Cilacap weather in April
In April, Cilacap has daytime highs averaging 28 °C, nights around 25 °C, with 26 wet days, and a sea temperature of 29 °C. Figures are 1991–2020 climate normals.
- 28.4°C Average high
- 24.7°C Average low
- 26days Wet days
- 248mm Rainfall
- 29.1°C Sea temperature
- 12h Daylight
Daily temperatures through April
How April develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 April | 28.3 °C | 24.7 °C | 93 % |
| 11–20 April | 28.4 °C | 24.7 °C | 89 % |
| 21–30 April | 28.4 °C | 24.8 °C | 82 % |
- Rain is most likely over days 1–10 of April (93 % of days) and least likely over days 21–30 (82 %).
What to expect
| Measure | Typical April | Share of the month |
|---|---|---|
| Days above 25 °C | 30 of 30 | 100 % |
| Days above 30 °C | 0.2 of 30 | 1 % |
| Days below 0 °C | 0 of 30 | 0 % |
| Days with more than 1 mm rain | 26 of 30 | 88 % |
Conditions in April
| Measure | Average |
|---|---|
| Mean temperature | 26 °C |
| Record high (1991–2020) | 31 °C |
| Record low (1991–2020) | 22 °C |
| Relative humidity | 85 % |
| Wind speed | 9.2 km/h |
| Cloud cover | 82 % |
April compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| February | 28.2 °C | 336 mm | 91 % |
| March | 28.3 °C | 329 mm | 87 % |
| April | 28.4 °C | 248 mm | 82 % |
| May | 28.3 °C | 154 mm | 68 % |
| June | 27.8 °C | 106 mm | 64 % |
See all twelve months for Cilacap
- April is the warmest month in Cilacap.
- It is the 7th driest month of the year.
- It ranks 7th for least cloud cover.
- Days last about 12 hours from sunrise to sunset.
- It rains on 26 of 30 days — 88 % of the month.
- Nights are about 3.6 °C cooler than the middle of the day.
- The hottest April day on record since 1991 reached 31 °C, 2.1 °C above the usual daytime high.
- Beach score: 69 / 100 — see how this is calculated.
QuestionsApril in Cilacap, answered
How warm is Cilacap in April?
Daily highs average 28 °C and nights fall to about 25 °C, a spread of 3.6 °C between afternoon and dawn. That makes April the 1st warmest month of the year here.
Does it rain much in Cilacap in April?
April averages 248 mm of rain, spread over about 26 of the 30 days — 88 % of the month. Cloud cover averages 82 % of the sky.
Is the sea warm enough to swim in April?
The sea averages 29 °C off Cilacap in April. Most people find water below 20 °C bracing and above 25 °C comfortable for a long swim; this figure is a monthly surface average, so a sheltered bay on a still afternoon can be warmer.
How long are the days in April?
Cilacap averages 12 hours between sunrise and sunset in April. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.