April weather forecastNarashino, Japan
April
Weather in April
Sea temperature
In April, the average sea temperature in Narashino, Japan, is 16.5°C (61.7°F).Note: The majority of individuals find it unpleasurable to swim in 16.5°C (61.7°F). It becomes progressively harder to manage one's breathing as the water temperature falls below 21°C (69.8°F).
Daylight
In April, the average length of the day is 13h and 6min.On the first day of April, sunrise is at 05:26 and sunset at 18:01. On the last day of the month, sunrise is at 04:48 and sunset at 18:25 JST.
Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In April, the average sea temperature in Narashino, Japan, is 16.5°C (61.7°F). For swimming, a surface water temperature of 16.5°C (61.7°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).
In April, the average day length in Narashino is 13h and 6min.
In April, on the first day of the month, sunrise is at 05:26 and sunset at 18:01. On the last day of the month, in Narashino, Japan, sunrise is at 04:48 and sunset at 18:25 JST.
Average sea temperature in April
Narashino, Japan
- Average sea temperature in April: 16.5°C
The best month for swimming (with the highest average sea temperature) is August (25.3°C).
The coldest month (with the lowest average sea temperature) is February (14.4°C).
Average daylight in April
Narashino, Japan
- Average daylight in April: 13h and 6min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).





