Koya weather live forecast

Today's maximum temperature in Koya is expected to be 28°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

Friday
10th Jul
28

17

8

9
Saturday
11th Jul
27

19

5

8
Sunday
12th Jul
26

20

3

3
Monday
13th Jul
25

21

3

8
Tuesday
14th Jul
27

21

6

9

5-day weather forecast updated at 04:03 on Thursday 9th July 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 10th July 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 9 (Very High) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 7% chance of some rain and little or no wind of 4 kph from the south-east.

28
°C maximum temperature
17
°C minimum temperature
isolated thunderstorms
8
hours of sunshine
9
UV index (Very High)
7
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
4
kph wind from SE

Koya weather for Saturday 11th July 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 8 (Very High) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 4 kph from the south-east.

27
°C maximum temperature
19
°C minimum temperature
broken clouds
5
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
L
low heat & humidity
4
kph wind from SE

Koya weather for Sunday 12th July 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the north-west.

26
°C maximum temperature
20
°C minimum temperature
broken clouds
3
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
5
kph wind from NW

Koya weather for Monday 13th July 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 25°C, maximum UV of 8 (Very High) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 49% chance of some rain and little or no wind of 6 kph from the north-west.

25
°C maximum temperature
21
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
8
UV index (Very High)
49
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
6
kph wind from NW

Koya weather for Tuesday 14th July 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 9 (Very High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the north.