages 1,423 mm of rain and 64 days above 25 °C.

Pitcairn · population 46 · 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 March 25 °C
Coldest month September 20 °C
Driest month July 104 mm
Wettest month December 155 mm
Least cloud March 55 % cloud
Hottest on record February 27 °C
Coldest on record July 15 °C
Warmest sea February 27 °C

What to expectAdamstown through the year

Adamstown has a clear annual cycle: average daily highs run from 21 °C in September to 25 °C in March, a swing of 4.4 °C in mean temperature across the year.

Counted across a normal year, 64 days a year reach 25 °C. The warmest reading in the 1991–2020 record is 27 °C, in February.

Rain is spread fairly evenly through the year, from 104 mm in July to 155 mm in December. There is no dry season to aim for.

The sea off Adamstown is warmest in February at 27 °C and coldest in August at 22 °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	24.9 °C	119 mm	59 %
February	25.3 °C	110 mm	57 %
March	25.4 °C	111 mm	55 %
April	24.5 °C	130 mm	63 %
May	23.2 °C	111 mm	65 %
June	22.2 °C	122 mm	66 %
July	21.3 °C	104 mm	62 %
August	21.0 °C	112 mm	61 %
September	21.0 °C	110 mm	66 %
October	21.5 °C	128 mm	69 %
November	22.6 °C	110 mm	69 %
December	23.8 °C	155 mm	68 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C
January	24.9 °C	23.6 °C	24.2 °C	26.7 °C	20.6 °C	13
February	25.3 °C	24.0 °C	24.7 °C	27.2 °C	21.4 °C	18
March	25.4 °C	24.1 °C	24.7 °C	27.1 °C	21.0 °C	21
April	24.5 °C	23.2 °C	23.8 °C	26.9 °C	19.9 °C	9
May	23.2 °C	22.0 °C	22.6 °C	25.6 °C	18.4 °C	1
June	22.2 °C	21.0 °C	21.6 °C	24.8 °C	15.9 °C	0
July	21.3 °C	20.1 °C	20.7 °C	23.7 °C	14.9 °C	0
August	21.0 °C	19.8 °C	20.4 °C	23.5 °C	15.4 °C	0
September	21.0 °C	19.8 °C	20.4 °C	23.4 °C	15.3 °C	0
October	21.5 °C	20.4 °C	20.9 °C	24.1 °C	16.1 °C	0
November	22.6 °C	21.4 °C	22.0 °C	24.9 °C	18.1 °C	0
December	23.8 °C	22.7 °C	23.2 °C	25.7 °C	19.1 °C	2

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	119 mm	13	14 h/day	59 %	80 %	26 km/h	25.9 °C
February	110 mm	13	13 h/day	57 %	80 %	26 km/h	26.6 °C
March	111 mm	12	12 h/day	55 %	79 %	26 km/h	26.6 °C
April	130 mm	13	12 h/day	63 %	77 %	29 km/h	25.8 °C
May	111 mm	10	11 h/day	65 %	74 %	30 km/h	24.6 °C
June	122 mm	10	11 h/day	66 %	75 %	32 km/h	23.5 °C
July	104 mm	11	11 h/day	62 %	73 %	32 km/h	22.6 °C
August	112 mm	10	11 h/day	61 %	74 %	32 km/h	22.2 °C
September	110 mm	9	12 h/day	66 %	74 %	31 km/h	22.2 °C
October	128 mm	11	13 h/day	69 %	77 %	30 km/h	22.5 °C
November	110 mm	10	13 h/day	69 %	78 %	28 km/h	23.5 °C
December	155 mm	13	14 h/day	68 %	80 %	27 km/h	24.7 °C

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

QuestionsCommon questions about Adamstown’s climate

When is the best time to visit Adamstown?

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

How hot does Adamstown get?

In March, the warmest month, daily highs average 25 °C. The highest value in the 1991–2020 record is 27 °C.

How cold does it get in winter?

Nights average 20 °C in September, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Adamstown?

December, averaging 155 mm over 13 days with rain. The driest month is July with 104 mm. The year as a whole averages 1,423 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 Adamstown 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.