Diepenbeek weather in September

In September, Diepenbeek sees average daytime highs of 19°C and overnight lows near 11°C, with 60 mm of rain across 10.5 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 18°C by the end. The sky is clear or mostly clear about 20% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Diepenbeek's 3rd-clearest and 8th-windiest month. For the whole year in context, see Diepenbeek's year-round climate.

Daytime high
19°
4th warmest
Overnight low
11°
9th coldest
Rainfall
60 mm
10.5 wet days
Daylight
12 h 24 min
6:21 AM – 6:44 PM
Cloud cover
66%
3rd clearest
Wind
12 km/h
8th windiest
Solar energy
3.1 kWh/m²
Travel score
5.9
out of 10

Diepenbeek is town in Diepenbeek municipality, Belgium.

Air quality
Moderate
PM2.5 14.3 µg/m³ · 2018

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 18°C by the end.

A typical September day in Diepenbeek reaches about 19°C in the afternoon and slips back to 11°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 25°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12113
22112
32112
42112
52112
62112
72012
82012
92012
102012
112012
122012
132011
142011
151911
161911
171911
181911
191911
201911
211911
221911
231811
241810
251810
261810
271810
281810
291710
301710

How September really feels in Diepenbeek

Once humidity and wind are folded in, September 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

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

Diepenbeek weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6612.21.48.20.3
Feb / 6011.429.70.7
Mar11° / 6012.60.911.52.3
Apr15° / 4810.60.113.54.2
May19° / 5912.1015.35.5
Jun21° / 12°6812.2016.26.0
Jul23° / 14°7612.7015.86.4
Aug23° / 14°7412014.36.4
Sep19° / 11°6010.5012.45.9
Oct15° / 6111.1010.44.1
Nov10° / 6412.40.38.71.9
Dec / 7713.51.97.80.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 64%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23565
33565
43565
53565
63565
73664
83763
93763
103763
113763
123862
133862
143862
153961
163862
173961
183961
193961
203862
213862
223763
233763
243664
253466
263367
273367
283169
293070
303070

Chance of precipitation in September

Any precipitation

Diepenbeek gets around 60 mm of rain over 10.5 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 35% and peaks near 39% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
134
234
334
434
534
635
735
835
935
1035
1135
1235
1335
1435
1535
1635
1735
1835
1935
2035
2135
2235
2335
2436
2536
2637
2738
2838
2939
3039

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 74% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
1612910
2622810
364279
464279
566268
666268
767258
867258
968248
1070237
1171227
1272217
1374206
1474206
1576195
1677185
1778184
1878184
1980173
2080173
2181172
2281172
2380182
2480182
2581181
2681181
2781181
2881181
2981181
3081181

Wind in September

Winds average 12 km/h in September.

Across September, 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.

051015151015202530
Wind speed (km/h)Feels
111calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 24 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 114 minutes over September. Sunrise moves from 5:57 AM to 6:44 AM, and sunset from 7:19 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:577:19
213.35:597:17
313.26:007:14
413.26:027:12
513.16:047:10
613.06:057:07
713.06:077:05
812.96:087:03
912.86:107:00
1012.86:126:58
1112.76:136:56
1212.66:156:53
1312.66:166:51
1412.56:186:49
1512.46:206:46
1612.46:216:44
1712.36:236:42
1812.26:246:39
1912.26:266:37
2012.16:286:35
2112.06:296:32
2212.06:316:30
2311.96:336:28
2411.96:346:25
2511.86:366:23
2611.76:376:21
2711.76:396:18
2811.66:416:16
2911.56:426:14
3011.56:446:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.1 kWh/m².

For context, solar energy here swings from a low near 0.62 kWh/m² to a high of 5.25 kWh/m² in June across the year — September's 3.1 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.6Moderate
33.6Moderate
43.5Moderate
53.5Moderate
63.5Moderate
73.4Moderate
83.4Moderate
93.4Moderate
103.3Moderate
113.3Moderate
123.2Moderate
133.2Moderate
143.2Moderate
153.1Moderate
163.1Moderate
173.0Moderate
183.0Moderate
193.0Moderate
202.9Moderate
212.9Moderate
222.8Moderate
232.8Moderate
242.7Moderate
252.7Moderate
262.6Moderate
272.6Moderate
282.5Moderate
292.5Moderate
302.4Moderate
Planning a trip in September

Is September a good time to visit Diepenbeek?

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

5.9
Sightseeing
4th-best month of the year
2.7
Beach & pool
4th-best month of the year

September is a reasonable time to visit Diepenbeek for sightseeing.

What to pack for Diepenbeek in September

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

In September, Diepenbeek sees daytime highs around 19°C and nights near 11°C. Worth packing: rain gear. About 11 days see rain.

rain gear

UV index in Diepenbeek in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Diepenbeek 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

Air quality in Diepenbeek in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Diepenbeek is worst in April — around 18 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Diepenbeek's WHO annual average of 14.3 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1218 µg/m³Dec 1311 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar17Moderate
Apr18Moderate
May16Moderate
Jun15Moderate
Jul14Moderate
Aug15Moderate
Sep14Moderate
Oct13Moderate
Nov12Moderate
Dec11Good
Location & terrain

Where is Diepenbeek?

Diepenbeek sits at 50.9°N, 5.4°E, 50 m above sea level, in Belgium. The nearest listed city is Hasselt, 6.0 km away.

Lanaken

Topography around Diepenbeek

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

Within 3 km, the terrain around Diepenbeek has only modest variations in elevation — a maximum elevation change of 48 m around an average of 45 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 157 m; within 80 km, large variations in elevation — a maximum elevation change of 989 m.

The land around Diepenbeek is covered by grassland (33%) and trees (32%) within 3 km, trees (41%) and grassland (24%) within 16 km, and trees (37%), cropland (27%) and grassland (24%) within 80 km.

3 km
48 m
16 km
157 m
80 km
989 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Hasselt 6.0 km · Bilzen 8.0 km · Genk 9.0 km · Zonhoven 10 km · Houthalen 14 km · Tongeren 15 km · Zolder 15 km · Lanaken 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 Diepenbeek (50.9077°, 5.4188°, elevation 50 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. 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).