August weather forecast
Yamagata, Japan

Literally following the heat, August proudly holds the title for the warmest month in Yamagata, with temperatures soaring to an average of 30°C (86°F). Along with this comes a stimulating increase in rainfall at 149mm (5.87"), the highest in the year. August continues to highlight Yamagata's very distinct and lush summer character. Moreover, with a UV Index of 9, sun protection becomes a necessity. By August end, locals eagerly look forward to a shift in weather as September approaches with its relatively cooler temperatures and less rainfall.

Temperature

Yamagata's August weather reaches an average high of 30°C (86°F) and an average low of 20°C (68°F), making it the warmest month.

Rainfall

The month with the most rainfall in Yamagata is August, when the rain falls for 19 days and typically aggregates up to 149mm (5.87") of precipitation.

Snowfall

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

Daylight

In August, the average length of the day is 13h and 38min.
On the first day of the month, sunrise is at 04:41 and sunset at 18:48. On the last day of August, in Yamagata, sunrise is at 05:07 and sunset at 18:10 JST.

Sunshine

The average sunshine in August in Yamagata, Japan, is 6h.

UV index

The average daily maximum UV index in August is 9. A UV Index estimate of 8 to 10 represents a very high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high daily UV index of 9 during August translates into the following directions:
Without proper safety measures, skin and eyes can be quickly harmed. Be sure to protect yourself. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Even on overcast days, apply and frequently reapply a sunscreen with SPF 30 or more, specifically after a swim or outdoor workout.