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.

Wednesday
1st Jul
21

16

0

7
Thursday
2nd Jul
21

18

2

4
Friday
3rd Jul
22

18

6

6
Saturday
4th Jul
24

17

3

5
Sunday
5th Jul
22

18

3

9

5-day weather forecast updated at 04:03 on Tuesday 30th 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 Wednesday 1st July 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 21°C, maximum UV of 7 (High) and no hours of bright sunshine. There are 20-30 mm of rainfall expected with 88% chance of some rain and little or no wind of 5 kph from the south.

21
°C maximum temperature
16
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
7
UV index (High)
88
% chance of some rain
<30
mm of rainfall expected
0
no heat & humidity
5
kph wind from S

Koya weather for Thursday 2nd July 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 21°C, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 30-40 mm of rainfall expected with 93% chance of some rain and a light breeze of 10 kph from the south-west.

21
°C maximum temperature
18
°C minimum temperature
isolated thunderstorms
2
hours of sunshine
4
UV index (Moderate)
93
% chance of some rain
<40
mm of rainfall expected
0
no heat & humidity
10
kph wind from SW

Koya weather for Friday 3rd July 2026

Expect mostly cloudy with light rain in Koya, Japan with a maximum temperature of 22°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 37% chance of some rain and little or no wind of 6 kph from the west.

22
°C maximum temperature
18
°C minimum temperature
mostly cloudy with light rain
6
hours of sunshine
6
UV index (High)
37
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
6
kph wind from W

Koya weather for Saturday 4th July 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 24°C, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 55% chance of some rain and little or no wind of 5 kph from the west.

24
°C maximum temperature
17
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
5
UV index (Moderate)
55
% chance of some rain
<2
mm of rainfall expected
24
°C wind chill
5
kph wind from W

Koya weather for Sunday 5th July 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 22°C, maximum UV of 9 (Very High) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 71% chance of some rain and little or no wind of 5 kph from the west.