Mostar Temperature by Month
Mostar, Sarajevo Canton, Bosnia and Herzegovina has an average annual maximum temperature of 18°C (64°F), ranging from 7°C (45°F) in January to 29°C (84°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Mostar Monthly Temperatures
Visitors to Mostar will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures range from 16°C (61°F) in August to -2°C (28°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Mostar by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. August, the warmest month, gets 304 hours of sunshine.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
49-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in July
Historical Mostar Temperatures: 1976-2026
Browse day-by-day temperature records for Mostar spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Mostar vs Bosnia and Herzegovina
The map below shows the annual temperature across Bosnia and Herzegovina. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Mostar vs World: Temperature Compared
Mostar's average annual maximum temperature is 18°C (64°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.
Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
What Does the Temperature Feel Like in Mostar?
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 Mostar, January is the coolest month, with average highs of 7°C (45°F) and humidity around 65% — considered high. In August, the warmest month, temperatures average 29°C (84°F) with 54% humidity — conditions that feel moderate. 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.
Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.
Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.
For more on Mostar's weather — including monthly rainfall, sunshine hours, and humidity — visit our Mostar climate page.
