Angra do Heroísmo weather in September

In September, Angra do Heroísmo sees average daytime highs of 22°C and overnight lows near 21°C, with 45 mm of rain across 8.3 wet days and about 12.3 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 35% of the time in September, and the air most often feels muggy.

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 Angra do Heroísmo's 3rd-clearest and 9th-windiest month. For the whole year in context, see Angra do Heroísmo's year-round climate.

Daytime high
22°
2nd warmest
Overnight low
21°
11th coldest
Rainfall
45 mm
8.3 wet days
Daylight
12 h 12 min
6:36 AM – 6:51 PM
Cloud cover
54%
3rd clearest
Wind
22 km/h
9th windiest
Solar energy
4.75 kWh/m²
Travel score
6.9
out of 10

Angra do Heroísmo is city seat of Angra do Heroísmo municipality, Azores, Portugal.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical September day in Angra do Heroísmo reaches about 22°C in the afternoon and slips back to 21°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 23°C. Set against its neighbours, September runs on par with August and about 2°C warmer than October.

15°18°20°23°25°151015202530
Avg high (°C)Avg low (°C)
12221
22221
32221
42221
52221
62221
72221
82221
92221
102221
112221
122221
132221
142221
152221
162221
172221
182221
192221
202221
212220
222220
232220
242120
252120
262120
272120
282120
292120
302120

Angra do Heroísmo weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan16° / 15°7911.59.64.7
Feb15° / 14°6510.510.54.5
Mar15° / 14°7610.911.74.5
Apr16° / 14°609.7134.8
May17° / 16°517.814.15.7
Jun19° / 18°386.114.66.7
Jul21° / 20°193.614.47.7
Aug22° / 21°275.213.57.7
Sep22° / 21°458.312.36.9
Oct20° / 19°8711.9116.0
Nov18° / 17°679.69.95.7
Dec17° / 15°11913.99.34.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 23% of September, with mostly cloudy or overcast conditions the remaining 43%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16634
26535
36436
46436
56238
66238
76040
85941
95842
105743
115644
125644
135545
145545
155545
165545
175545
185545
195545
205545
215545
225545
235644
245644
255644
265644
275644
285545
295545
305446

Chance of precipitation in September

Any precipitation

Angra do Heroísmo gets around 45 mm of rain over 8.3 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 28% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
124
225
325
426
526
627
728
828
929
1029
1129
1230
1330
1430
1529
1629
1729
1829
1928
2028
2128
2228
2328
2428
2528
2628
2728
2828
2929
3029

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 40% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
121237428
221237417
321336417
421436417
531535416
631635416
731634416
831734415
941833405
1041933405
1141932405
1242032394
1352132384
1452133374
1552233364
1652333354
1752433344
1862433334
1962533333
2062534323
2162634323
2262634313
2362734313
2462735302
2562735302
2662835292
2762835292
2872835291
2972835291
3072835291

Wind in September

Winds average 22 km/h in September.

Across September, daily wind ranges from about 20 km/h on the calmest days to 24 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
120breezy
220breezy
320breezy
421breezy
521breezy
621breezy
721breezy
821breezy
922breezy
1022breezy
1122breezy
1222breezy
1322breezy
1422breezy
1522breezy
1622breezy
1723breezy
1823breezy
1923breezy
2023breezy
2123breezy
2223breezy
2323breezy
2423breezy
2523breezy
2623breezy
2723breezy
2824breezy
2924breezy
3024breezy

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 6:22 AM to 6:49 AM, and sunset from 7:15 PM to 6:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:227:15
212.86:237:13
312.86:247:12
412.86:257:10
512.76:267:09
612.76:277:07
712.66:287:05
812.66:287:04
912.56:297:02
1012.56:307:01
1112.56:316:59
1212.46:326:57
1312.46:336:56
1412.36:346:54
1512.36:356:52
1612.26:366:51
1712.26:376:49
1812.26:386:47
1912.16:396:46
2012.16:396:44
2112.06:406:42
2212.06:416:41
2311.96:426:39
2411.96:436:37
2511.96:446:36
2611.86:456:34
2711.86:466:32
2811.76:476:31
2911.76:486:29
3011.66:496:28

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.75 kWh/m².

For context, solar energy here swings from a low near 1.75 kWh/m² to a high of 6.64 kWh/m² in July across the year — September's 4.75 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.3Bright
35.3Bright
45.2Bright
55.2Bright
65.1Bright
75.1Bright
85.0Bright
95.0Bright
104.9Bright
114.9Bright
124.8Bright
134.8Bright
144.8Bright
154.7Bright
164.7Bright
174.7Bright
184.6Bright
194.6Bright
204.5Bright
214.5Bright
224.5Bright
234.4Bright
244.4Bright
254.3Bright
264.3Bright
274.3Bright
284.2Bright
294.1Bright
304.1Bright
Planning a trip in September

Hazard calendar for Angra do Heroísmo

In seasonPeak

In September, Angra do Heroísmo sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Angra do Heroísmo sits in the Atlantic hurricane belt; the season peaks August–October.

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

Is September a good time to visit Angra do Heroísmo?

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

6.9
Sightseeing
3rd-best month of the year
4.7
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Angra do Heroísmo for sightseeing.

What to pack for Angra do Heroísmo in September

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

In September, Angra do Heroísmo sees daytime highs around 22°C and nights near 21°C. Worth packing: rain gear, sun protection and a windbreaker. About 8 days see rain.

rain gearsun protectiona windbreaker

Sea temperature near Angra do Heroísmo in September

The nearest coast averages about 22°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 23°C and coldest in March near 16°C.

It's comfortable for a long swim from Jun 29 to Oct 27 — about 4 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb16Cool
Mar16Cool
Apr16Cool
May17Cool
Jun19Cool
Jul21Refreshing
Aug23Refreshing
Sep22Refreshing
Oct21Refreshing
Nov19Cool
Dec17Cool

UV index in Angra do Heroísmo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Angra do Heroísmo peaks around August 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateAug 10UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb4Moderate
Mar5High
Apr6High
May9Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep7High
Oct5Moderate
Nov3Moderate
Dec2Low
Location & terrain

Where is Angra do Heroísmo?

Angra do Heroísmo sits at 38.7°N, 27.2°W, 0 m above sea level, in Portugal. The nearest listed city is Ponta Delgada, 169 km away.

Ponta DelgadaCâmara de LobosSanto AntónioFunchalSão MartinhoCaniço

Topography around Angra do Heroísmo

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

Within 3 km, the terrain around Angra do Heroísmo has significant variations in elevation — a maximum elevation change of 294 m around an average of 65 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,026 m; within 80 km, large variations in elevation — a maximum elevation change of 1,019 m.

The land around Angra do Heroísmo is covered by water (46%) and trees (21%) within 3 km, water (55%) and grassland (22%) within 16 km, and water (94%) within 80 km.

3 km
294 m
16 km
1,026 m
80 km
1,019 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Ponta Delgada 169 km · Câmara de Lobos 1,140 km · Santo António 1,142 km · Funchal 1,143 km · São Martinho 1,143 km · Caniço 1,150 km · Los Llanos de Aridane 1,404 km · Santa Cruz de la Palma 1,411 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 Angra do Heroísmo (38.6539°, -27.2184°, elevation 0 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).