September weather forecast
Yamagata, Japan

Transitioning from summer to autumn, September’s weather in Yamagata is noticeable for its average temperature drop to 25°C (77°F). Days in September start to gradually become shorter, signaling the approaching autumn. Though the rainfall of 134mm (5.28") remains high, it is significantly less than that in August. The changing foliage colours from bright greens to warm browns and oranges hint at the arrival of October and quintessential autumn.

Temperature

Start of September in Yamagata brings a shift in the average high-temperature, falling from August's tropical 30°C (86°F) to a warm 25°C (77°F). The low-temperature averages to an enjoyable 16°C (60.8°F) during the nights of September.

Rainfall

In Yamagata, Japan, in September, during 20 rainfall days, 134mm (5.28") of precipitation is typically accumulated. In Yamagata, during the entire year, the rain falls for 260 days and collects up to 1125mm (44.29") of precipitation.

Snowfall

May through October are months without snowfall in Yamagata.

Daylight

In September, the average length of the day is 12h and 27min.
On the first day of the month, sunrise is at 05:08 and sunset at 18:08. On the last day of September, sunrise is at 05:33 and sunset at 17:23 JST.

Sunshine

The average sunshine in September is 4h.

UV index

In September, the average daily maximum UV index in Yamagata is 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The daily high UV index of 7 during September translates into the following recommendations:
Shield from overexposure. Defense against sun-related harm is required. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.