Gliwice weather in September

In September, Gliwice sees average daytime highs of 19°C and overnight lows near 10°C, with 73 mm of rain across 11 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 5th-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 24% 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 Gliwice's 3rd-clearest and 8th-windiest month. For the whole year in context, see Gliwice's year-round climate.

Daytime high
19°
4th warmest
Overnight low
10°
9th coldest
Rainfall
73 mm
11 wet days
Daylight
12 h 24 min
5:28 AM – 5:51 PM
Cloud cover
62%
3rd clearest
Wind
12 km/h
8th windiest
Solar energy
3.12 kWh/m²
Travel score
5.9
out of 10

Gliwice is city with powiat rights of Poland in Upper Silesia.

Air quality
High
PM2.5 26.4 µg/m³ · 2019
Density
1,485/km²
people per km²
Founded
1250

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 Gliwice reaches about 19°C in the afternoon and slips back to 10°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 25°C. Set against its neighbours, September runs about 5°C cooler than August and about 6°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12212
22212
32112
42112
52112
62111
72111
82011
92011
102011
112011
122011
132010
141910
151910
161910
171910
181910
191910
20189
21189
22189
23189
24189
25189
26179
27179
28178
29178
30178

How September really feels in Gliwice

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.

Gliwice weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°4611.16.78.30.0
Feb / -3°4210.169.70.0
Mar / 52123.711.51.3
Apr14° / 5010.41.113.54.2
May19° / 7813.9015.25.5
Jun22° / 12°8413.4016.16.0
Jul24° / 14°10214015.76.3
Aug24° / 14°7411.6014.36.6
Sep19° / 10°7311012.45.9
Oct14° / 5510.20.410.53.8
Nov / 5010.22.68.81.1
Dec / -2°4510.84.87.90.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% 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 58%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14555
24555
34555
44555
54555
64555
74456
84456
94357
104357
114357
124357
134258
144258
154159
164159
174159
184159
194060
204060
213961
223961
234060
244060
254060
264060
274060
283961
293862
303862

Chance of precipitation in September

Any precipitation

Gliwice gets around 73 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 36% and peaks near 39% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
139
239
339
439
539
639
739
839
939
1038
1138
1237
1337
1436
1536
1635
1735
1835
1935
2035
2134
2234
2334
2434
2534
2634
2734
2834
2934
3034

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 80% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
162308
264297
365287
466286
568275
669265
770264
871254
972244
1074233
1175223
1276213
1378202
1479192
1580182
1681172
1782162
1884151
1985141
2086131
2187121
2288111
2390100
2490100
259190
269190
279280
289280
299280
309370

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
212calm
312calm
412calm
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
2512light breeze
2612light breeze
2713light breeze
2813light breeze
2913light breeze
3013light 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 5:05 AM to 5:51 AM, and sunset from 6:25 PM to 5:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:056:25
213.35:076:23
313.25:086:21
413.15:106:18
513.15:116:16
613.05:136:14
713.05:146:11
812.95:166:09
912.85:186:07
1012.85:196:05
1112.75:216:02
1212.65:226:00
1312.65:245:58
1412.55:255:55
1512.45:275:53
1612.45:285:51
1712.35:305:48
1812.25:325:46
1912.25:335:44
2012.15:355:42
2112.05:365:39
2212.05:385:37
2311.95:395:35
2411.95:415:32
2511.85:435:30
2611.75:445:28
2711.75:465:25
2811.65:475:23
2911.55:495:21
3011.55:515:19

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.12 kWh/m².

For context, solar energy here swings from a low near 0.73 kWh/m² to a high of 5.33 kWh/m² in June across the year — September's 3.12 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.7Moderate
33.7Moderate
43.6Moderate
53.6Moderate
63.5Moderate
73.5Moderate
83.5Moderate
93.4Moderate
103.4Moderate
113.3Moderate
123.3Moderate
133.3Moderate
143.2Moderate
153.2Moderate
163.1Moderate
173.1Moderate
183.0Moderate
193.0Moderate
203.0Moderate
212.9Moderate
222.9Moderate
232.8Moderate
242.8Moderate
252.7Moderate
262.7Moderate
272.6Moderate
282.6Moderate
292.5Moderate
302.5Moderate
Planning a trip in September

Is September a good time to visit Gliwice?

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 Gliwice for sightseeing.

What to pack for Gliwice in September

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

In September, Gliwice sees daytime highs around 19°C and nights near 10°C. Worth packing: rain gear. About 11 days see rain.

rain gear

UV index in Gliwice 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 Gliwice peaks around June 20 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 18 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 20UV 7Dec 18UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr5Moderate
May6High
Jun7High
Jul7High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Gliwice 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 Gliwice is worst in June — around 30 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Gliwice's WHO annual average of 26.4 µg/m³.

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 1629 µg/m³Dec 1622 µg/m³
PM2.5 (µg/m³)Level
Jan24Moderate
Feb24Moderate
Mar29Moderate
Apr28Moderate
May28Moderate
Jun30Moderate
Jul28Moderate
Aug29Moderate
Sep27Moderate
Oct24Moderate
Nov24Moderate
Dec21Moderate
Location & terrain

Where is Gliwice?

Gliwice sits at 50.3°N, 18.7°E, 200 m above sea level, in Poland. The nearest listed city is Zabrze, 8.0 km away.

Topography around Gliwice

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

Within 3 km, the terrain around Gliwice has only modest variations in elevation — a maximum elevation change of 64 m around an average of 235 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 151 m; within 80 km, large variations in elevation — a maximum elevation change of 1,123 m.

The land around Gliwice is covered by trees (45%) and artificial surfaces (41%) within 3 km, trees (44%) and cropland (29%) within 16 km, and trees (47%) and cropland (33%) within 80 km.

3 km
64 m
16 km
151 m
80 km
1,123 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Zabrze 8.0 km · Knurów 9.0 km · Pyskowice 12 km · Ruda Śląska 13 km · Czerwionka-Leszczyny 16 km · Świętochłowice 17 km · Orzesze 17 km · Bytom 19 km

Poland travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 52% of US
price level, 2025
GDP per capita
$28,420
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
0.8
per 100k, 2023
Road deaths
9.4
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 600
Religion
Roman Catholic 71%refused to answer 21%no religion 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 Gliwice (50.2976°, 18.6766°, elevation 200 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).