Lytton experiences either a dry-summer warm-summer humid continental climate (Köppen climate classification: "Dsb" bordering "Dsa"), or a warm-summer mediterranean climate (Köppen climate classification: "Csb" bordering "Csa"). During summer heat waves, Lytton is often the hottest spot in Canada, despite being north of 50° in latitude. Due to the dry summer air and a relatively low elevation of , summer afternoon shade temperatures sometimes reach and up and occasionally top . Lytton, along with the nearby community of Lillooet, share the second-highest temperature ever recorded in Canada. On July 16 and 17, 1941, the temperature reached a record on both days in both communities. Lytton also holds the record for the hottest temperature ever recorded in the province during August after the temperature reached on August 14, 2004. The coldest temperature ever recorded in Lytton was -31.7 °C (-25 °F) on 18 January 1950.