Middelharnis weather in August

In August, Middelharnis sees average daytime highs of 22°C and overnight lows near 14°C, with 76 mm of rain across 13.1 wet days and about 14.4 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 20°C by the end. The sky is clear or mostly clear about 19% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 15 h 18 min at the start of August to 13 h 30 min by month's end. Set against the rest of the year, August is Middelharnis's 2nd-clearest and 12th-windiest month. For the whole year in context, see Middelharnis's year-round climate.

Daytime high
22°
2nd warmest
Overnight low
14°
12th coldest
Rainfall
76 mm
13.1 wet days
Daylight
14 h 24 min
5:34 AM – 8:00 PM
Cloud cover
63%
2nd clearest
Wind
14 km/h
12th windiest
Solar energy
4.51 kWh/m²
Travel score
6.1
out of 10

Middelharnis is town in South Holland, the Netherlands.

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 20°C by the end.

A typical August day in Middelharnis 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
82215
92215
102215
112215
122215
132215
142215
152214
162214
172214
182214
192214
202214
212114
222114
232114
242114
252114
262114
272114
282113
292113
302013
312013

How August really feels in Middelharnis

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.

Middelharnis weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6112.10.88.10.4
Feb / 5110.81.39.60.7
Mar10° / 5211.30.711.52.1
Apr14° / 4610.8013.63.8
May17° / 5911.8015.45.2
Jun20° / 12°6111.1016.35.9
Jul22° / 14°7512.90166.2
Aug22° / 14°7613.1014.46.1
Sep19° / 12°6411.6012.45.6
Oct15° / 6712.5010.43.9
Nov10° / 6613.20.38.61.9
Dec / 7213.90.97.60.7

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 24% of August, with mostly cloudy or overcast conditions the remaining 57%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24852
34753
44753
54654
64654
74654
84654
94555
104456
114456
124456
134456
144357
154357
164357
174357
184357
194258
204258
214258
224258
234258
244159
254159
264060
273961
283961
293961
303862
313862

Chance of precipitation in August

Any precipitation

Middelharnis gets around 76 mm of rain over 13.1 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 43% and peaks near 45% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
141
241
341
441
541
640
740
841
941
1041
1142
1242
1343
1443
1543
1644
1744
1845
1945
2045
2145
2245
2345
2444
2544
2644
2743
2843
2942
3042
3141

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 43% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12748232
22748232
32748232
42847232
52946232
63046232
73045222
83145222
93144222
103244223
113243223
123343223
133342223
143342213
153442213
163442213
173442203
183442203
193543193
203543193
213643183
223743173
233843173
243942163
254142152
264241152
274440142
284540132
294739132
304838121
315038121

Wind in August

Winds average 14 km/h in August, the calmest month.

Across August, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 h 18 min at the start of August to 13 h 30 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 5:11 AM to 5:59 AM, and sunset from 8:28 PM to 7:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.35:118:28
215.25:128:27
315.25:148:25
415.15:158:23
515.15:178:21
615.05:188:20
715.05:208:18
814.95:228:16
914.95:238:14
1014.85:258:12
1114.75:268:10
1214.75:288:08
1314.65:308:06
1414.65:318:04
1514.55:338:02
1614.45:348:00
1714.45:367:58
1814.35:387:56
1914.25:397:54
2014.25:417:52
2114.15:437:50
2214.15:447:48
2314.05:467:46
2413.95:487:43
2513.95:497:41
2613.85:517:39
2713.75:537:37
2813.75:547:34
2913.65:567:32
3013.55:587:30
3113.55:597:27

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.51 kWh/m².

For context, solar energy here swings from a low near 0.6 kWh/m² to a high of 5.48 kWh/m² in June across the year — August's 4.51 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.0Bright
45.0Bright
55.0Bright
64.9Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.7Bright
124.7Bright
134.6Bright
144.6Bright
154.5Bright
164.5Bright
174.5Bright
184.4Bright
194.4Bright
204.3Bright
214.3Bright
224.2Bright
234.2Bright
244.1Bright
254.1Bright
264.0Bright
274.0Moderate
283.9Moderate
293.9Moderate
303.8Moderate
313.8Moderate
Planning a trip in August

Is August a good time to visit Middelharnis?

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

6.1
Sightseeing
2nd-best month of the year
4.1
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Middelharnis for sightseeing.

What to pack for Middelharnis in August

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

In August, Middelharnis sees daytime highs around 22°C and nights near 14°C. Worth packing: rain gear and sun protection. About 13 days see rain.

rain gearsun protection

Sea temperature near Middelharnis 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 24 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
Jan7Bracing
Feb6Bracing
Mar6Bracing
Apr9Bracing
May12Bracing
Jun15Bracing
Jul17Cool
Aug19Cool
Sep18Cool
Oct15Cool
Nov12Bracing
Dec9Bracing

UV index in Middelharnis 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 Middelharnis peaks around June 22 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 22UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May5High
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Middelharnis?

Middelharnis sits at 51.8°N, 4.2°E, 2 m above sea level, in The Netherlands. The nearest listed city is Hellevoetsluis, 9.0 km away.

HoogvlietOud-BeijerlandRhoonVlaardingenSteenbergen

Topography around Middelharnis

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

Within 3 km, the terrain around Middelharnis has only modest variations in elevation — a maximum elevation change of 20 m around an average of 1 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 25 m; within 80 km, only modest variations in elevation — a maximum elevation change of 77 m.

The land around Middelharnis is covered by cropland (51%) and grassland (21%) within 3 km, cropland (35%), water (31%) and grassland (20%) within 16 km, and water (33%) and grassland (25%) within 80 km.

3 km
20 m
16 km
25 m
80 km
77 m
treesgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Hellevoetsluis 9.0 km · Spijkenisse 15 km · Hoogvliet 18 km · Oud-Beijerland 19 km · Maassluis 19 km · Rhoon 21 km · Vlaardingen 21 km · Steenbergen 22 km

The Netherlands travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 84% of US
price level, 2025
GDP per capita
$73,684
2025
Happiness
7.2 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
4
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 624
Religion
none 54%Roman Catholic 20%Protestant 15%other 6%

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 Middelharnis (51.7575°, 4.1653°, elevation 2 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).