Fléron weather in September

In September, Fléron sees average daytime highs of 17°C and overnight lows near 10°C, with 74 mm of rain across 12 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 19°C in the first days to 16°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 18 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Fléron's 3rd-clearest and 8th-windiest month. For the whole year in context, see Fléron's year-round climate.

Daytime high
17°
4th warmest
Overnight low
10°
9th coldest
Rainfall
74 mm
12 wet days
Daylight
12 h 24 min
6:20 AM – 6:43 PM
Cloud cover
66%
3rd clearest
Wind
13 km/h
8th windiest
Solar energy
3.11 kWh/m²
Travel score
5.2
out of 10

Fléron is town in Fléron 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 19°C in the first days to 16°C by the end.

A typical September day in Fléron reaches about 17°C in the afternoon and slips back to 10°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 23°C. Set against its neighbours, September runs about 4°C cooler than August and about 4°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11911
21911
31911
41911
51911
61911
71811
81811
91811
101810
111810
121810
131810
141810
151810
161710
171710
181710
191710
201710
211710
22179
23179
24169
25169
26169
27169
28169
29169
30159

How September really feels in Fléron

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.

Fléron 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 / 9714.64.28.30.0
Feb / -0°8313.15.59.70.1
Mar / 8514.73.411.51.5
Apr13° / 6412.70.713.53.2
May17° / 7313.9015.24.7
Jun19° / 11°8514016.25.4
Jul21° / 13°8914.5015.85.9
Aug21° / 13°8713.3014.35.9
Sep17° / 10°7412012.45.2
Oct13° / 7613.2010.43.3
Nov / 8314.31.68.71.1
Dec / 10815.94.97.80.0

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 14% of September, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13466
23466
33466
43466
53466
63565
73466
83466
93367
103466
113466
123466
133466
143466
153466
163565
173565
183466
193466
203367
213466
223466
233466
243367
253268
263169
273070
282971
292971
302773

Chance of precipitation in September

Any precipitation

Fléron gets around 74 mm of rain over 12 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 41% and peaks near 47% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
141
241
341
440
540
640
740
840
940
1040
1139
1239
1339
1439
1539
1639
1739
1839
1939
2040
2140
2241
2341
2442
2543
2644
2745
2845
2946
3047

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 83% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1702451
2712450
3732340
4732340
5752230
6752230
7762130
8762130
9772030
10791920
11791920
12801820
13811720
14821620
15831520
16841420
17851320
18871210
19871210
20881110
21891010
22891010
23891010
24891010
2591900
2691900
2791900
2891900
2991900
3091900

Wind in September

Winds average 13 km/h in September.

Across September, 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.

05101520151015202530
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
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 18 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 108 minutes over September. Sunrise moves from 5:57 AM to 6:43 AM, and sunset from 7:17 PM to 6:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:577:17
213.35:587:15
313.26:007:13
413.26:017:11
513.16:037:08
613.06:047:06
713.06:067:04
812.96:087:01
912.86:096:59
1012.86:116:57
1112.76:126:55
1212.66:146:52
1312.66:166:50
1412.56:176:48
1512.46:196:45
1612.46:206:43
1712.36:226:41
1812.26:236:38
1912.26:256:36
2012.16:276:34
2112.06:286:31
2212.06:306:29
2311.96:316:27
2411.96:336:24
2511.86:356:22
2611.76:366:20
2711.76:386:17
2811.66:406:15
2911.56:416:13
3011.56:436:10

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.11 kWh/m².

For context, solar energy here swings from a low near 0.64 kWh/m² to a high of 5.27 kWh/m² in June across the year — September's 3.11 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.6Moderate
33.6Moderate
43.6Moderate
53.5Moderate
63.5Moderate
73.5Moderate
83.4Moderate
93.4Moderate
103.3Moderate
113.3Moderate
123.3Moderate
133.2Moderate
143.2Moderate
153.1Moderate
163.1Moderate
173.1Moderate
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 Fléron?

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

5.2
Sightseeing
4th-best month of the year
1.5
Beach & pool
4th-best month of the year

September is a reasonable time to visit Fléron for sightseeing.

What to pack for Fléron in September

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

In September, Fléron sees daytime highs around 17°C and nights near 10°C. Worth packing: rain gear. About 12 days see rain.

rain gear

UV index in Fléron 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 Fléron 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 Fléron 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 Fléron is worst in April — around 18 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (November, 11 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1218 µg/m³Nov 2211 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb13Moderate
Mar17Moderate
Apr18Moderate
May15Moderate
Jun14Moderate
Jul13Moderate
Aug14Moderate
Sep13Moderate
Oct12Good
Nov11Good
Dec11Good
Location & terrain

Where is Fléron?

Fléron sits at 50.6°N, 5.7°E, 258 m above sea level, in Belgium. The nearest listed city is Soumagne, 5.0 km away.

Topography around Fléron

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

Within 3 km, the terrain around Fléron has only modest variations in elevation — a maximum elevation change of 234 m around an average of 215 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 362 m; within 80 km, large variations in elevation — a maximum elevation change of 1,000 m.

The land around Fléron is covered by trees (46%) and grassland (33%) within 3 km, trees (39%) and grassland (33%) within 16 km, and trees (41%), grassland (26%) and cropland (26%) within 80 km.

3 km
234 m
16 km
362 m
80 km
1,000 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Soumagne 5.0 km · Chaudfontaine 5.0 km · Grivegnée 5.0 km · Herstal 7.0 km · Liège 8.0 km · Herve 8.0 km · Saint-Nicolas 11 km · Oupeye 11 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 Fléron (50.6152°, 5.6806°, elevation 258 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).