Nagano in April: weather, what to wear and what's on

Averages for 1991–2020 at the JMA's Nagano station (418 m above sea level).

High

17.4°C (63°F)

Low

4.9°C (41°F)

Precipitation

56.9 mm

Wet days

8.3 days

Sunshine

199 hours

• Highs rise 7.1°C from March and climb another 5.8°C into May.
• That is 0.4°C below Nagano's yearly average high of 17.8°C.
• Of our 34 places with temperature records, Nagano is the 14th coldest in April: 0.2°C cooler than Toyama and 0.1°C warmer than Kanazawa.
• April is Nagano's 5th driest month (56.9 mm).
• Of our 35 places, Nagano has the 2nd lowest precipitation in April: 11.8 mm less than Aomori and 2.3 mm more than Sapporo.
• Rain or snow of 1 mm or more falls on 8.3 days, and 10 mm or more on 2.3 days.
• The temperature drops below 0°C on 3.1 nights.
• 2 cm of snow falls in an average April.
• Snow or sleet falls on 3.2 days.
• The sun is out for 40% or more of the possible hours on 19.2 days, and 2.5 days have under 0.1 hours of sunshine.
• On 15 April 2027 the sun rises at 5:14 and sets at 18:21 in Nagano, giving 13 hours 7 minutes of daylight (NAOJ).

Average temperature

10.6°C (51°F)

Humidity

61%

Days of 25°C or more

1.9 days

Deepest snow (average of each year's deepest)

1 cm

Early, mid and late April

By the last ten days of April the average high in Nagano is 4.4°C higher than in the first ten.

Cool: highs around 17.4°C

• Long sleeves with a light jacket or sweater.
• Gloves and a hat for mornings and nights: the temperature drops below 0°C on 3.1 nights.
• Layers you can take off: afternoons are 12.5°C warmer than early mornings on average.
• A folding umbrella: rain or snow falls on 8.3 days.

Shoes

• Shoes with good grip: snow or sleet falls on 3.2 days.

Pack

• Folding umbrella
• Gloves and a warm hat

• Our clothing rules

Cherry blossom

The JMA's sample cherry tree in Nagano opens around 11 April and is in full bloom around 16 April in an average year (1991–2020). In 2026 it opened on 31 March and was in full bloom on 6 April.

Dates are for one sample tree at or near the JMA observatory, not for every park in the city.

National holidays in April 2027:

• Thu 29 April — Showa Day

In April 2025, hotels and inns across Nagano Prefecture were 33.3% full on average (10th busiest of 12 months). Foreign guests spent 195,240 nights there that month (Japan Tourism Agency). That compares with 32.9% in March and 38.0% in May.

• Japan in April: visitor numbers and busy travel days
• Holidays in April
• Golden Week