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Weather in Kōyasan for April 2026

Your guide to Kōyasan weather in April - trends and predictions

    Temperatures

  • In general, the average temperature in Kōyasan at the beginning of April is 14.3 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 18.7 °C by the end of April.

    • Rain 🌧️

  • The climate of Kōyasan in April is notably wet, with an average of 14 rainy days, and a total of 111.5 mm of precipitation.

    • More

  • Is April a good time to visit Kōyasan? check out the best time to travel to Kōyasan page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
16
Dry days
Average rainy days
14
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/7°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
68 %
Avg humidity

Kōyasan Weather April

Move between months or click on a day
March
May
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Overcast
13°
2
Moderate or heavy rain shower
15°
3
Moderate rain at times
13°
4
Patchy rain possible
12°
5
Overcast
16°
6
Moderate or heavy rain shower
16°
7
Sunny
15°
8
Patchy rain possible
20°
9
Overcast
17°
10
Patchy rain possible
20°
11
Moderate or heavy rain shower
18°
12
Partly cloudy
19°
13
Moderate or heavy rain shower
16°
14
Moderate or heavy rain shower
17°
15
Moderate or heavy rain shower
10°
16
Sunny
16°
17
Sunny
22°
18
Heavy rain at times
23°
19
Overcast
25°
20
Overcast
21°
21
Sunny
22°
22
Overcast
23°
23
Moderate or heavy rain shower
22°
24
Cloudy
22°
25
Cloudy
17°
26
Sunny
17°
27
Overcast
22°
28
Moderate or heavy rain shower
17°
29
Patchy rain possible
15°
30
Sunny
21°

Temperatures trend during April in Kōyasan

See the weather trend as well as the moving average line

April weather in Kōyasan day by day

Click on a date for more information
March May
Date Weather Temperatures Rain UV More
1 Apr. Overcast
Overcast
 13° /1° 0 mm 3
2 Apr. Moderate or heavy rain shower
Moderate or heavy rain shower
 15° /6° 5.2 mm 4
3 Apr. Moderate rain at times
Moderate rain at times
 13° /4° 1.3 mm 3
4 Apr. Patchy rain possible
Patchy rain possible
 12° /3° 0.4 mm 3
5 Apr. Overcast
Overcast
 16° /0° 0.1 mm 4
6 Apr. Moderate or heavy rain shower
Moderate or heavy rain shower
 16° /8° 11.9 mm 4
7 Apr. Sunny
Sunny
 15° /4° 0 mm 5
8 Apr. Patchy rain possible
Patchy rain possible
 20° /4° 0.2 mm 5
9 Apr. Overcast
Overcast
 17° /5° 0 mm 4
10 Apr. Patchy rain possible
Patchy rain possible
 20° /6° 3.8 mm 5
11 Apr. Moderate or heavy rain shower
Moderate or heavy rain shower
 18° /8° 7.6 mm 4
12 Apr. Partly cloudy
Partly cloudy
 19° /5° 0 mm 5
13 Apr. Moderate or heavy rain shower
Moderate or heavy rain shower
 16° /6° 25.5 mm 4
14 Apr. Moderate or heavy rain shower
Moderate or heavy rain shower
 17° /4° 5 mm 4
15 Apr. Moderate or heavy rain shower
Moderate or heavy rain shower
 10° /5° 10 mm 3
16 Apr. Sunny
Sunny
 16° /3° 0 mm 5
17 Apr. Sunny
Sunny
 22° /8° 0 mm 6
18 Apr. Heavy rain at times
Heavy rain at times
 23° /13° 1.1 mm 5
19 Apr. Overcast
Overcast
 25° /11° 0 mm 6
20 Apr. Overcast
Overcast
 21° /14° 0.1 mm 5
21 Apr. Sunny
Sunny
 22° /10° 0 mm 6
22 Apr. Overcast
Overcast
 23° /9° 7 mm 5
23 Apr. Moderate or heavy rain shower
Moderate or heavy rain shower
 22° /15° 18.4 mm 5
24 Apr. Cloudy
Cloudy
 22° /11° 0.1 mm 5
25 Apr. Cloudy
Cloudy
 17° /8° 0 mm 4
26 Apr. Sunny
Sunny
 17° /5° 0 mm 5
27 Apr. Overcast
Overcast
 22° /7° 0 mm 5
28 Apr. Moderate or heavy rain shower
Moderate or heavy rain shower
 17° /9° 13.5 mm 4
29 Apr. Patchy rain possible
Patchy rain possible
 15° /4° 0.3 mm 4
30 Apr. Sunny
Sunny
 21° /3° 0 mm 6
Next
Important Notice
Our weather forecast for Kōyasan in April is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Kōyasan forecast closer to your planned date for the most up-to-date weather information.
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Kōyasan in April - FAQ

What are the expected maximum and minimum temperatures in Kōyasan during April?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Kōyasan during April?
Significant rainfall exceeding 111.5 mm is expected in Kōyasan during April, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Kōyasan during April?
The average wind speed in Kōyasan during April is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Kōyasan in April?

As you prepare for your trip to Kōyasan in April, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Kōyasan, during April, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Warm Clothing: Sweaters, hoodies, long pants
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
  • Accessories
    • Scarves: To protect you from the cold wind
    • Gloves/Mittens: Essential for cold weather
    • Warm Hats: Warm hats for insulation in cold weather
    • Umbrellas/Raincoats: For rainy days

April rainfall patterns in Kōyasan

Explore the daily rainfall trends and prepare for Kōyasans April weather 💧

UV exposure in Kōyasan during April

Stay informed about UV levels for safe outdoor activities throughout the month of April ☀️

Quick links

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Location coordinates Where is Kōyasan?

Get accurate weather forecasts for Kōyasan, located at latitude 34.217 and longitude 135.583. Stay updated with localized weather information tailored for Kōyasan.

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