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Gretna Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Gretna.
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Climate overview of Gretna
Gretna, Dumfries and Galloway, United Kingdom, sees big temperature differences between seasons, with July peaking at 20°C (68°F) and January dropping to 8°C (46°F).
The city receives considerable rain/snowfall, with around 1086 mm (43 in) annually. December is the wettest month. It has pleasant summers and cold winters. The sunniest month is May, with 5.4 hours of sunshine per day on average.
Gretna Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Gretna - and find the best time to visit.
Monthly Temperature in Gretna
Visitors to Gretna can expect significant temperature changes throughout the year. Typically, average maximum daytime temperatures range from a pleasant 20°C (68°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 2°C (36°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Gretna
Gretna is known for its substantial rain/snowfall, with annual precipitation reaching 1086 mm (43 in). Precipitation levels in Gretna remain relatively steady throughout the year. December has the most rain, with 107 mm (4.2 in) over 19 days. In the driest month April, this drops slightly to 75 mm (3 in), making the city's climate fairly predictable. For more details, please visit our Gretna 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 Gretna
For those who appreciate different seasons, Gretna 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 (36 KM, 22 Miles).
Daily hours of sunshine
Data from: Eskdalemuir, the United Kingdom (36 KM, 22 Miles).
Daily percentage of sunshine
Data from: Eskdalemuir, the United Kingdom (36 KM, 22 Miles).
Humidity in Gretna 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 (36 KM, 22 Miles).
Best Time to Visit Gretna
The most comfortable overall weather for exploring Gretna is usually found in 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
cold
Mar
cold
Apr
mixed
May
good
Jun
very good
Jul
excellent
Aug
excellent
Sep
good
Oct
mixed
Nov
cold
Dec
wet
- Best overall: 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 Gretna
What is the best time to visit Gretna?
July and August typically offer the most optimal weather in Gretna. In contrast, January, February, March, November and December tend to have less optimal conditions. Gretna has pleasant summers and cold winters.
What temperatures can I expect in Gretna?
Daytime highs range from 8°C (46°F) in January to 20°C (68°F) in July. Nighttime lows range from 2°C (36°F) to 12°C (54°F). Temperatures vary considerably through the year.
How much rain does Gretna get?
Annual rainfall is around 1086 mm (43 in). December is the wettest month with 107 mm (4.2 in), while April is the driest with 75 mm (3 in).
How sunny is Gretna?
Gretna 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.
Gretna 3-Day Forecast
Gretna on the map
Gretna is highlighted - select any city to see its climate.
Popular in October
Where to go in October - average daytime high across popular destinations.
London
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15°C (59°F) Edinburgh13°C (55°F) Glasgow14°C (57°F) Bucket list
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