Koya weather live forecast

Today's maximum temperature in Koya is expected to be 25°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

Tuesday
11th Aug
25

16

7

8
Wednesday
12th Aug
21

18

0

6
Thursday
13th Aug
24

18

6

7
Friday
14th Aug
25

18

7

5
Saturday
15th Aug
25

18

3

9

5-day weather forecast updated at 04:03 on Monday 10th 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 Tuesday 11th August 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 25°C, maximum UV of 8 (Very High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north.

25
°C maximum temperature
16
°C minimum temperature
broken clouds
7
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
0
no heat & humidity
11
kph wind from N

Koya weather for Wednesday 12th August 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 21°C, maximum UV of 6 (High) and no hours of bright sunshine. There are 30-40 mm of rainfall expected with 91% chance of some rain and little or no wind of 6 kph from the south-east.

21
°C maximum temperature
18
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
6
UV index (High)
91
% chance of some rain
<40
mm of rainfall expected
0
no heat & humidity
6
kph wind from SE

Koya weather for Thursday 13th August 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 24°C, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 73% chance of some rain and little or no wind of 6 kph from the south-east.

24
°C maximum temperature
18
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
7
UV index (High)
73
% chance of some rain
<10
mm of rainfall expected
24
°C wind chill
6
kph wind from SE

Koya weather for Friday 14th August 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 25°C, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 5-10 mm of rainfall expected with 81% chance of some rain and little or no wind of 5 kph from the south-east.

25
°C maximum temperature
18
°C minimum temperature
isolated thunderstorms
7
hours of sunshine
5
UV index (Moderate)
81
% chance of some rain
<10
mm of rainfall expected
25
°C wind chill
5
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 9 (Very High) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 81% chance of some rain and little or no wind of 6 kph from the east.