Climate Insights for Sisak

The climate in Sisak is temperate. The average annual temperature is 13°C and approximately 896mm of precipitation falls per year. Sisak receives a notable amount of rainfall throughout the year, including during its driest month. Sisak is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, December, February, when temperatures can drop to -1°C. Light snow can occur between January and December.

Temperatures in Sisak vary considerably across the year, with a 31°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 30°C and the mean temperature sits around 24°C. The coldest month is January, when overnight lows fall to -1°C and the daily average is 2°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between May and June, with a 6°C shift in average temperatures.

Sisak is a moderately rainy area, receiving approximately 896mm of precipitation annually, which averages out to around 75mm per month. The wettest month is May, averaging 104mm of rainfall. November and September also tend to see above-average precipitation. The driest month is February, with just 61mm. That's 43mm less than May, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Light snowfall can occur between January and December, totalling around 48cm annually. January is the snowiest month with approximately 18cm.

Sisak is relatively calm, with an average annual wind speed of 8km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

It is currently autumn in Sisak, which began on September 23, 2026. Sisak is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 30°C, while the coldest stretch bottoms out in January near -1°C. Winter is next, beginning on December 21, 2026 (88 days from now).

The best time to visit Sisak is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 76mm per month. By contrast, January can be quite cold with temperatures dropping to -1°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Sisak based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.