April
Weather in April
Temperature
The arrival of April in Okayama brings a temperature shift, with the average high-temperature escalating from a moderate 13.3°C (55.9°F) in March to an enjoyable 19.6°C (67.3°F). An average nighttime temperature of 9.6°C (49.3°F) is observed in Okayama during April.Humidity
April is the least humid month, with an average relative humidity of 60%.Rainfall
In Okayama, in April, it is raining for 15 days, with typically 92mm (3.62") of accumulated precipitation. Throughout the year, there are 189 rainfall days, and 1106mm (43.54") of precipitation is accumulated.Snowfall
In Okayama, snow does not fall in April through December.Sea temperature
In Okayama, the average seawater temperature in April is 15°C (59°F).Note: Most people do not find swimming enjoyable in water of 15°C (59°F). The task of controlling breathing becomes tougher as the temperature drops from 21°C (69.8°F) to 15°C (59°F).
Daylight
The average length of the day in April is 13h and 4min.On the first day of the month, sunrise is at 05:50 and sunset at 18:25. On the last day of April, sunrise is at 05:14 and sunset at 18:48 JST.
Sunshine
The average sunshine in April is 6.3h.UV index
The average daily maximum UV index in April is 8. A UV Index estimate of 8 to 10 represents a very high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 8 in April translates into these instructions:
Always be cautious. Skin and eyes can be affected swiftly without protection. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
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Average temperature in April
Okayama, Japan
- Average high temperature in April: 19.6°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 April: 9.6°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 April
Okayama, Japan
- Average humidity in April: 60%
The month with the highest relative humidity is July (73%).
The month with the lowest relative humidity is April (60%).
Average rainfall in April
Okayama, Japan
- Average rainfall in April: 92.3mm
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 April
Okayama, Japan
- Average rainfall days in April: 15 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 April
Okayama, Japan
- Average snowfall in April: 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 April
Okayama, Japan
- Average sea temperature in April: 15°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 April /
Average sunshine in April
Okayama, Japan
- Average daylight in April: 13h and 1min
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 April: 6h and 2min
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 April
Okayama, Japan
- Average UV index in April: 8
The month with the highest UV index is July (UV index 11).
The month with the lowest UV index is December (UV index 2).
