Sils Temperature by Month
Sils in Catalonia, Spain sees significant seasonal temperature differences, with daytime highs between 14°C (57°F) in January and 30°C (86°F) in August, averaging 21°C (70°F) annually. Explore the full monthly breakdown below.
Sils Monthly Temperatures
Depending on the time of the year, temperatures range from warm to mild in Sils. Nighttime lows follow the same pattern, ranging from 19°C (66°F) to 3°C (37°F).
The chart below illustrates the average maximum day and minimum night temperatures in Sils by month:
The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. August, the city's warmest month, averages 262 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Sils vs Spain
The map below shows the annual temperature across Spain. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Sils vs World: Temperature Compared
Sils's average annual maximum temperature is 21°C (70°F). To put that in context, here's how it compares to a few well-known destinations:
Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.
On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.
Beijing, China averages 20°C (68°F) annually, but with big seasonal swings — very cold winters and hot 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 Sils?
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 Sils, January is the coolest month, with average highs of 14°C (57°F) and humidity around 74% — considered high. In August, the warmest month, temperatures average 30°C (86°F) with 66% humidity — conditions that feel 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 Sils this rarely lasts long on the ground.
For more on Sils's weather — including monthly rainfall, sunshine hours, and humidity — visit our Sils climate page.
