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.

Thursday
25th Jun
20

17

0

1
Friday
26th Jun
21

19

1

4
Saturday
27th Jun
21

17

1

5
Sunday
28th Jun
23

16

1

9
Monday
29th Jun
24

17

6

10

5-day weather forecast updated at 04:03 on Thursday 25th 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 Thursday 25th June 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 20°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 30-40 mm of rainfall expected with 100% chance of some rain and a light breeze of 8 kph from the south.

20
°C maximum temperature
17
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
1
UV index (Low)
100
% chance of some rain
<40
mm of rainfall expected
0
no heat & humidity
8
kph wind from S

Koya weather for Friday 26th June 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 21°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 50 mm or more of rainfall expected with 100% chance of some rain and a light breeze of 9 kph from the south-west.

21
°C maximum temperature
19
°C minimum temperature
isolated thunderstorms
1
hour of sunshine
4
UV index (Moderate)
100
% chance of some rain
>50
mm or more of rainfall expected
0
no heat & humidity
9
kph wind from SW

Koya weather for Saturday 27th June 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 1 hour of bright sunshine. There are 50 mm or more of rainfall expected with 75% chance of some rain and a light breeze of 8 kph from the north.

21
°C maximum temperature
17
°C minimum temperature
isolated thunderstorms
1
hour of sunshine
5
UV index (Moderate)
75
% chance of some rain
>50
mm or more of rainfall expected
0
no heat & humidity
8
kph wind from N

Koya weather for Sunday 28th June 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 23°C, maximum UV of 9 (Very High) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 38% chance of some rain and little or no wind of 4 kph from the north-west.

23
°C maximum temperature
16
°C minimum temperature
isolated thunderstorms
1
hour of sunshine
9
UV index (Very High)
38
% chance of some rain
<2
mm of rainfall expected
23
°C wind chill
4
kph wind from NW

Koya weather for Monday 29th June 2026

Expect sunshine and showers in Koya, Japan with a maximum temperature of 24°C, maximum UV of 10 (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 4 kph from the north-west.