Monção weather in September

In September, Monção sees average daytime highs of 22°C and overnight lows near 13°C, with 89 mm of rain across 8.5 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 24°C in the first days to 21°C by the end. The sky is clear or mostly clear about 45% 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 Monção's 3rd-clearest and 12th-windiest month. For the whole year in context, see Monção's year-round climate.

Daytime high
22°
3rd warmest
Overnight low
13°
10th coldest
Rainfall
89 mm
8.5 wet days
Daylight
12 h 18 min
6:20 AM – 6:37 PM
Cloud cover
46%
3rd clearest
Wind
8 km/h
12th windiest
Solar energy
4.73 kWh/m²
Travel score
7.1
out of 10

Monção is human settlement in Portugal.

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 24°C in the first days to 21°C by the end.

A typical September day in Monção reaches about 22°C in the afternoon and slips back to 13°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 27°C. Set against its neighbours, September runs about 2°C cooler than August and about 4°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12414
22414
32414
42414
52414
62314
72314
82314
92314
102314
112313
122313
132313
142213
152213
162213
172213
182213
192213
202213
212113
222112
232112
242112
252112
262112
272112
282112
292112
302012

Monção 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° / 20013.39.32.7
Feb13° / 13410.510.33.4
Mar15° / 15611.511.74.4
Apr16° / 15514.613.14.6
May19° / 10°13613.514.45.6
Jun22° / 13°628.4157.0
Jul24° / 15°365.614.88.1
Aug25° / 15°485.913.78.1
Sep22° / 13°898.512.37.1
Oct18° / 11°21113.410.85.5
Nov14° / 21214.19.63.8
Dec12° / 20613.393.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% 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 41%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16931
26931
36931
46931
56733
66733
76634
86634
96535
106535
116337
126337
136139
146139
155941
165941
175743
185743
195644
205545
215446
225446
235347
245248
255248
265149
275149
285149
295149
305050

Chance of precipitation in September

Any precipitation

Monção gets around 89 mm of rain over 8.5 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 29% and peaks near 33% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
123
223
323
423
524
624
724
825
925
1026
1127
1228
1328
1429
1530
1630
1731
1831
1931
2032
2132
2232
2332
2432
2532
2632
2732
2832
2933
3033

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 44% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
1304921
2304920
3314920
4314919
5324919
6334918
7344917
8354817
9364817
10374716
11384616
12394516
13404415
14414415
15434314
16444213
17464213
18474112
19494111
20504010
2151409
2252399
2353398
2455387
2555387
2657376
2758366
2859356
2961345
3062335

Wind in September

Winds average 8 km/h in September, the calmest month.

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

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
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 6:04 AM to 6:35 AM, and sunset from 7:04 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.06:047:04
212.96:057:02
312.96:067:00
412.96:076:58
512.86:086:56
612.86:096:55
712.76:106:53
812.76:116:51
912.66:126:49
1012.66:136:48
1112.56:146:46
1212.56:166:44
1312.46:176:42
1412.46:186:40
1512.36:196:38
1612.36:206:37
1712.26:216:35
1812.26:226:33
1912.16:236:31
2012.16:246:29
2112.06:256:27
2212.06:266:26
2311.96:276:24
2411.96:296:22
2511.86:306:20
2611.86:316:18
2711.76:326:17
2811.76:336:15
2911.66:346:13
3011.66:356:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.73 kWh/m².

For context, solar energy here swings from a low near 1.51 kWh/m² to a high of 7.11 kWh/m² in July across the year — September's 4.73 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.5Bright
35.5Bright
45.4Bright
55.3Bright
65.3Bright
75.2Bright
85.2Bright
95.1Bright
105.0Bright
115.0Bright
124.9Bright
134.9Bright
144.8Bright
154.7Bright
164.7Bright
174.6Bright
184.5Bright
194.5Bright
204.4Bright
214.4Bright
224.3Bright
234.3Bright
244.2Bright
254.2Bright
264.1Bright
274.0Bright
284.0Bright
293.9Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Monção

In seasonPeak

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

Monção'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 Monção?

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

7.1
Sightseeing
3rd-best month of the year
5.0
Beach & pool
3rd-best month of the year

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

What to pack for Monção in September

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

In September, Monção sees daytime highs around 22°C and nights near 13°C. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Monção 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 33 km away) is warmest in August 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
Mar13Bracing
Apr14Bracing
May15Cool
Jun17Cool
Jul17Cool
Aug17Cool
Sep17Cool
Oct16Cool
Nov15Cool
Dec14Bracing

UV index in Monção 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 Monção peaks around July 12 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 12UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr7High
May7High
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Monção 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 Monção is worst in September — around 19 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (November, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodSep 1819 µg/m³Nov 237 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar15Moderate
Apr12Good
May8Good
Jun8Good
Jul9Good
Aug14Moderate
Sep19Moderate
Oct17Moderate
Nov7Good
Dec7Good
Location & terrain

Where is Monção?

Monção sits at 42.1°N, 8.5°W, 34 m above sea level, in Portugal. The nearest listed city is Ponteareas, 11 km away.

Topography around Monção

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

Within 3 km, the terrain around Monção has only modest variations in elevation — a maximum elevation change of 164 m around an average of 61 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 948 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,517 m.

The land around Monção is covered by trees (47%) and grassland (35%) within 3 km, trees (60%) and grassland (34%) within 16 km, and trees (46%), grassland (28%) and water (21%) within 80 km.

3 km
164 m
16 km
948 m
80 km
1,517 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Ponteareas 11 km · Tui 14 km · Porriño 15 km · Redondela 25 km · Vigo 26 km · Arcos de Valdevez 26 km · Nigrán 28 km · Moaña 31 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 Monção (42.0789°, -8.4808°, elevation 34 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).