| Month | Mean, °C | Mean max, °C | Mean min, °C | Rain, mm | Rain days | Humidity, % |
|---|---|---|---|---|---|---|
| January | 26.5 | 30.6 | 23.5 | 16.3 | 2.5 | 74 |
| February | 27.3 | 31.2 | 24.5 | 19.9 | 2.5 | 76 |
| March | 28.3 | 32.0 | 25.5 | 47.3 | 4.8 | 78 |
| April | 29.4 | 33.0 | 26.4 | 67.9 | 6.3 | 77 |
| May | 29.4 | 32.7 | 26.6 | 121.1 | 11.0 | 78 |
| June | 29.0 | 32.0 | 26.4 | 132.1 | 12.6 | 77 |
| July | 28.6 | 31.6 | 26.2 | 103.6 | 12.7 | 78 |
| August | 28.5 | 31.4 | 26.1 | 91.2 | 12.9 | 78 |
| September | 27.9 | 31.1 | 25.4 | 213.6 | 16.3 | 81 |
| October | 27.2 | 30.9 | 24.7 | 224.5 | 17.0 | 83 |
| November | 27.1 | 30.8 | 24.3 | 56.6 | 5.6 | 75 |
| December | 26.4 | 30.2 | 23.3 | 11.7 | 1.9 | 70 |
| Year | 28.0 | 31.5 | 25.2 | 1,105.8 | 106.1 | 77 |
The table above is a climate normal: averages over 30 years, not a forecast for any given year. A single year can be drier or wetter. For planning a trip or a move, the normal is more useful than last year’s weather: it shows what to expect in a typical month.
What the numbers show
Warm all year, with a mild winter. The monthly mean moves by only 3 degrees: from 26.4 °C in December to 29.4 °C in April and May. Nights are coolest in December and January, with average lows of 23.3 and 23.5 °C. The lowest temperature recorded at the station in 1991-2020 was 14.6 °C, in December.
Rain comes in two steps. From May to August 91-132 mm falls each month. In September and October rainfall roughly doubles, to 213.6 and 224.5 mm, with 16-17 rain days. In November it drops to 56.6 mm and in December to 11.7 mm. Mind the method: TMD counts a rain day whenever at least 0.1 mm falls, so short showers count too.
Pattaya is drier than the Andaman coast. The station gets 1,105.8 mm a year, less than half of the 2,271.5 mm at Phuket town in the same TMD report. Monthly figures for Phuket are on the Phuket weather page.
Sunshine follows the rain. 2,119.7 hours a year in total. January is the sunniest month (236.2 hours), September and August the least sunny (118.3 and 119.5 hours). Humidity ranges from 70% in December to 83% in October.
Pattaya weather by season
Our grouping of the monthly TMD figures in the table above (Phatthaya station, 1991-2020).
| Period | Months | Mean max, °C | Rain a month, mm | Rain days a month | Humidity, % |
|---|---|---|---|---|---|
| Dry | December-February | 30.2-31.2 | 11.7-19.9 | 1.9-2.5 | 70-76 |
| Hot, first showers | March-April | 32.0-33.0 | 47.3-67.9 | 4.8-6.3 | 77-78 |
| Rainy, moderate | May-August | 31.4-32.7 | 91.2-132.1 | 11.0-12.9 | 77-78 |
| Wettest | September-October | 30.9-31.1 | 213.6-224.5 | 16.3-17.0 | 81-83 |
| Transition | November | 30.8 | 56.6 | 5.6 | 75 |
The sea, things to do and hotel occupancy as the seasons change are in Pattaya in November and Pattaya in October. The same months across the country: Thailand in November and Thailand in December.
Today’s forecast and warnings from TMD
The normals show a typical month, not the coming week. For the next seven days use the TMD 7-day forecast, which is given by region. Heavy rain and storm warnings are on the TMD warnings page.
Method and limits
- Source: Thai Meteorological Department report Climatological Data of Thailand for 30 Year Period (1991-2020), 2023 edition, printed page 60 (Phatthaya, WMO 48 461). The report is published on a TMD subdomain
- Station: 12°55’ N, 100°52’ E, 59 m above sea level. TMD spells the name Phatthaya
- Period: 30 years, 1991-2020, the latest 30-year period for which TMD has published normals
- How we compiled it: figures copied from the report without recalculation. We checked monthly rainfall and rain days against the annual values and found no discrepancies
- Rain day: at least 0.1 mm in 24 hours, counted from 07:00 to 07:00
- What is missing: sea temperature, waves and water clarity. The report covers the weather station only, and we found no primary normals for the sea off Pattaya
- Next update: when TMD publishes new normals or at our April 2027 review
Getting there: Bangkok to Pattaya. Beaches and areas: Pattaya beaches.
Related: Pattaya travel guide.
FAQ
What is the best month for weather in Pattaya?
By the TMD normals, December to February: the driest months, with 11.7-19.9 mm of rain and 1.9-2.5 rain days, and highs of 30.2-31.2 °C. December is the driest and least humid month (11.7 mm, 70%), January the sunniest (236.2 hours of sunshine). The normals do not cover the sea, waves or water temperature.
When is the rainy season in Pattaya?
On the 1991-2020 normals, rain picks up in May (121.1 mm, 11.0 rain days) and peaks in September and October (213.6 and 224.5 mm, 16.3 and 17.0 rain days). June to August are wetter than the dry season but lighter than autumn: 91.2-132.1 mm a month. In November rainfall drops to 56.6 mm.
When is the dry season in Pattaya?
December to February: 11.7-19.9 mm a month and 1.9-2.5 rain days on average. March and April are still fairly dry (47.3 and 67.9 mm) but they are the hottest months. From May each month gets over 90 mm.
What is the hottest month in Pattaya?
April: a mean of 29.4 °C and an average high of 33.0 °C. May has the same mean, 29.4 °C, with highs of 32.7 °C. The highest temperature recorded at the station over 1991-2020, 38.7 °C, was in October.
What is the coolest month in Pattaya?
December: a mean of 26.4 °C and an average low of 23.3 °C. January is almost the same, 26.5 °C. The lowest temperature recorded at the station over 1991-2020 was 14.6 °C, also in December.
What is the weather like in Pattaya in November?
November is when the rains end: 56.6 mm and 5.6 rain days on average, a quarter of October's 224.5 mm. Highs are 30.8 °C, lows 24.3 °C, humidity 75%. December is drier still, with 11.7 mm.
What is the weather like in Pattaya in December?
December is the driest month of the year: 11.7 mm of rain and 1.9 rain days, humidity 70%. It is also the coolest, with a mean of 26.4 °C, highs of 30.2 °C and 215.8 hours of sunshine.
How many rainy days does Pattaya have a year?
On average 106.1 (TMD 1991-2020), counting every day with at least 0.1 mm. That is fewer than in Phuket town, where the same report gives 174.9. Most of Pattaya's rain days fall from May to October, when each month has 11.0 to 17.0.
Sources
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