With a population of around 12,200, Seclin sits in Hauts-de-France, France. The city operates in the Central European time zone.
In 2025, Seclin recorded an average annual temperature of 53°F. The hottest temperatures reached 98°F in July; the coolest were 22°F in January. Total precipitation for the year was 24 inches, with the wettest month being January. Snowfall for the year totaled approximately 3 inches.
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