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Weather in Kōyasan for May 2027

Your guide to Kōyasan weather in May - trends and predictions

    Temperatures

  • In general, the average temperature in Kōyasan at the beginning of May is 19.6 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 21.9 °C by the end of May.

    • Rain 🌧️

  • Kōyasan experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 227 mm.

    • More

  • Is May 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
8
Dry days
Average rainy days
23
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/11°
Temperatures
Average wind speed
12 km/h
Avg max wind
Average humidity
77 %
Avg humidity

Kōyasan Weather May

Move between months or click on a day
April
June
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Cloudy
20°
2
Moderate or heavy rain shower
19°
3
Partly cloudy
21°
4
Patchy rain possible
19°
5
Overcast
20°
6
Moderate or heavy rain shower
17°
7
Overcast
21°
8
Overcast
22°
9
Moderate or heavy rain shower
18°
10
Heavy rain at times
22°
11
Patchy rain possible
20°
12
Patchy rain possible
21°
13
Sunny
23°
14
Overcast
24°
15
Cloudy
25°
16
Moderate rain at times
25°
17
Moderate or heavy rain shower
25°
18
Heavy rain at times
28°
19
Cloudy
25°
20
Partly cloudy
27°
21
Moderate or heavy rain shower
27°
22
Moderate rain at times
24°
23
Partly cloudy
23°
24
Moderate or heavy rain shower
21°
25
Light rain shower
22°
26
Overcast
23°
27
Light rain shower
21°
28
Light rain shower
24°
29
Light rain shower
23°
30
Light rain shower
20°
31
Light rain shower
20°

Temperatures trend during May in Kōyasan

See the weather trend as well as the moving average line

May weather in Kōyasan day by day

Click on a date for more information
April June
Date Weather Temperatures Rain UV More
1 May Cloudy
Cloudy
 20° /9° 12.4 mm 4
2 May Moderate or heavy rain shower
Moderate or heavy rain shower
 19° /10° 17 mm 7
3 May Partly cloudy
Partly cloudy
 21° /9° 4.5 mm 6
4 May Patchy rain possible
Patchy rain possible
 19° /9° 5 mm 4
5 May Overcast
Overcast
 20° /6° 0 mm 8
6 May Moderate or heavy rain shower
Moderate or heavy rain shower
 17° /10° 18.2 mm 5
7 May Overcast
Overcast
 21° /11° 2.2 mm 5
8 May Overcast
Overcast
 22° /7° 0.4 mm 7
9 May Moderate or heavy rain shower
Moderate or heavy rain shower
 18° /9° 10.6 mm 7
10 May Heavy rain at times
Heavy rain at times
 22° /10° 5.8 mm 8
11 May Patchy rain possible
Patchy rain possible
 20° /9° 3.4 mm 7
12 May Patchy rain possible
Patchy rain possible
 21° /10° 2.4 mm 6
13 May Sunny
Sunny
 23° /11° 1.1 mm 5
14 May Overcast
Overcast
 24° /11° 0.2 mm 8
15 May Cloudy
Cloudy
 25° /10° 0 mm 8
16 May Moderate rain at times
Moderate rain at times
 25° /11° 0.7 mm 8
17 May Moderate or heavy rain shower
Moderate or heavy rain shower
 25° /14° 10 mm 8
18 May Heavy rain at times
Heavy rain at times
 28° /15° 1.1 mm 8
19 May Cloudy
Cloudy
 25° /14° 0 mm 8
20 May Partly cloudy
Partly cloudy
 27° /15° 3.2 mm 6
21 May Moderate or heavy rain shower
Moderate or heavy rain shower
 27° /19° 18.3 mm 6
22 May Moderate rain at times
Moderate rain at times
 24° /16° 12.2 mm 4
23 May Partly cloudy
Partly cloudy
 23° /14° 0.8 mm 8
24 May Moderate or heavy rain shower
Moderate or heavy rain shower
 21° /15° 22.9 mm 6
25 May Light rain shower
Light rain shower
 22° /11° 7.9 mm 8
26 May Overcast
Overcast
 23° /10° 0 mm 8
27 May Light rain shower
Light rain shower
 21° /12° 6 mm 6
28 May Light rain shower
Light rain shower
 24° /14° 3.3 mm 4
29 May Light rain shower
Light rain shower
 23° /11° 7.5 mm 6
30 May Light rain shower
Light rain shower
 20° /10° 12.7 mm 7
31 May Light rain shower
Light rain shower
 20° /12° 6 mm 7
Next
Important Notice
Our weather forecast for Kōyasan in May 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.
Change Month
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Kōyasan weather in May vs April vs June

Compare May weather in Kōyasan with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AprilMayJune
WeatherPatchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Temperatures18°/7°21°/11°26°/16°
Rainfall150 mm227 mm182 mm
Wind13.6 km/h12.2 km/h11.2 km/h
Humidity70%77%78%
Rainy days18 days23 days14 days
Dry days12 days8 days16 days

Planning a trip to Kōyasan? Discover the best time to visit

Kōyasan in May - FAQ

What are the expected maximum and minimum temperatures in Kōyasan during May?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Kōyasan during May?
Significant rainfall exceeding 227 mm is expected in Kōyasan during May, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Kōyasan during May?
The average wind speed in Kōyasan during May is 12 km/h, suggesting breezy to windy conditions, depending on your activities.

May rainfall patterns in Kōyasan

Explore the daily rainfall trends and prepare for Kōyasans May weather 💧
Typically, Kōyasan has 23 rainy days in May with a total of 227 mm of rainfall.

UV exposure in Kōyasan during May

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

What to pack to Kōyasan in May?

🌦️ Mild & changeable · highs around 21 °C, frequent showers

As you prepare for your trip to Kōyasan in May, 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 May, is comfortable and enjoyable, regardless of the weather conditions.

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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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