Belas weather in October

In October, Belas sees average daytime highs of 20°C and overnight lows near 16°C, with 77 mm of rain across 8.9 wet days and about 11 hours of daylight. It is the 5th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 19°C by the end. The sky is clear or mostly clear about 41% of the time in October, and the air most often feels comfortable.

Daylight stretches from about 11 h 36 min at the start of October to 10 h 24 min by month's end. Set against the rest of the year, October is Belas's 7th-clearest and 12th-windiest month. For the whole year in context, see Belas's year-round climate.

Daytime high
20°
5th warmest
Overnight low
16°
8th coldest
Rainfall
77 mm
8.9 wet days
Daylight
11 hours
6:53 AM – 5:51 PM
Cloud cover
50%
7th clearest
Wind
16 km/h
12th windiest
Solar energy
3.62 kWh/m²
Travel score
6.7
out of 10

Belas is town in Sintra, in the Greater Lisbon Area of Portugal.

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

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 22°C in the first days to 19°C by the end.

A typical October day in Belas reaches about 20°C in the afternoon and slips back to 16°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 23°C. Set against its neighbours, October runs about 3°C cooler than September and about 4°C warmer than November.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12217
22217
32217
42217
52216
62216
72116
82116
92116
102116
112116
122116
132116
142116
152016
162016
172016
182016
192016
202016
212015
222015
232015
242015
251915
261915
271915
281915
291915
301915
311915

Belas weather by month

How October compares with the rest of the year at a glance. October is the 5th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan14° / 10°688.99.64.2
Feb15° / 10°517.510.54.6
Mar16° / 11°538.111.75.5
Apr17° / 12°518.4136.0
May19° / 14°425.914.17.1
Jun22° / 16°102.114.78.4
Jul24° / 18°20.614.49.3
Aug24° / 18°4113.59.2
Sep23° / 17°294.112.38.3
Oct20° / 16°778.9116.7
Nov17° / 13°8210.29.95.5
Dec15° / 11°799.49.34.5

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 18% of October, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17030
27030
36832
46832
56832
66832
76634
86634
96634
106436
116436
126337
136238
146238
156040
165941
175842
185743
195743
205644
215446
225347
235347
245248
255248
265050
275050
284951
294951
304852
314951

Chance of precipitation in October

Any precipitation

Belas gets around 77 mm of rain over 8.9 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 29% and peaks near 35% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
119
219
320
420
521
622
722
823
924
1026
1127
1228
1329
1430
1531
1632
1732
1833
1933
2034
2134
2234
2335
2435
2535
2635
2735
2835
2935
3035
3135

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the comfortable band about 39% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12043324
22143314
32243314
42342304
52442294
62541294
72641284
82741284
92840284
102940284
112940284
123039283
133039283
143039283
153039283
163039283
173039283
183040283
193040272
203140272
213139272
223239272
233338262
243438262
253537262
263636262
273835252
283935242
294134231
304334221
314533211

Wind in October

Winds average 16 km/h in October, the calmest month.

Across October, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 36 min at the start of October to 10 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over October. Sunrise moves from 6:38 AM to 7:09 AM, and sunset from 6:14 PM to 5:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:386:14
211.66:396:12
311.56:406:11
411.56:416:09
511.46:426:08
611.46:436:06
711.36:446:05
811.36:456:03
911.36:466:01
1011.26:476:00
1111.26:485:58
1211.16:495:57
1311.16:505:56
1411.16:515:54
1511.06:525:53
1611.06:535:51
1710.96:545:50
1810.96:555:48
1910.86:565:47
2010.86:575:46
2110.86:585:44
2210.76:595:43
2310.77:005:42
2410.67:015:40
2510.67:035:39
2610.67:045:38
2710.57:055:37
2810.57:065:36
2910.57:075:34
3010.47:085:33
3110.47:095:32

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.62 kWh/m².

For context, solar energy here swings from a low near 2.01 kWh/m² to a high of 7.59 kWh/m² in July across the year — October's 3.62 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.4Bright
34.3Bright
44.3Bright
54.2Bright
64.2Bright
74.1Bright
84.1Bright
94.0Bright
104.0Moderate
113.9Moderate
123.8Moderate
133.8Moderate
143.7Moderate
153.6Moderate
163.6Moderate
173.5Moderate
183.5Moderate
193.4Moderate
203.3Moderate
213.3Moderate
223.2Moderate
233.2Moderate
243.1Moderate
253.1Moderate
263.1Moderate
273.0Moderate
283.0Moderate
293.0Moderate
302.9Moderate
312.9Moderate
Planning a trip in October

Is October a good time to visit Belas?

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

6.7
Sightseeing
6th-best month of the year
3.7
Beach & pool
5th-best month of the year

October is a reasonable time to visit Belas for sightseeing.

What to pack for Belas in October

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

In October, Belas sees daytime highs around 20°C and nights near 16°C. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Belas in October

The nearest coast averages about 18°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 19 km away) is warmest in September at about 19°C and coldest in February near 15°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

14°16°18°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan15Cool
Feb15Bracing
Mar15Bracing
Apr15Cool
May16Cool
Jun18Cool
Jul18Cool
Aug19Cool
Sep19Cool
Oct18Cool
Nov17Cool
Dec16Cool

UV index in Belas in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October 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 Belas peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highHighModerateJul 15UV 9Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar6High
Apr8Very high
May7Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct5High
Nov3Moderate
Dec2Low
Location & terrain

Where is Belas?

Belas sits at 38.8°N, 9.3°W, 147 m above sea level, in Portugal. The nearest listed city is Olival, 1.0 km away.

Topography around Belas

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

Within 3 km, the terrain around Belas has only modest variations in elevation — a maximum elevation change of 195 m around an average of 187 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 515 m; within 80 km, large variations in elevation — a maximum elevation change of 656 m.

The land around Belas is covered by trees (38%), artificial surfaces (35%) and grassland (25%) within 3 km, grassland (28%), artificial surfaces (28%) and trees (25%) within 16 km, and water (43%) and grassland (27%) within 80 km.

3 km
195 m
16 km
515 m
80 km
656 m
treesshrubsgrasslandcroplandartificial surfaceswater
October weather nearby: Olival 1.0 km · Queluz 2.0 km · Massamá 3.0 km · Cacém 3.0 km · Falagueira 3.0 km · Amadora 4.0 km · Damaia 5.0 km · Alfornelos 5.0 km

Portugal travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E / F
230 V · 50 Hz
Prices
≈ 60% of US
price level, 2025
GDP per capita
$32,082
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
95%
of population, 2024
Homicide rate
0.7
per 100k, 2022
Road deaths
8.2
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 612
Religion
Catholic 68%not applicable 13%no religion 12%no response 2%

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 Belas (38.7767°, -9.2635°, elevation 147 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).