Koya weather live forecast

Today's maximum temperature in Koya is expected to be 43°F. Select a day from the live weather forecast for Koya, Japan for more weather parameters.

Sunday
14th Dec
43

32

4

3
Monday
15th Dec
37

28

1

2
Tuesday
16th Dec
45

28

10

2
Wednesday
17th Dec
48

30

5

2
Thursday
18th Dec
48

34

6

2

5-day weather forecast updated at 04:05 on Friday 12th December 2025 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 Sunday 14th December 2025

Expect mostly cloudy with light rain in Koya, Japan with a maximum temperature of 43°F, maximum UV of 3 (Moderate) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 59% chance of some rain and a gentle breeze of 9 mph from the north-west.

43
°F maximum temperature
32
°F minimum temperature
mostly cloudy with light rain
4
hours of sunshine
3
UV index (Moderate)
59
% chance of some rain
<5
mm of rainfall expected
37
°F wind chill
9
mph wind from NW

Koya weather for Monday 15th December 2025

Expect mostly cloudy with light snow in Koya, Japan with a maximum temperature of 37°F, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 0-2 cm of snow expected with 52% chance of some snow and a light breeze of 7 mph from the north-west.

37
°F maximum temperature
28
°F minimum temperature
mostly cloudy with light snow
1
hour of sunshine
2
UV index (Low)
52
% chance of some snow
<2
cm of snow expected
32
°F wind chill
7
mph wind from NW

Koya weather for Tuesday 16th December 2025

Expect clear skies in Koya, Japan with a maximum temperature of 45°F, maximum UV of 2 (Low) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 3 mph from the west.

45
°F maximum temperature
28
°F minimum temperature
clear skies
10
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
43
°F wind chill
3
mph wind from W

Koya weather for Wednesday 17th December 2025

Expect broken clouds in Koya, Japan with a maximum temperature of 48°F, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 4 mph from the south-west.

48
°F maximum temperature
30
°F minimum temperature
broken clouds
5
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
46
°F wind chill
4
mph wind from SW

Koya weather for Thursday 18th December 2025

Expect scattered clouds in Koya, Japan with a maximum temperature of 48°F, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 3 mph from the north-east.