Una weather in September

In September, Una sees average daytime highs of 26°C and overnight lows near 21°C, with 67 mm of rain across 15.4 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 37% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Una's 2nd-clearest and 3rd-windiest month. For the whole year in context, see Una's year-round climate.

Daytime high
26°
9th warmest
Overnight low
21°
3rd coldest
Rainfall
67 mm
15.4 wet days
Daylight
11 h 54 min
5:33 AM – 5:28 PM
Cloud cover
50%
2nd clearest
Wind
13 km/h
3rd windiest
Solar energy
5.25 kWh/m²
Travel score
6.0
out of 10

Una is human settlement in Brazil.

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 26°C through the month.

A typical September day in Una reaches about 26°C in the afternoon and slips back to 21°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 27°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12520
22620
32620
42620
52620
62621
72621
82621
92621
102621
112621
122621
132621
142621
152621
162621
172621
182621
192621
202621
212621
222621
232621
242621
252621
262621
272621
282621
292622
302622

How September really feels in Una

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.

Una weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 24°10219.312.84.6
Feb29° / 24°8818.712.54.4
Mar29° / 24°12622.212.14.2
Apr28° / 23°13421.711.74.5
May27° / 22°11619.211.35.3
Jun26° / 21°9918.611.15.5
Jul25° / 20°972011.25.5
Aug25° / 20°7217.911.55.8
Sep26° / 21°6715.411.96.0
Oct27° / 22°10416.812.35.6
Nov27° / 23°16118.812.75.0
Dec28° / 23°12317.712.95.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 35% of September, with mostly cloudy or overcast conditions the remaining 28%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17327
27327
37327
47327
57327
67327
77327
87327
97426
107327
117327
127426
137426
147426
157426
167327
177426
187327
197327
207228
217228
227129
237030
247030
256931
266832
276832
286832
296634
306634

Chance of precipitation in September

Any precipitation

Una gets around 67 mm of rain over 15.4 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 51% and peaks near 52% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
152
252
352
452
552
651
751
851
951
1051
1151
1251
1351
1451
1551
1651
1751
1852
1952
2052
2152
2252
2352
2452
2551
2651
2751
2851
2951
3051

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 69% of days. Sticky, muggy-or-worse air turns up on roughly 88% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11167211
21167211
31167211
41167112
51167112
61167112
71167013
81157113
91157113
101157014
111147114
121137115
131137115
140127216
150117217
160107218
170107119
18097120
19097021
20096922
21086923
22086824
23086725
24086527
25086428
26076429
27076231
28076132
29076033
30075835

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over September. Sunrise moves from 5:45 AM to 5:22 AM, and sunset from 5:27 PM to 5:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.75:455:27
211.75:445:27
311.75:445:27
411.75:435:27
511.85:425:27
611.85:415:27
711.85:405:27
811.85:405:28
911.85:395:28
1011.85:385:28
1111.85:375:28
1211.95:365:28
1311.95:365:28
1411.95:355:28
1511.95:345:28
1611.95:335:28
1711.95:325:28
1811.95:325:28
1912.05:315:28
2012.05:305:28
2112.05:295:28
2212.05:285:29
2312.05:275:29
2412.05:275:29
2512.05:265:29
2612.15:255:29
2712.15:245:29
2812.15:245:29
2912.15:235:29
3012.15:225:29

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 3.79 kWh/m² to a high of 6.33 kWh/m² in January across the year — September's 5.25 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.1Bright
75.1Bright
85.1Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.4Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Is September a good time to visit Una?

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

6.0
Sightseeing
1st-best month of the year
5.7
Beach & pool
1st-best month of the year

September is a reasonable time to visit Una for sightseeing.

What to pack for Una in September

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

In September, Una sees daytime highs around 26°C and nights near 21°C. Pack rain gear. Worth having: light clothes and sun protection. About 15 days see rain.

rain gearlight clothessun protection

Sea temperature near Una in September

The nearest coast averages about 25°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 23 km away) is warmest in March at about 28°C and coldest in August near 25°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb28Warm
Mar28Tropical
Apr28Tropical
May27Warm
Jun26Warm
Jul26Warm
Aug25Warm
Sep25Warm
Oct26Warm
Nov26Warm
Dec27Warm

UV index in Una in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Una peaks around February 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 18UV 15Jun 22UV 8
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep11Extreme
Oct12Extreme
Nov14Extreme
Dec13Extreme
Location & terrain

Where is Una?

Una sits at 15.3°S, 39.1°W, 16 m above sea level, in Brazil. The nearest listed city is Canavieiras, 45 km away.

Topography around Una

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

Within 3 km, the terrain around Una has only modest variations in elevation — a maximum elevation change of 102 m around an average of 43 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 299 m; within 80 km, large variations in elevation — a maximum elevation change of 1,130 m.

The land around Una is covered by trees (91%) within 3 km, trees (72%) within 16 km, and trees (47%), water (30%) and grassland (21%) within 80 km.

3 km
102 m
16 km
299 m
80 km
1,130 m
treesgrasslandartificial surfaceswaterwetlandmangroves
September weather nearby: Canavieiras 45 km · Camacan 47 km · Ilhéus 55 km · Itabuna 61 km · Belmonte 67 km · Ibicaraí 73 km · Itajuípe 76 km · Uruçuca 81 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 Una (-15.2933°, -39.0753°, elevation 16 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).