Celje Temperature by Month
Celje, Savinjska, Slovenia has an average annual maximum temperature of 16°C (61°F), ranging from 5°C (41°F) in January to 27°C (81°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Celje Monthly Temperatures
The weather in Celje experiences significant differences between warm and cold seasons, with big shifts in temperature. At night, minimum temperatures range from 15°C (59°F) in July to -3°C (27°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Celje 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. July, the city's warmest month, averages 278 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Celje vs Slovenia
The map below shows the annual temperature across Slovenia. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Celje vs World: Temperature Compared
Celje's average annual maximum temperature is 16°C (61°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.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
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 Celje this rarely lasts long on the ground.
For more on Celje's weather — including monthly rainfall, sunshine hours, and humidity — visit our Celje climate page.
