May weather forecast
Iwai, Japan

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Weather in May

The last month of the spring, May, is a warm month in Iwai, Japan, with temperature in the range of an average high of 23.9°C (75°F) and an average low of 15.4°C (59.7°F).

Temperature

In Iwai, the average high-temperature in May rises, from a refreshing 18.2°C (64.8°F) in April, to a moderately hot 23.9°C (75°F). May's average low-temperature reading in Iwai settles at a mild 15.4°C (59.7°F).

Humidity

In May, the average relative humidity is 68%.

Rainfall

In Iwai, during May, the rain falls for 13.5 days and regularly aggregates up to 75mm (2.95") of precipitation. In Iwai, during the entire year, the rain falls for 161.3 days and collects up to 876mm (34.49") of precipitation.

Snowfall

In Iwai, snow does not fall in April through December.

Daylight

In Iwai, the average length of the day in May is 14h and 5min.
On the first day of the month, sunrise is at 04:47 and sunset at 18:27. On the last day of May, in Iwai, sunrise is at 04:25 and sunset at 18:51 JST.

Sunshine

In May, the average sunshine in Iwai is 9h.

UV index

The average daily maximum UV index in May in Iwai is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: In May, the maximum UV index of 5 suggests this advice:
Adopt protective measures - It is advised to guard against sun damage. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Updated: Jan 31, 2024 | Published by: Weather Atlas | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What is the usual temperature for Iwai in May?

May temperatures in Iwai vary between a high-temperature of 23.9°C (75°F) and a low-temperature of 15.4°C (59.7°F).

What is the average humidity in May in Iwai?

The average relative humidity in May is 68%.

How much does it rain in Iwai in May?

In Iwai, Japan, in May, during 13.5 rainfall days, 75mm (2.95") of precipitation is typically accumulated.

When it does not snow in Iwai?

April through December are months without snowfall in Iwai, Japan.

How many hours of daylight does Iwai have in May?

In Iwai, Japan, the average day length in May is 14h and 5min.

When are sunrise and sunset in May in Iwai?

On the first day of May, sunrise is at 04:47 and sunset at 18:27. On the last day of the month, sunrise is at 04:25 and sunset at 18:51 JST.

How many hours of sunshine does Iwai have in May?

In May, the average sunshine duration in Iwai, Japan, is 9h.

What is the UV index intensity in May in Iwai?

In May, the average daily maximum UV index in Iwai is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Iwai, Japan

Average temperature in May - Iwai, Japan
  • Average high temperature in May: 23.9°C

The warmest month (with the highest average high temperature) is August (31.9°C).
The month with the lowest average high temperature is January (8.3°C).

  • Average low temperature in May: 15.4°C

The month with the highest average low temperature is August (24.4°C).
The coldest month (with the lowest average low temperature) is January (1.7°C).

Average pressure in May
Iwai, Japan

Average pressure in May - Iwai, Japan
  • Average pressure in May: 1012mbar

The month with the highest atmospheric pressure is November (1018.2mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).

Average wind speed in May
Iwai, Japan

Average wind speed in May - Iwai, Japan
  • Average wind speed in May: 11.1km/h

The windiest month (with the highest average wind speed) is April (12.3km/h).
The calmest month (with the lowest average wind speed) is November (9.1km/h).

Average humidity in May
Iwai, Japan

Average humidity in May - Iwai, Japan
  • Average humidity in May: 68%

The months with the highest relative humidity are June and July (76%).
The month with the lowest relative humidity is January (60%).

Average rainfall in May
Iwai, Japan

Average rainfall in May - Iwai, Japan
  • Average rainfall in May: 75mm

The wettest month (with the highest rainfall) is October (122mm).
The driest month (with the least rainfall) is December (31mm).

Average rainfall days in May
Iwai, Japan

Average rainfall days in May - Iwai, Japan
  • Average rainfall days in May: 13.5 days

The month with the highest number of rainy days is July (18.7 days).
The month with the least rainy days is January (6.3 days).

Average snowfall in May
Iwai, Japan

Average snowfall in May - Iwai, Japan
  • Average snowfall in May: 0mm

The month with the highest snowfall is February (36mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).

Average snowfall days in May
Iwai, Japan

Average snowfall days in May - Iwai, Japan
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (2 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in May / Average sunshine in May - Iwai, Japan
  • Average daylight in May: 14h and 1min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in May: 9h and 0min

The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).

Average sunshine days in May
Iwai, Japan

Average sunshine days in May - Iwai, Japan
  • Average sunshine days in May: 15.8 days

The month with the most sunshine days is January (23.3 days).
The month with the least sunshine days is June (9.7 days).

Average UV index in May
Iwai, Japan

Average UV index in May - Iwai, Japan
  • Average UV index in May: 5

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).

Average cloud cover in May
Iwai, Japan

Average cloud cover in May - Iwai, Japan
  • Average cloud cover in May: 39

The month with the most cloud cover is June (Cloud cover 49).
The month with the least cloud cover is January (Cloud cover 29).

Average visibility in May
Iwai, Japan

Average visibility in May - Iwai, Japan
  • Average visibility in May: 9km

The months with the highest visibility are January, February, March, November and December (10km).
The months with the lowest visibility are April, May, June, July, August, September and October (9km).

Iwai, Japan

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