Koya weather live forecast

Today's maximum temperature in Koya is expected to be 25°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

Monday
18th May
25

11

11

9
Tuesday
19th May
24

13

5

10
Wednesday
20th May
19

14

2

6
Thursday
21st May
18

16

0

4
Friday
22nd May
19

13

0

5

5-day weather forecast updated at 04:02 on Sunday 17th May 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 Monday 18th May 2026

Expect scattered clouds in Koya, Japan with a maximum temperature of 25°C, maximum UV of 9 (Very High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the south-east.

25
°C maximum temperature
11
°C minimum temperature
scattered clouds
11
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
25
°C wind chill
5
kph wind from SE

Koya weather for Tuesday 19th May 2026

Expect mostly cloudy with light rain in Koya, Japan with a maximum temperature of 24°C, maximum UV of 10 (Very High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 31% chance of some rain and little or no wind of 4 kph from the south-east.

24
°C maximum temperature
13
°C minimum temperature
mostly cloudy with light rain
5
hours of sunshine
10
UV index (Very High)
31
% chance of some rain
<2
mm of rainfall expected
24
°C wind chill
4
kph wind from SE

Koya weather for Wednesday 20th May 2026

Expect mostly cloudy with rain in Koya, Japan with a maximum temperature of 19°C, maximum UV of 6 (High) and 2 hours of bright sunshine. There are 10-20 mm of rainfall expected with 72% chance of some rain and little or no wind of 5 kph from the south.

19
°C maximum temperature
14
°C minimum temperature
mostly cloudy with rain
2
hours of sunshine
6
UV index (High)
72
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
5
kph wind from S

Koya weather for Thursday 21st May 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 18°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 93% chance of some rain and a light breeze of 7 kph from the south.

18
°C maximum temperature
16
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
4
UV index (Moderate)
93
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
7
kph wind from S

Koya weather for Friday 22nd May 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 19°C, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 64% chance of some rain and a light breeze of 7 kph from the south-west.