Koya weather live forecast

Today's maximum temperature in Koya is expected to be 21°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

Tuesday
23rd Jun
21

15

3

5
Wednesday
24th Jun
19

15

0

3
Thursday
25th Jun
20

16

0

2
Friday
26th Jun
23

16

3

4
Saturday
27th Jun
23

15

7

3

5-day weather forecast updated at 04:03 on Monday 22nd June 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 23rd June 2026

Expect mostly cloudy with light rain in Koya, Japan with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 8% chance of some rain and little or no wind of 5 kph from the north.

21
°C maximum temperature
15
°C minimum temperature
mostly cloudy with light rain
3
hours of sunshine
5
UV index (Moderate)
8
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
5
kph wind from N

Koya weather for Wednesday 24th June 2026

Expect mostly cloudy with rain in Koya, Japan with a maximum temperature of 19°C, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 78% chance of some rain and a light breeze of 7 kph from the south-east.

19
°C maximum temperature
15
°C minimum temperature
mostly cloudy with rain
0
hours of sunshine
3
UV index (Moderate)
78
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
7
kph wind from SE

Koya weather for Thursday 25th June 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 20°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 50 mm or more of rainfall expected with 99% chance of some rain and a light breeze of 8 kph from the south-east.

20
°C maximum temperature
16
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
2
UV index (Low)
99
% chance of some rain
>50
mm or more of rainfall expected
0
no heat & humidity
8
kph wind from SE

Koya weather for Friday 26th June 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 23°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 20-30 mm of rainfall expected with 71% chance of some rain and little or no wind of 6 kph from the west.

23
°C maximum temperature
16
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
4
UV index (Moderate)
71
% chance of some rain
<30
mm of rainfall expected
23
°C wind chill
6
kph wind from W

Koya weather for Saturday 27th June 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 23°C, maximum UV of 3 (Moderate) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 55% chance of some rain and little or no wind of 6 kph from the north-west.