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.

Tuesday
8th Sep
23

20

0

4
Wednesday
9th Sep
24

19

0

4
Thursday
10th Sep
21

18

0

5
Friday
11th Sep
22

18

0

7
Saturday
12th Sep
23

19

2

5

5-day weather forecast updated at 04:03 on Tuesday 8th 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 Tuesday 8th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 23°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 40-50 mm of rainfall expected with 100% chance of some rain and little or no wind of 5 kph from the south-east.

23
°C maximum temperature
20
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
4
UV index (Moderate)
100
% chance of some rain
<50
mm of rainfall expected
23
°C wind chill
5
kph wind from SE

Koya weather for Wednesday 9th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 24°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 20-30 mm of rainfall expected with 93% chance of some rain and little or no wind of 4 kph from the south.

24
°C maximum temperature
19
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
4
UV index (Moderate)
93
% chance of some rain
<30
mm of rainfall expected
0
no heat & humidity
4
kph wind from S

Koya weather for Thursday 10th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 80% chance of some rain and little or no wind of 4 kph from the east.

21
°C maximum temperature
18
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
5
UV index (Moderate)
80
% chance of some rain
<20
mm of rainfall expected
21
°C wind chill
4
kph wind from E

Koya weather for Friday 11th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 22°C, maximum UV of 7 (High) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 87% chance of some rain and little or no wind of 3 kph from the south-east.

22
°C maximum temperature
18
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
7
UV index (High)
87
% chance of some rain
<20
mm of rainfall expected
22
°C wind chill
3
kph wind from SE

Koya weather for Saturday 12th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 23°C, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 5-10 mm of rainfall expected with 87% chance of some rain and little or no wind of 4 kph from the south-east.