May weather forecastIwaki, Japan

May

Weather in May

The last month of the spring, May, is a comfortable month in Iwaki, Japan, with an average temperature fluctuating between 19.7°C (67.5°F) and 11.7°C (53.1°F).

Temperature

In May, the average high-temperature increases from a mild 14.2°C (57.6°F) in April to a comfortable 19.7°C (67.5°F). During May, Iwaki observes a consistent average nighttime temperature of 11.7°C (53.1°F).

Humidity

In Iwaki, the average relative humidity in May is 76%.

Rainfall

In May, the rain falls for 15.5 days. Throughout May, 97mm (3.82") of precipitation is accumulated. In Iwaki, during the entire year, the rain falls for 195.5 days and collects up to 1085mm (42.72") of precipitation.

Snowfall

In Iwaki, snow does not fall in April through October.

Daylight

The average length of the day in May in Iwaki is 14h and 9min.
On the first day of May in Iwaki, Japan, sunrise is at 04:41 and sunset at 18:25. On the last day of the month, sunrise is at 04:18 and sunset at 18:49 JST.

Sunshine

The average sunshine in May is 9.3h.

UV index

In May, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In May, an average UV index of 5 transforms into the following instructions:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.

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

Frequently asked questions

The average high-temperature and low-temperature in Iwaki during May are 19.7°C (67.5°F) and 11.7°C (53.1°F) respectively.

The average relative humidity in May in Iwaki is 76%.

In Iwaki, during May, the rain falls for 15.5 days and regularly aggregates up to 97mm (3.82") of precipitation.

April through October are months without snowfall in Iwaki, Japan.

In Iwaki, the average day length in May is 14h and 9min.

In May, on the first day of the month, sunrise is at 04:41 and sunset at 18:25. On the last day of the month, in Iwaki, sunrise is at 04:18 and sunset at 18:49 JST.

In Iwaki, the average sunshine duration in May is 9.3h.

In May, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

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

Apr

May

Jun

Average high temperature

14.2°C

19.7°C

22.2°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

15.7km/h

13.2km/h

11.3km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

11.2

12.5

6.9

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Iwaki, Japan

Average high temperature in May: 19.7°C

The warmest month (with the highest average high temperature) is August (27.5°C).
The month with the lowest average high temperature is January (5.1°C).

Average low temperature in May: 11.7°C

The month with the highest average low temperature is August (20.8°C).
The coldest month (with the lowest average low temperature) is January (-1.1°C).

Average pressure in May
Iwaki, Japan

Average pressure in May: 1012.1mbar

The month with the highest atmospheric pressure is November (1018.5mbar).
The month with the lowest atmospheric pressure is June (1009.4mbar).

Average wind speed in May
Iwaki, Japan

Average wind speed in May: 12.1km/h

The windiest month (with the highest average wind speed) is January (16.5km/h).
The calmest month (with the lowest average wind speed) is July (9.4km/h).

Average humidity in May
Iwaki, Japan

Average humidity in May: 76%

The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is January (70%).

Average rainfall in May
Iwaki, Japan

Average rainfall in May: 97mm

The wettest month (with the highest rainfall) is October (152mm).
The driest months (with the least rainfall) are January and February (45mm).

Average rainfall days in May
Iwaki, Japan

Average rainfall days in May: 15.5 days

The month with the highest number of rainy days is July (23.9 days).
The month with the least rainy days is February (10.8 days).

Average snowfall in May
Iwaki, Japan

Average snowfall in May: 0mm

The month with the highest snowfall is February (67mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in May
Iwaki, Japan

Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (6.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in May: 14h and 12min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

Average sunshine in May: 9h and 18min

The month with the most sunshine is August (Average sunshine: 9h and 24min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).

Average sunshine days in May
Iwaki, Japan

Average sunshine days in May: 12.5 days

The month with the most sunshine days is November (15.4 days).
The month with the least sunshine days is July (3.8 days).

Average UV index in May
Iwaki, Japan

Average UV index in May: 5

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).