Portalegre weather in September

In September, Portalegre sees average daytime highs of 28°C and overnight lows near 16°C, with 33 mm of rain across 5.2 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 30°C in the first days to 25°C by the end. The sky is clear or mostly clear about 56% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Portalegre's 4th-clearest and 12th-windiest month. For the whole year in context, see Portalegre's year-round climate.

Daytime high
28°
4th warmest
Overnight low
16°
10th coldest
Rainfall
33 mm
5.2 wet days
Daylight
12 h 18 min
6:16 AM – 6:32 PM
Cloud cover
37%
4th clearest
Wind
10 km/h
12th windiest
Solar energy
5.25 kWh/m²
Travel score
7.1
out of 10

Portalegre 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 30°C in the first days to 25°C by the end.

A typical September day in Portalegre reaches about 28°C in the afternoon and slips back to 16°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 33°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

10°20°30°40°151015202530
Avg high (°C)Avg low (°C)
13017
23017
33017
43017
53017
62916
72916
82916
92916
102916
112816
122816
132816
142816
152816
162716
172715
182715
192715
202715
212615
222615
232615
242615
252615
262615
272514
282514
292514
302514

How September really feels in Portalegre

Once humidity and wind are folded in, September 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

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

Portalegre weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan13° / 6699.53.6
Feb14° / 547.310.54.5
Mar17° / 61811.76.0
Apr19° / 598.7136.4
May23° / 12°517.614.17.3
Jun28° / 15°142.714.77.2
Jul32° / 17°41.214.55.4
Aug32° / 17°71.813.55.3
Sep28° / 16°335.212.37.1
Oct22° / 13°838.8116.9
Nov16° / 798.99.85.3
Dec13° / 788.89.33.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 26%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18614
28614
38515
48515
58317
68317
78218
88119
98020
107921
117822
127723
137723
147525
157525
167327
177228
187129
197030
206931
216832
226733
236733
246634
256634
266535
276535
286634
296535
306535

Chance of precipitation in September

Any precipitation

Portalegre gets around 33 mm of rain over 5.2 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 17% and peaks near 22% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
19
29
39
410
510
611
711
812
913
1014
1115
1216
1316
1417
1518
1619
1719
1820
1920
2021
2121
2222
2322
2422
2522
2622
2721
2821
2921
3021

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 62% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
158366
258366
359365
460355
560355
661345
761336
862326
963316
1062317
1163307
1263298
1363298
1463289
1563289
16622810
17632710
18632710
19632710
20632710
21632710
22632710
23632710
24632710
25632710
26642610
2765269
2865269
2965269
3066259

Wind in September

Winds average 10 km/h in September, the calmest month.

Across September, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min 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 78 minutes over September. Sunrise moves from 6:02 AM to 6:30 AM, and sunset from 6:57 PM to 6:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:026:57
212.96:036:55
312.86:046:53
412.86:056:52
512.76:066:50
612.76:076:48
712.66:086:47
812.66:096:45
912.66:106:43
1012.56:116:42
1112.56:126:40
1212.46:136:38
1312.46:146:37
1412.36:156:35
1512.36:166:33
1612.36:166:32
1712.26:176:30
1812.26:186:28
1912.16:196:27
2012.16:206:25
2112.06:216:23
2212.06:226:21
2311.96:236:20
2411.96:246:18
2511.96:256:16
2611.86:266:15
2711.86:276:13
2811.76:286:11
2911.76:296:10
3011.66:306:08

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.25 kWh/m².

For context, solar energy here swings from a low near 1.91 kWh/m² to a high of 7.79 kWh/m² in July across the year — September's 5.25 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.1Intense
36.0Intense
46.0Bright
55.9Bright
65.9Bright
75.8Bright
85.8Bright
95.7Bright
105.6Bright
115.5Bright
125.5Bright
135.4Bright
145.3Bright
155.3Bright
165.2Bright
175.1Bright
185.1Bright
195.0Bright
204.9Bright
214.9Bright
224.8Bright
234.8Bright
244.7Bright
254.7Bright
264.6Bright
274.6Bright
284.5Bright
294.5Bright
304.4Bright
Planning a trip in September

Is September a good time to visit Portalegre?

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
7.7
Beach & pool
4th-best month of the year

September is one of the better times to visit Portalegre for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Portalegre in September

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

In September, Portalegre sees daytime highs around 28°C and nights near 16°C. Pack light clothes. Worth having: sun protection. About 5 days see rain.

light clothessun protection

UV index in Portalegre 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 Portalegre peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 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 17UV 9Dec 19UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar6High
Apr8Very high
May7High
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct5Moderate
Nov2Moderate
Dec2Low
Location & terrain

Where is Portalegre?

Portalegre sits at 39.3°N, 7.4°W, 460 m above sea level, in Portugal. The nearest listed city is Castelo Branco, 59 km away.

Topography around Portalegre

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

Within 3 km, the terrain around Portalegre has significant variations in elevation — a maximum elevation change of 416 m around an average of 491 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 822 m; within 80 km, large variations in elevation — a maximum elevation change of 1,062 m.

The land around Portalegre is covered by trees (47%) and grassland (40%) within 3 km, grassland (57%) and trees (36%) within 16 km, and grassland (59%) and trees (29%) within 80 km.

3 km
416 m
16 km
822 m
80 km
1,062 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Castelo Branco 59 km · Badajoz 61 km · Montijo 82 km · Évora 91 km · Tomar 91 km · Entroncamento 91 km · Cáceres 93 km · Torres Novas 98 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 Portalegre (39.2938°, -7.4312°, elevation 460 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).