With a population of around 1,300, Jirnsum sits in Friesland, Netherlands. The city operates in the Central European time zone.
In 2025, Jirnsum recorded an average annual temperature of 51°F. The hottest temperatures reached 89°F in July; the coolest were 22°F in February. Total precipitation for the year was 33 inches, with the wettest month being October. Snowfall for the year totaled approximately 5 inches.
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