Koya weather live forecast

Today's maximum temperature in Koya is expected to be 26°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

Saturday
22nd Aug
26

20

5

9
Sunday
23rd Aug
28

21

6

9
Monday
24th Aug
28

21

6

9
Tuesday
25th Aug
29

21

6

9
Wednesday
26th Aug
28

20

7

1

5-day weather forecast updated at 04:03 on Friday 21st August 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 Saturday 22nd August 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 9 (Very High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 56% chance of some rain and little or no wind of 3 kph from the north-west.

26
°C maximum temperature
20
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
9
UV index (Very High)
56
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
3
kph wind from NW

Koya weather for Sunday 23rd August 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 28°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 67% chance of some rain and little or no wind of 3 kph from the south-east.

28
°C maximum temperature
21
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
9
UV index (Very High)
67
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
3
kph wind from SE

Koya weather for Monday 24th August 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 28°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 65% chance of some rain and little or no wind of 3 kph from the south-east.

28
°C maximum temperature
21
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
9
UV index (Very High)
65
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
3
kph wind from SE

Koya weather for Tuesday 25th August 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 49% chance of some rain and little or no wind of 4 kph from the north-west.

29
°C maximum temperature
21
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
9
UV index (Very High)
49
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
4
kph wind from NW

Koya weather for Wednesday 26th August 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 70% chance of some rain and little or no wind of 6 kph from the south-east.