Hounslow Temperature by Month
Hounslow in Greater London, United Kingdom sees significant seasonal temperature differences, with daytime highs between 9°C (48°F) in January and 23°C (73°F) in July, averaging 15°C (59°F) annually. Explore the full monthly breakdown below.
Hounslow Monthly Temperatures
With significant temperature fluctuations, Hounslow enjoys distinct seasons year-round. Nighttime lows range from 14°C (57°F) in July to 3°C (37°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Hounslow by month:
Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. July, the warmest month of the year, receives 219 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Hounslow 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.
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Hounslow vs World: Temperature Compared
Hounslow'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:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.
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.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
What Does the Temperature Feel Like in Hounslow?
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 Hounslow, January is the coolest month, with average highs of 9°C (48°F) and humidity around 80% — 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.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Hounslow this rarely lasts long on the ground.
For more on Hounslow's weather — including monthly rainfall, sunshine hours, and humidity — visit our Hounslow climate page.
