Sasebo weather in July

In July, Sasebo sees average daytime highs of 29°C and overnight lows near 24°C, with 285 mm of rain across 16.3 wet days and about 14 hours of daylight. It is the 2nd-warmest and 2nd-wettest month of the year here.

Highs climb over the month, from about 27°C in the first days to 31°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 12 min at the start of July to 13 h 42 min by month's end. Set against the rest of the year, July is Sasebo's 10th-clearest and 9th-windiest month. For the whole year in context, see Sasebo's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
24°
11th coldest
Rainfall
285 mm
16.3 wet days
Daylight
14 hours
5:27 AM – 7:27 PM
Cloud cover
70%
10th clearest
Wind
11 km/h
9th windiest
Solar energy
4.85 kWh/m²
Travel score
4.4
out of 10

Sasebo is city in Nagasaki Prefecture, Japan.

Density
571/km²
people per km²
Founded
1902

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 27°C in the first days to 31°C by the end.

A typical July day in Sasebo reaches about 29°C in the afternoon and slips back to 24°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 32°C. Set against its neighbours, July runs about 4°C warmer than June and about 2°C cooler than August.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12722
22723
32723
42823
52823
62823
72823
82823
92824
102824
112924
122924
132924
142924
152924
162924
173024
183025
193025
203025
213025
223025
233125
243125
253125
263125
273125
283125
293125
303125
313125

How July really feels in Sasebo

Once humidity and wind are folded in, July averages 21 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
21
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Sasebo weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 618.40.710.12.3
Feb11° / 728.40.510.82.8
Mar15° / 11810.50.111.74.3
Apr19° / 12°13810.4012.86.0
May23° / 16°14910.1013.76.7
Jun26° / 20°30815.7014.15.5
Jul29° / 24°28516.30144.4
Aug31° / 25°17814.7013.24.0
Sep28° / 22°18612.3012.25.8
Oct23° / 17°1026.9011.27.4
Nov18° / 11°908.1010.36.0
Dec12° / 697.50.19.83.5

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 12% of July, with mostly cloudy or overcast conditions the remaining 66%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11783
21882
31882
41981
51981
62080
72278
82278
92377
102575
112674
122872
132872
143169
153169
163367
173565
183565
193862
203961
214258
224258
234555
244555
254753
264852
275050
285050
295149
305050
315149

Chance of precipitation in July

Any precipitation

Sasebo gets around 285 mm of rain over 16.3 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 53% and peaks near 68% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
168
267
367
466
565
664
763
862
961
1059
1158
1256
1355
1454
1552
1651
1750
1848
1947
2046
2145
2244
2344
2443
2543
2642
2742
2842
2942
3042
3142

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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 50% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
114314914
214305016
303285217
403265219
502255221
602235322
702225224
802215225
902205127
1002185228
1102175229
1202165131
1302155132
1402135134
1502125135
1602115037
1701105138
180195139
190185140
200185041
210174943
220174944
230164845
240154846
250154747
260054748
270044749
280044649
290044650
300044650
310044650

Wind in July

Winds average 11 km/h in July.

Across July, daily wind ranges from about 10 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512light breeze
612light breeze
712light breeze
812light breeze
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 12 min at the start of July to 13 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over July. Sunrise moves from 5:19 AM to 5:37 AM, and sunset from 7:29 PM to 7:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.25:197:29
214.25:207:29
314.25:207:29
414.15:217:29
514.15:217:29
614.15:227:29
714.15:227:29
814.15:227:29
914.15:237:29
1014.15:247:28
1114.15:247:28
1214.15:257:28
1314.05:257:28
1414.05:267:27
1514.05:267:27
1614.05:277:27
1714.05:277:26
1814.05:287:26
1913.95:297:25
2013.95:297:25
2113.95:307:24
2213.95:317:24
2313.95:317:23
2413.85:327:23
2513.85:337:22
2613.85:337:21
2713.85:347:21
2813.85:357:20
2913.75:357:19
3013.75:367:18
3113.75:377:18

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 4.85 kWh/m².

For context, solar energy here swings from a low near 2.13 kWh/m² to a high of 5.4 kWh/m² in May across the year — July's 4.85 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.0Bright
24.0Bright
34.1Bright
44.1Bright
54.2Bright
64.2Bright
74.3Bright
84.4Bright
94.4Bright
104.5Bright
114.6Bright
124.6Bright
134.7Bright
144.8Bright
154.8Bright
164.9Bright
175.0Bright
185.0Bright
195.1Bright
205.2Bright
215.2Bright
225.2Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
315.4Bright
Planning a trip in July

Hazard calendar for Sasebo

In seasonPeak

In July, Sasebo sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Sasebo sits in the Pacific typhoon belt; the season peaks July–October.

Sasebo's rainy season runs May–September, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is July a good time to visit Sasebo?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.4
Sightseeing
7th-best month of the year
5.7
Beach & pool
3rd-best month of the year

July is a reasonable time to visit Sasebo for sightseeing.

What to pack for Sasebo in July

From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In July, Sasebo sees daytime highs around 29°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 16 days see rain.

light clothesrain gearsun protection

Sea temperature near Sasebo in July

The nearest coast averages about 25°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 27°C and coldest in February near 15°C.

It's comfortable for a long swim from Jun 1 to Nov 26 — about 5.9 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Bracing
Mar15Cool
Apr16Cool
May19Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov21Refreshing
Dec18Cool

UV index in Sasebo in July

LowModerateHighVery highExtreme

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 Sasebo peaks around July 18 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 18UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Sasebo in July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.

Air quality in Sasebo is worst in April — around 24 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 11 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateGoodModerateApr 1324 µg/m³Oct 1212 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb19Moderate
Mar23Moderate
Apr24Moderate
May21Moderate
Jun17Moderate
Jul12Good
Aug12Moderate
Sep12Good
Oct11Good
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Sasebo?

Sasebo sits at 33.2°N, 129.7°E, 8 m above sea level, in Japan. The nearest listed city is Arita, 16 km away.

Topography around Sasebo

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sasebo.

Within 3 km, the terrain around Sasebo has significant variations in elevation — a maximum elevation change of 561 m around an average of 104 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 779 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,455 m.

The land around Sasebo is covered by trees (46%) and artificial surfaces (38%) within 3 km, trees (58%) and water (28%) within 16 km, and water (66%) and trees (24%) within 80 km.

3 km
561 m
16 km
779 m
80 km
1,455 m
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Arita 16 km · Imarichō-kō 18 km · Matsuura 19 km · Saikai 21 km · Ureshinomachi-shimojuku 27 km · Hirado 27 km · Takeo 28 km · Kashima 35 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
Shintoism 49%Buddhism 46%other 4%Christianity 1%

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 Sasebo (33.1683°, 129.725°, elevation 8 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).