Singapore records about 2340mm of rain across roughly 167 wet days a year, which is a 46% chance on an average day. December is the wettest month at 287mm (12% of the annual total) and July the driest at 159mm. Local rain type: thunderstorms. Essential year-round. Singapore's equatorial location means daily afternoon thunderstorms are normal. Always carry an umbrella — but rain rarely lasts more than 90 minutes.
Chance of rain on an average day: 46%
Rainfall climatology for Singapore. 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 | 2340mm |
| Rain days per year | 167 |
| Odds on an average day | 46% |
| Wettest month | December — 287mm over 20 days |
| Driest month | July — 159mm over 11 days |
| Rain type | thunderstorms |
| Best dry window | February and March tend to have the least rainfall, though showers remain possible daily. |
| Worst rain window | November through January brings the northeast monsoon with the heaviest and most prolonged rainfall. |
December delivers 81% more rain than July (287mm vs 159mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 12% of the annual total, so rain in Singapore is spread through the year — there is no season you can rely on being dry.
Singapore rain arrives in short, heavy bursts — shelter and timing matter more than gear.
Rain falls on about 20 days in December against 11 in July — 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 | 234mm | 17 | 57% | 32°C |
| February | 162mm | 12 | 40% | 32°C |
| March | 185mm | 13 | 43% | 32°C |
| April | 188mm | 13 | 43% | 31°C |
| May | 173mm | 12 | 40% | 31°C |
| June | 162mm | 12 | 40% | 30°C |
| July | 159mm | 11 | 37% | 30°C |
| August | 176mm | 13 | 43% | 30°C |
| September | 170mm | 12 | 40% | 30°C |
| October | 194mm | 14 | 47% | 31°C |
| November | 256mm | 18 | 60% | 31°C |
| December | 287mm | 20 | 67% | 32°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Singapore 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.
Singapore records rain on roughly 167 days a year — about a 46% chance on any given day — totalling around 2340mm.
December, with about 287mm over 20 rain days. That is 12% of the entire year's rainfall in a single month.
July is the driest month at 159mm across roughly 11 days. February and March tend to have the least rainfall, though showers remain possible daily.
Essential year-round. Singapore's equatorial location means daily afternoon thunderstorms are normal. Always carry an umbrella — but rain rarely lasts more than 90 minutes.
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.