Boiro weather in September

In September, Boiro sees average daytime highs of 22°C and overnight lows near 15°C, with 82 mm of rain across 8.6 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 23°C in the first days to 20°C by the end. The sky is clear or mostly clear about 40% of the time in September, and the air most often feels comfortable.

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 Boiro's 3rd-clearest and 12th-windiest month. For the whole year in context, see Boiro's year-round climate.

Daytime high
22°
3rd warmest
Overnight low
15°
10th coldest
Rainfall
82 mm
8.6 wet days
Daylight
12 h 18 min
7:21 AM – 7:38 PM
Cloud cover
50%
3rd clearest
Wind
14 km/h
12th windiest
Solar energy
4.49 kWh/m²
Travel score
6.9
out of 10

Boiro is human settlement in Boiro, A Coruña Province, Galicia, Spain.

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 23°C in the first days to 20°C by the end.

A typical September day in Boiro reaches about 22°C in the afternoon and slips back to 15°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 26°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12316
22316
32316
42316
52316
62316
72316
82216
92215
102215
112215
122215
132215
142215
152215
162215
172115
182115
192115
202115
212115
222115
232115
242114
252114
262114
272014
282014
292014
302014

Boiro 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
Jan13° / 19114.79.23.0
Feb13° / 12311.610.33.5
Mar15° / 13211.811.64.4
Apr16° / 10°12713.413.14.7
May18° / 12°11311.814.45.7
Jun21° / 14°60815.16.9
Jul23° / 16°365.414.87.9
Aug23° / 16°506.713.77.7
Sep22° / 15°828.612.36.9
Oct19° / 13°1921410.85.4
Nov15° / 10°19215.39.64.0
Dec13° / 187158.93.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% 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 42%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16634
26535
36535
46535
56535
66337
76337
86238
96139
106040
116040
125842
135842
145842
155743
165743
175743
185644
195545
205545
215545
225446
235446
245446
255347
265248
275248
285149
295248
305149

Chance of precipitation in September

Any precipitation

Boiro gets around 82 mm of rain over 8.6 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 34% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
121
221
321
422
522
623
724
825
925
1026
1127
1228
1329
1430
1531
1631
1732
1832
1932
2033
2133
2233
2333
2434
2534
2634
2734
2834
2934
3034

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

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11645362
21745362
31845362
41844361
51944361
62044351
72144351
82143351
92243341
102343341
112343331
122443321
132543311
142543311
152644301
162744281
172745271
182845261
192946250
202946240
213046240
223046230
233146230
243246220
253246220
263345210
273445210
283644200
293743200
303942190

Wind in September

Winds average 14 km/h in September, the calmest month.

Across September, daily wind ranges from about 14 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

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 7:05 AM to 7:37 AM, and sunset from 8:06 PM to 7:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.07:058:06
213.07:068:04
312.97:078:02
412.97:088:00
512.87:097:59
612.87:107:57
712.77:117:55
812.77:127:53
912.67:147:51
1012.67:157:49
1112.57:167:48
1212.57:177:46
1312.47:187:44
1412.47:197:42
1512.37:207:40
1612.37:217:38
1712.27:227:37
1812.27:247:35
1912.17:257:33
2012.17:267:31
2112.07:277:29
2212.07:287:27
2311.97:297:25
2411.97:307:24
2511.87:317:22
2611.87:337:20
2711.77:347:18
2811.77:357:16
2911.67:367:14
3011.67:377:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.49 kWh/m².

For context, solar energy here swings from a low near 1.42 kWh/m² to a high of 6.65 kWh/m² in June across the year — September's 4.49 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.1Bright
45.1Bright
55.0Bright
65.0Bright
75.0Bright
84.9Bright
94.8Bright
104.8Bright
114.7Bright
124.7Bright
134.6Bright
144.5Bright
154.5Bright
164.4Bright
174.4Bright
184.3Bright
194.3Bright
204.2Bright
214.2Bright
224.1Bright
234.0Bright
244.0Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.8Moderate
293.7Moderate
303.7Moderate
Planning a trip in September

Hazard calendar for Boiro

In seasonPeak

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

Boiro'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 Boiro?

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
4.6
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Boiro for sightseeing.

What to pack for Boiro in September

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

In September, Boiro sees daytime highs around 22°C and nights near 15°C. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Boiro 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 20 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
Jun16Cool
Jul17Cool
Aug17Cool
Sep17Cool
Oct16Cool
Nov16Cool
Dec14Bracing

UV index in Boiro 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 Boiro peaks around July 15 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 15UV 8Dec 22UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar5Moderate
Apr6High
May6High
Jun8Very high
Jul8Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Boiro?

Boiro sits at 42.6°N, 8.9°W, 29 m above sea level, in Spain. The nearest listed city is Vilagarcía de Arousa, 11 km away.

Topography around Boiro

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

Within 3 km, the terrain around Boiro has significant variations in elevation — a maximum elevation change of 255 m around an average of 57 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 685 m; within 80 km, large variations in elevation — a maximum elevation change of 1,141 m.

The land around Boiro is covered by trees (46%), water (22%) and grassland (21%) within 3 km, trees (42%) and water (32%) within 16 km, and trees (44%) and water (33%) within 80 km.

3 km
255 m
16 km
685 m
80 km
1,141 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Vilagarcía de Arousa 11 km · Santa Uxía de Ribeira 14 km · Poio 28 km · Sanxenxo 28 km · Pontevedra 31 km · Teo 32 km · Marín 32 km · A Estrada 33 km

Spain travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$38,627
2025
Happiness
6.5 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
3.9
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 540
Religion
Roman Catholic 58%atheist 16%agnostic 11%non-believer 11%

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 Boiro (42.6472°, -8.8846°, elevation 29 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).