Nijlen weather in September

In September, Nijlen sees average daytime highs of 19°C and overnight lows near 11°C, with 59 mm of rain across 11 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 17°C by the end. The sky is clear or mostly clear about 19% 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 24 min by month's end. Set against the rest of the year, September is Nijlen's 3rd-clearest and 9th-windiest month. For the whole year in context, see Nijlen's year-round climate.

Daytime high
19°
4th warmest
Overnight low
11°
9th coldest
Rainfall
59 mm
11 wet days
Daylight
12 h 24 min
6:24 AM – 6:47 PM
Cloud cover
66%
3rd clearest
Wind
12 km/h
9th windiest
Solar energy
3.06 kWh/m²
Travel score
5.8
out of 10

Nijlen is town in Nijlen municipality, Belgium.

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 17°C by the end.

A typical September day in Nijlen 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 24°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12113
22113
32113
42012
52012
62012
72012
82012
92012
102012
112012
122012
132012
141912
151911
161911
171911
181911
191911
201911
211911
221811
231811
241811
251811
261811
271810
281810
291710
301710

How September really feels in Nijlen

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.

Nijlen weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6512.11.18.20.4
Feb / 5911.41.59.60.7
Mar10° / 5611.30.811.52.3
Apr14° / 4811013.54.1
May18° / 6312.6015.35.4
Jun21° / 12°6811.6016.26.0
Jul23° / 14°7512.9015.96.3
Aug23° / 14°7612.5014.46.3
Sep19° / 11°5911012.45.8
Oct15° / 6111.4010.44.1
Nov10° / 6512.40.48.71.9
Dec / 75131.37.70.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13466
23466
33466
43565
53565
63565
73664
83664
93664
103763
113763
123664
133763
143763
153664
163763
173763
183763
193763
203763
213763
223664
233664
243664
253565
263367
273367
283169
293169
302971

Chance of precipitation in September

Any precipitation

Nijlen gets around 59 mm of rain over 11 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 38% and peaks near 42% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
136
235
335
435
535
635
735
836
936
1036
1137
1237
1337
1437
1537
1638
1738
1838
1938
2038
2138
2238
2339
2439
2539
2640
2741
2841
2942
3042

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 70% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15632111
25731111
35930101
46029101
56029101
66128101
76327100
8652690
9652690
10662590
11672490
12692380
13702280
14712270
15732160
16732160
17752050
18752050
19762040
20772030
21772030
22772120
23772120
24772120
25782110
26782110
27782110
28782110
29782110
30782110

Wind in September

Winds average 12 km/h in September.

Across September, 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.

051015151015202530
Wind speed (km/h)Feels
112calm
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
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
2212light breeze
2312light breeze
2412light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

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

Days shrink by about 120 minutes over September. Sunrise moves from 6:00 AM to 6:47 AM, and sunset from 7:22 PM to 6:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.46:007:22
213.36:017:20
313.26:037:18
413.26:057:15
513.16:067:13
613.06:087:11
713.06:107:08
812.96:117:06
912.86:137:04
1012.86:147:01
1112.76:166:59
1212.76:186:57
1312.66:196:54
1412.56:216:52
1512.56:226:50
1612.46:246:47
1712.36:266:45
1812.36:276:42
1912.26:296:40
2012.16:316:38
2112.16:326:35
2212.06:346:33
2311.96:366:31
2411.86:376:28
2511.86:396:26
2611.76:416:23
2711.66:426:21
2811.66:446:19
2911.56:456:16
3011.46:476:14

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.06 kWh/m².

For context, solar energy here swings from a low near 0.61 kWh/m² to a high of 5.23 kWh/m² in June across the year — September's 3.06 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.6Moderate
33.5Moderate
43.5Moderate
53.5Moderate
63.4Moderate
73.4Moderate
83.4Moderate
93.3Moderate
103.3Moderate
113.2Moderate
123.2Moderate
133.2Moderate
143.1Moderate
153.1Moderate
163.0Moderate
173.0Moderate
183.0Moderate
192.9Moderate
202.9Moderate
212.8Moderate
222.8Moderate
232.7Moderate
242.7Moderate
252.6Moderate
262.6Moderate
272.5Moderate
282.5Moderate
292.4Moderate
302.4Moderate
Planning a trip in September

Is September a good time to visit Nijlen?

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

5.8
Sightseeing
4th-best month of the year
2.6
Beach & pool
4th-best month of the year

September is a reasonable time to visit Nijlen for sightseeing.

What to pack for Nijlen in September

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

In September, Nijlen 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 Nijlen 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 Nijlen peaks around July 14 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 14UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Nijlen 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 Nijlen is worst in April — around 18 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
Jan13Moderate
Feb13Moderate
Mar17Moderate
Apr18Moderate
May16Moderate
Jun15Moderate
Jul14Moderate
Aug15Moderate
Sep15Moderate
Oct13Moderate
Nov12Moderate
Dec11Good
Location & terrain

Where is Nijlen?

Nijlen sits at 51.2°N, 4.7°E, 7 m above sea level, in Belgium. The nearest listed city is Lier, 8.0 km away.

Topography around Nijlen

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

Within 3 km, the terrain around Nijlen has only modest variations in elevation — a maximum elevation change of 27 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 63 m; within 80 km, significant variations in elevation — a maximum elevation change of 334 m.

The land around Nijlen is covered by trees (38%) and grassland (33%) within 3 km, trees (39%) and grassland (31%) within 16 km, and cropland (32%), trees (25%) and grassland (25%) within 80 km.

3 km
27 m
16 km
63 m
80 km
334 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Lier 8.0 km · Ranst 8.0 km · Heist-op-den-Berg 10 km · Schilde 11 km · Herentals 11 km · Putte 12 km · Duffel 13 km · Lille 14 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 Nijlen (51.161°, 4.6701°, elevation 7 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).