Koya weather live forecast

Today's maximum temperature in Koya is expected to be 23°C. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

Sunday
21st Jun
23

16

4

8
Monday
22nd Jun
20

15

2

6
Tuesday
23rd Jun
21

14

3

7
Wednesday
24th Jun
20

13

3

4
Thursday
25th Jun
21

14

0

6

5-day weather forecast updated at 04:02 on Saturday 20th June 2026 GMT

More about Koya

Koya by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Japan

Fred Olsen: Top cruise offers for 2026/2027

Sale

Explore latest offers on Fred Olsen Cruises in 2026/2027
Find last minute deals or early bird discounts
Filter offers by price, destination, ship & departure point

Go to Fred Olsen deal >>

View all Fred Olsen offers

Cruise deal finder

Destination

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 Sunday 21st June 2026

Expect isolated thunderstorms in Koya, Japan with a maximum temperature of 23°C, maximum UV of 8 (Very High) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 45% chance of some rain and a light breeze of 12 kph from the west.

23
°C maximum temperature
16
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
8
UV index (Very High)
45
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
12
kph wind from W

Koya weather for Monday 22nd June 2026

Expect mostly cloudy with light rain in Koya, Japan with a maximum temperature of 20°C, maximum UV of 6 (High) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 38% chance of some rain and a light breeze of 10 kph from the north-west.

20
°C maximum temperature
15
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
6
UV index (High)
38
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
10
kph wind from NW

Koya weather for Tuesday 23rd June 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 21°C, maximum UV of 7 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the north.

21
°C maximum temperature
14
°C minimum temperature
broken clouds
3
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
21
°C wind chill
6
kph wind from N

Koya weather for Wednesday 24th June 2026

Expect broken clouds in Koya, Japan with a maximum temperature of 20°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the east.

20
°C maximum temperature
13
°C minimum temperature
broken clouds
3
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
20
°C wind chill
6
kph wind from E

Koya weather for Thursday 25th June 2026

Expect cloudy with some rain in Koya, Japan with a maximum temperature of 21°C, maximum UV of 6 (High) and no hours of bright sunshine. There are 40-50 mm of rainfall expected with 79% chance of some rain and little or no wind of 6 kph from the south-east.