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Portland Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Portland.
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Climate overview of Portland
Temperatures in Portland, Dorset, United Kingdom, shift moderately through the seasons. The warmest month is August at 20°C (68°F), and the coolest is February at 10°C (50°F).
Portland sees a moderate amount of rainfall, totalling around 967 mm (38 in) per year. It experiences pleasant summers and cold winters, creating some seasonal variation. Sunshine peaks in July, when the city sees around 7.5 hours of sunshine per day.
Portland Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Portland - and find the best time to visit.
Monthly Temperature in Portland
The climate in Portland experiences moderate temperature changes, with mild shifts between seasons. Average maximum daytime temperatures range from a pleasant 20°C (68°F) in August, the warmest time of the year, to a chilly 10°C (50°F) during cooler months like February.
At night, you can expect temperatures ranging from 15°C (59°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 Portland
Generally, Portland receives mid-range precipitation levels, with 967 mm (38 in) annually. While rainfall varies throughout the year, each season offers its own charm. November brings wetter days averaging 118 mm (4.6 in) of precipitation, spread over 16 rainy days.
In contrast, the driest month July experiences a drier climate, with about 54 mm (2.1 in) of rainfall spread across 10 rainy days. For more details, please visit our Portland 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 Portland
Seasonal changes in sunshine hours are quite dramatic in Portland. While July receives considerable daily sunshine with up to 7.5 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.8 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Salisbury, the United Kingdom (74 KM, 46 Miles).
Daily hours of sunshine
Data from: Salisbury, the United Kingdom (74 KM, 46 Miles).
Best Time to Visit Portland
The most comfortable overall weather for exploring Portland is usually found in August. Conditions are generally least comfortable in January, February, 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
cold
Feb
cold
Mar
mixed
Apr
mixed
May
good
Jun
good
Jul
very good
Aug
excellent
Sep
very good
Oct
mixed
Nov
wet
Dec
wet
- Best overall: August
- Warmest weather: July, August and September
- Most sunshine: July
- Fewest rainy days: June, July and August
- Seasonal pattern: Pleasant summers and cold winters
Frequently asked questions about the climate in Portland
What is the best time to visit Portland?
August typically offers the most optimal weather in Portland. In contrast, January, February, November and December tend to have less optimal conditions. Portland has pleasant summers and cold winters.
What temperatures can I expect in Portland?
Daytime highs range from 10°C (50°F) in February to 20°C (68°F) in August. Nighttime lows range from 5°C (41°F) to 15°C (59°F).
How much rain does Portland get?
Annual rainfall is around 967 mm (38 in). November is the wettest month with 118 mm (4.6 in), while July is the driest with 54 mm (2.1 in).
How sunny is Portland?
Portland receives around 1,674 hours of sunshine per year. July is the sunniest month with 225 hours, while December is the cloudiest with just 55 hours.
Portland 3-Day Forecast
Portland on the map
Portland is highlighted - select any city to see its climate.
Popular in September
Where to go in September - average daytime high across popular destinations.
London
20°C (68°F) Bath19°C (66°F) Torquay19°C (66°F) Manchester
18°C (64°F) York19°C (66°F) Edinburgh17°C (63°F) Blackpool17°C (63°F) Glasgow17°C (63°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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