Phuket records about 2220mm of rain across roughly 134 wet days a year, which is a 37% chance on an average day. September is the wettest month at 388mm (17% of the annual total) and February the driest at 31mm. Local rain type: monsoon. Essential from May through November — monsoon season brings heavy, sustained rain. Dry season (December-April) is mostly rain-free with calm, warm seas.
Chance of rain on an average day: 37%
Rainfall climatology for Phuket. 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 | 2220mm |
| Rain days per year | 134 |
| Odds on an average day | 37% |
| Wettest month | September — 388mm over 23 days |
| Driest month | February — 31mm over 2 days |
| Rain type | monsoon |
| Best dry window | December through March offers the best weather — dry, warm, with calm seas perfect for island hopping. |
| Worst rain window | September brings the heaviest monsoon rain with rough seas. Some smaller islands close boat services entirely. |
September delivers 1152% more rain than February (388mm vs 31mm). 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 Phuket is spread through the year — there is no season you can rely on being dry.
Phuket rain arrives in short, heavy bursts — shelter and timing matter more than gear.
Rain falls on about 23 days in September against 2 in February — 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 | 35mm | 2 | 7% | 31°C |
| February | 31mm | 2 | 7% | 31°C |
| March | 69mm | 4 | 13% | 31°C |
| April | 135mm | 8 | 27% | 32°C |
| May | 280mm | 16 | 53% | 32°C |
| June | 263mm | 15 | 50% | 33°C |
| July | 264mm | 16 | 53% | 33°C |
| August | 265mm | 16 | 53% | 33°C |
| September | 388mm | 23 | 77% | 33°C |
| October | 305mm | 18 | 60% | 32°C |
| November | 177mm | 10 | 33% | 32°C |
| December | 62mm | 4 | 13% | 31°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Phuket 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.
Phuket records rain on roughly 134 days a year — about a 37% chance on any given day — totalling around 2220mm.
September, with about 388mm over 23 rain days. That is 17% of the entire year's rainfall in a single month.
February is the driest month at 31mm across roughly 2 days. December through March offers the best weather — dry, warm, with calm seas perfect for island hopping.
Essential from May through November — monsoon season brings heavy, sustained rain. Dry season (December-April) is mostly rain-free with calm, warm seas.
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.