Jakarta records about 1813mm of rain across roughly 141 wet days a year, which is a 39% chance on an average day. February is the wettest month at 300mm (17% of the annual total) and September the driest at 28mm. Local rain type: monsoon. Jakarta's wet season (November-March) brings extreme flooding risk. Dry season (May-September) is much more manageable for visitors.
Chance of rain on an average day: 39%
Rainfall climatology for Jakarta. The live hour-by-hour answer for today loads at the top of this page from Open-Meteo and refreshes through the day — the figures below describe a typical year, not today.
Last updated: · Live forecast data refreshes hourly.
| Annual rainfall | 1813mm |
| Rain days per year | 141 |
| Odds on an average day | 39% |
| Wettest month | February — 300mm over 24 days |
| Driest month | September — 28mm over 2 days |
| Rain type | monsoon |
| Best dry window | June through September is the dry season — significantly less rain and more comfortable for sightseeing. |
| Worst rain window | January and February bring the heaviest rain with serious urban flooding risks. |
February delivers 971% more rain than September (300mm vs 28mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 17% of the annual total, so rain in Jakarta is spread through the year — there is no season you can rely on being dry.
Jakarta rain arrives in short, heavy bursts — shelter and timing matter more than gear.
Rain falls on about 24 days in February against 2 in September — the frequency swing matters more for planning than the millimetre totals.
Climate normals. Use them to judge whether today's live forecast at the top of the page is typical or unusual for the season.
| Month | Rainfall | Rain days | Chance on a given day | Highs |
|---|---|---|---|---|
| January | 300mm | 24 | 80% | 33°C |
| February | 300mm | 24 | 80% | 33°C |
| March | 211mm | 17 | 57% | 33°C |
| April | 147mm | 12 | 40% | 32°C |
| May | 113mm | 9 | 30% | 31°C |
| June | 97mm | 8 | 27% | 30°C |
| July | 64mm | 5 | 17% | 30°C |
| August | 43mm | 3 | 10% | 30°C |
| September | 28mm | 2 | 7% | 30°C |
| October | 112mm | 9 | 30% | 31°C |
| November | 142mm | 11 | 37% | 32°C |
| December | 203mm | 16 | 53% | 33°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Jakarta we combine the hourly probability curve, expected volume in millimetres, and the city's own rainfall record into a single umbrella verdict.
| Factor | Weight | What it measures |
|---|---|---|
| Hourly probability | 40% | Peak and sustained chance of measurable rain across the next 24 hours. |
| Expected volume | 30% | Total millimetres, which separates a passing shower from a genuine soaking. |
| Timing & duration | 20% | When rain starts, when it eases, and the longest continuous dry window. |
| Local rain type | 10% | Drizzle, brief showers, thunderstorms or monsoon — each needs different gear. |
Live hourly values come from Open-Meteo and refresh through the day. Monthly rainfall figures are climate normals, so they describe a typical year rather than a forecast.
Jakarta records rain on roughly 141 days a year — about a 39% chance on any given day — totalling around 1813mm.
February, with about 300mm over 24 rain days. That is 17% of the entire year's rainfall in a single month.
September is the driest month at 28mm across roughly 2 days. June through September is the dry season — significantly less rain and more comfortable for sightseeing.
Jakarta's wet season (November-March) brings extreme flooding risk. Dry season (May-September) is much more manageable for visitors.
No. Probability is the chance that at least 0.2mm of rain falls at your location at some point in the period. Check the expected millimetres alongside it: 40% with 0.4mm is a passing shower, 40% with 12mm is a soaking.