Cilacap climate — normals and trends
Cilacap (Indonesia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.2 °C and it receives 2,632 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is April (26.8 °C on average) and the coldest is August (25.1 °C). Rainfall peaks in December.
Cilacap averages 0 frost days, 0 hot days (≥ 30 °C) and 301 rainy days per year.
Cilacap has warmed by +0.7 °C between 1940 and 2025, or +0.09 °C per decade. This trend is statistically significant.
The hottest day of the period reached 31.1 °C (on 25 February 1992) and the coldest 21.4 °C (on 23 July 1965).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
CilacapCentral Java
- coords
- -7.73°, 109.01°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.2°C
Average daily high
27.2°C
Average daily low
25.2°C
Annual rainfall
2,632mm
Sunshine / day
10.3h
Mean relative humidity
83%
Average peak wind
18.6km/h
Seasonal range
1.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
301 d/yr
Annual snowfall
0.0 cm
Average feels-like high
31.7 °C
Average feels-like low
28.7 °C
Average peak gust
27.0 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
18.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.7 °C
since 1940
+0.1 °C per decade · r² = 0.34 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
31.1 °C
25 February 1992
Coldest day
21.4 °C
23 July 1965
Wettest day
261 mm
5 November 2007
Windiest day
43.5 km/h
22 February 1949
Strongest gust
64.8 km/h
24 December 1993
Hottest feels-like
38.0 °C
13 February 1998
Coldest feels-like
21.9 °C
27 July 1994
Sunniest day
12.4 h
28 November 2019
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 28.2 °C | +0.6 °C | 386 mm | +83 mm |
| Feb | 28.6 °C | +0.9 °C | 244 mm | +6 mm |
| Mar | 28.7 °C | +0.9 °C | 159 mm | -88 mm |
| Apr | 28.5 °C | +0.5 °C | 240 mm | +52 mm |
| May | 28.3 °C | +0.4 °C | 461 mm | +273 mm |
| Jun | 28.2 °C | +0.8 °C | 176 mm | +14 mm |
| Jul | 27.2 °C | +0.5 °C | 124 mm | -17 mm |
| Aug | 27.2 °C | +1.1 °C | 221 mm | +116 mm |
| Sep | 27.2 °C | +1.1 °C | 200 mm | +67 mm |
| Oct | 27.6 °C | +0.9 °C | 485 mm | +245 mm |
| Nov | 27.7 °C | +0.5 °C | 612 mm | +275 mm |
| Dec | 28.2 °C | +0.7 °C | 199 mm | -151 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Cilacap?
Cilacap has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.2 °C and it receives 2,632 mm of precipitation per year.
What is the hottest day ever recorded in Cilacap?
The hottest day measured in Cilacap between 1940 and 2025 was 25 February 1992, reaching 31.1 °C.
What is the coldest day in Cilacap?
The coldest day measured in Cilacap between 1940 and 2025 was 23 July 1965, at 21.4 °C.
Does it snow in Cilacap?
Almost never: Cilacap sees virtually no snow, with about 0 frost days per year.
Has the climate of Cilacap warmed?
Yes: Cilacap warmed by +0.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Cilacap?
The wettest day measured in Cilacap between 1940 and 2025 was 5 November 2007, with 261 mm of rain in 24 hours.
What was the windiest day in Cilacap?
The windiest day measured in Cilacap between 1940 and 2025 was 22 February 1949, with winds reaching 43.5 km/h.
What is the warmest month in Cilacap?
The warmest month in Cilacap is April (26.8 °C on average); the coldest is August (25.1 °C).
How much does it rain in Cilacap?
Cilacap receives on average 2,632 mm of precipitation per year, spread over about 301 rainy days.
Is it sunny in Cilacap?
Cilacap gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.
Are there tropical nights in Cilacap?
Yes: Cilacap has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Cilacap?
In Cilacap, between 1940 and 2025, the highest apparent temperature reached 38.0 °C on 13 February 1998, and the lowest was 21.9 °C on 27 July 1994.
Compare Cilacap with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Cilacap