May weather forecast
Yamagata, Japan

May presents itself as a truly spring month in Yamagata. The thawed land flourishes under moderate rainfall, greenery is vibrant, and temperatures are comfortably temperate. Additionally, days stretch even longer, lasting for 14.2 daylight hours. A unique feature of May’s weather conditions is the highest UV index of the year at 8. These sunny, warm, and extended days distinguish it markedly from the approaching hot and rainy season in June.

Temperature

The shift into May brings an increase in the average high-temperature, moving from a comfortable 16°C (60.8°F) in April to a pleasant 22°C (71.6°F). Yamagata experiences a drastic reduction from day temperatures to an average low of 10°C (50°F) in May.

Rainfall

In Yamagata, in May, it is raining for 17 days, with typically 81mm (3.19") of accumulated precipitation. Throughout the year, there are 260 rainfall days, and 1125mm (44.29") of precipitation is accumulated.

Snowfall

In Yamagata, Japan, snow does not fall in May through October.

Daylight

In Yamagata, the average length of the day in May is 14h and 15min.
On the first day of the month, sunrise is at 04:41 and sunset at 18:29. On the last day of May, sunrise is at 04:17 and sunset at 18:55 JST.

Sunshine

May has the most sunshine of the year in Yamagata, with an average of 7h of sunshine.

UV index

In Yamagata, Japan, the average daily maximum UV index in May is 8. A UV Index estimate of 8 to 10 represents a very high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: A daily high UV index of 8 in May leads to these guidelines:
Remember to safeguard yourself. Rapid damage can occur to skin and eyes without protection. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.