Click on a day for an hourly weather forecast
The weather in Nikko in August is hot. The average temperatures are between 20°C and 28°C.
You can expect rain for roughly half of the month of August in Nikko. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Nikko in August 2025.
If you’re planning to visit Nikko in the near future, we highly recommend that you review the 14 day weather forecast for Nikko before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -6° | 8 | 4 | 21 | 107 mm | Awful | Nikko in January |
| February | 5° / -5° | 9 | 4 | 17 | 102 mm | Awful | Nikko in February |
| March | 9° / -2° | 9 | 12 | 11 | 173 mm | Awful | Nikko in March |
| April | 14° / 4° | 8 | 20 | 2 | 206 mm | Bad | Nikko in April |
| May | 20° / 10° | 9 | 22 | 0 | 234 mm | Ok | Nikko in May |
| June | 23° / 15° | 13 | 17 | 0 | 343 mm | Good | Nikko in June |
| July | 27° / 20° | 17 | 14 | 0 | 403 mm | Good | Nikko in July |
| August | 28° / 20° | 14 | 17 | 0 | 342 mm | Good | Nikko in August |
| September | 24° / 15° | 10 | 20 | 0 | 301 mm | Good | Nikko in September |
| October | 18° / 8° | 7 | 24 | 0 | 272 mm | Ok | Nikko in October |
| November | 13° / 3° | 5 | 25 | 1 | 126 mm | Ok | Nikko in November |
| December | 6° / -3° | 6 | 11 | 13 | 105 mm | Awful | Nikko in December |