Illescas weather in September

In September, Illescas sees average daytime highs of 28°C and overnight lows near 15°C, with 24 mm of rain across 3.9 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 31°C in the first days to 25°C by the end. The sky is clear or mostly clear about 57% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Illescas's 4th-clearest and 12th-windiest month. For the whole year in context, see Illescas's year-round climate.

Daytime high
28°
4th warmest
Overnight low
15°
9th coldest
Rainfall
24 mm
3.9 wet days
Daylight
12 h 18 min
7:02 AM – 7:18 PM
Cloud cover
37%
4th clearest
Wind
9 km/h
12th windiest
Solar energy
5.35 kWh/m²
Travel score
7.2
out of 10

Illescas is capital of Illescas Municipality, Spain.

Air quality
Moderate
PM10 30.8 µg/m³ · 2019

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 31°C in the first days to 25°C by the end.

A typical September day in Illescas reaches about 28°C in the afternoon and slips back to 15°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 32°C. Set against its neighbours, September runs about 5°C cooler than August and about 7°C warmer than October.

10°20°30°40°151015202530
Avg high (°C)Avg low (°C)
13118
23117
33117
43017
53017
63017
73017
83017
92916
102916
112916
122916
132816
142816
152815
162815
172715
182715
192715
202714
212614
222614
232614
242614
252514
262514
272513
282513
292513
302513

How September really feels in Illescas

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.

Illescas weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan11° / 387.29.52.7
Feb13° / 346.510.43.9
Mar17° / 417.511.75.7
Apr19° / 487.8136.5
May24° / 12°45814.27.3
Jun30° / 17°204.114.86.2
Jul34° / 20°91.514.64.1
Aug33° / 19°112.513.64.4
Sep28° / 15°243.912.37.2
Oct21° / 11°587.510.97.0
Nov15° / 527.89.84.6
Dec11° / 497.79.22.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 57% 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 26%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18515
28317
38317
48317
58218
68218
78119
88020
97921
107921
117723
127624
137624
147426
157327
167228
177129
187030
196931
206832
216733
226733
236733
246634
256634
266733
276733
286634
296733
306733

Chance of precipitation in September

Any precipitation

Illescas gets around 24 mm of rain over 3.9 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 13% and peaks near 17% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
19
29
38
48
58
68
79
89
99
1010
1111
1211
1312
1413
1513
1614
1715
1816
1916
2017
2117
2217
2317
2417
2517
2617
2716
2816
2916
3016

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 83% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
185123
285123
385123
485123
585123
685123
785123
886122
986122
1086122
1185132
1285132
1384142
1483152
1583152
1682162
1782162
1882171
1982171
2081181
2181181
2281181
2381181
2481181
2581181
2681181
2781181
2882171
2983161
3083161

Wind in September

Winds average 9 km/h in September, the calmest month.

Across September, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 6:47 AM to 7:16 AM, and sunset from 7:43 PM to 6:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:477:43
212.96:487:41
312.86:497:40
412.86:507:38
512.86:517:36
612.76:527:35
712.76:537:33
812.66:547:31
912.66:557:30
1012.56:567:28
1112.56:577:26
1212.46:587:24
1312.46:597:23
1412.47:007:21
1512.37:017:19
1612.37:027:18
1712.27:037:16
1812.27:047:14
1912.17:057:12
2012.17:067:11
2112.07:077:09
2212.07:087:07
2311.97:097:05
2411.97:107:04
2511.97:117:02
2611.87:127:00
2711.87:136:59
2811.77:146:57
2911.77:156:55
3011.67:166:53

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.35 kWh/m².

For context, solar energy here swings from a low near 1.9 kWh/m² to a high of 7.87 kWh/m² in July across the year — September's 5.35 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.1Intense
46.1Intense
56.0Intense
66.0Bright
75.9Bright
85.8Bright
95.8Bright
105.7Bright
115.6Bright
125.6Bright
135.5Bright
145.5Bright
155.4Bright
165.3Bright
175.3Bright
185.2Bright
195.1Bright
205.1Bright
215.0Bright
224.9Bright
234.9Bright
244.8Bright
254.8Bright
264.7Bright
274.7Bright
284.6Bright
294.6Bright
304.5Bright
Planning a trip in September

Is September a good time to visit Illescas?

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

7.2
Sightseeing
2nd-best month of the year
7.8
Beach & pool
2nd-best month of the year

September is one of the better times to visit Illescas for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Illescas in September

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

In September, Illescas sees daytime highs around 28°C and nights near 15°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.

light clothessun protection

UV index in Illescas in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Illescas peaks around July 15 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 15UV 10Dec 19UV 2
UV index (midday)Level
Jan2Moderate
Feb2Moderate
Mar6High
Apr7High
May7High
Jun9Very high
Jul10Extreme
Aug9Very high
Sep6High
Oct5Moderate
Nov3Moderate
Dec2Low
Location & terrain

Where is Illescas?

Illescas sits at 40.1°N, 3.8°W, 590 m above sea level, in Spain. The nearest listed city is Seseña, 13 km away.

Topography around Illescas

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

Within 3 km, the terrain around Illescas has only modest variations in elevation — a maximum elevation change of 100 m around an average of 585 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 241 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,998 m.

The land around Illescas is covered by cropland (48%), grassland (22%) and artificial surfaces (22%) within 3 km, cropland (61%) and grassland (22%) within 16 km, and cropland (43%) and grassland (33%) within 80 km.

3 km
100 m
16 km
241 m
80 km
1,998 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Seseña 13 km · Humanes de Madrid 14 km · Parla 14 km · Valdemoro 16 km · Arroyomolinos 18 km · Pinto 18 km · Fuenlabrada 19 km · Ciempozuelos 20 km

Spain travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$38,627
2025
Happiness
6.5 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
3.9
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 540
Religion
Roman Catholic 58%atheist 16%agnostic 11%non-believer 11%

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 Illescas (40.1221°, -3.847°, elevation 590 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).