Itako weather in October
In October, Itako sees average daytime highs of 21°C and overnight lows near 17°C, with 213 mm of rain across 13 wet days and about 11.1 hours of daylight. It is the 5th-warmest and 1st-wettest month of the year here.
Highs ease over the month, from about 23°C in the first days to 19°C by the end. The sky is clear or mostly clear about 32% of the time in October, and the air most often feels dry.
Daylight stretches from about 11 h 36 min at the start of October to 10 h 30 min by month's end. Set against the rest of the year, October is Itako's 6th-clearest and 5th-windiest month. For the whole year in context, see Itako's year-round climate.
- Daytime high
- 21°
- 5th warmest
- Overnight low
- 17°
- 8th coldest
- Rainfall
- 213 mm
- 13 wet days
- Daylight
- 11 h 06 min
- 5:51 AM – 4:55 PM
- Cloud cover
- 61%
- 6th clearest
- Wind
- 15 km/h
- 5th windiest
- Solar energy
- 3.06 kWh/m²
- Travel score
- 6.0
- out of 10
Itako is city in Ibaraki Prefecture, Japan.
- Density
- 387/km²
- people per km²
- Founded
- 2001
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in October
Highs ease over the month, from about 23°C in the first days to 19°C by the end.
A typical October day in Itako reaches about 21°C in the afternoon and slips back to 17°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 24°C. Set against its neighbours, October runs about 5°C cooler than September and about 5°C warmer than November.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 |
| Avg low (°C) | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 23 | 19 |
| 2 | 23 | 19 |
| 3 | 23 | 19 |
| 4 | 22 | 19 |
| 5 | 22 | 19 |
| 6 | 22 | 18 |
| 7 | 22 | 18 |
| 8 | 22 | 18 |
| 9 | 22 | 18 |
| 10 | 22 | 18 |
| 11 | 21 | 18 |
| 12 | 21 | 17 |
| 13 | 21 | 17 |
| 14 | 21 | 17 |
| 15 | 21 | 17 |
| 16 | 21 | 17 |
| 17 | 20 | 17 |
| 18 | 20 | 16 |
| 19 | 20 | 16 |
| 20 | 20 | 16 |
| 21 | 20 | 16 |
| 22 | 20 | 16 |
| 23 | 20 | 15 |
| 24 | 19 | 15 |
| 25 | 19 | 15 |
| 26 | 19 | 15 |
| 27 | 19 | 15 |
| 28 | 19 | 15 |
| 29 | 19 | 14 |
| 30 | 19 | 14 |
| 31 | 19 | 14 |
How October really feels in Itako
Once humidity and wind are folded in, October 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.
October sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Itako weather by month
How October compares with the rest of the year at a glance. October is the 5th-warmest and 1st-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 9° / 4° | 77 | 8 | 0.6 | 9.8 | 2.0 |
| Feb | 9° / 4° | 74 | 8.5 | 0.8 | 10.6 | 2.1 |
| Mar | 12° / 7° | 128 | 12.6 | 0.4 | 11.7 | 3.1 |
| Apr | 16° / 11° | 118 | 12.5 | 0 | 12.9 | 4.9 |
| May | 20° / 15° | 136 | 12 | 0 | 13.9 | 5.9 |
| Jun | 23° / 19° | 157 | 13.6 | 0 | 14.4 | 5.8 |
| Jul | 27° / 22° | 149 | 13.6 | 0 | 14.2 | 5.8 |
| Aug | 28° / 24° | 103 | 10.7 | 0 | 13.4 | 5.7 |
| Sep | 25° / 22° | 171 | 13.8 | 0 | 12.2 | 6.0 |
| Oct | 21° / 17° | 213 | 13 | 0 | 11.1 | 6.0 |
| Nov | 16° / 11° | 107 | 10.7 | 0 | 10.1 | 5.0 |
| Dec | 11° / 6° | 73 | 9.2 | 0 | 9.6 | 3.1 |
Cloud cover in October
The sky is clear or mostly clear about 32% of the time in October.
Beyond those clear spells, partly cloudy skies cover about 15% of October, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to open up 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 38 | 39 | 38 | 39 | 40 | 40 | 42 | 42 | 43 | 42 | 43 | 43 | 43 | 44 | 45 | 46 | 46 | 47 | 47 | 49 | 50 | 50 | 51 | 52 | 53 | 53 | 54 | 55 | 55 | 55 | 56 |
| Cloudier (%) | 62 | 61 | 62 | 61 | 60 | 60 | 58 | 58 | 57 | 58 | 57 | 57 | 57 | 56 | 55 | 54 | 54 | 53 | 53 | 51 | 50 | 50 | 49 | 48 | 47 | 47 | 46 | 45 | 45 | 45 | 44 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 38 | 62 |
| 2 | 39 | 61 |
| 3 | 38 | 62 |
| 4 | 39 | 61 |
| 5 | 40 | 60 |
| 6 | 40 | 60 |
| 7 | 42 | 58 |
| 8 | 42 | 58 |
| 9 | 43 | 57 |
| 10 | 42 | 58 |
| 11 | 43 | 57 |
| 12 | 43 | 57 |
| 13 | 43 | 57 |
| 14 | 44 | 56 |
| 15 | 45 | 55 |
| 16 | 46 | 54 |
| 17 | 46 | 54 |
| 18 | 47 | 53 |
| 19 | 47 | 53 |
| 20 | 49 | 51 |
| 21 | 50 | 50 |
| 22 | 50 | 50 |
| 23 | 51 | 49 |
| 24 | 52 | 48 |
| 25 | 53 | 47 |
| 26 | 53 | 47 |
| 27 | 54 | 46 |
| 28 | 55 | 45 |
| 29 | 55 | 45 |
| 30 | 55 | 45 |
| 31 | 56 | 44 |
Chance of precipitation in October
Itako gets around 213 mm of rain over 13 wet days in October, the wettest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 42% and peaks near 45% on the wettest days. The odds ease 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 45 | 45 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 43 | 43 | 43 | 42 | 42 | 42 | 41 | 41 | 41 | 41 | 40 | 40 | 40 | 39 | 39 | 38 | 38 | 38 | 37 | 37 |
| Rain chance (%) | |
|---|---|
| 1 | 45 |
| 2 | 45 |
| 3 | 44 |
| 4 | 44 |
| 5 | 44 |
| 6 | 44 |
| 7 | 44 |
| 8 | 44 |
| 9 | 44 |
| 10 | 44 |
| 11 | 44 |
| 12 | 43 |
| 13 | 43 |
| 14 | 43 |
| 15 | 42 |
| 16 | 42 |
| 17 | 42 |
| 18 | 41 |
| 19 | 41 |
| 20 | 41 |
| 21 | 41 |
| 22 | 40 |
| 23 | 40 |
| 24 | 40 |
| 25 | 39 |
| 26 | 39 |
| 27 | 38 |
| 28 | 38 |
| 29 | 38 |
| 30 | 37 |
| 31 | 37 |
Humidity in October
Most of October feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, October lands in the dry band about 40% of days. Sticky, muggy-or-worse air turns up on roughly 12% of them.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 15 | 16 | 17 | 18 | 20 | 21 | 22 | 24 | 26 | 28 | 29 | 31 | 33 | 35 | 37 | 39 | 41 | 43 | 45 | 48 | 50 | 51 | 53 | 55 | 57 | 59 | 60 | 62 | 63 | 65 | 66 |
| Comfortable (%) | 18 | 19 | 20 | 20 | 21 | 22 | 22 | 23 | 24 | 25 | 27 | 28 | 29 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 29 | 28 | 27 | 27 | 26 | 25 | 24 | 24 |
| Humid (%) | 35 | 35 | 35 | 35 | 35 | 34 | 33 | 32 | 31 | 29 | 28 | 26 | 25 | 23 | 22 | 20 | 19 | 18 | 17 | 16 | 15 | 15 | 14 | 13 | 13 | 12 | 12 | 11 | 11 | 10 | 9 |
| Muggy (%) | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 3 | 2 | 2 | 1 | 1 | 1 | 1 | 1 |
| Oppressive (%) | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 15 | 18 | 35 | 26 | 5 |
| 2 | 16 | 19 | 35 | 25 | 4 |
| 3 | 17 | 20 | 35 | 24 | 4 |
| 4 | 18 | 20 | 35 | 23 | 3 |
| 5 | 20 | 21 | 35 | 22 | 3 |
| 6 | 21 | 22 | 34 | 21 | 2 |
| 7 | 22 | 22 | 33 | 20 | 2 |
| 8 | 24 | 23 | 32 | 19 | 2 |
| 9 | 26 | 24 | 31 | 18 | 1 |
| 10 | 28 | 25 | 29 | 16 | 1 |
| 11 | 29 | 27 | 28 | 15 | 1 |
| 12 | 31 | 28 | 26 | 14 | 1 |
| 13 | 33 | 29 | 25 | 13 | 1 |
| 14 | 35 | 30 | 23 | 12 | 0 |
| 15 | 37 | 30 | 22 | 11 | 0 |
| 16 | 39 | 31 | 20 | 10 | 0 |
| 17 | 41 | 31 | 19 | 9 | 0 |
| 18 | 43 | 31 | 18 | 8 | 0 |
| 19 | 45 | 31 | 17 | 7 | 0 |
| 20 | 48 | 31 | 16 | 6 | 0 |
| 21 | 50 | 30 | 15 | 5 | 0 |
| 22 | 51 | 30 | 15 | 4 | 0 |
| 23 | 53 | 30 | 14 | 3 | 0 |
| 24 | 55 | 29 | 13 | 3 | 0 |
| 25 | 57 | 28 | 13 | 2 | 0 |
| 26 | 59 | 27 | 12 | 2 | 0 |
| 27 | 60 | 27 | 12 | 1 | 0 |
| 28 | 62 | 26 | 11 | 1 | 0 |
| 29 | 63 | 25 | 11 | 1 | 0 |
| 30 | 65 | 24 | 10 | 1 | 0 |
| 31 | 66 | 24 | 9 | 1 | 0 |
Wind in October
Winds average 15 km/h in October.
Across October, daily wind ranges from about 13 km/h on the calmest days to 15 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 15 | light breeze |
| 2 | 15 | light breeze |
| 3 | 15 | light breeze |
| 4 | 15 | light breeze |
| 5 | 15 | light breeze |
| 6 | 15 | light breeze |
| 7 | 15 | light breeze |
| 8 | 15 | light breeze |
| 9 | 15 | light breeze |
| 10 | 15 | light breeze |
| 11 | 15 | light breeze |
| 12 | 15 | light breeze |
| 13 | 15 | light breeze |
| 14 | 15 | light breeze |
| 15 | 15 | light breeze |
| 16 | 15 | light breeze |
| 17 | 15 | light breeze |
| 18 | 15 | light breeze |
| 19 | 15 | light breeze |
| 20 | 15 | light breeze |
| 21 | 14 | light breeze |
| 22 | 14 | light breeze |
| 23 | 14 | light breeze |
| 24 | 14 | light breeze |
| 25 | 14 | light breeze |
| 26 | 14 | light breeze |
| 27 | 14 | light breeze |
| 28 | 14 | light breeze |
| 29 | 14 | light breeze |
| 30 | 13 | light breeze |
| 31 | 13 | light breeze |
Sunrise & sunset in October
Daylight runs from about 11 h 36 min at the start of October to 10 h 30 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 66 minutes over October. Sunrise moves from 5:38 AM to 6:05 AM, and sunset from 5:16 PM to 4:38 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.6 | 11.6 | 11.6 | 11.5 | 11.5 | 11.4 | 11.4 | 11.4 | 11.3 | 11.3 | 11.3 | 11.2 | 11.2 | 11.1 | 11.1 | 11.1 | 11.0 | 11.0 | 11.0 | 10.9 | 10.9 | 10.9 | 10.8 | 10.8 | 10.7 | 10.7 | 10.7 | 10.6 | 10.6 | 10.6 | 10.5 |
| Sunrise (AM) | 5:38 | 5:38 | 5:39 | 5:40 | 5:41 | 5:42 | 5:43 | 5:44 | 5:44 | 5:45 | 5:46 | 5:47 | 5:48 | 5:49 | 5:50 | 5:51 | 5:52 | 5:53 | 5:53 | 5:54 | 5:55 | 5:56 | 5:57 | 5:58 | 5:59 | 6:00 | 6:01 | 6:02 | 6:03 | 6:04 | 6:05 |
| Sunset (PM) | 5:16 | 5:15 | 5:13 | 5:12 | 5:10 | 5:09 | 5:07 | 5:06 | 5:04 | 5:03 | 5:02 | 5:00 | 4:59 | 4:58 | 4:56 | 4:55 | 4:54 | 4:52 | 4:51 | 4:50 | 4:49 | 4:47 | 4:46 | 4:45 | 4:44 | 4:43 | 4:42 | 4:41 | 4:40 | 4:39 | 4:38 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.6 | 5:38 | 5:16 |
| 2 | 11.6 | 5:38 | 5:15 |
| 3 | 11.6 | 5:39 | 5:13 |
| 4 | 11.5 | 5:40 | 5:12 |
| 5 | 11.5 | 5:41 | 5:10 |
| 6 | 11.4 | 5:42 | 5:09 |
| 7 | 11.4 | 5:43 | 5:07 |
| 8 | 11.4 | 5:44 | 5:06 |
| 9 | 11.3 | 5:44 | 5:04 |
| 10 | 11.3 | 5:45 | 5:03 |
| 11 | 11.3 | 5:46 | 5:02 |
| 12 | 11.2 | 5:47 | 5:00 |
| 13 | 11.2 | 5:48 | 4:59 |
| 14 | 11.1 | 5:49 | 4:58 |
| 15 | 11.1 | 5:50 | 4:56 |
| 16 | 11.1 | 5:51 | 4:55 |
| 17 | 11.0 | 5:52 | 4:54 |
| 18 | 11.0 | 5:53 | 4:52 |
| 19 | 11.0 | 5:53 | 4:51 |
| 20 | 10.9 | 5:54 | 4:50 |
| 21 | 10.9 | 5:55 | 4:49 |
| 22 | 10.9 | 5:56 | 4:47 |
| 23 | 10.8 | 5:57 | 4:46 |
| 24 | 10.8 | 5:58 | 4:45 |
| 25 | 10.7 | 5:59 | 4:44 |
| 26 | 10.7 | 6:00 | 4:43 |
| 27 | 10.7 | 6:01 | 4:42 |
| 28 | 10.6 | 6:02 | 4:41 |
| 29 | 10.6 | 6:03 | 4:40 |
| 30 | 10.6 | 6:04 | 4:39 |
| 31 | 10.5 | 6:05 | 4:38 |
Solar energy in October
Average shortwave solar energy reaching the ground each day in October, about 3.06 kWh/m².
For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.41 kWh/m² in May across the year — October's 3.06 kWh/m² falls in the middle.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 3.4 | 3.4 | 3.3 | 3.3 | 3.3 | 3.3 | 3.2 | 3.2 | 3.2 | 3.1 | 3.1 | 3.1 | 3.1 | 3.1 | 3.1 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 3.4 | Moderate |
| 2 | 3.4 | Moderate |
| 3 | 3.3 | Moderate |
| 4 | 3.3 | Moderate |
| 5 | 3.3 | Moderate |
| 6 | 3.3 | Moderate |
| 7 | 3.2 | Moderate |
| 8 | 3.2 | Moderate |
| 9 | 3.2 | Moderate |
| 10 | 3.1 | Moderate |
| 11 | 3.1 | Moderate |
| 12 | 3.1 | Moderate |
| 13 | 3.1 | Moderate |
| 14 | 3.1 | Moderate |
| 15 | 3.1 | Moderate |
| 16 | 3.0 | Moderate |
| 17 | 3.0 | Moderate |
| 18 | 3.0 | Moderate |
| 19 | 3.0 | Moderate |
| 20 | 3.0 | Moderate |
| 21 | 3.0 | Moderate |
| 22 | 3.0 | Moderate |
| 23 | 3.0 | Moderate |
| 24 | 3.0 | Moderate |
| 25 | 3.0 | Moderate |
| 26 | 2.9 | Moderate |
| 27 | 2.9 | Moderate |
| 28 | 2.9 | Moderate |
| 29 | 2.9 | Moderate |
| 30 | 2.9 | Moderate |
| 31 | 2.9 | Moderate |
Hazard calendar for Itako
In October, Itako sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Itako sits in the Pacific typhoon belt; the season peaks July–October.
Is October a good time to visit Itako?
Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
October is a reasonable time to visit Itako for sightseeing.
What to pack for Itako in October
From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In October, Itako sees daytime highs around 21°C and nights near 17°C. Worth packing: rain gear. About 13 days see rain.
Sea temperature near Itako in October
The nearest coast averages about 21°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 22 km away) is warmest in August at about 24°C and coldest in February near 13°C.
It's comfortable for a long swim from Jun 23 to Oct 28 — about 4.2 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 15 | 13 | 13 | 15 | 17 | 20 | 22 | 24 | 23 | 21 | 19 | 16 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Warm | Refreshing | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 15 | Bracing |
| Feb | 13 | Bracing |
| Mar | 13 | Bracing |
| Apr | 15 | Bracing |
| May | 17 | Cool |
| Jun | 20 | Cool |
| Jul | 22 | Refreshing |
| Aug | 24 | Warm |
| Sep | 23 | Refreshing |
| Oct | 21 | Refreshing |
| Nov | 19 | Cool |
| Dec | 16 | Cool |
UV index in Itako in October
Clear-sky midday UV in October peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Itako peaks around August 12 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 | 4 | 6 | 8 | 9 | 10 | 10 | 8 | 6 | 3 | 2 |
| Level | Moderate | Moderate | Moderate | 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 | 4 | Moderate |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 10 | Very high |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Itako in October
Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.
Air quality in Itako is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 14 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) | 15 | 18 | 25 | 25 | 24 | 19 | 16 | 15 | 15 | 16 | 16 | 14 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 15 | Moderate |
| Feb | 18 | Moderate |
| Mar | 25 | Moderate |
| Apr | 25 | Moderate |
| May | 24 | Moderate |
| Jun | 19 | Moderate |
| Jul | 16 | Moderate |
| Aug | 15 | Moderate |
| Sep | 15 | Moderate |
| Oct | 16 | Moderate |
| Nov | 16 | Moderate |
| Dec | 14 | Moderate |
Where is Itako?
Itako sits at 35.9°N, 140.6°E, 0 m above sea level, in Japan. The nearest listed city is Katori-shi, 6.0 km away.
Topography around Itako
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Itako.
Within 3 km, the terrain around Itako has only modest variations in elevation — a maximum elevation change of 43 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 70 m; within 80 km, large variations in elevation — a maximum elevation change of 840 m.
The land around Itako is covered by cropland (54%) and artificial surfaces (21%) within 3 km, cropland (31%), trees (25%) and water (21%) within 16 km, and water (37%) and trees (25%) 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 Itako (35.9333°, 140.55°, elevation 0 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).