Baião weather in September

In September, Baião sees average daytime highs of 23°C and overnight lows near 13°C, with 64 mm of rain across 7 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 25°C in the first days to 21°C by the end. The sky is clear or mostly clear about 50% 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 Baião's 3rd-clearest and 12th-windiest month. For the whole year in context, see Baião's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
13°
10th coldest
Rainfall
64 mm
7 wet days
Daylight
12 h 18 min
6:18 AM – 6:35 PM
Cloud cover
43%
3rd clearest
Wind
7 km/h
12th windiest
Solar energy
4.81 kWh/m²
Travel score
7.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 25°C in the first days to 21°C by the end.

A typical September day in Baião reaches about 23°C in the afternoon and slips back to 13°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 28°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12514
22514
32514
42514
52514
62514
72514
82414
92413
102413
112413
122413
132413
142313
152313
162313
172313
182313
192312
202212
212212
222212
232212
242212
252212
262212
272212
282112
292112
302111

Baião weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan11° / 15211.99.42.4
Feb12° / 1029.110.43.3
Mar15° / 11710.811.74.5
Apr16° / 11812.513.14.9
May19° / 10°9811.814.36.0
Jun23° / 13°427.114.97.5
Jul26° / 14°244.214.78.2
Aug26° / 15°304.713.68.0
Sep23° / 13°64712.37.5
Oct19° / 10°15912.410.95.6
Nov14° / 15012.69.73.7
Dec11° / 16312.19.12.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 34%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17624
27624
37525
47426
57426
67228
77228
87129
97030
106931
116931
126832
136634
146535
156535
166436
176337
186238
196238
206238
216139
226139
236139
246040
256040
265941
275941
285941
295842
305842

Chance of precipitation in September

Any precipitation

Baião gets around 64 mm of rain over 7 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 24% and peaks near 28% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
119
219
319
419
519
619
720
820
921
1022
1122
1223
1323
1424
1524
1625
1725
1825
1926
2026
2126
2227
2327
2427
2527
2627
2727
2827
2927
3028

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 58% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
1444511
2454511
3464410
447449
548439
649438
750428
852417
952417
1053407
1155396
1255396
1356386
1458375
1558375
1659365
1761354
1861354
1963343
2063343
2164333
2264333
2365323
2465323
2566313
2667303
2768293
2868293
2969283
3070273

Wind in September

Winds average 7 km/h in September, the calmest month.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 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
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:03 AM to 6:33 AM, and sunset from 7:01 PM to 6:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.06:037:01
212.96:046:59
312.96:056:57
412.86:066:56
512.86:076:54
612.76:086:52
712.76:096:50
812.66:106:49
912.66:116:47
1012.66:126:45
1112.56:136:43
1212.56:146:42
1312.46:156:40
1412.46:166:38
1512.36:176:36
1612.36:186:35
1712.26:196:33
1812.26:206:31
1912.16:216:29
2012.16:236:27
2112.06:246:26
2212.06:256:24
2311.96:266:22
2411.96:276:20
2511.86:286:19
2611.86:296:17
2711.86:306:15
2811.76:316:13
2911.76:326:12
3011.66:336:10

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.81 kWh/m².

For context, solar energy here swings from a low near 1.58 kWh/m² to a high of 7.21 kWh/m² in July across the year — September's 4.81 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.6Bright
45.5Bright
55.5Bright
65.4Bright
75.3Bright
85.3Bright
95.2Bright
105.1Bright
115.1Bright
125.0Bright
134.9Bright
144.9Bright
154.8Bright
164.8Bright
174.7Bright
184.6Bright
194.6Bright
204.5Bright
214.5Bright
224.4Bright
234.4Bright
244.3Bright
254.3Bright
264.2Bright
274.2Bright
284.1Bright
294.1Bright
304.0Bright
Planning a trip in September

Hazard calendar for Baião

In seasonPeak

None of Baião's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Baião's rainy season runs October–May, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Baião?

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

7.5
Sightseeing
3rd-best month of the year
5.8
Beach & pool
3rd-best month of the year

September is one of the better times to visit Baião for general sightseeing.

What to pack for Baião in September

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

In September, Baião sees daytime highs around 23°C and nights near 13°C. Worth packing: light clothes and sun protection. About 7 days see rain.

light clothessun protection

Sea temperature near Baião in September

The nearest coast averages about 17°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 50 km away) is warmest in September at about 17°C and coldest in February near 13°C.

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

12°14°16°18°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr14Bracing
May16Cool
Jun17Cool
Jul17Cool
Aug17Cool
Sep17Cool
Oct17Cool
Nov16Cool
Dec14Bracing

UV index in Baião 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 Baião peaks around July 13 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 13UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5High
Apr7High
May7High
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct5Moderate
Nov2Moderate
Dec2Low

Air quality in Baião 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 Baião is worst in August — around 25 µg/m³ PM2.5 (moderate), about 3.4× the cleanest month (November, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodAug 2425 µg/m³Nov 237 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar14Moderate
Apr12Moderate
May8Good
Jun9Good
Jul9Good
Aug25Moderate
Sep24Moderate
Oct18Moderate
Nov7Good
Dec7Good
Location & terrain

Where is Baião?

Baião sits at 41.2°N, 8.0°W, 577 m above sea level, in Portugal. The nearest listed city is Paredes, 25 km away.

Topography around Baião

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

Within 3 km, the terrain around Baião has significant variations in elevation — a maximum elevation change of 556 m around an average of 645 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,395 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,521 m.

The land around Baião is covered by trees (48%) and grassland (47%) within 3 km, grassland (50%) and trees (44%) within 16 km, and trees (41%) and grassland (39%) within 80 km.

3 km
556 m
16 km
1,395 m
80 km
1,521 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Paredes 25 km · Felgueiras 26 km · Vila Real 29 km · Arouca 31 km · Fafe 34 km · Guimarães 38 km · Valongo 39 km · São Pedro da Cova 39 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 Baião (41.1627°, -8.0347°, elevation 577 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. 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).