Koya weather live forecast

Today's maximum temperature in Koya is expected to be 23°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

Thursday
13th Aug
23

19

5

6
Friday
14th Aug
26

19

6

7
Saturday
15th Aug
25

19

6

5
Sunday
16th Aug
25

19

6

9
Monday
17th Aug
26

18

8

9

5-day weather forecast updated at 04:03 on Wednesday 12th August 2026 GMT

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The 5-day weather forecast for Japan (Koya) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Koya weather forecast by day

Below are the detailed weather forecasts for Koya for the next 5 days.

Koya weather for Thursday 13th August 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 23°C, maximum UV of 6 (High) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 77% chance of some rain and a light breeze of 8 kph from the south-east.

23
°C maximum temperature
19
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
6
UV index (High)
77
% chance of some rain
<5
mm of rainfall expected
23
°C wind chill
8
kph wind from SE

Koya weather for Friday 14th August 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 92% chance of some rain and little or no wind of 4 kph from the south-east.

26
°C maximum temperature
19
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
7
UV index (High)
92
% chance of some rain
<10
mm of rainfall expected
L
low heat & humidity
4
kph wind from SE

Koya weather for Saturday 15th August 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 25°C, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 83% chance of some rain and little or no wind of 6 kph from the south-east.

25
°C maximum temperature
19
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
5
UV index (Moderate)
83
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
6
kph wind from SE

Koya weather for Sunday 16th August 2026

Expect sunshine and showers in Koya, Japan with a maximum temperature of 25°C, maximum UV of 9 (Very High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 53% chance of some rain and little or no wind of 6 kph from the south-east.

25
°C maximum temperature
19
°C minimum temperature
sunshine and showers
6
hours of sunshine
9
UV index (Very High)
53
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
6
kph wind from SE

Koya weather for Monday 17th August 2026

Expect scattered clouds in Koya, Japan with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 9 (Very High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the south.