Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
May
Weather in May
Temperature
Iwanai in May experiences an increase in the average high-temperature, moving from April's chilly 7.3°C (45.1°F) to a refreshing 14.4°C (57.9°F). The average low-temperature, in May, is a chilly 6.2°C (43.2°F).Humidity
In May, the average relative humidity is 80%.Rainfall
In May, in Iwanai, the rain falls for 15.6 days. Throughout May, 58mm (2.28") of precipitation is accumulated. Throughout the year, there are 157.1 rainfall days, and 887mm (34.92") of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.4 snowfall days, in May, Iwanai aggregates 5mm (0.2") of snow. In Iwanai, during the entire year, snow falls for 120.8 days and aggregates up to 2288mm (90.08") of snow.Daylight
In Iwanai, the average length of the day in May is 14h and 39min.On the first day of the month, sunrise is at 04:31 and sunset at 18:38. On the last day of May, sunrise is at 04:01 and sunset at 19:09 JST.
Sunshine
May and August, with an average of 8.4h of sunshine, are months with the most sunshine.UV index
In Iwanai, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index, 4 during May, leads to the following recommendations:
Guard yourself - Avoiding sunburn is suggested. It's recommended to limit sun exposure when its radiation is at its peak during midday. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
How many days does it rain in May in Iwanai?
What is the last month it snows?
What is the average length of the day in May?
What time are sunrise and sunset in May?
What are the months with the most sunshine?
How long on average sun shines in May?
What is the UV index reading in May in Iwanai?
Average temperature in May
Iwanai, Japan
- Average high temperature in May: 14.4°C
The warmest month (with the highest average high temperature) is August (23.3°C).
The month with the lowest average high temperature is January (-3.8°C).
- Average low temperature in May: 6.2°C
The month with the highest average low temperature is August (16.1°C).
The coldest month (with the lowest average low temperature) is February (-8.9°C).
Average pressure in May
Iwanai, Japan
- Average pressure in May: 1010.3mbar
The month with the highest atmospheric pressure is November (1016.4mbar).
The month with the lowest atmospheric pressure is July (1008.4mbar).
Average wind speed in May
Iwanai, Japan
- Average wind speed in May: 11.1km/h
The windiest month (with the highest average wind speed) is December (14.5km/h).
The calmest month (with the lowest average wind speed) is August (8km/h).
Average humidity in May
Iwanai, Japan
- Average humidity in May: 80%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is April (79%).
Average rainfall in May
Iwanai, Japan
- Average rainfall in May: 58mm
The wettest month (with the highest rainfall) is August (105mm).
The driest month (with the least rainfall) is April (52mm).
Average rainfall days in May
Iwanai, Japan
- Average rainfall days in May: 15.6 days
The month with the highest number of rainy days is August (19.1 days).
The month with the least rainy days is January (3.4 days).
Average snowfall in May
Iwanai, Japan
- Average snowfall in May: 5mm
The month with the highest snowfall is December (598mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in May
Iwanai, Japan
- Average snowfall days in May: 0.4 days
The month with the highest number of snowfall days is January (28.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Iwanai, Japan
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in May: 8h and 2min
The months with the most sunshine are May and August (Average sunshine: 8h and 24min).
The month with the least sunshine is January (Average sunshine: 1h and 24min).
Average sunshine days in May
Iwanai, Japan
- Average sunshine days in May: 13.3 days
The month with the most sunshine days is May (13.3 days).
The month with the least sunshine days is January (2.7 days).
Average UV index in May
Iwanai, Japan
- Average UV index in May: 4
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in May
Iwanai, Japan
- Average cloud cover in May: 47
The month with the most cloud cover is January (Cloud cover 86).
The month with the least cloud cover is September (Cloud cover 43).
Average visibility in May
Iwanai, Japan
- Average visibility in May: 9km
The months with the highest visibility are April, May and October (9km).
The months with the lowest visibility are January, February, July, August and December (7km).
