April 21 is generally a great time to visit Nikko. While there is a slight chance of rain (36%), showers are usually brief. Expect comfortable 17°C weather. Nikko is seeing high visitor numbers, so iconic spots may be busier than usual.
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Essential Travel Info for Nikko
Currency
JPY
¥ Japanese yen
Language
Japanese
Driving
Left side
Safety
Very High Safety
GPI: 1.336
Nikko Weather Forecast for April 21
"Mild & Comfortable. Expect average highs of 16.7°C. 36% chance of snow."
What to Wear in Nikko in April
Based on historical data for April 21, Nikko typically experiences temperatures between 6.6°C and 16.7°C. We recommend packing light jacket, long pants, umbrella to stay comfortable. With a 36% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Nikko
Smart Suitcase
- Light Jacket
- Long Pants
- Umbrella
Average High
16.7°C
Daytime Peak
Average Low
6.6°C
Nighttime Low
Feels Like
16.7°C
🌤️ Feels accurate
Snow Chance
36%
Avg 3.5mm if it snows
Snowfall
0.2 cm
~36% chance
Pressure
1014.2 hPa
Medium volatility
Nikko Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 95% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 18:00
Type I-II
🔴 21 min to burn
Type III-IV
🟡 32 min to burn
Type V-VI
🟢 53 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
12°C
Pleasant
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Japan
Flight Traffic
Busy
65/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~640
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Nikko
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:01
☀️ Noon
11:41
🌇 Sunset
18:20
⏱️ Daylight
13h 19m
Wind Speed
12.8 km/h
Gentle breeze
Sunshine
8.5 hrs
Direct Sun (Cloud-free)
Humidity
74%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Nikko
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Nikko
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Very high seismic risk. Ring of Fire territory.
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Nikko on April 21 averages 16.7°C with a 36% precipitation probability. Wedding/Outdoor Event Score: 79/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Nikko Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
April 28
17.7°C • 36% rain
Score
83
April 27
17.3°C • 38% rain
Score
81
April 26
17°C • 37% rain
Score
80
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (April 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Nikko Worth Visiting on April 21?
Planning a trip to Nikko on April 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 16.7°C with a 36% historical precipitation risk.
✈️ Travel Logistics: Approximately 640 landing slots available daily during this period, indicating peak tourist activity.
💉 Health Advisory: 8 vaccinations are recommended for Japan, including COVID-19.
📊 Historical Extremes: The hottest April 21 recorded in the last 30 years saw temperatures hit 23.8°C in 2023, while the coldest dropped to 5.4°C in 2016.