# Sum Sao Subdistrict, Phen, Udon Thani Province – Villages > Source: https://wherepedia.org/thailand/udon-thani/phen/sum-sao/ Subdistrict · Phen # Sum Sao Sum Sao is a subdistrict (tambon) of Thailand in Phen, Udon Thani Province. It covers **122.1 km²**. 18 named villages and localities are recorded here, and 28 mapped services such as hospitals, banks and schools. - 122km² - 28mapped services - 179 mtypical elevation ## Where is Sum Sao? Sum Sao lies in [Phen](https://wherepedia.org/thailand/udon-thani/phen/), [Udon Thani Province](https://wherepedia.org/thailand/udon-thani/), [Thailand](https://wherepedia.org/thailand/). It borders 9 other subdistricts: [Ban Daeng](https://wherepedia.org/thailand/udon-thani/phibun-rak/ban-daeng/), [Ban Lao](https://wherepedia.org/thailand/udon-thani/phen/ban-lao/), [Chiang Wang](https://wherepedia.org/thailand/udon-thani/phen/chiang-wang/), [Na Bua](https://wherepedia.org/thailand/udon-thani/phen/na-bua/), [Na Kha](https://wherepedia.org/thailand/udon-thani/mueang-udon-thani/na-kha/), [Na Sai](https://wherepedia.org/thailand/udon-thani/phibun-rak/na-sai/), [Phen](https://wherepedia.org/thailand/udon-thani/phen/phen/), [Sang Paen](https://wherepedia.org/thailand/udon-thani/phen/sang-paen/) and [Tao Hai](https://wherepedia.org/thailand/udon-thani/phen/tao-hai/). By area it is the 928th largest of 7,425 subdistricts in Thailand. It covers 13.4% of [Phen](https://wherepedia.org/thailand/udon-thani/phen/). The centre of Sum Sao is about 504 km in a straight line from Bangkok, the capital. It is about 11 km from Phen, the main town of Phen. The centre point is at 17.6151° N, 102.9627° E. Local names: สุมเส้า . Source: [Royal Thai Survey Department via OCHA HDX, administrative boundaries (COD-AB, CC BY-IGO)](https://data.humdata.org/dataset/cod-ab-tha). ## Villages and localities in Sum Sao Open gazetteers list **18 villages, towns and localities** in Sum Sao. Settlements here lie between about 172 m and 204 m above sea level (median 179 m). - Ban Bun Than Phatthana - Ban Charoen Si - Ban Chum Si - Ban Dong Po - Ban Dong Yang - Ban Huai Wang Ton - Ban Non Nam Thaeng - Ban Non Sa-at - Ban Non Sang Kham - Ban Non Thap Chang - Ban Nong Bua Ban - Ban Nong Na Hai - Ban Nong Phue Noi - Ban Nong Saen To - Ban Phaeng Si - Ban Song Pueai - Ban Sum Sao - Ban Wang Hin Source: [GeoNames (CC BY 4.0) — settlements, natural and historic features](https://www.geonames.org/); [© OpenStreetMap contributors (ODbL), Geofabrik extract — named settlements](https://www.openstreetmap.org/copyright). ## Landscape and landmarks of Sum Sao Named natural and historic features inside Sum Sao, from the GeoNames gazetteer. ### Water 5 reservoirs and tanks. - Ang Kep Nam Huai Ban - Ang Kep Nam Huai Na Khae - Ang Kep Nam Huai Nam Phu - Ang Kep Nam Huai Wang Bak - Ang Kep Nam Huai Wang Ton Source: [GeoNames (CC BY 4.0) — settlements, natural and historic features](https://www.geonames.org/). Places of worship are not listed. Elevations are from the GeoNames terrain model and are approximate. ## Weather in Sum Sao and the best time to visit Using the climate of Phen, the warmest month is Apr (average 31 °C) and the coolest is Dec (20 °C). About 1,478 mm of rain falls in a year; the wettest month is Aug (306 mm) and the driest Dec (5 mm). The most comfortable months for a visit are **October to February**. - Jan - Feb - Mar - Apr - May - Jun - Jul - Aug - Sep - Oct - Nov - Dec Month Average °C Rain mm Jan 22 7 Feb 25 18 Mar 28 44 Apr 31 74 May 29 199 Jun 28 211 Jul 27 264 Aug 26 306 Sep 26 238 Oct 25 96 Nov 23 16 Dec 20 5 Source: [NASA POWER climatology, retrieved 2026-10-29](https://power.larc.nasa.gov/). ## Nearest hospital, bank and fuel from Sum Sao Need Nearest mapped Distance Hospital โรงพยาบาลเพ็ญ · Sum Sao 3.8 km [Map](https://www.openstreetmap.org/?mlat=17.58959&mlon=102.98679#map=17/17.58959/102.98679) Bank ธกส สาขาย่อยสุมเส้า · Sum Sao 4.6 km [Map](https://www.openstreetmap.org/?mlat=17.58128&mlon=102.98747#map=17/17.58128/102.98747) ATM Kasikorn Bank · Sam Phrao 21 km [Map](https://www.openstreetmap.org/?mlat=17.44734&mlon=102.87508#map=17/17.44734/102.87508) Petrol pump ปั๊มน้ำมันบางจาก · Sum Sao 3.9 km [Map](https://www.openstreetmap.org/?mlat=17.58467&mlon=102.98170#map=17/17.58467/102.98170) Hotel วัง-สักทอง รีสอร์ท · Sum Sao 3.5 km [Map](https://www.openstreetmap.org/?mlat=17.58342&mlon=102.96679#map=17/17.58342/102.96679) Mall Tesco Lotus Express เพ็ญ · Phen 11 km [Map](https://www.openstreetmap.org/?mlat=17.69495&mlon=102.90461#map=17/17.69495/102.90461) School โรงเรียนดงยางวังโตนวิทยา · Sum Sao 3.2 km [Map](https://www.openstreetmap.org/?mlat=17.60714&mlon=102.99126#map=17/17.60714/102.99126) College มหาวิทยาลัยเทคโนโลยีบริหารธุรกิจอุดรธานี · Phen 11 km [Map](https://www.openstreetmap.org/?mlat=17.69830&mlon=102.90900#map=17/17.69830/102.90900) Police station สถานีตำรวจภูธรเพ็ญ · Phen 11 km [Map](https://www.openstreetmap.org/?mlat=17.69618&mlon=102.90797#map=17/17.69618/102.90797) Source: [Overture Maps places (CDLA-Permissive-2.0) and © OpenStreetMap contributors (ODbL)](https://overturemaps.org/). Straight-line distance from the centre of the division, within 40 km. ## Hospitals, banks and other services in Sum Sao Places mapped inside Sum Sao in open map data, by type. - Hospitals4 - Banks1 - Petrol pumps3 - Hotels3 - Schools6 - Pharmacies1 - Restaurants10 Source: [Overture Maps places (CDLA-Permissive-2.0) and © OpenStreetMap contributors (ODbL)](https://overturemaps.org/). Coverage depends on what has been mapped; contact details are not shown. ## Other subdistricts in Phen - Ban Lao - Ban That - Chiang Wang - Chom Si - Khok Klang - Na Bua - Na Phu - Phen - Sang Paen - Tao Hai ## Quick answers - Where is Sum Sao?In Phen, Udon Thani Province, Thailand - What borders Sum Sao?Ban Daeng, Ban Lao, Chiang Wang, Na Bua, Na Kha, Na Sai, Phen, Sang Paen and Tao Hai - How many villages are in Sum Sao?18 named settlements (GeoNames, OpenStreetMap) - What is the elevation of Sum Sao?Settlements lie between 172 m and 204 m - How many reservoirs and tanks are in Sum Sao?5 named in GeoNames - What is the best time to visit Sum Sao?October to February - Where is the nearest hospital to Sum Sao?โรงพยาบาลเพ็ญ, about 3.8 km from the centre - Where is the nearest bank to Sum Sao?ธกส สาขาย่อยสุมเส้า, about 4.6 km from the centre - Where is the nearest ATM to Sum Sao?Kasikorn Bank, about 21 km from the centre - Where is the nearest petrol pump to Sum Sao?ปั๊มน้ำมันบางจาก, about 3.9 km from the centre - How many hospitals are in Sum Sao?4 mapped - How many banks are in Sum Sao?1 mapped - How many petrol pumps are in Sum Sao?3 mapped - What is the P-code of Sum Sao?TH411905 (OCHA common operational dataset)