Keszthely weather in September

In September, Keszthely sees average daytime highs of 21°C and overnight lows near 13°C, with 72 mm of rain across 8.8 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 19°C by the end. The sky is clear or mostly clear about 36% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 12 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Keszthely's 3rd-clearest and 9th-windiest month. For the whole year in context, see Keszthely's year-round climate.

Daytime high
21°
4th warmest
Overnight low
13°
9th coldest
Rainfall
72 mm
8.8 wet days
Daylight
12 h 18 min
5:35 AM – 5:55 PM
Cloud cover
55%
3rd clearest
Wind
10 km/h
9th windiest
Solar energy
3.69 kWh/m²
Travel score
6.8
out of 10

Keszthely is city in Hungary.

Founded
1247

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 24°C in the first days to 19°C by the end.

A typical September day in Keszthely reaches about 21°C in the afternoon and slips back to 13°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 27°C. Set against its neighbours, September runs about 5°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12415
22415
32414
42314
52314
62314
72314
82314
92314
102213
112213
122213
132213
142213
152213
162113
172112
182112
192112
202112
212012
222012
232012
242011
252011
262011
272011
281911
291911
301911

How September really feels in Keszthely

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.

Keszthely weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°367.138.80.0
Feb / -1°427.83.4100.4
Mar11° / 458.51.511.62.8
Apr17° / 478.70.313.35.3
May21° / 12°7011.2014.86.4
Jun25° / 16°7410.7015.66.8
Jul27° / 17°7310.4015.36.6
Aug27° / 17°659.10146.9
Sep21° / 13°728.8012.46.8
Oct16° / 588.30.110.65.1
Nov / 608.81.39.21.9
Dec / -1°53938.40.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% 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 46%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25842
35743
45644
55545
65545
75545
85446
95446
105446
115446
125347
135347
145347
155347
165248
175248
185248
195248
205347
215347
225347
235347
245347
255347
265347
275248
285248
295248
305149

Chance of precipitation in September

Any precipitation

Keszthely gets around 72 mm of rain over 8.8 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 30% and peaks near 32% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
131
231
331
431
531
632
732
832
932
1032
1132
1232
1332
1431
1531
1631
1730
1830
1929
2029
2128
2228
2327
2426
2526
2626
2726
2826
2926
3026

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 59% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14036232
24136212
34336201
44436191
54536181
64636181
74636170
84736160
94836160
104936150
115135140
125234140
135433130
145632120
155731120
165930110
176129100
18632890
19652690
20672580
21692470
22712360
23722260
24732250
25752140
26752140
27762130
28772120
29772120
30772120

Wind in September

Winds average 10 km/h in September.

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

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 12 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 102 minutes over September. Sunrise moves from 5:15 AM to 5:54 AM, and sunset from 6:26 PM to 5:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.25:156:26
213.15:176:24
313.15:186:22
413.05:196:20
513.05:216:18
612.95:226:16
712.85:236:14
812.85:256:12
912.75:266:10
1012.75:276:08
1112.65:296:06
1212.65:306:04
1312.55:316:01
1412.45:335:59
1512.45:345:57
1612.35:355:55
1712.35:375:53
1812.25:385:51
1912.25:405:49
2012.15:415:47
2112.05:425:45
2212.05:445:43
2311.95:455:41
2411.95:465:39
2511.85:485:36
2611.85:495:34
2711.75:505:32
2811.65:525:30
2911.65:535:28
3011.55:545:26

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.69 kWh/m².

For context, solar energy here swings from a low near 1.01 kWh/m² to a high of 5.97 kWh/m² in June across the year — September's 3.69 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.3Bright
34.3Bright
44.2Bright
54.2Bright
64.1Bright
74.1Bright
84.0Bright
94.0Bright
104.0Moderate
113.9Moderate
123.9Moderate
133.8Moderate
143.8Moderate
153.7Moderate
163.7Moderate
173.6Moderate
183.6Moderate
193.5Moderate
203.5Moderate
213.5Moderate
223.4Moderate
233.4Moderate
243.3Moderate
253.3Moderate
263.3Moderate
273.2Moderate
283.2Moderate
293.1Moderate
303.1Moderate
Planning a trip in September

Is September a good time to visit Keszthely?

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

6.8
Sightseeing
2nd-best month of the year
4.4
Beach & pool
4th-best month of the year

September is a reasonable time to visit Keszthely for sightseeing.

What to pack for Keszthely in September

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

In September, Keszthely sees daytime highs around 21°C and nights near 13°C. Worth packing: rain gear. About 9 days see rain.

rain gear

UV index in Keszthely in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Keszthely peaks around July 16 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highModerateLowJul 16UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr6High
May6High
Jun7Very high
Jul8Very high
Aug7Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Keszthely 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 Keszthely is worst in April — around 15 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1315 µg/m³Dec 1310 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb12Good
Mar15Moderate
Apr15Moderate
May14Moderate
Jun14Moderate
Jul13Moderate
Aug13Moderate
Sep10Good
Oct10Good
Nov10Good
Dec10Good
Location & terrain

Where is Keszthely?

Keszthely sits at 46.8°N, 17.2°E, 128 m above sea level, in Hungary. The nearest listed city is Tapolca, 20 km away.

ZalaegerszegNagykanizsaAjkaSárvárKaposvárVeszprémSiófok

Topography around Keszthely

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

Within 3 km, the terrain around Keszthely has only modest variations in elevation — a maximum elevation change of 96 m around an average of 125 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 361 m; within 80 km, significant variations in elevation — a maximum elevation change of 589 m.

The land around Keszthely is covered by cropland (23%), grassland (22%) and trees (21%) within 3 km, trees (38%), cropland (21%) and grassland (20%) within 16 km, and trees (41%) and cropland (41%) within 80 km.

3 km
96 m
16 km
361 m
80 km
589 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Tapolca 20 km · Zalaegerszeg 31 km · Nagykanizsa 40 km · Ajka 44 km · Sárvár 59 km · Kaposvár 62 km · Veszprém 62 km · Siófok 64 km

Hungary travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 52% of US
price level, 2025
GDP per capita
$25,907
2025
Happiness
5.9 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
7.7
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 590
Religion
no answer 40%Catholic 30%none 16%Calvinist 10%

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 Keszthely (46.7681°, 17.2432°, elevation 128 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).