Is Nagano hot in April?
Days are typically cool at 17.5°C, while nights average 4.2°C.
Japan · 1991–2020 normal
Typical April weather in Nagano: 17.5°C by day, 4.2°C at night, 67 mm of rain over 8.9 wet days. These are measured 1991–2020 station normals, not a forecast.
In the year-round weather comparison, April scores 49 out of 100 (May leads the year at 78). Daylight is calculated as 13 h 05 from latitude 36.65°.
April at a glance
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Days are typically cool at 17.5°C, while nights average 4.2°C.
The measured monthly average is 67 mm across about 9 wet days.
There are about 13 h 05 between sunrise and sunset at mid-month, calculated from the place latitude.
April ranks 5 of 12 in our weather comparison; May ranks first.
Event window
This is the typical bloom window in Japan, not a flower count from the weather station. The measured April normal here is 17.5°C by day and 4.2°C at night, with 67 mm of rain.
The evidence behind this page
Next step
The weather comparison for Nagano is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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