Koya weather live forecast

Today's maximum temperature in Koya is expected to be 20°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

Sunday
6th Sep
20

18

1

3
Monday
7th Sep
22

19

0

4
Tuesday
8th Sep
24

20

3

6
Wednesday
9th Sep
24

19

4

6
Thursday
10th Sep
23

19

2

3

5-day weather forecast updated at 04:02 on Saturday 5th September 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 Sunday 6th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 20°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 83% chance of some rain and a light breeze of 11 kph from the east.

20
°C maximum temperature
18
°C minimum temperature
isolated thunderstorms
1
hour of sunshine
3
UV index (Moderate)
83
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
11
kph wind from E

Koya weather for Monday 7th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 22°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 20-30 mm of rainfall expected with 83% chance of some rain and a light breeze of 7 kph from the south-east.

22
°C maximum temperature
19
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
4
UV index (Moderate)
83
% chance of some rain
<30
mm of rainfall expected
22
°C wind chill
7
kph wind from SE

Koya weather for Tuesday 8th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 24°C, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 10-20 mm of rainfall expected with 70% chance of some rain and little or no wind of 4 kph from the south.

24
°C maximum temperature
20
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
6
UV index (High)
70
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
4
kph wind from S

Koya weather for Wednesday 9th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 24°C, maximum UV of 6 (High) and 4 hours of bright sunshine. There are 10-20 mm of rainfall expected with 79% chance of some rain and little or no wind of 6 kph from the south-west.

24
°C maximum temperature
19
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
6
UV index (High)
79
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
6
kph wind from SW

Koya weather for Thursday 10th September 2026

Expect mostly cloudy with rain in Koya, Japan with a maximum temperature of 23°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 10-20 mm of rainfall expected with 83% chance of some rain and little or no wind of 5 kph from the south.