Monthly Climate
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Best time to visit Douglas

August is the best time to visit Douglas for general sightseeing, with average highs of 16 °C and about 13 wet days. The comfortable season runs roughly June to September.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking August comfort 63/100
A beach holiday August sea 15 °C
The least cloud May 61 % average cloud cover
The least rain May 58 mm
Warmth August 16 °C
Cooler weather February 7.5 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 August 63 16 °C 13 16
2 July 63 16 °C 12 12
3 June 59 14 °C 11 9
4 September 58 15 °C 13 11
5 May 50 12 °C 11 9
6 October 48 13 °C 16 0
7 April 38 9.5 °C 12 7
8 November 34 10 °C 18 0
9 March 31 8.0 °C 13 5
10 December 27 8.7 °C 18 0
11 February 27 7.5 °C 14 2
12 January 25 7.9 °C 16 0

For a beach holiday

August scores highest, with a sea temperature of 15 °C and air temperatures around 16 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 8.6 °C 7.9 °C 72 % 0
February 7.7 °C 7.5 °C 70 % 2
March 7.6 °C 8.0 °C 69 % 5
April 8.4 °C 9.5 °C 65 % 7
May 10 °C 12 °C 61 % 9
June 12 °C 14 °C 66 % 9
July 14 °C 16 °C 67 % 12
August 15 °C 16 °C 67 % 16
September 15 °C 15 °C 68 % 11
October 14 °C 13 °C 71 % 0
November 12 °C 10 °C 72 % 0
December 10 °C 8.7 °C 72 % 0

When to think twice

January scores lowest with about 16 wet days and highs near 7.9 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January 7.9 °C 98 mm 72 %
February 7.5 °C 80 mm 70 %
March 8.0 °C 73 mm 69 %
April 9.5 °C 61 mm 65 %
May 11.9 °C 58 mm 61 %
June 14.1 °C 68 mm 66 %
July 15.7 °C 69 mm 67 %
August 16.1 °C 82 mm 67 %
September 15.1 °C 87 mm 68 %
October 12.9 °C 118 mm 71 %
November 10.4 °C 127 mm 72 %
December 8.7 °C 115 mm 72 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. 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.