May weather forecastKoshihara, Japan

May

Weather in May

The last month of the spring, May, is a moderately hot month in Koshihara, Japan, with an average temperature ranging between min 23.2°C (73.8°F) and max 24.7°C (76.5°F).

Temperature

The onset of May manifests an average high-temperature of a moderately hot 24.7°C (76.5°F), demonstrating a minor variation from the preceding month. Koshihara registers a gentle descent to an average nighttime low of 23.2°C (73.8°F) in May from its daytime highs.

Humidity

The average relative humidity in May is 82%.

Rainfall

In May, the rain falls for 18.1 days. Throughout May, 174mm (6.85") of precipitation is accumulated. In Koshihara, Japan, during the entire year, the rain falls for 227.4 days and collects up to 1405mm (55.31") of precipitation.

Daylight

In May, the average length of the day is 13h and 25min.
On the first day of May, sunrise is at 05:51 and sunset at 19:00. On the last day of the month, sunrise is at 05:36 and sunset at 19:16 JST.

Sunshine

In Koshihara, the average sunshine in May is 8.3h.

UV index

In May, the average daily maximum UV index in Koshihara is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 6 during May leads to these instructions:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. 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. A hat with a broad brim is indispensable, filtering out up to half of UV rays.

Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

During May, Koshihara experiences an average high-temperature of 24.7°C (76.5°F) and a low-temperature of 23.2°C (73.8°F).

In Koshihara, Japan, the average relative humidity in May is 82%.

In Koshihara, during May, the rain falls for 18.1 days and regularly aggregates up to 174mm (6.85") of precipitation.

In May, the average day length is 13h and 25min.

On the first day of May in Koshihara, Japan, sunrise is at 05:51 and sunset at 19:00. On the last day of the month, sunrise is at 05:36 and sunset at 19:16 JST.

In May, the average sunshine duration is 8.3h.

The average daily maximum UV index in May in Koshihara, Japan, is 6. A UV Index reading of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

22.2°C

24.7°C

27.2°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

24.2km/h

21.1km/h

22.6km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

11.5

10.7

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Koshihara, Japan

Average high temperature in May: 24.7°C

The warmest month (with the highest average high temperature) is August (29.4°C).
The month with the lowest average high temperature is January (18.9°C).

Average low temperature in May: 23.2°C

The month with the highest average low temperature is August (28.3°C).
The coldest month (with the lowest average low temperature) is January (17°C).

Average pressure in May
Koshihara, Japan

Average pressure in May: 1011.1mbar

The month with the highest atmospheric pressure is January (1020.8mbar).
The month with the lowest atmospheric pressure is August (1006.6mbar).

Average wind speed in May
Koshihara, Japan

Average wind speed in May: 20.1km/h

The windiest month (with the highest average wind speed) is December (28.4km/h).
The calmest month (with the lowest average wind speed) is May (20.1km/h).

Average humidity in May
Koshihara, Japan

Average humidity in May: 82%

The month with the highest relative humidity is June (86%).
The month with the lowest relative humidity is January (72%).

Average rainfall in May
Koshihara, Japan

Average rainfall in May: 174mm

The wettest month (with the highest rainfall) is June (201mm).
The driest month (with the least rainfall) is February (59mm).

Average rainfall days in May
Koshihara, Japan

Average rainfall days in May: 18.1 days

The month with the highest number of rainy days is June (21.5 days).
The month with the least rainy days is July (16.4 days).

Average daylight in May /
Average sunshine in May
Koshihara, Japan

Average daylight in May: 13h and 24min

The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 30min).

Average sunshine in May: 8h and 18min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

Average sunshine days in May
Koshihara, Japan

Average sunshine days in May: 10.7 days

The month with the most sunshine days is July (11.9 days).
The month with the least sunshine days is December (5.7 days).

Average UV index in May
Koshihara, Japan

Average UV index in May: 6

The months with the highest UV index are June, July, August and September (UV index 7).
The month with the lowest UV index is December (UV index 4).

Average cloud cover in May
Koshihara, Japan

Average cloud cover in May: 49

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 34).

Average visibility in May
Koshihara, Japan

Average visibility in May: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).