April weather forecast
Okayama, Japan

April signifies the heart of spring in Okayama with temperatures taking a substantial leap up to 19.6°C (67.3°F). This period experiences the highest rainfall of the year, peaking at 92mm (3.62") which keeps the landscape fresh and vibrant. The extended daylight of about 13.1 hours creates an atmosphere suitable for sightseeing and outdoor activities. However, lower night temperatures around 9.6°C (49.3°F) still warrant a light jacket during the evenings. A hike around Koraku-en park during this time reveals how the city morphs into a colorful symphony of blooming flowers.

Temperature

As March gives way to April, the average high-temperature in Okayama, Japan, displays an increase, moving from a mild 13.3°C (55.9°F) to a still refreshing 19.6°C (67.3°F). Okayama records an average nighttime low of 9.6°C (49.3°F) in April.

Humidity

With an average relative humidity of 60%, April is the least humid month in Okayama.

Rainfall

In April, in Okayama, the rain falls for 15 days. Throughout April, 92mm (3.62") of precipitation is accumulated. 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, in April, the average water temperature is 15°C (59°F).
Note: Swimming is not enjoyable for most people in water that is 15°C (59°F). As the temperature descends from 21°C (69.8°F) to 15°C (59°F), breathing control becomes harder.

Daylight

The average length of the day in April in Okayama, Japan, is 13h and 4min.
On the first day of April, sunrise is at 05:50 and sunset at 18:25. On the last day of the month, sunrise is at 05:14 and sunset at 18:48 JST.

Sunshine

The average sunshine in April is 6.3h.

UV index

In April, the average daily maximum UV index is 8. A UV Index of 8 to 10 symbolizes a very high health hazard from unsafe exposure to UV radiation for average individuals.
Note: In April, the maximum UV index of 8 suggests these recommendations:
Ensure safety measures are in place, as skin and eyes are vulnerable to quick damage. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.