Seno (Lao: ເຊໂນ) or Xeno is a town located in the Savannakhet Province of Laos.

Up until that point, Seno held the highest temperature recorded in Laos when 42.3 °C (108.1 °F) was observed on 12 April 2016.

[2] That ended when Luang Prabang reached 42.7 °C (108.9 °F) on 19 April 2023[3] and later 43.5 °C (110.3 °F) on 6 May.

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