Climate Overview
The climate in Kastav is temperate. The average annual temperature is 12°C and approximately 1948mm of precipitation falls per year. Kastav receives a notable amount of rainfall throughout the year, including during its driest month. Kastav is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are January, December, February, when temperatures can drop to -1°C. Snowfall occurs from January to December, with around 82cm accumulating over the season.
Temperature
Temperatures in Kastav vary considerably across the year, with a 27°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 26°C and the mean temperature sits around 21°C. The coldest month is January, when overnight lows fall to -1°C and the daily average is 2°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between May and June, with a 6°C shift in average temperatures.
Precipitation
Kastav is a fairly wet location, receiving approximately 1948mm of precipitation annually, which averages out to around 162mm per month. The wettest month is November, averaging 237mm of rainfall. September and October also tend to see above-average precipitation. The driest month is June, with just 113mm. That's 124mm less than November, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 82cm accumulating over the season. February typically sees the most snow at around 22cm.
Wind
Kastav 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 March, averaging 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, 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.
Seasons
87 days until Winter
It is currently autumn in Kastav, which began on September 23, 2026. Kastav 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 August at around 26°C, while the coldest stretch bottoms out in January near -1°C. Winter is next, beginning on December 21, 2026 (87 days from now).
Spring
Temperatures range from 3 to 18°C. Rainfall is heavy, totalling around 469mm across the season with a monthly average of 156mm. Winds are generally light, averaging 9km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 15 to 26°C. Rainfall is heavy, totalling around 354mm across the season with a monthly average of 118mm. Winds are generally light, averaging 7km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.
Autumn
Temperatures range from 4 to 21°C. Rainfall is heavy, totalling around 670mm across the season with a monthly average of 223mm. Expect around 8cm of snow accumulation during this period. Winds are generally light, averaging 8km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -1 to 8°C. Rainfall is heavy, totalling around 455mm across the season with a monthly average of 152mm. Expect around 59cm of snow accumulation during this period. Winds are generally light, averaging 8km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.
Monthly Climate Data
The table below shows monthly climate averages for Kastav 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.
