Port William Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Port William.
Climate overview of Port William
Port William, Dumfries and Galloway, United Kingdom, has a moderate seasonal temperature range, with August reaching 17°C (63°F) and February cooling to 9°C (48°F).
Rainfall is high, totalling around 1369 mm (54 in) per year. November is the wettest month and May the driest.
Port William Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Port William - and find the best time to visit.
Monthly Temperature in Port William
The weather in Port William changes moderately throughout the year, offering enough variation to appreciate each season. Average maximum daytime temperatures range from a moderate 17°C (63°F) in August, the warmest time of the year, to a chilly 9°C (48°F) during cooler months like February.
At night, you can expect temperatures ranging from 13°C (55°F) in August to around 5°C (41°F) during February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Port William
Port William is known for its substantial rainfall, with annual precipitation reaching 1369 mm (54 in). While rainfall varies throughout the year, each season offers its own charm. November brings wetter days averaging 155 mm (6.1 in) of precipitation, spread over 20 rainy days.
In contrast, the driest month May experiences a drier climate, with about 76 mm (3 in) of rainfall spread across 15 rainy days. For more details, please visit our Port William Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Port William
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June and July
- Warmest weather: July, August and September
Frequently asked questions about the climate in Port William
What is the best time to visit Port William?
June and July typically offer the most optimal weather in Port William. In contrast, January, February, March, November and December tend to have less optimal conditions.
What temperatures can I expect in Port William?
Daytime highs range from 9°C (48°F) in February to 17°C (63°F) in August. Nighttime lows range from 5°C (41°F) to 13°C (55°F).
How much rain does Port William get?
Annual rainfall is around 1369 mm (54 in). November is the wettest month with 155 mm (6.1 in), while May is the driest with 76 mm (3 in).
Port William 3-Day Forecast
Port William 3-Day Forecast
Port William on the map
Port William is highlighted - select any city to see its climate.
Popular this month
Where to go in July - average daytime high across popular destinations.
London
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21°C (70°F) Edinburgh
19°C (66°F) Glasgow19°C (66°F) Torquay20°C (68°F) Blackpool19°C (66°F) 
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