Dartmouth Temperature by Month
Dartmouth, Devon, United Kingdom has an average annual maximum temperature of 14°C (57°F), with moderate seasonal shifts ranging from 10°C (50°F) in February to 20°C (68°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Dartmouth Monthly Temperatures
The moderate changes in the climate in Dartmouth ensure gradual weather shifts through each season. At night, temperatures drop to between 15°C (59°F) and 5°C (41°F) depending on the time of year.
The chart below illustrates the average maximum day and minimum night temperatures in Dartmouth by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. August, the warmest month, averages 205 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Dartmouth vs the United Kingdom
The map below shows the annual temperature across the United Kingdom. You can also select individual months if you want to compare a specific time of year.
very warm
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pleasant
moderate
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Dartmouth vs World: Temperature Compared
Dartmouth's average annual maximum temperature is 14°C (57°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
What Does the Temperature Feel Like in Dartmouth?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.
In Dartmouth, February is the coolest month, with average highs of 10°C (50°F) and humidity around 84% — considered very high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round — large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.
For more on Dartmouth's weather — including monthly rainfall, sunshine hours, and humidity — visit our Dartmouth climate page.
