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Monthly climate in Sainyabuli, Laos

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Sainyabuli features a tropical savanna climate (Aw). Temperatures typically range between 20 °C (68 °F) and 27 °C (80 °F) through the year, but rarely can drop to 4 °C (40 °F) or can rise to as high as 38 °C (102 °F). The average annual precipitation amounts to about 1725 mm (67.9 inches) and receives 173 rainy days on the 1 mm (0.04 inches) threshold annually. Sainyabuli enjoys an average of 3417 hours of sunshine throughout the year, and daylight varies from 10 hours 58 minutes to 13 hours 15 minutes per day.

Monthly average temperatures in Sainyabuli, Laos

The warmest months in Sainyabuli are May, June and July, with daily mean temperatures ranging from 26 to 27 °C (80 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 20 to 22 °C (68 - 71 °F) throughout the day. On average each year, Sainyabuli experiences 313 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Sainyabuli. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum33°C
(92°F)		35°C
(94°F)		38°C
(100°F)		38°C
(102°F)		38°C
(100°F)		36°C
(98°F)		35°C
(95°F)		35°C
(95°F)		34°C
(94°F)		33°C
(92°F)		34°C
(93°F)		31°C
(88°F)
Mean maximum31°C
(88°F)		34°C
(93°F)		36°C
(96°F)		36°C
(98°F)		35°C
(96°F)		34°C
(93°F)		34°C
(94°F)		34°C
(93°F)		34°C
(93°F)		33°C
(91°F)		32°C
(90°F)		30°C
(87°F)
Average high27°C
(81°F)		29°C
(85°F)		32°C
(90°F)		32°C
(90°F)		32°C
(90°F)		31°C
(88°F)		30°C
(87°F)		30°C
(86°F)		31°C
(87°F)		30°C
(86°F)		29°C
(85°F)		27°C
(81°F)
Daily mean20°C
(69°F)		22°C
(71°F)		25°C
(76°F)		26°C
(79°F)		27°C
(80°F)		27°C
(80°F)		26°C
(80°F)		26°C
(79°F)		26°C
(79°F)		25°C
(77°F)		23°C
(74°F)		20°C
(68°F)
Average low15°C
(59°F)		15°C
(60°F)		19°C
(66°F)		21°C
(70°F)		23°C
(73°F)		24°C
(75°F)		24°C
(75°F)		23°C
(74°F)		23°C
(73°F)		21°C
(71°F)		19°C
(66°F)		14°C
(58°F)
Mean minimum11°C
(53°F)		11°C
(53°F)		15°C
(59°F)		18°C
(64°F)		21°C
(69°F)		22°C
(73°F)		22°C
(72°F)		22°C
(72°F)		21°C
(70°F)		18°C
(65°F)		15°C
(59°F)		8°C
(47°F)
Minimum9°C
(48°F)		10°C
(51°F)		14°C
(57°F)		15°C
(59°F)		20°C
(68°F)		22°C
(72°F)		21°C
(71°F)		21°C
(71°F)		19°C
(67°F)		16°C
(60°F)		13°C
(57°F)		4°C
(40°F)

Compare climate in Sainyabuli with other places

Compare temperature, precipitation, sunshine, UV index in Sainyabuli, Laos with other places around the world.

Monthly average precipitation in Sainyabuli, Laos

Sainyabuli usually has the most precipitation in July, August and September, with an average of 26 rainy days and 341 mm (13.4 inches) of precipitation per month. The driest months in Sainyabuli are February, March and December. On average, 16 mm (0.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sainyabuli. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)24 (1.0)16 (0.6)16 (0.6)90 (3.6)118 (4.7)232 (9.1)337 (13.3)423 (16.7)262 (10.3)164 (6.5)24 (0.9)17 (0.7)
Average precipitation days (≥ 1 mm)3151320242728251962

Monthly sunshine hours in Sainyabuli, Laos

The sunniest months in Sainyabuli are March, May and December, when the sun shines an average of 10 hours 11 minutes a day. Least sunny months in Sainyabuli: January, July and August receive an average of 7 hours 57 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sainyabuli. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours244291323309313267266229268291301310
Mean daily daylight hours11h 5m11h 30m12h 1m12h 34m13h 2m13h 15m13h 8m12h 44m12h 13m11h 41m11h 12m10h 58m

Solar UV radiation in Sainyabuli, Laos

Sainyabuli experiences the highest level of ultraviolet (UV) radiation in July, August and September, when the maximum UV index can reach values of 14 - 15, which corresponds to the Extreme category of sun exposure. January, November and December are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 10. For more detailed information, check out our hourly Sainyabuli UV Index data.

Average daily maximum UV levels by month for Sainyabuli. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)9111313141415151412108