Samut Prakan climate
Samut Prakan (Thailand) has a tropical savanna (dry winter) climate (Köppen Aw). The average temperature over the year is 28 °C82 °F, and about 1,302 mm51 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Samut Prakan climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 3189 | 2271 | 2780 | 210.8 |
| Feb | 3391 | 2475 | 2883 | 160.6 |
| Mar | 3392 | 2578 | 2985 | 512.0 |
| Apr | 3493 | 2780 | 3086 | 722.8 |
| May | 3290 | 2780 | 3085 | 1526.0 |
| Jun | 3188 | 2679 | 2984 | 1526.0 |
| Jul | 3187 | 2678 | 2883 | 1526.0 |
| Aug | 3187 | 2578 | 2883 | 1556.1 |
| Sep | 3086 | 2578 | 2882 | 2519.9 |
| Oct | 3086 | 2577 | 2781 | 2218.7 |
| Nov | 3086 | 2374 | 2780 | 491.9 |
| Dec | 3086 | 2170 | 2678 | 100.4 |
| Year | 3493 | 2170 | 2882 | 1,30251 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 67% | 40% | 5.0 | 11:24 |
| Feb | 66% | 35% | 5.5 | 11:41 |
| Mar | 69% | 48% | 5.7 | 12:01 |
| Apr | 70% | 61% | 6.1 | 12:25 |
| May | 76% | 84% | 5.5 | 12:45 |
| Jun | 79% | 89% | 5.3 | 12:55 |
| Jul | 80% | 91% | 5.1 | 12:51 |
| Aug | 80% | 92% | 5.1 | 12:34 |
| Sep | 83% | 91% | 4.9 | 12:11 |
| Oct | 84% | 78% | 4.7 | 11:48 |
| Nov | 80% | 59% | 4.9 | 11:29 |
| Dec | 72% | 47% | 4.9 | 11:20 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Samut Prakan is like
The warmest month is April, with an average high of 34 °C93 °F and a low of 27 °C80 °F. The coldest is December, when highs average 30 °C86 °F and lows 21 °C70 °F. Seasonal differences are small — just 4.5 °C8.1 °F between the warmest and the coolest month.
It is wet, with about 1,302 mm51 in of precipitation per year. The wettest three-month stretch is August–October, which brings 48% of the annual total. Months with less than 20 mm0.8 in on average: February and December. The wettest month is September (251 mm9.9 in), the driest is December (10 mm0.4 in).
Relative humidity ranges from 66% in February to 84% in October. The clearest skies (lowest average cloud amount, 35%) are typical of February. Average wind speed near the ground ranges from 7 km/h (4 mph) in October to 11 km/h (7 mph) in March. Daylight lasts from about 11.3 hours in December to 12.9 hours in June.
Best time to visit Samut Prakan
Based on these averages, the most comfortable months for sightseeing and outdoor activities are November and December: average highs of 30 °C86 °F to 30 °C86 °F with 10 mm0.4 in to 49 mm1.9 in of precipitation per month.
The most challenging month is September, which is very wet (251 mm9.9 in) and humid (83% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Samut Prakan
- Wetter months (May–October) — highs 3086 to 32 °C90 °F, lows 2577 to 27 °C80 °F, about 180 mm7.1 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and an umbrella or light rain jacket.
- Drier months (November–April) — highs 3086 to 34 °C93 °F, lows 2170 to 27 °C80 °F, about 37 mm1.4 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
How Samut Prakan compares
Compared with Bangkok, about 20 km to the northwest, Samut Prakan has practically the same average temperature and receives a similar amount of precipitation. The difference is largest in December (0.8 °C1.4 °F warmer).
Of the 22 places in Thailand covered by World Climates, Samut Prakan is the 6th warmest by annual mean temperature and the 16th wettest by annual precipitation. See all of them on the Thailand climate page.
Places in other countries with the most similar temperature and rainfall pattern: Siem Reap (Cambodia, Aw), Battambang (Cambodia, Aw) and Myeik (Myanmar, Aw).
The same NASA POWER grid cell also contains Phra Pradaeng (pop. 196,129), Bang Khae (pop. 193,002), Watthana (pop. 171,150), Bang Khun Thian (pop. 165,491), Lat Krabang (pop. 163,175), Ban Khlong Prawet (pop. 160,671), Chom Thong (pop. 158,005), Nong Khaem (pop. 150,218), Ban Samae Dam (pop. 125,133), Phasi Charoen (pop. 122,070), Thon Buri (pop. 119,708) and Thung Khru (pop. 116,473) and 3 more places. Their long-term averages in this dataset are essentially the same as for Samut Prakan, so they do not have separate pages.
Nearby places
- Bangkok 20 km · 28 °C82 °F · 1,361 mm54 in
- Chon Buri 49 km · 27 °C81 °F · 1,508 mm59 in
- Khlong Luang 52 km · 28 °C82 °F · 1,361 mm54 in
- Si Racha 59 km · 28 °C83 °F · 1,347 mm53 in
- Nakhon Pathom 65 km · 28 °C82 °F · 1,195 mm47 in
- Ban I Chang 77 km · 28 °C82 °F · 1,147 mm45 in
- Pattaya 80 km · 28 °C83 °F · 1,347 mm53 in
- Si Maha Phot 107 km · 27 °C81 °F · 1,546 mm61 in
Frequently asked questions
What is the warmest month in Samut Prakan?
April is the warmest month in Samut Prakan, with an average high of 34 °C (93 °F) and an average low of 27 °C (80 °F).
What is the coldest month in Samut Prakan?
December is the coldest month, with an average high of 30 °C (86 °F) and an average low of 21 °C (70 °F).
When does it rain the most in Samut Prakan?
September is the wettest month with about 251 mm (9.9 in) of precipitation; December is the driest with about 10 mm (0.4 in).
What is the best time to visit Samut Prakan?
Judging by long-term averages, the most comfortable months are November and December.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.