Climate Overview
The climate in Cilacap is hot. The average annual temperature is 27°C and approximately 2520mm of precipitation falls per year. Cilacap receives a notable amount of rainfall throughout the year, including during its driest month. Cilacap sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Cilacap has relatively stable temperatures year-round, staying within a 6°C range. The warmest month is April, when average highs reach 30°C and the mean temperature sits around 28°C. August is the coolest month, with minimum temperatures around 24°C and an average of 26°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows.
Precipitation
Cilacap is a very wet location, receiving approximately 2520mm of precipitation annually, which averages out to around 210mm per month. The wettest month is December, averaging 371mm of rainfall. November and January also tend to see above-average precipitation. The driest month is August, with just 41mm. That's 330mm less than December, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
Cilacap is mildly breezy, with an average annual wind speed of 16km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 20km/h, though still comfortable for most outdoor activities. The calmest conditions occur in April, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 8km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 18km/h in winter, 16km/h in spring, 15km/h in summer, 13km/h in autumn.
Seasons
89 days until Winter
It is currently autumn in Cilacap, which began on March 20, 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 April at around 30°C, while the coldest stretch bottoms out in August near 24°C. Winter is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 24 to 29°C. Rainfall is heavy, totalling around 658mm across the season with a monthly average of 219mm. Winds are moderate at around 16km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 26 to 29°C. Rainfall is heavy, totalling around 972mm across the season with a monthly average of 324mm. Winds are generally light, averaging 15km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 26 to 30°C. Rainfall is heavy, totalling around 662mm across the season with a monthly average of 221mm. Winds are generally light, averaging 13km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 24 to 29°C. Precipitation is moderate at around 227mm for the season, averaging 76mm per month. Winds are moderate at around 18km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
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. 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.
