Denver is 2.3°C (4.1°F) warmer by day, London has 4.1°C (7.4°F) warmer nights, London gets 243 mm (9.6 in) more rain a year.
Denver is at its warmest in July and coolest in January, while London peaks in July and bottoms out in February. Month for month, London is the warmer of the two in 7 of 12 months.
London is the wetter of the two, collecting 705 mm (27.8 in) of rain a year against 462 mm (18.2 in) in Denver. The most comfortable time to visit is June, July and August in Denver and June, July and August in London.
| Denver | Metric | London |
|---|---|---|
| 🌡️ Temperature | ||
| 16.6°C | 🌡️Average daytime high | 14.3°C |
| 2.1°C | 🌙Average nighttime low | 6.2°C |
| July | 🔥Hottest month | July |
| January | ❄️Coldest month | February |
| 🌧️ Rain | ||
| 462 mm | 🌧️Annual rainfall | 705 mm |
| May | ☔Wettest month | October |
| January | 🏜️Driest month | April |
| 💨 Climate | ||
| 50% | 💧Average humidity | 85% |
| 2.5 m/s | 💨Average wind speed | 3.4 m/s |
Overnight, Denver typically falls to around 2.1°C (35.8°F) while London settles near 6.2°C (43.2°F).
Denver is hottest in July and coldest in January, whereas London peaks in July and is coolest in February.
Denver sees the most rain in May and the least in January; London is wettest in October and driest in April.
London feels the more humid of the two, averaging 85% relative humidity against 50%.
For London, the pick of the year is June, July and August.
Month by month, here is the coldest night, the average day and the hottest afternoon each city can expect. Switch Compare to read rainfall, humidity, wind or solar instead, and Period to move between the long-term 45-year average and any single year — the shading is a quick warm-to-cool guide.
| Month | Denver | London | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | -6.9 | -1❄️ | 4.8 | 1.3 | 4❄️ | 6.7 |
| February | -6.4 | -0.1 | 6.2 | 1.2 | 4.4 | 7.5 |
| March | -3.7 | 3.3 | 10.4 | 2.5 | 6.5 | 10.4 |
| April | -0.8 | 7 | 14.7 | 4 | 8.7 | 13.3 |
| May | 4.5 | 12.4 | 20.4 | 7.1 | 11.9 | 16.7 |
| June | 10.4 | 18.8 | 27.3 | 10 | 14.9 | 19.9 |
| July | 14.1 | 22🔥 | 29.8 | 12.3 | 17.4🔥 | 22.4 |
| August | 13.3 | 20.8 | 28.3 | 12.3 | 17.3 | 22.4 |
| September | 8.6 | 16.6 | 24.6 | 10.1 | 14.8 | 19.5 |
| October | 1.9 | 9.7 | 17.4 | 7.5 | 11.3 | 15.1 |
| November | -3.2 | 3.5 | 10.2 | 4.3 | 7.2 | 10.2 |
| December | -6.6 | -0.8 | 4.9 | 2.4 | 4.9 | 7.3 |
| Annual Avg | 2.1 | 9.4 | 16.6 | 6.3 | 10.3 | 14.3 |
Min / mean / max temperature (°C). 🔥 marks each city's hottest month, ❄️ its coldest; shading runs cool blue to warm red.
The same figures plotted out, so the shape of a typical year is easier to see than in a grid. Where the two lines run close together Denver and London feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Denver London
See how Denver and London stack up against other cities. Swipe for more.
Choose which city to keep, then search for any other city in our database — we'll build the comparison for you.
Quick answers to the questions people ask most when comparing Denver and London — each drawn straight from the climate figures above.
Denver is the warmer of the two. It averages daytime highs of 16.6°C (61.9°F) against 14.3°C (57.7°F) in London — roughly 2.3°C (4.1°F) warmer by day. Nights are milder in London, with average lows of 6.2°C (43.2°F) versus 2.1°C (35.8°F).
Denver is hottest in July, averaging highs of about 29.8°C (85.6°F), while London peaks in July at around 22.4°C (72.4°F). That makes Denver the hotter of the two at the height of summer.
Denver gets colder. In its coldest month (January) overnight lows average about -6.9°C (19.7°F), compared with 1.2°C (34.2°F) at the low point of the year in London.
London is the wetter city, collecting about 705 mm (27.8 in) of rain a year versus 462 mm (18.2 in) in Denver. Denver is wettest in May and driest in January; London is wettest in October and driest in April.
London is the more humid of the two, averaging 85% relative humidity over the year against 50% in Denver.
The most comfortable months in Denver are June, July and August, when average temperatures are at their mildest.
London is at its most pleasant around June, July and August, based on the mildest average temperatures of the year.
London is the warmer city in 7 of the 12 months of the year. The gap is widest in December, about 5.7°C (10.3°F), and narrowest in May, about 0.5°C (0.9°F).
Denver has the bigger seasonal swing, about 23°C (41.4°F) between its coldest and hottest months versus 13.4°C (24.1°F) in London — so London has the steadier, more even climate.
On climate alone, Denver comes out ahead — it offers warmer days, less rain and lower humidity than London. London is the better fit only if you'd actually prefer cooler weather, more rainfall and a more humid climate.
Every figure on this page is calculated from NASA POWER satellite climate data spanning 1981–2025 (45 years). The averages describe the long-term climate of Denver and London, not a single year's weather or a short-range forecast.
