Karuizawa weather in June
In June, Karuizawa sees average daytime highs of 21°C and overnight lows near 15°C, with 254 mm of rain across 22.7 wet days and about 14.4 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.
Highs climb over the month, from about 20°C in the first days to 23°C by the end. The sky is clear or mostly clear about 9% of the time in June, and the air most often feels comfortable.
Daylight stretches from about 14 h 18 min at the start of June to 14 h 30 min by month's end. Set against the rest of the year, June is Karuizawa's 12th-clearest and 10th-windiest month. For the whole year in context, see Karuizawa's year-round climate.
- Daytime high
- 21°
- 4th warmest
- Overnight low
- 15°
- 9th coldest
- Rainfall
- 254 mm
- 22.7 wet days
- Daylight
- 14 h 30 min
- 4:32 AM – 7:00 PM
- Cloud cover
- 80%
- 12th clearest
- Wind
- 5 km/h
- 10th windiest
- Solar energy
- 4.84 kWh/m²
- Travel score
- 4.3
- out of 10
Temperature in June
Highs climb over the month, from about 20°C in the first days to 23°C by the end.
A typical June day in Karuizawa reaches about 21°C in the afternoon and slips back to 15°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 26°C. Set against its neighbours, June runs about 3°C warmer than May and about 4°C cooler than July.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg low (°C) | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 20 | 12 |
| 2 | 20 | 12 |
| 3 | 20 | 13 |
| 4 | 20 | 13 |
| 5 | 20 | 13 |
| 6 | 20 | 13 |
| 7 | 20 | 13 |
| 8 | 21 | 13 |
| 9 | 21 | 14 |
| 10 | 21 | 14 |
| 11 | 21 | 14 |
| 12 | 21 | 14 |
| 13 | 21 | 14 |
| 14 | 21 | 14 |
| 15 | 21 | 15 |
| 16 | 21 | 15 |
| 17 | 21 | 15 |
| 18 | 21 | 15 |
| 19 | 22 | 15 |
| 20 | 22 | 15 |
| 21 | 22 | 15 |
| 22 | 22 | 16 |
| 23 | 22 | 16 |
| 24 | 22 | 16 |
| 25 | 23 | 16 |
| 26 | 23 | 16 |
| 27 | 23 | 16 |
| 28 | 23 | 17 |
| 29 | 23 | 17 |
| 30 | 23 | 17 |
How June really feels in Karuizawa
Once humidity and wind are folded in, June averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
June sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Karuizawa weather by month
How June compares with the rest of the year at a glance. June is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 3° / -4° | 59 | 7.4 | 6.5 | 9.8 | 0.0 |
| Feb | 4° / -4° | 60 | 8.6 | 6.7 | 10.6 | 0.0 |
| Mar | 8° / -1° | 110 | 13.1 | 7.1 | 11.7 | 1.3 |
| Apr | 14° / 5° | 122 | 13.8 | 2.1 | 12.9 | 3.7 |
| May | 19° / 10° | 165 | 16.8 | 0.1 | 13.9 | 5.1 |
| Jun | 21° / 15° | 254 | 22.7 | 0 | 14.4 | 4.3 |
| Jul | 25° / 19° | 282 | 24 | 0 | 14.2 | 4.5 |
| Aug | 26° / 19° | 240 | 24.1 | 0 | 13.4 | 4.5 |
| Sep | 22° / 16° | 241 | 20.6 | 0 | 12.2 | 4.8 |
| Oct | 17° / 9° | 195 | 15.5 | 0 | 11.1 | 4.7 |
| Nov | 11° / 3° | 72 | 8.8 | 0.6 | 10.1 | 3.1 |
| Dec | 6° / -1° | 49 | 7.6 | 4.4 | 9.6 | 0.6 |
Cloud cover in June
The sky is clear or mostly clear about 9% of the time in June, the cloudiest month of the year.
Beyond those clear spells, partly cloudy skies cover about 9% of June, with mostly cloudy or overcast conditions the remaining 81%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 29 | 28 | 27 | 26 | 25 | 25 | 25 | 22 | 22 | 21 | 20 | 20 | 18 | 18 | 17 | 17 | 16 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
| Cloudier (%) | 71 | 72 | 73 | 74 | 75 | 75 | 75 | 78 | 78 | 79 | 80 | 80 | 82 | 82 | 83 | 83 | 84 | 86 | 86 | 86 | 86 | 86 | 86 | 86 | 86 | 86 | 86 | 86 | 86 | 86 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 29 | 71 |
| 2 | 28 | 72 |
| 3 | 27 | 73 |
| 4 | 26 | 74 |
| 5 | 25 | 75 |
| 6 | 25 | 75 |
| 7 | 25 | 75 |
| 8 | 22 | 78 |
| 9 | 22 | 78 |
| 10 | 21 | 79 |
| 11 | 20 | 80 |
| 12 | 20 | 80 |
| 13 | 18 | 82 |
| 14 | 18 | 82 |
| 15 | 17 | 83 |
| 16 | 17 | 83 |
| 17 | 16 | 84 |
| 18 | 14 | 86 |
| 19 | 14 | 86 |
| 20 | 14 | 86 |
| 21 | 14 | 86 |
| 22 | 14 | 86 |
| 23 | 14 | 86 |
| 24 | 14 | 86 |
| 25 | 14 | 86 |
| 26 | 14 | 86 |
| 27 | 14 | 86 |
| 28 | 14 | 86 |
| 29 | 14 | 86 |
| 30 | 14 | 86 |
Chance of precipitation in June
Karuizawa gets around 254 mm of rain over 22.7 wet days in June. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 76% and peaks near 81% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 63 | 65 | 66 | 67 | 68 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 79 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 81 | 81 | 81 | 81 |
| Rain chance (%) | |
|---|---|
| 1 | 63 |
| 2 | 65 |
| 3 | 66 |
| 4 | 67 |
| 5 | 68 |
| 6 | 70 |
| 7 | 71 |
| 8 | 72 |
| 9 | 73 |
| 10 | 74 |
| 11 | 75 |
| 12 | 76 |
| 13 | 77 |
| 14 | 78 |
| 15 | 79 |
| 16 | 79 |
| 17 | 80 |
| 18 | 80 |
| 19 | 80 |
| 20 | 80 |
| 21 | 80 |
| 22 | 80 |
| 23 | 80 |
| 24 | 80 |
| 25 | 80 |
| 26 | 80 |
| 27 | 81 |
| 28 | 81 |
| 29 | 81 |
| 30 | 81 |
Humidity in June
Most of June feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, June lands in the comfortable band about 37% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 75 | 72 | 69 | 66 | 63 | 60 | 56 | 53 | 50 | 47 | 43 | 40 | 37 | 34 | 31 | 29 | 26 | 24 | 22 | 20 | 19 | 17 | 15 | 14 | 12 | 11 | 10 | 9 | 8 | 7 |
| Comfortable (%) | 23 | 25 | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 43 | 44 | 45 | 46 | 46 | 46 | 46 | 45 | 44 | 43 | 42 | 40 | 38 | 37 | 35 | 33 | 31 | 29 | 27 | 25 |
| Humid (%) | 2 | 3 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 11 | 13 | 15 | 17 | 19 | 21 | 24 | 26 | 28 | 30 | 33 | 35 | 37 | 40 | 42 | 44 | 46 | 47 | 49 | 50 | 51 |
| Muggy (%) | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 11 | 12 | 14 | 15 | 17 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 75 | 23 | 2 | 0 |
| 2 | 72 | 25 | 3 | 0 |
| 3 | 69 | 28 | 3 | 0 |
| 4 | 66 | 30 | 4 | 0 |
| 5 | 63 | 32 | 5 | 0 |
| 6 | 60 | 34 | 6 | 0 |
| 7 | 56 | 36 | 7 | 1 |
| 8 | 53 | 38 | 8 | 1 |
| 9 | 50 | 40 | 9 | 1 |
| 10 | 47 | 42 | 11 | 1 |
| 11 | 43 | 43 | 13 | 1 |
| 12 | 40 | 44 | 15 | 1 |
| 13 | 37 | 45 | 17 | 1 |
| 14 | 34 | 46 | 19 | 1 |
| 15 | 31 | 46 | 21 | 1 |
| 16 | 29 | 46 | 24 | 2 |
| 17 | 26 | 46 | 26 | 2 |
| 18 | 24 | 45 | 28 | 2 |
| 19 | 22 | 44 | 30 | 3 |
| 20 | 20 | 43 | 33 | 4 |
| 21 | 19 | 42 | 35 | 5 |
| 22 | 17 | 40 | 37 | 6 |
| 23 | 15 | 38 | 40 | 7 |
| 24 | 14 | 37 | 42 | 8 |
| 25 | 12 | 35 | 44 | 9 |
| 26 | 11 | 33 | 46 | 11 |
| 27 | 10 | 31 | 47 | 12 |
| 28 | 9 | 29 | 49 | 14 |
| 29 | 8 | 27 | 50 | 15 |
| 30 | 7 | 25 | 51 | 17 |
Wind in June
Winds average 5 km/h in June.
Across June, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 5 | calm |
| 9 | 5 | calm |
| 10 | 5 | calm |
| 11 | 5 | calm |
| 12 | 5 | calm |
| 13 | 5 | calm |
| 14 | 5 | calm |
| 15 | 5 | calm |
| 16 | 5 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
Sunrise & sunset in June
Daylight runs from about 14 h 18 min at the start of June to 14 h 30 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 12 minutes over June. Sunrise moves from 4:34 AM to 4:35 AM, and sunset from 6:52 PM to 7:02 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 14.3 | 14.3 | 14.3 | 14.3 | 14.4 | 14.4 | 14.4 | 14.4 | 14.4 | 14.4 | 14.4 | 14.4 | 14.4 | 14.5 | 14.5 | 14.5 | 14.5 | 14.5 | 14.5 | 14.5 | 14.5 | 14.5 | 14.5 | 14.5 | 14.5 | 14.5 | 14.5 | 14.5 | 14.5 | 14.5 |
| Sunrise (AM) | 4:34 | 4:34 | 4:34 | 4:33 | 4:33 | 4:33 | 4:33 | 4:32 | 4:32 | 4:32 | 4:32 | 4:32 | 4:32 | 4:32 | 4:32 | 4:32 | 4:32 | 4:32 | 4:32 | 4:32 | 4:32 | 4:33 | 4:33 | 4:33 | 4:33 | 4:34 | 4:34 | 4:34 | 4:35 | 4:35 |
| Sunset (PM) | 6:52 | 6:52 | 6:53 | 6:54 | 6:54 | 6:55 | 6:55 | 6:56 | 6:56 | 6:57 | 6:57 | 6:58 | 6:58 | 6:59 | 6:59 | 7:00 | 7:00 | 7:00 | 7:01 | 7:01 | 7:01 | 7:01 | 7:02 | 7:02 | 7:02 | 7:02 | 7:02 | 7:02 | 7:02 | 7:02 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.3 | 4:34 | 6:52 |
| 2 | 14.3 | 4:34 | 6:52 |
| 3 | 14.3 | 4:34 | 6:53 |
| 4 | 14.3 | 4:33 | 6:54 |
| 5 | 14.4 | 4:33 | 6:54 |
| 6 | 14.4 | 4:33 | 6:55 |
| 7 | 14.4 | 4:33 | 6:55 |
| 8 | 14.4 | 4:32 | 6:56 |
| 9 | 14.4 | 4:32 | 6:56 |
| 10 | 14.4 | 4:32 | 6:57 |
| 11 | 14.4 | 4:32 | 6:57 |
| 12 | 14.4 | 4:32 | 6:58 |
| 13 | 14.4 | 4:32 | 6:58 |
| 14 | 14.5 | 4:32 | 6:59 |
| 15 | 14.5 | 4:32 | 6:59 |
| 16 | 14.5 | 4:32 | 7:00 |
| 17 | 14.5 | 4:32 | 7:00 |
| 18 | 14.5 | 4:32 | 7:00 |
| 19 | 14.5 | 4:32 | 7:01 |
| 20 | 14.5 | 4:32 | 7:01 |
| 21 | 14.5 | 4:32 | 7:01 |
| 22 | 14.5 | 4:33 | 7:01 |
| 23 | 14.5 | 4:33 | 7:02 |
| 24 | 14.5 | 4:33 | 7:02 |
| 25 | 14.5 | 4:33 | 7:02 |
| 26 | 14.5 | 4:34 | 7:02 |
| 27 | 14.5 | 4:34 | 7:02 |
| 28 | 14.5 | 4:34 | 7:02 |
| 29 | 14.5 | 4:35 | 7:02 |
| 30 | 14.5 | 4:35 | 7:02 |
Solar energy in June
Average shortwave solar energy reaching the ground each day in June, about 4.84 kWh/m².
For context, solar energy here swings from a low near 2.51 kWh/m² to a high of 5.52 kWh/m² in May across the year — June's 4.84 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.4 | 5.4 | 5.3 | 5.3 | 5.3 | 5.2 | 5.2 | 5.1 | 5.0 | 5.0 | 5.0 | 4.9 | 4.9 | 4.8 | 4.8 | 4.7 | 4.7 | 4.7 | 4.6 | 4.6 | 4.6 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.4 | Bright |
| 2 | 5.4 | Bright |
| 3 | 5.3 | Bright |
| 4 | 5.3 | Bright |
| 5 | 5.3 | Bright |
| 6 | 5.2 | Bright |
| 7 | 5.2 | Bright |
| 8 | 5.1 | Bright |
| 9 | 5.0 | Bright |
| 10 | 5.0 | Bright |
| 11 | 5.0 | Bright |
| 12 | 4.9 | Bright |
| 13 | 4.9 | Bright |
| 14 | 4.8 | Bright |
| 15 | 4.8 | Bright |
| 16 | 4.7 | Bright |
| 17 | 4.7 | Bright |
| 18 | 4.7 | Bright |
| 19 | 4.6 | Bright |
| 20 | 4.6 | Bright |
| 21 | 4.6 | Bright |
| 22 | 4.5 | Bright |
| 23 | 4.5 | Bright |
| 24 | 4.5 | Bright |
| 25 | 4.5 | Bright |
| 26 | 4.5 | Bright |
| 27 | 4.5 | Bright |
| 28 | 4.5 | Bright |
| 29 | 4.5 | Bright |
| 30 | 4.5 | Bright |
Hazard calendar for Karuizawa
In June, Karuizawa sits inside its rainy season season. The full year is below, with each hazard's peak months called out.
Karuizawa's rainy season runs May–October, when most of the year's rain falls.
Is June a good time to visit Karuizawa?
Our two travel scores rate June for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
June is a reasonable time to visit Karuizawa for sightseeing.
What to pack for Karuizawa in June
From June's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In June, Karuizawa sees daytime highs around 21°C and nights near 15°C. Pack rain gear. Worth having: sun protection. About 23 days see rain.
UV index in Karuizawa in June
Clear-sky midday UV in June peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Karuizawa peaks around July 18 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 4 | 6 | 7 | 8 | 9 | 10 | 9 | 9 | 6 | 3 | 2 |
| Level | Moderate | Moderate | High | High | Very high | Very high | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 4 | Moderate |
| Mar | 6 | High |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 9 | Very high |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Karuizawa in June
Average fine-particle pollution (PM2.5) through the year — so you can see where June falls, not just the annual average.
Air quality in Karuizawa is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 10 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 11 | 14 | 19 | 21 | 20 | 18 | 15 | 14 | 13 | 12 | 11 | 10 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 14 | Moderate |
| Mar | 19 | Moderate |
| Apr | 21 | Moderate |
| May | 20 | Moderate |
| Jun | 18 | Moderate |
| Jul | 15 | Moderate |
| Aug | 14 | Moderate |
| Sep | 13 | Moderate |
| Oct | 12 | Moderate |
| Nov | 11 | Good |
| Dec | 10 | Good |
Where is Karuizawa?
Karuizawa sits at 36.4°N, 138.6°E, 952 m above sea level, in Japan. The nearest listed city is Miyota, 11 km away.
Topography around Karuizawa
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Karuizawa.
Within 3 km, the terrain around Karuizawa has large variations in elevation — a maximum elevation change of 632 m around an average of 1,004 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,316 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,985 m.
The land around Karuizawa is covered by trees (86%) within 3 km, trees (86%) within 16 km, and trees (80%) within 80 km.
Japan travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 100 V · 50 / 60 Hz
- Prices
- ≈ 65% of US
- price level, 2025
- GDP per capita
- $35,951
- 2025
- Happiness
- 6.1 / 10
- World Happiness, 2025
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 0.2
- per 100k, 2023
- Road deaths
- 3.6
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very low
- EF EPI 446
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Karuizawa (36.35°, 138.6333°, elevation 952 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).