Caldes de Montbui weather in August

In August, Caldes de Montbui sees average daytime highs of 28°C and overnight lows near 17°C, with 66 mm of rain across 9.7 wet days and about 13.7 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 27°C by the end. The sky is clear or mostly clear about 47% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 18 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Caldes de Montbui's 2nd-clearest and 10th-windiest month. For the whole year in context, see Caldes de Montbui's year-round climate.

Daytime high
28°
2nd warmest
Overnight low
17°
12th coldest
Rainfall
66 mm
9.7 wet days
Daylight
13 h 42 min
6:05 AM – 7:46 PM
Cloud cover
43%
2nd clearest
Wind
6 km/h
10th windiest
Solar energy
5.67 kWh/m²
Travel score
6.5
out of 10

Caldes de Montbui is capital town of the municipality of Caldes de Montbui, Spain.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 28°C in the first days to 27°C by the end.

A typical August day in Caldes de Montbui reaches about 28°C in the afternoon and slips back to 17°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 31°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12918
22818
32818
42818
52818
62818
72818
82818
92818
102818
112817
122817
132817
142817
152817
162817
172817
182817
192817
202817
212817
222717
232717
242717
252717
262717
272717
282717
292716
302616
312616

How August really feels in Caldes de Montbui

Once humidity and wind are folded in, August 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

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Caldes de Montbui weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan11° / 446.20.59.33.0
Feb12° / 406.91.110.33.6
Mar15° / 568.70.311.74.9
Apr17° / 8211.4013.15.4
May21° / 10°8111.3014.36.3
Jun25° / 14°648.90157.1
Jul28° / 17°528014.76.8
Aug28° / 17°669.7013.76.5
Sep24° / 14°9411.7012.36.6
Oct20° / 10°10110.7010.96.2
Nov15° / 657.709.74.6
Dec11° / 4360.493.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 23% of August, with mostly cloudy or overcast conditions the remaining 29%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17723
27624
37624
47525
57426
67426
77327
87327
97327
107228
117228
127327
137228
147228
157327
167327
177327
187228
197228
207228
217129
227030
237030
246832
256733
266535
276535
286337
296238
306139
315941

Chance of precipitation in August

Any precipitation

Caldes de Montbui gets around 66 mm of rain over 9.7 wet days in August. 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 40% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
127
227
328
429
529
629
730
830
930
1031
1131
1231
1331
1431
1531
1630
1730
1830
1930
2031
2131
2231
2332
2433
2534
2635
2736
2837
2938
3039
3140

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the humid band about 52% of days. Sticky, muggy-or-worse air turns up on roughly 24% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
121554281
221553291
321652291
421652291
521752281
631751281
731851271
831851271
931852261
1031952260
1131953250
1231953250
1341953240
1441954230
1541954230
1641955220
1741856220
1841856220
1941856220
2051854230
2151854230
2251854230
2361952230
2461952230
2562052220
2672150220
2772249220
2872349210
2972448200
3082647190
3182746180

Wind in August

Winds average 6 km/h in August.

Across August, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 18 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over August. Sunrise moves from 5:49 AM to 6:21 AM, and sunset from 8:05 PM to 7:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.35:498:05
214.25:508:04
314.25:518:03
414.25:528:02
514.15:538:01
614.15:548:00
714.15:557:58
814.05:567:57
914.05:577:56
1013.95:587:55
1113.96:007:53
1213.96:017:52
1313.86:027:50
1413.86:037:49
1513.76:047:48
1613.76:057:46
1713.66:067:45
1813.66:077:43
1913.66:087:42
2013.56:097:40
2113.56:107:39
2213.46:117:37
2313.46:127:35
2413.36:137:34
2513.36:147:32
2613.36:157:31
2713.26:167:29
2813.26:177:27
2913.16:187:26
3013.16:207:24
3113.06:217:22

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.67 kWh/m².

For context, solar energy here swings from a low near 1.81 kWh/m² to a high of 6.6 kWh/m² in June across the year — August's 5.67 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.1Intense
46.1Intense
56.0Intense
66.0Intense
76.0Bright
85.9Bright
95.9Bright
105.9Bright
115.8Bright
125.8Bright
135.8Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.6Bright
195.6Bright
205.5Bright
215.5Bright
225.4Bright
235.4Bright
245.3Bright
255.3Bright
265.2Bright
275.2Bright
285.1Bright
295.1Bright
305.0Bright
314.9Bright
Planning a trip in August

Is August a good time to visit Caldes de Montbui?

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

6.5
Sightseeing
4th-best month of the year
7.0
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Caldes de Montbui for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Caldes de Montbui in August

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

In August, Caldes de Montbui sees daytime highs around 28°C and nights near 17°C. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Caldes de Montbui in August

The nearest coast averages about 25°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 34 km away) is warmest in August at about 25°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 11 to Oct 23 — about 4.4 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr14Bracing
May17Cool
Jun21Refreshing
Jul24Refreshing
Aug25Warm
Sep24Refreshing
Oct21Refreshing
Nov17Cool
Dec15Bracing

UV index in Caldes de Montbui in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Caldes de Montbui 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 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 15UV 9Dec 20UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr7High
May6High
Jun8Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Caldes de Montbui?

Caldes de Montbui sits at 41.6°N, 2.2°E, 232 m above sea level, in Spain. The nearest listed city is Castellar del Vallès, 7.0 km away.

Topography around Caldes de Montbui

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

Within 3 km, the terrain around Caldes de Montbui has significant variations in elevation — a maximum elevation change of 413 m around an average of 273 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,055 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,518 m.

The land around Caldes de Montbui is covered by trees (51%) within 3 km, trees (56%) within 16 km, and trees (50%) and water (25%) within 80 km.

3 km
413 m
16 km
1,055 m
80 km
2,518 m
treesshrubsgrasslandcroplandartificial surfaceswater
August weather nearby: Castellar del Vallès 7.0 km · Parets del Vallès 9.0 km · Canovelles 10 km · Granollers 10 km · Mollet del Vallès 11 km · Sabadell 11 km · Santa Perpètua de Mogoda 11 km · Sant Quirze del Vallès 13 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 Caldes de Montbui (41.6333°, 2.1667°, elevation 232 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).