Koya weather live forecast

Today's maximum temperature in Koya is expected to be 22°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

Friday
18th Sep
22

17

5

6
Saturday
19th Sep
24

16

5

5
Sunday
20th Sep
22

19

3

6
Monday
21st Sep
20

16

0

5
Tuesday
22nd Sep
21

15

4

7

5-day weather forecast updated at 04:02 on Friday 18th September 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 Friday 18th September 2026

Expect sunshine and showers in Koya, Japan with a maximum temperature of 22°C, maximum UV of 6 (High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 21% chance of some rain and little or no wind of 5 kph from the south-east.

22
°C maximum temperature
17
°C minimum temperature
sunshine and showers
5
hours of sunshine
6
UV index (High)
21
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
5
kph wind from SE

Koya weather for Saturday 19th September 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 24°C, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the east.

24
°C maximum temperature
16
°C minimum temperature
broken clouds
5
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
5
kph wind from E

Koya weather for Sunday 20th September 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 22°C, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 53% chance of some rain and a light breeze of 10 kph from the north.

22
°C maximum temperature
19
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
6
UV index (High)
53
% chance of some rain
<5
mm of rainfall expected
22
°C wind chill
10
kph wind from N

Koya weather for Monday 21st September 2026

Expect cloudy with some rain in Koya, Japan with a maximum temperature of 20°C, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 64% chance of some rain and a light breeze of 12 kph from the north.

20
°C maximum temperature
16
°C minimum temperature
cloudy with some rain
0
hours of sunshine
5
UV index (Moderate)
64
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
12
kph wind from N

Koya weather for Tuesday 22nd September 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 21°C, maximum UV of 7 (High) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the north.