Mount Haku Weather in May
May in Mount Haku brings pleasant temperatures, with highs of 20°C (68°F) and nights dropping to 9°C (48°F). The rainy season is in full swing this month, so frequent downpours are part of the picture.
Rainfall in Mount Haku in May
Mount Haku is in the rainy season in May, with rain on around 17 days and an average of 210 mm (8.3 in). Rainfall this month is frequent and tends to be fairly heavy when it does fall. Packing waterproofs is a good idea.
Temperature in Mount Haku in May
May in Mount Haku brings pleasant temperatures, with highs of 20°C (68°F) and nights around 9°C (48°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. At 9°C (48°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Mount Haku in May
The days are predominantly sunny, with an estimated total of around 192 hours of sunshine. Rain is often only seen in the afternoon or evening, leaving clear skies for most of the day. This results in rainy months that still feel bright and are suitable for travel.If you're a fan of comfortable temperatures and drier conditions, May is a great time to visit.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Mount Haku's climate page.
Mount Haku Temperature in May
Min Temperature
9°C (48°F)
Max Temperature
20°C (68°F)
Chance of Rain
57%
Precipitation
210 mm (8.3 in)
Rainy days
17 days
Humidity
68% *
Sunshine
192 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Mount Haku typically stay consistent throughout May, with daily highs averaging around 20°C (68°F). Nights are cool, with lows typically ranging from 10°C (50°F) to 15°C (59°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Mount Haku in May
Browse day-by-day weather records for Mount Haku spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Mount Haku historical weather extremes in May
Our historical data for Mount Haku spans 1976 to 2026, revealing these weather extremes.
- On May 30, 2017, temperatures climbed to 31°C (88°F), marking the warmest May day on record.
- Mount Haku experienced its chilliest May day on May 3, 1991, reaching only 10°C (50°F).
- The coldest night in May in Mount Haku was on May 5, 1991, with a minimum of 2°C (36°F).
- The wettest May day on record brought 125 mm (4.9 in) of precipitation to Mount Haku (May 28, 2024).
Best Places in Japan in May
Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in May →
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What to Wear in Mount Haku in May
Comfortable temperatures call for an easy wardrobe in May. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. It's going to pour! Pack a good poncho and prepare for very wet conditions. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Mount Haku in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Mount Haku's climate page.
Temperature Rainfall Sunshine Humidity
See the full Mount Haku climate overview or explore weather in Japan.
