Glastonbury Temperature by Month
Glastonbury, Somerset, United Kingdom has an average annual maximum temperature of 15°C (59°F), ranging from 9°C (48°F) in January to 22°C (72°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Glastonbury Monthly Temperatures
Depending on the time of the year, temperatures range from pleasant to cold in Glastonbury. At night, minimum temperatures range from 13°C (55°F) in July to 3°C (37°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Glastonbury by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. July, the warmest month, averages 219 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Glastonbury 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
warm
pleasant
moderate
cold
very cold
Glastonbury vs World: Temperature Compared
Glastonbury's average annual maximum temperature is 15°C (59°F). To put that in context, here's how it compares to a few well-known destinations:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Queenstown, New Zealand averages 10°C (50°F) annually — remember seasons are flipped, so its coldest months fall in June and July.
Beijing, China averages 20°C (68°F) annually, but with big seasonal swings — very cold winters and hot summers.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
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 Glastonbury's weather — including monthly rainfall, sunshine hours, and humidity — visit our Glastonbury climate page.
