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Castle Douglas Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Castle Douglas.
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Climate overview of Castle Douglas
Temperatures in Castle Douglas, Dumfries and Galloway, United Kingdom, shift moderately through the seasons. The warmest month is July at 19°C (66°F), and the coolest is January at 8°C (46°F).
The city receives considerable rain/snowfall, with around 1338 mm (53 in) annually. October is the wettest month. It has pleasant summers and cold winters. The most sunshine falls in May, with an average of 5.4 hours of daily sunshine.
Castle Douglas Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Castle Douglas - and find the best time to visit.
Monthly Temperature in Castle Douglas
The climate in Castle Douglas experiences moderate temperature changes, with mild shifts between seasons. Typically, average maximum daytime temperatures range from a pleasant 19°C (66°F) in July to a chilly 8°C (46°F) in the coolest month, January.
Nights vary from 12°C (54°F) in July to around 3°C (37°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Castle Douglas
Castle Douglas has a notably wet climate with abundant precipitation, recording 1338 mm (53 in) of rain/snowfall per year. Castle Douglas offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month October (139 mm (5.5 in)) and the driest month May (84 mm (3.3 in)) is not too significant. For more details, please visit our Castle Douglas Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Castle Douglas
For those who appreciate different seasons, Castle Douglas serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 5.4 hours of sunshine daily, and embrace the darker days in January, offering only 1.3 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Eskdalemuir, the United Kingdom (62 KM, 38 Miles).
Daily hours of sunshine
Data from: Eskdalemuir, the United Kingdom (62 KM, 38 Miles).
Daily percentage of sunshine
Data from: Eskdalemuir, the United Kingdom (62 KM, 38 Miles).
Humidity in Castle Douglas by Month
The city experiences its highest humidity in December, reaching 90%. In May, the humidity drops to its lowest level at 70%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Data from: Eskdalemuir, the United Kingdom (62 KM, 38 Miles).
Best Time to Visit Castle Douglas
Compared with the rest of the year, the most comfortable conditions in Castle Douglas are usually found in May, June, July and August. Conditions are generally least comfortable in January, February, March, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
wet
Feb
wet
Mar
cold
Apr
mixed
May
good
Jun
good
Jul
good
Aug
good
Sep
mixed
Oct
mixed
Nov
wet
Dec
wet
- Best overall: May, June, July and August
- Warmest weather: July and August
- Most sunshine: May and June
- Seasonal pattern: Pleasant summers and cold winters
Frequently asked questions about the climate in Castle Douglas
What is the best time to visit Castle Douglas?
May, June, July and August typically offer the most optimal weather in Castle Douglas. In contrast, January, February, March, November and December tend to have less optimal conditions. Castle Douglas has pleasant summers and cold winters.
What temperatures can I expect in Castle Douglas?
Daytime highs range from 8°C (46°F) in January to 19°C (66°F) in July. Nighttime lows range from 3°C (37°F) to 12°C (54°F).
How much rain does Castle Douglas get?
Annual rainfall is around 1338 mm (53 in). October is the wettest month with 139 mm (5.5 in), while May is the driest with 84 mm (3.3 in).
How sunny is Castle Douglas?
Castle Douglas receives around 1,189 hours of sunshine per year. May is the sunniest month with 161 hours, while January is the cloudiest with just 39 hours.
Castle Douglas 3-Day Forecast
Castle Douglas on the map
Castle Douglas is highlighted - select any city to see its climate.
Popular in October
Where to go in October - average daytime high across popular destinations.
London
16°C (61°F) Bath15°C (59°F) Torquay16°C (61°F) Manchester14°C (57°F) York15°C (59°F) Blackpool
15°C (59°F) Edinburgh13°C (55°F) Glasgow14°C (57°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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