Sầm Sơn weather in July

In July, Sầm Sơn sees average daytime highs of 30°C and overnight lows near 28°C, with 212 mm of rain across 12.7 wet days and about 13.1 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 13% of the time in July, and the air most often feels miserable.

Daylight stretches from about 13 h 12 min at the start of July to 12 h 54 min by month's end. Set against the rest of the year, July is Sầm Sơn's 11th-clearest and 3rd-windiest month. For the whole year in context, see Sầm Sơn's year-round climate.

Daytime high
30°
1st warmest
Overnight low
28°
12th coldest
Rainfall
212 mm
12.7 wet days
Daylight
13 h 06 min
5:29 AM – 6:35 PM
Cloud cover
81%
11th clearest
Wind
17 km/h
3rd windiest
Solar energy
5.37 kWh/m²
Travel score
4.2
out of 10

Sầm Sơn is city in Thanh Hóa province.

Density
2,888/km²
people per km²
Founded
1981

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical July day in Sầm Sơn reaches about 30°C in the afternoon and slips back to 28°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 32°C. Set against its neighbours, July runs on par with June and on par with August.

25°28°30°33°35°151015202531
Avg high (°C)Avg low (°C)
13129
23129
33129
43129
53129
63129
73129
83129
93129
103129
113129
123129
133128
143128
153128
163028
173028
183028
193028
203028
213028
223028
233028
243028
253028
263028
273028
283028
293028
303028
313028

How July really feels in Sầm Sơn

Once humidity and wind are folded in, July averages 31 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
31
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.

Sầm Sơn weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan19° / 17°5510.610.95.9
Feb20° / 18°368.411.36.1
Mar22° / 20°529.711.96.4
Apr25° / 23°627.512.47.0
May28° / 26°13912.212.95.5
Jun30° / 28°1461113.24.3
Jul30° / 28°21212.713.14.2
Aug30° / 28°31220.112.73.7
Sep29° / 26°36820.212.14.1
Oct27° / 24°24116.211.55.7
Nov24° / 22°829.911.16.9
Dec21° / 18°548.910.86.5

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 7% of July, with mostly cloudy or overcast conditions the remaining 80%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11882
21981
32179
42179
52179
62179
72476
82476
92377
102278
112278
122278
132278
142179
152080
162080
171981
181981
191882
201783
211783
221783
231882
241783
251783
261981
271981
281981
292080
302179
312179

Chance of precipitation in July

Any precipitation

Sầm Sơn gets around 212 mm of rain over 12.7 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 42% and peaks near 55% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
137
237
336
436
536
636
736
836
936
1036
1136
1237
1337
1438
1539
1640
1741
1841
1942
2043
2144
2245
2346
2447
2548
2649
2750
2851
2953
3054
3155

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the miserable band about 97% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
1298
2298
3298
4397
5397
6397
7397
8397
9397
10397
11496
12496
13397
14397
15397
16397
17397
18397
19397
20397
21397
22397
23397
24397
25397
26397
27397
28397
29298
30298
31298

Wind in July

Winds average 17 km/h in July.

Across July, daily wind ranges from about 15 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3015light breeze
3115light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 13 h 12 min at the start of July to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over July. Sunrise moves from 5:24 AM to 5:35 AM, and sunset from 6:35 PM to 6:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.25:246:35
213.25:256:35
313.25:256:35
413.25:256:35
513.25:266:35
613.25:266:35
713.25:266:35
813.15:276:35
913.15:276:35
1013.15:276:35
1113.15:286:35
1213.15:286:35
1313.15:286:35
1413.15:296:35
1513.15:296:35
1613.15:296:35
1713.15:306:34
1813.15:306:34
1913.15:316:34
2013.05:316:34
2113.05:316:34
2213.05:326:33
2313.05:326:33
2413.05:326:33
2513.05:336:32
2613.05:336:32
2713.05:346:32
2813.05:346:31
2912.95:346:31
3012.95:356:30
3112.95:356:30

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.37 kWh/m².

For context, solar energy here swings from a low near 2.6 kWh/m² to a high of 5.55 kWh/m² in May across the year — July's 5.37 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.4Bright
165.4Bright
175.4Bright
185.3Bright
195.3Bright
205.3Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
315.0Bright
Planning a trip in July

Hazard calendar for Sầm Sơn

In seasonPeak

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

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

Sầm Sơn's monsoon runs July–October, when most of the year's rain falls.

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

Is July a good time to visit Sầm Sơn?

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

4.2
Sightseeing
10th-best month of the year
6.0
Beach & pool
4th-best month of the year

July is a reasonable time to visit Sầm Sơn for sightseeing.

What to pack for Sầm Sơn in July

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

In July, Sầm Sơn sees daytime highs around 30°C and nights near 28°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near Sầm Sơn in July

The nearest coast averages about 30°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 30°C and coldest in February near 21°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan21Refreshing
Feb21Refreshing
Mar21Refreshing
Apr24Refreshing
May28Warm
Jun29Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct28Warm
Nov26Warm
Dec23Refreshing

UV index in Sầm Sơn in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sầm Sơn peaks around August 11 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 6 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighAug 11UV 12Dec 16UV 6
UV index (midday)Level
Jan7Very high
Feb9Very high
Mar10Very high
Apr9Very high
May10Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep10Very high
Oct9Very high
Nov7Very high
Dec6High

Air quality in Sầm Sơn 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 Sầm Sơn is worst in April — around 65 µg/m³ PM2.5 (unhealthy), about 3.3× the cleanest month (July, 20 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyApr 1065 µg/m³Jul 1920 µg/m³
PM2.5 (µg/m³)Level
Jan65Unhealthy
Feb63Unhealthy
Mar63Unhealthy
Apr65Unhealthy
May43Poor
Jun25Moderate
Jul20Moderate
Aug23Moderate
Sep33Moderate
Oct46Poor
Nov55Poor
Dec64Unhealthy
Location & terrain

Where is Sầm Sơn?

Sầm Sơn sits at 19.7°N, 105.9°E, 10 m above sea level, in Vietnam. The nearest listed city is Thanh Hóa, 16 km away.

Topography around Sầm Sơn

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

Within 3 km, the terrain around Sầm Sơn has only modest variations in elevation — a maximum elevation change of 78 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 176 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,500 m.

The land around Sầm Sơn is covered by water (58%) within 3 km, water (60%) within 16 km, and trees (39%), water (33%) and cropland (22%) within 80 km.

3 km
78 m
16 km
176 m
80 km
1,500 m
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Thanh Hóa 16 km · Nga Sơn 31 km · Bỉm Sơn 39 km · Nghi Sơn 46 km · Thị Trấn Lam Sơn 55 km · Hoàng Mai 55 km · Ninh Binh 59 km · Nam Định 83 km

Vietnam travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / C / F
220 V · 50 Hz
Prices
≈ 29% of US
price level, 2025
GDP per capita
$5,066
2025
Happiness
6.4 / 10
World Happiness, 2025
Safe drinking water
59%
of population, 2024
Homicide rate
1.5
per 100k, 2011
Road deaths
30.6
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 500
Religion
none 86%Catholic 6%Buddhist 6%Protestant 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 Sầm Sơn (19.7333°, 105.9°, elevation 10 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).