Tarnów weather in September

In September, Tarnów sees average daytime highs of 19°C and overnight lows near 10°C, with 73 mm of rain across 11.1 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 17°C by the end. The sky is clear or mostly clear about 27% 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 Tarnów's 4th-clearest and 8th-windiest month. For the whole year in context, see Tarnów's year-round climate.

Daytime high
19°
4th warmest
Overnight low
10°
9th coldest
Rainfall
73 mm
11.1 wet days
Daylight
12 h 24 min
5:19 AM – 5:41 PM
Cloud cover
62%
4th clearest
Wind
11 km/h
8th windiest
Solar energy
3.16 kWh/m²
Travel score
5.9
out of 10

Tarnów is City with powiat rights of Poland.

Air quality
Elevated
PM2.5 21.4 µg/m³ · 2019
Density
1,627/km²
people per km²
Founded
1330

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 22°C in the first days to 17°C by the end.

A typical September day in Tarnów reaches about 19°C in the afternoon and slips back to 10°C overnight — a 10°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
32212
42112
52111
62111
72111
82111
92111
102011
112011
122010
132010
142010
151910
161910
171910
18199
19199
20199
21189
22189
23189
24189
25189
26188
27178
28178
29178
30178

How September really feels in Tarnów

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.

Tarnów weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°4611.17.58.40.0
Feb / -3°4410.579.70.0
Mar / 5011.14.111.51.3
Apr15° / 6011.21.313.54.2
May19° / 8914.1015.15.6
Jun23° / 13°8613016.16.2
Jul25° / 14°10414.4015.76.3
Aug25° / 14°7011.3014.36.7
Sep19° / 10°7311.1012.45.9
Oct14° / 5910.10.410.54.0
Nov / 4810.32.78.81.1
Dec / -2°4410.65.87.90.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% 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 57%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14852
24852
34852
44852
54753
64753
74654
84654
94555
104456
114357
124357
134357
144159
154159
164159
174159
183961
193961
203961
213961
223961
233961
243961
253961
264159
274159
284159
294159
304159

Chance of precipitation in September

Any precipitation

Tarnów gets around 73 mm of rain over 11.1 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 38% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
138
238
338
438
538
638
738
838
938
1038
1138
1237
1337
1436
1536
1636
1735
1835
1935
2035
2135
2235
2335
2435
2535
2635
2735
2835
2935
3035

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 79% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
1632611
2652510
366259
467258
569247
670246
770246
871245
971245
1073234
1173234
1275223
1376213
1477212
1578202
1679192
1780182
1882171
1983161
2084151
2185141
2286131
2387121
2489110
2590100
2690100
2790100
289190
299190
309190

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 4:56 AM to 5:41 AM, and sunset from 6:15 PM to 5:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.34:566:15
213.34:586:13
313.24:596:11
413.15:016:09
513.15:026:06
613.05:046:04
712.95:056:02
812.95:076:00
912.85:095:57
1012.85:105:55
1112.75:125:53
1212.65:135:51
1312.65:155:48
1412.55:165:46
1512.45:185:44
1612.45:195:41
1712.35:215:39
1812.25:225:37
1912.25:245:35
2012.15:265:32
2112.05:275:30
2212.05:295:28
2311.95:305:25
2411.95:325:23
2511.85:335:21
2611.75:355:19
2711.75:365:16
2811.65:385:14
2911.55:405:12
3011.55:415:10

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.16 kWh/m².

For context, solar energy here swings from a low near 0.74 kWh/m² to a high of 5.37 kWh/m² in June across the year — September's 3.16 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.7Moderate
43.7Moderate
53.6Moderate
63.6Moderate
73.5Moderate
83.5Moderate
93.5Moderate
103.4Moderate
113.4Moderate
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
292.6Moderate
302.5Moderate
Planning a trip in September

Is September a good time to visit Tarnów?

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
2.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit Tarnów for sightseeing.

What to pack for Tarnów in September

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

In September, Tarnów 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 Tarnów 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 Tarnów peaks around June 23 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 23UV 7Dec 19UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr5Moderate
May6High
Jun7High
Jul7High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Tarnów 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 Tarnów is worst in June — around 26 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 15 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Tarnów's WHO annual average of 21.4 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 2026 µg/m³Dec 1716 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb19Moderate
Mar24Moderate
Apr25Moderate
May24Moderate
Jun26Moderate
Jul25Moderate
Aug24Moderate
Sep21Moderate
Oct18Moderate
Nov18Moderate
Dec15Moderate
Location & terrain

Where is Tarnów?

Tarnów sits at 50.0°N, 21.0°E, 220 m above sea level, in Poland. The nearest listed city is Brzesko, 28 km away.

BochniaGorliceMielecRopczyceJasłoNowy Sącz

Topography around Tarnów

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

Within 3 km, the terrain around Tarnów has only modest variations in elevation — a maximum elevation change of 170 m around an average of 216 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 348 m; within 80 km, large variations in elevation — a maximum elevation change of 1,149 m.

The land around Tarnów is covered by trees (40%) and artificial surfaces (36%) within 3 km, trees (50%), cropland (23%) and grassland (20%) within 16 km, and trees (50%) and cropland (28%) within 80 km.

3 km
170 m
16 km
348 m
80 km
1,149 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Brzesko 28 km · Dębica 31 km · Bochnia 40 km · Gorlice 42 km · Mielec 44 km · Ropczyce 45 km · Jasło 46 km · Nowy Sącz 48 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 Tarnów (50.0138°, 20.987°, elevation 220 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).