Climate averages 1991–2020

Douglas weather
in May.

A cool, moderately wet month: the 6th warmest and the driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 11.7°C Daytime mean, May

Average low 9.3°C Night-time mean, May

Rainfall 56 mm 11 days with ≥1 mm

Daylight 16 h Sunrise to sunset, per day

May is a cool month in Douglas: daytime highs average 11.7°C and nights cool to about 9.3°C. By daytime temperature it is the 6th warmest of the 12 months.

Expect about 56 mm of rain on roughly 11 days, which makes May a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 15 h 58 min on an average May day.

The nearest other city in this atlas is Blackpool (101 km away). In May its highs average 13.6°C, 2.0°C warmer than Douglas, with 73 mm of rain.

From May to June, average highs rise by 2.2°C to 13.8°C, and monthly rainfall rises from 56 mm to 64 mm.

The annual picture

May in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Douglas climate table

1991–2020

Monthly climate averages for Douglas, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	8.1°C5.8°C	5.8°C	97	16.5	8.08 h
February	7.6°C5.4°C	5.4°C	76	14.3	9.710 h
March	8.1°C5.8°C	5.8°C	70	12.9	11.812 h
April	9.4°C7.1°C	7.1°C	59	11.7	14.014 h
May, selected	11.7°C9.3°C	9.3°C	56	11.2	16.016 h
June	13.8°C11.7°C	11.7°C	64	10.7	17.117 h
July	15.5°C13.5°C	13.5°C	67	12.2	16.617 h
August	16.0°C14.0°C	14.0°C	78	12.9	14.915 h
September	15.1°C13.1°C	13.1°C	85	13.3	12.813 h
October	13.1°C11.0°C	11.0°C	117	16.1	10.611 h
November	10.6°C8.5°C	8.5°C	125	18.5	8.69 h
December	8.9°C6.6°C	6.6°C	114	18.2	7.57 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

May in nearby cities

Distance from Douglas

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Douglas) is explained once on the Douglas year overview and on the Sources, method and limits page.