Ubon Ratchathani climate
Ubon Ratchathani (Thailand) has a tropical savanna (dry winter) climate (Köppen Aw). The average temperature over the year is 27 °C81 °F, and about 1,523 mm60 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Ubon Ratchathani climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 3391 | 1865 | 2678 | 50.2 |
| Feb | 3595 | 2170 | 2883 | 60.2 |
| Mar | 3798 | 2476 | 3087 | 321.3 |
| Apr | 3698 | 2679 | 3188 | 732.9 |
| May | 3392 | 2577 | 2984 | 1736.8 |
| Jun | 3187 | 2476 | 2781 | 2027.9 |
| Jul | 2985 | 2475 | 2780 | 29712 |
| Aug | 2984 | 2475 | 2679 | 29912 |
| Sep | 2985 | 2374 | 2679 | 30112 |
| Oct | 3085 | 2272 | 2679 | 1084.2 |
| Nov | 3086 | 2068 | 2577 | 210.8 |
| Dec | 3187 | 1865 | 2576 | 70.3 |
| Year | 3798 | 1865 | 2781 | 1,52360 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 57% | 34% | 5.1 | 11:19 |
| Feb | 49% | 38% | 5.5 | 11:38 |
| Mar | 50% | 55% | 5.4 | 12:01 |
| Apr | 56% | 66% | 5.8 | 12:28 |
| May | 73% | 81% | 5.7 | 12:50 |
| Jun | 84% | 87% | 5.5 | 13:01 |
| Jul | 88% | 88% | 5.1 | 12:57 |
| Aug | 89% | 90% | 4.9 | 12:38 |
| Sep | 89% | 87% | 4.8 | 12:12 |
| Oct | 86% | 62% | 5.1 | 11:46 |
| Nov | 80% | 46% | 5.0 | 11:24 |
| Dec | 67% | 37% | 4.9 | 11:14 |
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 Ubon Ratchathani is like
The warmest month is April, with an average high of 36 °C98 °F and a low of 26 °C79 °F. The coldest is December, when highs average 31 °C87 °F and lows 18 °C65 °F. Seasonal differences are small — just 6.6 °C11.8 °F between the warmest and the coolest month.
It is wet, with about 1,523 mm60 in of precipitation per year. The wettest three-month stretch is July–September, which brings 59% of the annual total. Months with less than 20 mm0.8 in on average: December–February. The wettest month is September (301 mm12 in), the driest is January (5 mm0.2 in).
Relative humidity ranges from 49% in February to 89% in August. The clearest skies (lowest average cloud amount, 34%) are typical of January. Average wind speed near the ground ranges from 6 km/h (4 mph) in September to 10 km/h (6 mph) in December. Daylight lasts from about 11.2 hours in December to 13.0 hours in June.
Best time to visit Ubon Ratchathani
Based on these averages, the most comfortable months for sightseeing and outdoor activities are November and December: average highs of 30 °C86 °F to 31 °C87 °F with 7 mm0.3 in to 21 mm0.8 in of precipitation per month.
The most challenging month is September, which is very wet (301 mm12 in) and humid (89% 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 Ubon Ratchathani
- Wetter months (May–September) — highs 2984 to 33 °C92 °F, lows 2374 to 25 °C77 °F, about 254 mm10 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and a good rain jacket or umbrella and quick-drying shoes.
- Drier months (October–April) — highs 3085 to 37 °C98 °F, lows 1865 to 26 °C79 °F, about 36 mm1.4 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
How Ubon Ratchathani compares
Compared with Savannakhet, about 148 km to the north, Ubon Ratchathani is on average 1 °C1.7 °F warmer and receives 24% more precipitation (1,523 mm60 in vs 1,227 mm48 in). The difference is largest in January (3.2 °C5.8 °F warmer).
Of the 22 places in Thailand covered by World Climates, Ubon Ratchathani is the 14th warmest by annual mean temperature and the 7th 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 (seasons shifted for the other hemisphere where needed): Cuiabá (Brazil, Aw), Mawlamyine (Myanmar, Aw) and Rondonópolis (Brazil, Aw).
Nearby places
- Savannakhet 148 km · 26 °C79 °F · 1,227 mm48 in
- Siem Reap 234 km · 28 °C82 °F · 1,261 mm50 in
- Khon Kaen 254 km · 27 °C80 °F · 1,364 mm54 in
- Nakhon Ratchasima 296 km · 27 °C80 °F · 1,220 mm48 in
- Battambang 297 km · 27 °C81 °F · 1,821 mm72 in
- Ðông Hà 298 km · 26 °C78 °F · 2,132 mm84 in
- Đồng Hới 312 km · 26 °C79 °F · 1,928 mm76 in
- Huế 324 km · 26 °C79 °F · 2,160 mm85 in
Frequently asked questions
What is the warmest month in Ubon Ratchathani?
April is the warmest month in Ubon Ratchathani, with an average high of 36 °C (98 °F) and an average low of 26 °C (79 °F).
What is the coldest month in Ubon Ratchathani?
December is the coldest month, with an average high of 31 °C (87 °F) and an average low of 18 °C (65 °F).
When does it rain the most in Ubon Ratchathani?
September is the wettest month with about 301 mm (11.9 in) of precipitation; January is the driest with about 5 mm (0.2 in).
What is the best time to visit Ubon Ratchathani?
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.