Alytus weather in September

In September, Alytus sees average daytime highs of 17°C and overnight lows near 9°C, with 52 mm of rain across 9.5 wet days and about 12.5 hours of daylight. It is the 5th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 19°C in the first days to 15°C by the end. The sky is clear or mostly clear about 20% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 30 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Alytus's 6th-clearest and 7th-windiest month. For the whole year in context, see Alytus's year-round climate.

Daytime high
17°
5th warmest
Overnight low
9th coldest
Rainfall
52 mm
9.5 wet days
Daylight
12 h 24 min
6:05 AM – 6:31 PM
Cloud cover
67%
6th clearest
Wind
12 km/h
7th windiest
Solar energy
2.79 kWh/m²
Travel score
5.3
out of 10

Alytus is city in Lithuania.

Density
1,025/km²
people per km²
Founded
1377

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 15°C by the end.

A typical September day in Alytus reaches about 17°C in the afternoon and slips back to 9°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 22°C. Set against its neighbours, September runs about 5°C cooler than August and about 7°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12011
22011
32011
41911
51911
61910
71910
81910
91810
101810
111810
121810
13189
14179
15179
16179
17179
18179
19179
20168
21168
22168
23168
24168
25158
26158
27157
28157
29157
30147

How September really feels in Alytus

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.

Alytus weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -5°431177.70.0
Feb / -5°3810.17.49.30.0
Mar / -2°4010.44.811.50.3
Apr12° / 459.91.213.73.2
May18° / 5811.70.115.75.5
Jun21° / 11°7012.2016.96.0
Jul23° / 14°8713016.46.4
Aug22° / 13°7512.1014.76.4
Sep17° / 529.5012.55.3
Oct11° / 5410.60.510.22.4
Nov / 4310.438.20.2
Dec / -3°4610.36.37.10.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% 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 64%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13862
23862
33763
43763
53763
63763
73763
83565
93565
103565
113664
123664
133664
143664
153664
163763
173862
183862
193763
203763
213763
223763
233664
243664
253565
263565
273565
283565
293367
303367

Chance of precipitation in September

Any precipitation

Alytus gets around 52 mm of rain over 9.5 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 32% and peaks near 38% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
138
238
337
437
536
636
735
835
935
1034
1134
1233
1333
1432
1532
1631
1731
1830
1930
2029
2129
2229
2329
2429
2529
2629
2730
2830
2931
3031

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 86% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
171263
273252
374242
475232
576222
677212
778202
879192
980182
1080182
1181172
1282162
1383152
1484142
1586131
1687121
1788111
1889101
199091
209181
219271
229460
239460
249550
259550
269640
279640
289730
299730
309730

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.

05101520151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light 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 30 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 126 minutes over September. Sunrise moves from 5:37 AM to 6:32 AM, and sunset from 7:10 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:377:10
213.55:397:07
313.45:417:05
413.35:437:02
513.35:457:00
613.25:466:57
713.15:486:55
813.05:506:52
913.05:526:49
1012.95:546:47
1112.85:566:44
1212.75:586:42
1312.76:006:39
1412.66:016:36
1512.56:036:34
1612.46:056:31
1712.46:076:28
1812.36:096:26
1912.26:116:23
2012.16:136:21
2112.16:156:18
2212.06:176:15
2311.96:186:13
2411.86:206:10
2511.86:226:08
2611.76:246:05
2711.66:266:02
2811.56:286:00
2911.56:305:57
3011.46:325:55

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.79 kWh/m².

For context, solar energy here swings from a low near 0.39 kWh/m² to a high of 5.47 kWh/m² in June across the year — September's 2.79 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.5Moderate
23.4Moderate
33.4Moderate
43.3Moderate
53.3Moderate
63.2Moderate
73.2Moderate
83.1Moderate
93.1Moderate
103.0Moderate
113.0Moderate
123.0Moderate
132.9Moderate
142.9Moderate
152.8Moderate
162.8Moderate
172.7Moderate
182.7Moderate
192.6Moderate
202.6Moderate
212.5Moderate
222.5Moderate
232.5Moderate
242.4Moderate
252.4Moderate
262.3Moderate
272.3Moderate
282.2Moderate
292.2Moderate
302.1Moderate
Planning a trip in September

Is September a good time to visit Alytus?

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

5.3
Sightseeing
5th-best month of the year
1.4
Beach & pool
5th-best month of the year

September is a reasonable time to visit Alytus for sightseeing.

What to pack for Alytus in September

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

In September, Alytus sees daytime highs around 17°C and nights near 9°C. Worth packing: rain gear. About 10 days see rain.

rain gear

UV index in Alytus in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Alytus peaks around June 21 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 20 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 21UV 6Dec 20UV 0
UV index (midday)Level
Jan1Low
Feb1Low
Mar2Moderate
Apr4Moderate
May5Moderate
Jun6High
Jul6High
Aug6High
Sep3Moderate
Oct2Low
Nov1Low
Dec0Low

Air quality in Alytus 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 Alytus is worst in June — around 15 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 2215 µg/m³Dec 178 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar14Moderate
Apr15Moderate
May14Moderate
Jun15Moderate
Jul15Moderate
Aug15Moderate
Sep13Moderate
Oct10Good
Nov9Good
Dec8Good
Location & terrain

Where is Alytus?

Alytus sits at 54.4°N, 24.0°E, 104 m above sea level, in Lithuania. The nearest listed city is Marijampolė, 48 km away.

MarijampolėAleksotasKaunasDainava (Kaunas)EiguliaiŠilainiaiTrakaiJonava

Topography around Alytus

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

Within 3 km, the terrain around Alytus has only modest variations in elevation — a maximum elevation change of 112 m around an average of 104 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 173 m; within 80 km, significant variations in elevation — a maximum elevation change of 285 m.

The land around Alytus is covered by trees (53%) and artificial surfaces (24%) within 3 km, trees (39%), grassland (30%) and cropland (27%) within 16 km, and trees (50%) and cropland (29%) within 80 km.

3 km
112 m
16 km
173 m
80 km
285 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Marijampolė 48 km · Aleksotas 55 km · Kaunas 57 km · Dainava (Kaunas) 58 km · Eiguliai 60 km · Šilainiai 60 km · Trakai 64 km · Jonava 78 km

Lithuania travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 58% of US
price level, 2025
GDP per capita
$32,959
2025
Happiness
6.7 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
2.6
per 100k, 2023
Road deaths
8.1
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 543
Religion
Roman Catholic 74%none 6%Russian Orthodox 4%other 1%

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 Alytus (54.3957°, 24.0389°, elevation 104 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).