Melgaço weather in September

In September, Melgaço sees average daytime highs of 33°C and overnight lows near 24°C, with 22 mm of rain across 5.7 wet days and about 12 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 50% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Melgaço's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Melgaço's year-round climate.

Daytime high
33°
2nd warmest
Overnight low
24°
9th coldest
Rainfall
22 mm
5.7 wet days
Daylight
12 hours
6:17 AM – 6:17 PM
Cloud cover
44%
2nd clearest
Wind
9 km/h
2nd windiest
Solar energy
6.29 kWh/m²
Travel score
3.9
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical September day in Melgaço reaches about 33°C in the afternoon and slips back to 24°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 34°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13324
23324
33324
43324
53324
63324
73324
83324
93324
103324
113324
123324
133324
143324
153324
163324
173324
183325
193325
203325
213325
223325
233325
243325
253325
263325
273325
283325
293325
303325

How September really feels in Melgaço

Once humidity and wind are folded in, September averages 30 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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Melgaço weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 24°23527.212.12.7
Feb30° / 24°30926.312.12.7
Mar30° / 24°36629.7122.6
Apr30° / 24°36328.8122.6
May31° / 24°27526.511.92.8
Jun31° / 24°13719.611.93.4
Jul31° / 24°8215.111.94.0
Aug32° / 24°337.611.94.2
Sep33° / 24°225.7123.9
Oct33° / 25°296.5123.6
Nov33° / 25°478.312.13.5
Dec32° / 25°10918.312.13.1

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 29% of September, with mostly cloudy or overcast conditions the remaining 20%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18416
28317
38317
48218
58218
68218
78218
88119
98119
108119
118119
128119
138119
148119
158020
168020
178020
187921
198020
208020
217921
227921
237921
247921
257822
267822
277723
287723
297624
307525

Chance of precipitation in September

Any precipitation

Melgaço gets around 22 mm of rain over 5.7 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 19% and peaks near 21% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
120
221
321
421
521
621
721
821
921
1021
1121
1220
1320
1420
1519
1619
1719
1818
1918
2018
2118
2218
2318
2417
2517
2617
2717
2817
2917
3017

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 81% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
107228
207327
307327
407426
507525
607525
717524
817524
917623
1017623
1117623
1217722
1317722
1417821
1517920
1608119
1708119
1808218
1908317
2008416
2108515
2208614
2308713
2408713
2508812
2608911
2708911
2808911
2909010
3009010

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 hours at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over September. Sunrise moves from 6:24 AM to 6:12 AM, and sunset from 6:22 PM to 6:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:246:22
212.06:236:21
312.06:236:21
412.06:226:21
512.06:226:20
612.06:226:20
712.06:216:20
812.06:216:19
912.06:206:19
1012.06:206:19
1112.06:206:18
1212.06:196:18
1312.06:196:18
1412.06:186:18
1512.06:186:17
1612.06:176:17
1712.06:176:17
1812.06:176:16
1912.06:166:16
2012.06:166:16
2112.06:156:15
2212.06:156:15
2312.06:156:15
2412.06:146:14
2512.06:146:14
2612.06:136:14
2712.06:136:13
2812.06:136:13
2912.06:126:13
3012.06:126:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.29 kWh/m².

For context, solar energy here swings from a low near 3.93 kWh/m² to a high of 6.41 kWh/m² in October across the year — September's 6.29 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.2Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.4Intense
216.4Intense
226.4Intense
236.4Intense
246.4Intense
256.4Intense
266.4Intense
276.4Intense
286.4Intense
296.5Intense
306.5Intense
Planning a trip in September

Hazard calendar for Melgaço

In seasonPeak

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

Melgaço's monsoon runs January–May, when most of the year's rain falls.

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

Is September a good time to visit Melgaço?

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

3.9
Sightseeing
3rd-best month of the year
7.0
Beach & pool
1st-best month of the year

September is a weaker month for outdoor sightseeing in Melgaço. The water and warmth also suit a beach or pool day.

What to pack for Melgaço in September

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

In September, Melgaço sees daytime highs around 33°C and nights near 24°C. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Melgaço in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Melgaço peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 17 at about 10 (extreme).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 14UV 15Jul 17UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun10Extreme
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov10Extreme
Dec10Extreme

Air quality in Melgaço 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 Melgaço is worst in February — around 18 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (July, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 2018 µg/m³Jul 119 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb18Moderate
Mar18Moderate
Apr15Moderate
May11Good
Jun9Good
Jul9Good
Aug10Good
Sep12Good
Oct15Moderate
Nov15Moderate
Dec14Moderate
Location & terrain

Where is Melgaço?

Melgaço sits at 1.8°S, 50.7°W, 11 m above sea level, in Brazil. The nearest listed city is Portel, 19 km away.

Topography around Melgaço

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

Within 3 km, the terrain around Melgaço has only modest variations in elevation — a maximum elevation change of 25 m around an average of 7 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 37 m; within 80 km, only modest variations in elevation — a maximum elevation change of 75 m.

The land around Melgaço is covered by trees (49%) and water (45%) within 3 km, trees (70%) and water (21%) within 16 km, and trees (90%) within 80 km.

3 km
25 m
16 km
37 m
80 km
75 m
treesgrasslandartificial surfaceswaterwetland
September weather nearby: Portel 19 km · Breves 29 km · Bagre 57 km · Oeiras do Pará 98 km · Curralinho 102 km · Gurupá 112 km · Anajás 125 km · São Sebastião da Boa Vista 132 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 Melgaço (-1.8044°, -50.7122°, elevation 11 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. 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).