Yokosuka weather in July
In July, Yokosuka sees average daytime highs of 25°C and overnight lows near 23°C, with 147 mm of rain across 11.5 wet days and about 14.1 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.
Highs climb over the month, from about 24°C in the first days to 26°C by the end. The sky is clear or mostly clear about 22% of the time in July, and the air most often feels oppressive.
Daylight stretches from about 14 h 24 min at the start of July to 13 h 48 min by month's end. Set against the rest of the year, July is Yokosuka's 11th-clearest and 10th-windiest month. For the whole year in context, see Yokosuka's year-round climate.
- Daytime high
- 25°
- 2nd warmest
- Overnight low
- 23°
- 11th coldest
- Rainfall
- 147 mm
- 11.5 wet days
- Daylight
- 14 h 12 min
- 4:42 AM – 6:52 PM
- Cloud cover
- 70%
- 11th clearest
- Wind
- 17 km/h
- 10th windiest
- Solar energy
- 5.02 kWh/m²
- Travel score
- 6.4
- out of 10
Yokosuka is city in Kanagawa Prefecture, Japan.
- Density
- 4,061/km²
- people per km²
- Founded
- 1907
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in July
Highs climb over the month, from about 24°C in the first days to 26°C by the end.
A typical July day in Yokosuka reaches about 25°C in the afternoon and slips back to 23°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 27°C. Set against its neighbours, July runs about 3°C warmer than June and about 2°C cooler than August.
| 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) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 27 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 24 | 22 |
| 2 | 24 | 22 |
| 3 | 24 | 22 |
| 4 | 24 | 22 |
| 5 | 24 | 22 |
| 6 | 24 | 22 |
| 7 | 24 | 22 |
| 8 | 25 | 23 |
| 9 | 25 | 23 |
| 10 | 25 | 23 |
| 11 | 25 | 23 |
| 12 | 25 | 23 |
| 13 | 25 | 23 |
| 14 | 25 | 23 |
| 15 | 25 | 23 |
| 16 | 25 | 23 |
| 17 | 25 | 23 |
| 18 | 26 | 23 |
| 19 | 26 | 24 |
| 20 | 26 | 24 |
| 21 | 26 | 24 |
| 22 | 26 | 24 |
| 23 | 26 | 24 |
| 24 | 26 | 24 |
| 25 | 26 | 24 |
| 26 | 26 | 24 |
| 27 | 26 | 24 |
| 28 | 26 | 24 |
| 29 | 27 | 24 |
| 30 | 27 | 25 |
| 31 | 27 | 25 |
Yokosuka weather by month
How July compares with the rest of the year at a glance. July is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 10° / 6° | 82 | 7.4 | 0.4 | 9.9 | 2.5 |
| Feb | 10° / 6° | 83 | 8.5 | 0.7 | 10.7 | 2.4 |
| Mar | 13° / 8° | 144 | 13 | 0.2 | 11.7 | 3.3 |
| Apr | 16° / 13° | 126 | 11.6 | 0 | 12.9 | 4.8 |
| May | 19° / 17° | 138 | 10.9 | 0 | 13.8 | 6.0 |
| Jun | 22° / 20° | 182 | 12.9 | 0 | 14.3 | 5.8 |
| Jul | 25° / 23° | 147 | 11.5 | 0 | 14.1 | 6.4 |
| Aug | 27° / 25° | 107 | 9.8 | 0 | 13.3 | 6.5 |
| Sep | 25° / 22° | 185 | 13.2 | 0 | 12.2 | 6.2 |
| Oct | 21° / 18° | 222 | 12.7 | 0 | 11.1 | 6.1 |
| Nov | 17° / 13° | 115 | 10.7 | 0 | 10.1 | 5.3 |
| Dec | 13° / 9° | 73 | 8.5 | 0 | 9.7 | 3.7 |
Cloud cover in July
The sky is clear or mostly clear about 22% of the time in July.
Beyond those clear spells, partly cloudy skies cover about 10% of July, with mostly cloudy or overcast conditions the remaining 68%. 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 (%) | 24 | 24 | 25 | 25 | 26 | 26 | 27 | 27 | 28 | 28 | 28 | 29 | 29 | 30 | 30 | 31 | 31 | 31 | 32 | 33 | 34 | 34 | 36 | 36 | 38 | 39 | 41 | 41 | 42 | 43 | 45 |
| Cloudier (%) | 76 | 76 | 75 | 75 | 74 | 74 | 73 | 73 | 72 | 72 | 72 | 71 | 71 | 70 | 70 | 69 | 69 | 69 | 68 | 67 | 66 | 66 | 64 | 64 | 62 | 61 | 59 | 59 | 58 | 57 | 55 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 24 | 76 |
| 2 | 24 | 76 |
| 3 | 25 | 75 |
| 4 | 25 | 75 |
| 5 | 26 | 74 |
| 6 | 26 | 74 |
| 7 | 27 | 73 |
| 8 | 27 | 73 |
| 9 | 28 | 72 |
| 10 | 28 | 72 |
| 11 | 28 | 72 |
| 12 | 29 | 71 |
| 13 | 29 | 71 |
| 14 | 30 | 70 |
| 15 | 30 | 70 |
| 16 | 31 | 69 |
| 17 | 31 | 69 |
| 18 | 31 | 69 |
| 19 | 32 | 68 |
| 20 | 33 | 67 |
| 21 | 34 | 66 |
| 22 | 34 | 66 |
| 23 | 36 | 64 |
| 24 | 36 | 64 |
| 25 | 38 | 62 |
| 26 | 39 | 61 |
| 27 | 41 | 59 |
| 28 | 41 | 59 |
| 29 | 42 | 58 |
| 30 | 43 | 57 |
| 31 | 45 | 55 |
Chance of precipitation in July
Yokosuka gets around 147 mm of rain over 11.5 wet days in July. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 36% and peaks near 46% 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 (%) | 46 | 46 | 45 | 44 | 44 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 34 | 34 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 32 | 32 | 32 | 31 | 31 | 31 | 30 |
| Rain chance (%) | |
|---|---|
| 1 | 46 |
| 2 | 46 |
| 3 | 45 |
| 4 | 44 |
| 5 | 44 |
| 6 | 43 |
| 7 | 42 |
| 8 | 41 |
| 9 | 40 |
| 10 | 39 |
| 11 | 38 |
| 12 | 37 |
| 13 | 36 |
| 14 | 35 |
| 15 | 34 |
| 16 | 34 |
| 17 | 34 |
| 18 | 33 |
| 19 | 33 |
| 20 | 33 |
| 21 | 33 |
| 22 | 33 |
| 23 | 33 |
| 24 | 33 |
| 25 | 32 |
| 26 | 32 |
| 27 | 32 |
| 28 | 31 |
| 29 | 31 |
| 30 | 31 |
| 31 | 30 |
Humidity in July
Most of July feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, July lands in the oppressive band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 94% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Humid (%) | 11 | 11 | 10 | 9 | 9 | 8 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Muggy (%) | 44 | 42 | 40 | 37 | 36 | 34 | 32 | 30 | 29 | 27 | 26 | 25 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 14 | 13 | 12 | 11 | 10 | 10 | 9 | 9 | 8 |
| Oppressive (%) | 42 | 45 | 47 | 51 | 51 | 54 | 56 | 57 | 59 | 60 | 61 | 62 | 63 | 63 | 62 | 62 | 63 | 62 | 61 | 61 | 60 | 59 | 57 | 57 | 55 | 54 | 52 | 50 | 48 | 47 | 45 |
| Miserable (%) | 1 | 1 | 1 | 2 | 3 | 3 | 4 | 5 | 5 | 6 | 7 | 8 | 9 | 10 | 12 | 13 | 14 | 16 | 18 | 19 | 21 | 23 | 25 | 27 | 30 | 32 | 35 | 37 | 40 | 42 | 44 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|
| 1 | 2 | 11 | 44 | 42 | 1 |
| 2 | 2 | 11 | 42 | 45 | 1 |
| 3 | 1 | 10 | 40 | 47 | 1 |
| 4 | 1 | 9 | 37 | 51 | 2 |
| 5 | 1 | 9 | 36 | 51 | 3 |
| 6 | 1 | 8 | 34 | 54 | 3 |
| 7 | 1 | 7 | 32 | 56 | 4 |
| 8 | 1 | 7 | 30 | 57 | 5 |
| 9 | 1 | 6 | 29 | 59 | 5 |
| 10 | 1 | 6 | 27 | 60 | 6 |
| 11 | 0 | 6 | 26 | 61 | 7 |
| 12 | 0 | 5 | 25 | 62 | 8 |
| 13 | 0 | 5 | 23 | 63 | 9 |
| 14 | 0 | 5 | 22 | 63 | 10 |
| 15 | 0 | 5 | 21 | 62 | 12 |
| 16 | 0 | 5 | 20 | 62 | 13 |
| 17 | 0 | 4 | 19 | 63 | 14 |
| 18 | 0 | 4 | 18 | 62 | 16 |
| 19 | 0 | 4 | 17 | 61 | 18 |
| 20 | 0 | 4 | 16 | 61 | 19 |
| 21 | 0 | 4 | 15 | 60 | 21 |
| 22 | 0 | 4 | 14 | 59 | 23 |
| 23 | 0 | 4 | 14 | 57 | 25 |
| 24 | 0 | 3 | 13 | 57 | 27 |
| 25 | 0 | 3 | 12 | 55 | 30 |
| 26 | 0 | 3 | 11 | 54 | 32 |
| 27 | 0 | 3 | 10 | 52 | 35 |
| 28 | 0 | 3 | 10 | 50 | 37 |
| 29 | 0 | 3 | 9 | 48 | 40 |
| 30 | 0 | 3 | 9 | 47 | 42 |
| 31 | 0 | 3 | 8 | 45 | 44 |
Wind in July
Winds average 17 km/h in July.
Across July, daily wind ranges from about 16 km/h on the calmest days to 18 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) | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 |
| 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 | 17 | light breeze |
| 2 | 17 | light breeze |
| 3 | 17 | light breeze |
| 4 | 17 | light breeze |
| 5 | 18 | light breeze |
| 6 | 18 | light breeze |
| 7 | 18 | light breeze |
| 8 | 18 | light breeze |
| 9 | 18 | light breeze |
| 10 | 18 | light breeze |
| 11 | 18 | light breeze |
| 12 | 17 | light breeze |
| 13 | 17 | light breeze |
| 14 | 17 | light breeze |
| 15 | 17 | light breeze |
| 16 | 17 | light breeze |
| 17 | 17 | light breeze |
| 18 | 17 | light breeze |
| 19 | 17 | light breeze |
| 20 | 17 | light breeze |
| 21 | 17 | light breeze |
| 22 | 17 | light breeze |
| 23 | 17 | light breeze |
| 24 | 17 | light breeze |
| 25 | 17 | light breeze |
| 26 | 16 | light breeze |
| 27 | 16 | light breeze |
| 28 | 16 | light breeze |
| 29 | 16 | light breeze |
| 30 | 16 | light breeze |
| 31 | 16 | light breeze |
Sunrise & sunset in July
Daylight runs from about 14 h 24 min at the start of July to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 36 minutes over July. Sunrise moves from 4:34 AM to 4:53 AM, and sunset from 6:55 PM to 6:42 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) | 14.4 | 14.3 | 14.3 | 14.3 | 14.3 | 14.3 | 14.3 | 14.3 | 14.3 | 14.3 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.0 | 14.0 | 14.0 | 14.0 | 14.0 | 13.9 | 13.9 | 13.9 | 13.9 | 13.8 |
| Sunrise (AM) | 4:34 | 4:34 | 4:35 | 4:35 | 4:36 | 4:36 | 4:37 | 4:37 | 4:38 | 4:38 | 4:39 | 4:40 | 4:40 | 4:41 | 4:41 | 4:42 | 4:43 | 4:43 | 4:44 | 4:45 | 4:45 | 4:46 | 4:47 | 4:48 | 4:48 | 4:49 | 4:50 | 4:50 | 4:51 | 4:52 | 4:53 |
| Sunset (PM) | 6:55 | 6:55 | 6:55 | 6:55 | 6:55 | 6:55 | 6:55 | 6:54 | 6:54 | 6:54 | 6:54 | 6:53 | 6:53 | 6:53 | 6:52 | 6:52 | 6:51 | 6:51 | 6:50 | 6:50 | 6:49 | 6:49 | 6:48 | 6:47 | 6:47 | 6:46 | 6:45 | 6:45 | 6:44 | 6:43 | 6:42 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.4 | 4:34 | 6:55 |
| 2 | 14.3 | 4:34 | 6:55 |
| 3 | 14.3 | 4:35 | 6:55 |
| 4 | 14.3 | 4:35 | 6:55 |
| 5 | 14.3 | 4:36 | 6:55 |
| 6 | 14.3 | 4:36 | 6:55 |
| 7 | 14.3 | 4:37 | 6:55 |
| 8 | 14.3 | 4:37 | 6:54 |
| 9 | 14.3 | 4:38 | 6:54 |
| 10 | 14.3 | 4:38 | 6:54 |
| 11 | 14.2 | 4:39 | 6:54 |
| 12 | 14.2 | 4:40 | 6:53 |
| 13 | 14.2 | 4:40 | 6:53 |
| 14 | 14.2 | 4:41 | 6:53 |
| 15 | 14.2 | 4:41 | 6:52 |
| 16 | 14.2 | 4:42 | 6:52 |
| 17 | 14.1 | 4:43 | 6:51 |
| 18 | 14.1 | 4:43 | 6:51 |
| 19 | 14.1 | 4:44 | 6:50 |
| 20 | 14.1 | 4:45 | 6:50 |
| 21 | 14.1 | 4:45 | 6:49 |
| 22 | 14.0 | 4:46 | 6:49 |
| 23 | 14.0 | 4:47 | 6:48 |
| 24 | 14.0 | 4:48 | 6:47 |
| 25 | 14.0 | 4:48 | 6:47 |
| 26 | 14.0 | 4:49 | 6:46 |
| 27 | 13.9 | 4:50 | 6:45 |
| 28 | 13.9 | 4:50 | 6:45 |
| 29 | 13.9 | 4:51 | 6:44 |
| 30 | 13.9 | 4:52 | 6:43 |
| 31 | 13.8 | 4:53 | 6:42 |
Solar energy in July
Average shortwave solar energy reaching the ground each day in July, about 5.02 kWh/m².
For context, solar energy here swings from a low near 2.28 kWh/m² to a high of 5.25 kWh/m² in May across the year — July's 5.02 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.6 | 4.6 | 4.7 | 4.7 | 4.7 | 4.8 | 4.8 | 4.8 | 4.8 | 4.9 | 4.9 | 4.9 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 | 5.1 | 5.2 | 5.2 | 5.2 | 5.2 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.4 | 5.4 |
| 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 | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.6 | Bright |
| 2 | 4.6 | Bright |
| 3 | 4.7 | Bright |
| 4 | 4.7 | Bright |
| 5 | 4.7 | Bright |
| 6 | 4.8 | Bright |
| 7 | 4.8 | Bright |
| 8 | 4.8 | Bright |
| 9 | 4.8 | Bright |
| 10 | 4.9 | Bright |
| 11 | 4.9 | Bright |
| 12 | 4.9 | Bright |
| 13 | 5.0 | Bright |
| 14 | 5.0 | Bright |
| 15 | 5.0 | Bright |
| 16 | 5.0 | Bright |
| 17 | 5.0 | Bright |
| 18 | 5.1 | Bright |
| 19 | 5.1 | Bright |
| 20 | 5.1 | Bright |
| 21 | 5.2 | Bright |
| 22 | 5.2 | Bright |
| 23 | 5.2 | Bright |
| 24 | 5.2 | Bright |
| 25 | 5.3 | Bright |
| 26 | 5.3 | Bright |
| 27 | 5.3 | Bright |
| 28 | 5.3 | Bright |
| 29 | 5.3 | Bright |
| 30 | 5.4 | Bright |
| 31 | 5.4 | Bright |
Hazard calendar for Yokosuka
In July, Yokosuka sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Yokosuka sits in the Pacific typhoon belt; the season peaks July–October.
Is July a good time to visit Yokosuka?
Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
July is a reasonable time to visit Yokosuka for sightseeing.
What to pack for Yokosuka in July
From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In July, Yokosuka sees daytime highs around 25°C and nights near 23°C. Worth packing: light clothes, rain gear and sun protection. About 12 days see rain.
Sea temperature near Yokosuka in July
The nearest coast averages about 24°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 18 km away) is warmest in August at about 26°C and coldest in February near 15°C.
It's comfortable for a long swim from May 31 to Nov 26 — about 5.9 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 16 | 15 | 16 | 17 | 19 | 21 | 24 | 26 | 25 | 23 | 21 | 18 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Warm | Warm | Refreshing | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 16 | Cool |
| Feb | 15 | Cool |
| Mar | 16 | Cool |
| Apr | 17 | Cool |
| May | 19 | Cool |
| Jun | 21 | Refreshing |
| Jul | 24 | Refreshing |
| Aug | 26 | Warm |
| Sep | 25 | Warm |
| Oct | 23 | Refreshing |
| Nov | 21 | Refreshing |
| Dec | 18 | Cool |
UV index in Yokosuka in July
Clear-sky midday UV in July peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Yokosuka peaks around July 22 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 | 5 | 7 | 8 | 9 | 10 | 10 | 8 | 6 | 4 | 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 | 5 | Moderate |
| Apr | 7 | 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 | 4 | Moderate |
| Dec | 2 | Moderate |
Air quality in Yokosuka in July
Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.
Air quality in Yokosuka is worst in April — around 26 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 12 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) | 14 | 25 | 23 | 26 | 21 | 18 | 13 | 12 | 12 | 14 | 14 | 12 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 14 | Moderate |
| Feb | 25 | Moderate |
| Mar | 23 | Moderate |
| Apr | 26 | Moderate |
| May | 21 | Moderate |
| Jun | 18 | Moderate |
| Jul | 13 | Moderate |
| Aug | 12 | Moderate |
| Sep | 12 | Moderate |
| Oct | 14 | Moderate |
| Nov | 14 | Moderate |
| Dec | 12 | Good |
Where is Yokosuka?
Yokosuka sits at 35.3°N, 139.7°E, 9 m above sea level, in Japan. The nearest listed city is Kurihama, 7.0 km away.
Topography around Yokosuka
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Yokosuka.
Within 3 km, the terrain around Yokosuka has only modest variations in elevation — a maximum elevation change of 133 m around an average of 19 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 237 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,738 m.
The land around Yokosuka is covered by water (41%), artificial surfaces (35%) and trees (23%) within 3 km, water (62%) within 16 km, and water (43%), trees (30%) and artificial surfaces (20%) 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 Yokosuka (35.2836°, 139.6672°, elevation 9 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).