May
Weather in May
Temperature
May introduces a minor temperature shift, with average high-temperatures adjusting from April's enjoyable 19.6°C (67.3°F) to a moderately hot 24.4°C (75.9°F). In May, Okayama records an average nighttime temperature of 14.6°C (58.3°F).Humidity
The average relative humidity in May is 64%.Rainfall
In Okayama, in May, it is raining for 14 days, with typically 125mm (4.92") of accumulated precipitation. Throughout the year, there are 189 rainfall days, and 1106mm (43.54") of precipitation is accumulated.Snowfall
April through December are months without snowfall.Sea temperature
In May, the average sea temperature is 17.6°C (63.7°F).Note: Swimming in water at 17.6°C (63.7°F) is not a pleasurable experience for most. The task of managing breathing becomes more challenging as the water temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
The average length of the day in May is 13h and 58min.On the first day of the month, sunrise is at 05:13 and sunset at 18:49. On the last day of May, sunrise is at 04:52 and sunset at 19:11 JST.
Sunshine
In Okayama, the average sunshine in May is 6.5h.UV index
In Okayama, the average daily maximum UV index in May is 9. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In May, a daily UV index of 9 turns into the following recommendations:
Without proper safety measures, skin and eyes can be quickly harmed. Be sure to protect yourself. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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Average temperature in May
Okayama, Japan
- Average high temperature in May: 24.4°C
The warmest month (with the highest average high temperature) is August (32.7°C).
The month with the lowest average high temperature is January (9°C).
- Average low temperature in May: 14.6°C
The month with the highest average low temperature is August (24.7°C).
The coldest month (with the lowest average low temperature) is January (1.1°C).
Average humidity in May
Okayama, Japan
- Average humidity in May: 64%
The month with the highest relative humidity is July (73%).
The month with the lowest relative humidity is April (60%).
Average rainfall in May
Okayama, Japan
- Average rainfall in May: 125mm
The wettest month (with the highest rainfall) is June (171.5mm).
The driest month (with the least rainfall) is December (31mm).
Average rainfall days in May
Okayama, Japan
- Average rainfall days in May: 14 days
The months with the highest number of rainy days are January and March (18 days).
The month with the least rainy days is August (13 days).
Average snowfall in May
Okayama, Japan
- Average snowfall in May: 0mm
The months with the highest snowfall are January, February and March (10mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average sea temperature in May
Okayama, Japan
- Average sea temperature in May: 17.6°C
The best month for swimming (with the highest average sea temperature) is August (27.2°C).
The coldest month (with the lowest average sea temperature) is February (13.3°C).
Average daylight in May /
Average sunshine in May
Okayama, Japan
- Average daylight in May: 14h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in May: 6h and 3min
The month with the most sunshine is August (Average sunshine: 6h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average UV index in May
Okayama, Japan
- Average UV index in May: 9
The month with the highest UV index is July (UV index 11).
The month with the lowest UV index is December (UV index 2).
