Sint-Gillis-Waas weather in August

In August, Sint-Gillis-Waas sees average daytime highs of 22°C and overnight lows near 14°C, with 73 mm of rain across 12 wet days and about 14.4 hours of daylight. It is the 2nd-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 21°C by the end. The sky is clear or mostly clear about 17% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 15 h 12 min at the start of August to 13 h 24 min by month's end. Set against the rest of the year, August is Sint-Gillis-Waas's 1st-clearest and 12th-windiest month. For the whole year in context, see Sint-Gillis-Waas's year-round climate.

Daytime high
22°
2nd warmest
Overnight low
14°
11th coldest
Rainfall
73 mm
12 wet days
Daylight
14 h 24 min
5:36 AM – 7:59 PM
Cloud cover
63%
1st clearest
Wind
12 km/h
12th windiest
Solar energy
4.41 kWh/m²
Travel score
6.3
out of 10

Sint-Gillis-Waas is town in Sint-Gillis-Waas municipality, Belgium.

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 23°C in the first days to 21°C by the end.

A typical August day in Sint-Gillis-Waas reaches about 22°C in the afternoon and slips back to 14°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 27°C. Set against its neighbours, August runs on par with July and about 3°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12315
22315
32315
42315
52315
62315
72315
82315
92315
102315
112315
122315
132215
142215
152215
162215
172215
182215
192214
202214
212214
222214
232214
242114
252114
262114
272114
282114
292114
302113
312113

How August really feels in Sint-Gillis-Waas

Once humidity and wind are folded in, August 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.

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

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Sint-Gillis-Waas weather by month

How August compares with the rest of the year at a glance. August 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
Jan / 6111.70.98.20.5
Feb / 53111.29.60.8
Mar10° / 5211.20.611.52.3
Apr14° / 4811.2013.53.9
May18° / 10°6111.8015.35.3
Jun20° / 13°6411.3016.35.9
Jul22° / 15°7412.4015.96.3
Aug22° / 14°7312014.46.3
Sep19° / 12°5710.6012.45.8
Oct15° / 5911.5010.44.1
Nov10° / 6412.10.48.72.0
Dec / 7113.217.70.7

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 23% of August, with mostly cloudy or overcast conditions the remaining 59%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24456
34357
44357
54357
64456
74357
84357
94357
104357
114357
124357
134357
144258
154258
164159
174159
184159
194060
204060
213961
223961
233961
243862
253862
263862
273763
283763
293664
303664
313664

Chance of precipitation in August

Any precipitation

Sint-Gillis-Waas gets around 73 mm of rain over 12 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 39% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
238
338
438
538
638
738
839
939
1039
1139
1240
1340
1440
1541
1641
1741
1841
1940
2040
2140
2239
2339
2439
2538
2637
2737
2836
2935
3035
3134

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 45% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12149255
22149255
32249245
42249245
52349245
62349245
72448235
82448235
92547235
102547235
112646235
122746235
132745235
142845235
152944234
162944224
173044224
183044214
193144214
203144204
213344194
223444194
233543184
243743174
253842163
264041153
274241153
284340143
294539142
304738132
314837132

Wind in August

Winds average 12 km/h in August, the calmest month.

Across August, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 h 12 min at the start of August to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 108 minutes over August. Sunrise moves from 5:13 AM to 6:00 AM, and sunset from 8:26 PM to 7:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.25:138:26
215.25:148:25
315.15:168:23
415.15:178:21
515.05:198:20
615.05:208:18
714.95:228:16
814.95:238:14
914.85:258:13
1014.75:278:11
1114.75:288:09
1214.65:308:07
1314.65:318:05
1414.55:338:03
1514.45:348:01
1614.45:367:59
1714.35:387:57
1814.35:397:55
1914.25:417:53
2014.15:427:51
2114.15:447:49
2214.05:467:47
2314.05:477:45
2413.95:497:42
2513.85:517:40
2613.85:527:38
2713.75:547:36
2813.65:557:34
2913.65:577:31
3013.55:597:29
3113.46:007:27

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.41 kWh/m².

For context, solar energy here swings from a low near 0.62 kWh/m² to a high of 5.33 kWh/m² in June across the year — August's 4.41 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
34.9Bright
44.9Bright
54.9Bright
64.8Bright
74.8Bright
84.8Bright
94.7Bright
104.7Bright
114.7Bright
124.6Bright
134.6Bright
144.5Bright
154.5Bright
164.4Bright
174.4Bright
184.3Bright
194.3Bright
204.2Bright
214.2Bright
224.1Bright
234.1Bright
244.0Bright
254.0Moderate
263.9Moderate
273.9Moderate
283.8Moderate
293.8Moderate
303.8Moderate
313.7Moderate
Planning a trip in August

Is August a good time to visit Sint-Gillis-Waas?

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

6.3
Sightseeing
1st-best month of the year
4.4
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Sint-Gillis-Waas for sightseeing.

What to pack for Sint-Gillis-Waas in August

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

In August, Sint-Gillis-Waas sees daytime highs around 22°C and nights near 14°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Sint-Gillis-Waas in August

The nearest coast averages about 19°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 55 km away) is warmest in August at about 19°C and coldest in February near 6°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan6Bracing
Feb6Bracing
Mar6Bracing
Apr9Bracing
May12Bracing
Jun16Cool
Jul18Cool
Aug19Cool
Sep18Cool
Oct15Bracing
Nov11Bracing
Dec8Bracing

UV index in Sint-Gillis-Waas in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Sint-Gillis-Waas peaks around June 23 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 23UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Sint-Gillis-Waas in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Sint-Gillis-Waas is worst in April — around 17 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1317 µg/m³Dec 1511 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb13Moderate
Mar17Moderate
Apr17Moderate
May16Moderate
Jun15Moderate
Jul13Moderate
Aug15Moderate
Sep14Moderate
Oct12Moderate
Nov12Good
Dec11Good
Location & terrain

Where is Sint-Gillis-Waas?

Sint-Gillis-Waas sits at 51.2°N, 4.1°E, 5 m above sea level, in Belgium. The nearest listed city is Stekene, 6.0 km away.

LokerenBornem

Topography around Sint-Gillis-Waas

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sint-Gillis-Waas.

Within 3 km, the terrain around Sint-Gillis-Waas has only modest variations in elevation — a maximum elevation change of 25 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 71 m; within 80 km, significant variations in elevation — a maximum elevation change of 290 m.

The land around Sint-Gillis-Waas is covered by cropland (39%) and grassland (36%) within 3 km, cropland (33%) and grassland (28%) within 16 km, and cropland (31%) and grassland (23%) within 80 km.

3 km
25 m
16 km
71 m
80 km
290 m
treesgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Stekene 6.0 km · Sint-Niklaas 6.0 km · Beveren 9.0 km · Temse 12 km · Hamme 13 km · Zwijndrecht 14 km · Lokeren 16 km · Bornem 16 km

Belgium travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 81% of US
price level, 2025
GDP per capita
$60,750
2025
Happiness
6.9 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2021
Road deaths
5.8
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 608
Religion
Roman Catholic 57%nonbeliever/agnostic 20%atheist 9%Muslim 7%

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 Sint-Gillis-Waas (51.2191°, 4.1237°, elevation 5 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. 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).