Herstal weather in July

In July, Herstal sees average daytime highs of 23°C and overnight lows near 14°C, with 78 mm of rain across 12.9 wet days and about 15.8 hours of daylight. It is the 1st-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 22°C in the first days to 24°C by the end. The sky is clear or mostly clear about 19% of the time in July, and the air most often feels dry.

Daylight stretches from about 16 h 12 min at the start of July to 15 h 12 min by month's end. Set against the rest of the year, July is Herstal's 2nd-clearest and 11th-windiest month. For the whole year in context, see Herstal's year-round climate.

Daytime high
23°
1st warmest
Overnight low
14°
12th coldest
Rainfall
78 mm
12.9 wet days
Daylight
15 h 48 min
4:48 AM – 8:38 PM
Cloud cover
65%
2nd clearest
Wind
12 km/h
11th windiest
Solar energy
5.14 kWh/m²
Travel score
6.3
out of 10

Herstal is municipality section in the province of Liège, Belgium.

Air quality
Good
PM2.5 8.6 µg/m³ · 2019

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 22°C in the first days to 24°C by the end.

A typical July day in Herstal reaches about 23°C in the afternoon and slips back to 14°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 29°C. Set against its neighbours, July runs about 2°C warmer than June and on par with August.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12213
22213
32213
42213
52213
62213
72213
82214
92214
102214
112214
122214
132214
142314
152314
162314
172314
182314
192314
202314
212314
222314
232314
242314
252414
262414
272414
282414
292414
302414
312414

How July really feels in Herstal

Once humidity and wind are folded in, July 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

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

Herstal weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 701328.30.2
Feb / 63122.99.70.5
Mar10° / 6413.21.211.52.1
Apr14° / 5211.20.113.53.9
May18° / 6312.7015.25.3
Jun21° / 12°7412.7016.25.8
Jul23° / 14°7812.9015.86.3
Aug22° / 14°7912.3014.36.3
Sep19° / 11°6210.8012.45.8
Oct14° / 6311.8010.43.9
Nov / 6712.60.58.71.7
Dec / 82142.67.80.4

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 17% of July, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13664
23565
33466
43466
53466
63466
73268
83367
93367
103367
113367
123367
133466
143466
153466
163664
173664
183763
193763
203862
213862
223961
233961
243961
254060
264060
274159
284159
294258
304258
314258

Chance of precipitation in July

Any precipitation

Herstal gets around 78 mm of rain over 12.9 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 41% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
140
241
341
442
542
643
743
843
943
1043
1143
1242
1342
1442
1542
1642
1742
1842
1942
2041
2141
2241
2340
2440
2540
2640
2739
2839
2939
3039
3139

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the dry band about 48% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15830111
25631121
35532121
45433121
55433121
65334121
75234131
85234131
95135131
105135131
115135131
125234131
135134141
145134141
155034151
164934151
174935161
184835171
194735171
204635181
214536191
224436191
234336201
244237201
254138201
264039201
273940201
283941201
293842201
303743191
313644191

Wind in July

Winds average 12 km/h in July.

Across July, daily wind ranges from about 11 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
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 16 h 12 min at the start of July to 15 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over July. Sunrise moves from 4:35 AM to 5:07 AM, and sunset from 8:47 PM to 8:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
116.24:358:47
216.24:358:47
316.24:368:46
416.24:378:46
516.14:378:46
616.14:388:45
716.14:398:45
816.14:408:44
916.04:418:44
1016.04:428:43
1116.04:438:42
1216.04:448:42
1315.94:458:41
1415.94:468:40
1515.94:478:39
1615.84:488:38
1715.84:498:37
1815.84:508:36
1915.74:518:35
2015.74:538:34
2115.74:548:33
2215.64:558:32
2315.64:568:31
2415.54:588:30
2515.54:598:28
2615.45:008:27
2715.45:028:26
2815.45:038:24
2915.35:058:23
3015.35:068:21
3115.25:078:20

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.14 kWh/m².

For context, solar energy here swings from a low near 0.64 kWh/m² to a high of 5.31 kWh/m² in June across the year — July's 5.14 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.1Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in July

Is July a good time to visit Herstal?

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

6.3
Sightseeing
1st-best month of the year
4.8
Beach & pool
1st-best month of the year

July is a reasonable time to visit Herstal for sightseeing.

What to pack for Herstal in July

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

In July, Herstal sees daytime highs around 23°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in Herstal in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Herstal peaks around July 13 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 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 13UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul7High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Herstal?

Herstal sits at 50.7°N, 5.6°E, 81 m above sea level, in Belgium. The nearest listed city is Grivegnée, 5.0 km away.

Topography around Herstal

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

Within 3 km, the terrain around Herstal has only modest variations in elevation — a maximum elevation change of 182 m around an average of 103 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 294 m; within 80 km, large variations in elevation — a maximum elevation change of 1,001 m.

The land around Herstal is covered by artificial surfaces (41%) and trees (37%) within 3 km, trees (32%), grassland (27%) and cropland (24%) within 16 km, and trees (40%), grassland (26%) and cropland (26%) within 80 km.

3 km
182 m
16 km
294 m
80 km
1,001 m
treesgrasslandcroplandartificial surfaceswater
July weather nearby: Grivegnée 5.0 km · Liège 5.0 km · Oupeye 6.0 km · Fléron 7.0 km · Ans 7.0 km · Saint-Nicolas 8.0 km · Chaudfontaine 9.0 km · Visé 10 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 Herstal (50.6641°, 5.6235°, elevation 81 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. 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).