Azambuja weather in September

In September, Azambuja sees average daytime highs of 28°C and overnight lows near 16°C, with 30 mm of rain across 4.3 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 30°C in the first days to 26°C by the end. The sky is clear or mostly clear about 60% of the time in September, and the air most often feels comfortable.

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 Azambuja's 4th-clearest and 9th-windiest month. For the whole year in context, see Azambuja's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
16°
10th coldest
Rainfall
30 mm
4.3 wet days
Daylight
12 h 18 min
6:22 AM – 6:37 PM
Cloud cover
35%
4th clearest
Wind
11 km/h
9th windiest
Solar energy
5.2 kWh/m²
Travel score
7.2
out of 10

Azambuja is municipal capital in Lisboa district, 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 26°C by the end.

A typical September day in Azambuja 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 23°C and 33°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

10°20°30°40°151015202530
Avg high (°C)Avg low (°C)
13017
23017
33017
43017
53016
62916
72916
82916
92916
102916
112916
122916
132816
142816
152816
162816
172816
182816
192716
202715
212715
222715
232715
242715
252615
262615
272615
282615
292615
302615

Azambuja 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
Jan15° / 578.19.64.6
Feb16° / 456.510.55.4
Mar19° / 527.611.76.6
Apr21° / 10°538.1136.8
May24° / 13°466.914.17.5
Jun28° / 15°112.614.77.5
Jul31° / 17°30.914.56.3
Aug31° / 17°51.313.56.0
Sep28° / 16°304.312.37.2
Oct23° / 14°708.7117.1
Nov18° / 10°718.49.96.0
Dec15° / 688.39.34.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 60% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 24%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18614
28614
38515
48416
58317
68317
78119
88119
98020
108020
117822
127822
137723
147723
157624
167624
177426
187426
197327
207426
217327
227327
237228
247228
257129
267129
277030
287030
296832
306832

Chance of precipitation in September

Any precipitation

Azambuja gets around 30 mm of rain over 4.3 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 14% and peaks near 20% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
16
26
36
46
57
67
78
88
99
1010
1111
1211
1312
1413
1514
1615
1716
1817
1917
2018
2118
2219
2319
2419
2520
2619
2719
2819
2919
3019

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 42% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12847241
22847241
32847241
42946241
52946231
63046232
73046232
83045232
93145232
103145232
113144232
123144232
133244232
143243232
153342232
163342232
173442232
183441232
193541232
203640232
213640231
223739231
233738231
243838232
253937232
264036222
274136222
284235222
294334212
304434212

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 6:08 AM to 6:36 AM, and sunset from 7:02 PM to 6:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:087:02
212.96:097:00
312.86:106:59
412.86:116:57
512.76:126:56
612.76:136:54
712.66:146:52
812.66:156:51
912.66:166:49
1012.56:176:47
1112.56:186:46
1212.46:196:44
1312.46:196:42
1412.36:206:41
1512.36:216:39
1612.36:226:37
1712.26:236:36
1812.26:246:34
1912.16:256:32
2012.16:266:31
2112.06:276:29
2212.06:286:27
2311.96:296:26
2411.96:306:24
2511.96:316:22
2611.86:326:21
2711.86:336:19
2811.76:346:17
2911.76:356:16
3011.66:366:14

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.2 kWh/m².

For context, solar energy here swings from a low near 1.97 kWh/m² to a high of 7.59 kWh/m² in July across the year — September's 5.2 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.1Intense
26.0Intense
36.0Bright
45.9Bright
55.8Bright
65.8Bright
75.7Bright
85.7Bright
95.6Bright
105.5Bright
115.5Bright
125.4Bright
135.3Bright
145.3Bright
155.2Bright
165.2Bright
175.1Bright
185.0Bright
195.0Bright
204.9Bright
214.8Bright
224.8Bright
234.8Bright
244.7Bright
254.6Bright
264.6Bright
274.5Bright
284.5Bright
294.5Bright
304.4Bright
Planning a trip in September

Is September a good time to visit Azambuja?

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

7.2
Sightseeing
3rd-best month of the year
8.0
Beach & pool
4th-best month of the year

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

What to pack for Azambuja in September

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

In September, Azambuja sees daytime highs around 28°C and nights near 16°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.

light clothessun protection

Sea temperature near Azambuja in September

The nearest coast averages about 18°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 44 km away) is warmest in August at about 18°C and coldest in February near 14°C.

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

12°14°16°18°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr15Bracing
May16Cool
Jun17Cool
Jul18Cool
Aug18Cool
Sep18Cool
Oct18Cool
Nov17Cool
Dec15Cool

UV index in Azambuja 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 Azambuja peaks around July 15 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 15UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar6High
Apr8Very high
May7Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct5Moderate
Nov2Moderate
Dec2Low
Location & terrain

Where is Azambuja?

Azambuja sits at 39.1°N, 8.9°W, 25 m above sea level, in Portugal. The nearest listed city is Vila Franca de Xira, 17 km away.

Topography around Azambuja

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

Within 3 km, the terrain around Azambuja has only modest variations in elevation — a maximum elevation change of 110 m around an average of 22 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 282 m; within 80 km, large variations in elevation — a maximum elevation change of 674 m.

The land around Azambuja is covered by cropland (39%), grassland (31%) and trees (22%) within 3 km, cropland (35%), grassland (33%) and trees (22%) within 16 km, and grassland (35%), trees (28%) and water (26%) within 80 km.

3 km
110 m
16 km
282 m
80 km
674 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Vila Franca de Xira 17 km · Santarém 24 km · Vialonga 29 km · Póvoa de Santa Iria 29 km · Santa Iria da Azóia 32 km · Torres Vedras 34 km · São João da Talha 34 km · Loures 37 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 Azambuja (39.0703°, -8.8682°, elevation 25 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).