Yilan City Weather & Climate: Best Time to Visit

The climate in Yilan City is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a very warm 31°C (88°F) in July, the warmest time of the year, to a moderate 18°C (64°F) during cooler months like January.

At night, you can expect temperatures ranging from 25°C (77°F) in July to around 13°C (55°F) during January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Yilan City has a notably wet climate with abundant precipitation, recording 3349 mm (132 in) of rainfall per year. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, October it receives heavy rainfall, averaging 408 mm (16 in) of precipitation, recorded across 16 rainy days. In contrast, the driest month March brings less rainfall, with 162 mm (6.4 in) over 21 rainy days. For more details, please visit our Yilan City Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Seasonal changes in sunshine hours are quite dramatic in Yilan City. While July receives considerable daily sunshine with up to 7.5 hours, February marks the darkest time of the year, where sunshine is scarce with only 2.1 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The city experiences its highest humidity in May, reaching 84%. In July, the humidity drops to its lowest level at 79%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year