São Paulo records about 1441mm of rain across roughly 120 wet days a year, which is a 33% chance on an average day. January is the wettest month at 240mm (17% of the annual total) and July the driest at 28mm. Local rain type: thunderstorms. São Paulo gets intense summer thunderstorms that can cause flash flooding. The massive metro system provides rain-proof transit across the city.
Chance of rain on an average day: 33%
Rainfall climatology for São Paulo. 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 | 1441mm |
| Rain days per year | 120 |
| Odds on an average day | 33% |
| Wettest month | January — 240mm over 20 days |
| Driest month | July — 28mm over 2 days |
| Rain type | thunderstorms |
| Best dry window | June through August offers dry, mild winter weather — the most comfortable months for outdoor exploration. |
| Worst rain window | January and February bring extreme tropical downpours that can flood low-lying neighborhoods. |
January delivers 757% more rain than July (240mm 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 São Paulo is spread through the year — there is no season you can rely on being dry.
São Paulo rain arrives in short, heavy bursts — shelter and timing matter more than gear.
Rain falls on about 20 days in January against 2 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 | 240mm | 20 | 67% | 28°C |
| February | 217mm | 18 | 60% | 28°C |
| March | 160mm | 13 | 43% | 27°C |
| April | 76mm | 6 | 20% | 26°C |
| May | 74mm | 6 | 20% | 24°C |
| June | 56mm | 5 | 17% | 23°C |
| July | 28mm | 2 | 7% | 22°C |
| August | 38mm | 3 | 10% | 22°C |
| September | 80mm | 7 | 23% | 23°C |
| October | 124mm | 10 | 33% | 24°C |
| November | 146mm | 12 | 40% | 26°C |
| December | 201mm | 17 | 57% | 27°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For São Paulo 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.
São Paulo records rain on roughly 120 days a year — about a 33% chance on any given day — totalling around 1441mm.
January, with about 240mm over 20 rain days. That is 17% of the entire year's rainfall in a single month.
July is the driest month at 28mm across roughly 2 days. June through August offers dry, mild winter weather — the most comfortable months for outdoor exploration.
São Paulo gets intense summer thunderstorms that can cause flash flooding. The massive metro system provides rain-proof transit across the city.
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.