Kalisz weather in September

In September, Kalisz sees average daytime highs of 19°C and overnight lows near 10°C, with 51 mm of rain across 9.4 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 22% 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 Kalisz's 6th-clearest and 8th-windiest month. For the whole year in context, see Kalisz's year-round climate.

Daytime high
19°
4th warmest
Overnight low
10°
9th coldest
Rainfall
51 mm
9.4 wet days
Daylight
12 h 24 min
5:30 AM – 5:54 PM
Cloud cover
64%
6th clearest
Wind
13 km/h
8th windiest
Solar energy
3.08 kWh/m²
Travel score
6.0
out of 10

Kalisz is city with powiat rights of Poland.

Air quality
Elevated
PM2.5 20.6 µg/m³ · 2019
Density
1,567/km²
people per km²
Founded
~850 CE

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 Kalisz 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
52111
62111
72111
82011
92011
102011
112011
122010
132010
141910
151910
161910
171910
18199
19199
20189
21189
22189
23189
24189
25179
26178
27178
28178
29178
30168

How September really feels in Kalisz

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.

Kalisz 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 / -3°4010.75.48.10.0
Feb / -2°369.14.69.60.0
Mar / 4610.83.111.51.1
Apr14° / 358.70.613.64.1
May19° / 5811.5015.45.9
Jun22° / 12°6911.7016.36.3
Jul24° / 14°9112.10166.6
Aug24° / 14°6010.3014.46.8
Sep19° / 10°519.4012.46.0
Oct13° / 448.60.210.43.7
Nov / 399.11.78.60.9
Dec / -2°421047.60.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24060
34060
44060
54159
64159
74159
84258
94258
104159
114159
124060
134060
144060
154060
163961
174060
183961
193961
203862
213862
223862
233862
243763
253763
263664
273664
283763
293763
303664

Chance of precipitation in September

Any precipitation

Kalisz gets around 51 mm of rain over 9.4 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 31% and peaks near 37% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
137
237
337
436
536
636
735
835
934
1033
1132
1232
1331
1430
1530
1629
1729
1828
1928
2028
2128
2228
2328
2428
2528
2629
2729
2830
2930
3030

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 85% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
172235
273225
374224
475214
576204
677203
778193
879183
980173
1081163
1182162
1283152
1384142
1485132
1585132
1687121
1788111
1889101
199091
209091
219181
229370
239370
249370
259460
269460
279460
289460
299460
309460

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 13 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
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 5:05 AM to 5:54 AM, and sunset from 6:29 PM to 5:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:056:29
213.35:076:27
313.35:096:25
413.25:106:22
513.15:126:20
613.15:146:18
713.05:156:15
812.95:176:13
912.95:196:11
1012.85:206:08
1112.75:226:06
1212.75:246:03
1312.65:256:01
1412.55:275:59
1512.55:295:56
1612.45:305:54
1712.35:325:51
1812.35:345:49
1912.25:355:46
2012.15:375:44
2112.15:395:42
2212.05:405:39
2311.95:425:37
2411.85:445:34
2511.85:455:32
2611.75:475:30
2711.65:495:27
2811.65:505:25
2911.55:525:22
3011.45:545:20

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.08 kWh/m².

For context, solar energy here swings from a low near 0.6 kWh/m² to a high of 5.44 kWh/m² in June across the year — September's 3.08 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.7Moderate
33.6Moderate
43.6Moderate
53.5Moderate
63.5Moderate
73.5Moderate
83.4Moderate
93.4Moderate
103.3Moderate
113.3Moderate
123.2Moderate
133.2Moderate
143.1Moderate
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
302.5Moderate
Planning a trip in September

Is September a good time to visit Kalisz?

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

6.0
Sightseeing
4th-best month of the year
2.7
Beach & pool
4th-best month of the year

September is a reasonable time to visit Kalisz for sightseeing.

What to pack for Kalisz in September

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

In September, Kalisz sees daytime highs around 19°C and nights near 10°C. Worth packing: rain gear. About 9 days see rain.

rain gear

UV index in Kalisz 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 Kalisz peaks around June 19 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 19 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 19UV 7Dec 19UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May5High
Jun7High
Jul6High
Aug6High
Sep4Moderate
Oct2Low
Nov1Low
Dec1Low

Air quality in Kalisz 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 Kalisz is worst in June — around 26 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 13 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Kalisz's WHO annual average of 20.6 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 1626 µg/m³Dec 1514 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb18Moderate
Mar24Moderate
Apr25Moderate
May24Moderate
Jun26Moderate
Jul24Moderate
Aug23Moderate
Sep20Moderate
Oct17Moderate
Nov16Moderate
Dec13Moderate
Location & terrain

Where is Kalisz?

Kalisz sits at 51.8°N, 18.1°E, 109 m above sea level, in Poland. The nearest listed city is Ostrów Wielkopolski, 23 km away.

TurekKrotoszynJarocinSieradzKoninZduńska Wola

Topography around Kalisz

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

Within 3 km, the terrain around Kalisz has only modest variations in elevation — a maximum elevation change of 47 m around an average of 122 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 94 m; within 80 km, significant variations in elevation — a maximum elevation change of 260 m.

The land around Kalisz is covered by artificial surfaces (36%), trees (26%) and cropland (25%) within 3 km, cropland (68%) within 16 km, and cropland (55%) and trees (28%) within 80 km.

3 km
47 m
16 km
94 m
80 km
260 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Ostrów Wielkopolski 23 km · Pleszew 26 km · Turek 40 km · Krotoszyn 46 km · Jarocin 47 km · Sieradz 48 km · Konin 53 km · Zduńska Wola 61 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 Kalisz (51.7611°, 18.091°, elevation 109 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).