Climate Overview
The climate in Cilacap is cold. The average annual temperature is -6°C and approximately 343mm of precipitation falls per year. December is the wettest month, receiving around 33mm of rainfall. Cilacap sits near the equator, so seasonal temperature differences are minimal throughout the year. Cilacap experiences heavy snowfall, typically from February through December.
Temperature
Temperatures in Cilacap vary considerably across the year, with a 23°C difference between the coldest and warmest months. January is the warmest month, though highs remain moderate at 1°C with a mean of 0°C. July brings the harshest conditions, with lows dropping to -22°C and an average temperature of -19°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between July and August, with a 11°C shift in average temperatures.
Precipitation
Cilacap is a quite dry location, receiving approximately 343mm of precipitation annually, which averages out to around 29mm per month. The wettest month is January, averaging 33mm of rainfall. February and March also tend to see above-average precipitation. The driest month is July, with just 11mm. That's 22mm less than January, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall. Cilacap receives heavy snowfall, accumulating around 288cm annually from February through December. The snowiest month is March, with approximately 33cm. Winter travel should account for significant snow cover.
Wind
Cilacap is relatively calm, with an average annual wind speed of 9km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in January, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 6km/h gap between the calmest and windiest months.
Seasons
23 days until Spring
It is currently winter in Cilacap, which began on June 21, 2026. Cilacap sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in January at around 1°C, while the coldest stretch bottoms out in July near -22°C. Spring is next, beginning on September 23, 2026 — 23 days from now.
Spring
Temperatures range from -5 to -3°C. Rainfall is relatively light, with around 72mm over the season and a monthly average of 24mm. Winds are generally light, averaging 10km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from -3 to 1°C. Rainfall is relatively light, with around 98mm over the season and a monthly average of 33mm. Winds are generally light, averaging 9km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from -17 to 0°C. Rainfall is relatively light, with around 98mm over the season and a monthly average of 33mm. Expect around 98cm of snow accumulation during this period. Winds are generally light, averaging 9km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from -22 to -6°C. Rainfall is relatively light, with around 74mm over the season and a monthly average of 25mm. Expect around 74cm of snow accumulation during this period. Winds are generally light, averaging 9km/h. Heavy layering and insulated outerwear are essential — exposed skin should be minimised outdoors.
Monthly Climate Data
The table below shows monthly climate averages for Cilacap 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.
