Arrasate / Mondragón weather in September

In September, Arrasate / Mondragón sees average daytime highs of 21°C and overnight lows near 12°C, with 61 mm of rain across 10.8 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 20°C by the end. The sky is clear or mostly clear about 31% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Arrasate / Mondragón's 3rd-clearest and 9th-windiest month. For the whole year in context, see Arrasate / Mondragón's year-round climate.

Daytime high
21°
3rd warmest
Overnight low
12°
10th coldest
Rainfall
61 mm
10.8 wet days
Daylight
12 h 18 min
6:56 AM – 7:13 PM
Cloud cover
56%
3rd clearest
Wind
7 km/h
9th windiest
Solar energy
4.17 kWh/m²
Travel score
6.4
out of 10

Arrasate / Mondragón is capital del municipio homónimo de Alto Deva, España.

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 23°C in the first days to 20°C by the end.

A typical September day in Arrasate / Mondragón reaches about 21°C in the afternoon and slips back to 12°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 3°C cooler than August and about 4°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12313
22313
32313
42313
52313
62213
72213
82213
92213
102212
112212
122212
132212
142212
152112
162112
172112
182112
192112
202112
212112
222111
232111
242011
252011
262011
272011
282011
292011
302011

How September really feels in Arrasate / Mondragón

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.

Arrasate / Mondragón weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 9713.739.21.7
Feb10° / 8712.63.710.22.1
Mar13° / 9013211.63.4
Apr15° / 10315.60.513.13.8
May18° / 9214.1014.45.1
Jun21° / 12°7111015.16.2
Jul23° / 14°519.5014.97.0
Aug24° / 14°539.8013.87.2
Sep21° / 12°6110.8012.36.4
Oct18° / 9412.80.110.85.3
Nov13° / 11514.40.79.53.0
Dec10° / 9313.31.78.91.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15050
25149
35149
45248
55248
65248
75149
85149
95149
105149
115149
125050
135050
145050
155050
164852
174852
184753
194753
204753
214654
224654
234654
244555
254456
264357
274357
284357
294357
304357

Chance of precipitation in September

Any precipitation

Arrasate / Mondragón gets around 61 mm of rain over 10.8 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 37% and peaks near 40% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
133
233
333
433
533
633
733
834
934
1035
1135
1236
1336
1437
1537
1638
1738
1838
1939
2039
2139
2239
2339
2439
2539
2640
2740
2840
2940
3040

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 51% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13539252
23639241
33739221
43939211
54039201
64139191
74239181
84339171
94439161
104539151
114639151
124738140
134838130
144938120
155038120
165138110
175337100
18543790
19563680
20573670
21593560
22593560
23603550
24613450
25623440
26633340
27633340
28653230
29663130
30683020

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours 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 84 minutes over September. Sunrise moves from 6:39 AM to 7:12 AM, and sunset from 7:41 PM to 6:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.06:397:41
213.06:407:39
312.96:417:37
412.96:427:35
512.86:437:33
612.86:447:32
712.76:457:30
812.76:477:28
912.66:487:26
1012.66:497:24
1112.56:507:22
1212.56:517:20
1312.46:527:19
1412.46:537:17
1512.36:547:15
1612.36:567:13
1712.26:577:11
1812.26:587:09
1912.16:597:07
2012.17:007:05
2112.07:017:04
2212.07:027:02
2311.97:047:00
2411.97:056:58
2511.87:066:56
2611.87:076:54
2711.77:086:52
2811.77:096:51
2911.67:116:49
3011.67:126:47

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.17 kWh/m².

For context, solar energy here swings from a low near 1.42 kWh/m² to a high of 5.85 kWh/m² in June across the year — September's 4.17 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.6Bright
54.6Bright
64.5Bright
74.5Bright
84.5Bright
94.4Bright
104.4Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.2Bright
164.1Bright
174.1Bright
184.0Bright
194.0Moderate
203.9Moderate
213.9Moderate
223.9Moderate
233.8Moderate
243.8Moderate
253.7Moderate
263.7Moderate
273.6Moderate
283.6Moderate
293.6Moderate
303.5Moderate
Planning a trip in September

Is September a good time to visit Arrasate / Mondragón?

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

6.4
Sightseeing
3rd-best month of the year
4.1
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Arrasate / Mondragón for sightseeing.

What to pack for Arrasate / Mondragón in September

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

In September, Arrasate / Mondragón sees daytime highs around 21°C and nights near 12°C. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Arrasate / Mondragón in September

The nearest coast averages about 21°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 36 km away) is warmest in August at about 22°C and coldest in February near 12°C.

It's comfortable for a long swim from Jul 3 to Sep 25 — about 2.8 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb12Bracing
Mar13Bracing
Apr14Bracing
May16Cool
Jun19Cool
Jul21Refreshing
Aug22Refreshing
Sep21Refreshing
Oct18Cool
Nov16Cool
Dec14Bracing

UV index in Arrasate / Mondragón 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 Arrasate / Mondragón peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 15UV 9Dec 20UV 1
UV index (midday)Level
Jan2Low
Feb2Low
Mar5Moderate
Apr6High
May6High
Jun8Very high
Jul9Very high
Aug8Very high
Sep5High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Arrasate / Mondragón?

Arrasate / Mondragón sits at 43.1°N, 2.5°W, 211 m above sea level, in Spain. The nearest listed city is Eibar, 13 km away.

Topography around Arrasate / Mondragón

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

Within 3 km, the terrain around Arrasate / Mondragón has large variations in elevation — a maximum elevation change of 861 m around an average of 358 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,336 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,497 m.

The land around Arrasate / Mondragón is covered by trees (76%) within 3 km, trees (77%) within 16 km, and trees (42%) and water (22%) within 80 km.

3 km
861 m
16 km
1,336 m
80 km
1,497 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Eibar 13 km · Ermua 14 km · Durango 17 km · Amorebieta 26 km · Gasteiz / Vitoria 28 km · Altsasu 32 km · Gernika-Lumo 32 km · Galdakao 34 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 Arrasate / Mondragón (43.0644°, -2.4898°, elevation 211 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).