Cairu weather in October

In October, Cairu sees average daytime highs of 27°C and overnight lows near 23°C, with 79 mm of rain across 17.8 wet days and about 12.3 hours of daylight. It is the 7th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 40% of the time in October, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of October to 12 h 30 min by month's end. Set against the rest of the year, October is Cairu's 2nd-clearest and 1st-windiest month. For the whole year in context, see Cairu's year-round climate.

Daytime high
27°
7th warmest
Overnight low
23°
5th coldest
Rainfall
79 mm
17.8 wet days
Daylight
12 h 18 min
5:12 AM – 5:30 PM
Cloud cover
51%
2nd clearest
Wind
13 km/h
1st windiest
Solar energy
5.8 kWh/m²
Travel score
5.5
out of 10

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical October day in Cairu reaches about 27°C in the afternoon and slips back to 23°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 28°C. Set against its neighbours, October runs about 1°C warmer than September and on par with November.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12722
22722
32722
42722
52722
62722
72722
82722
92722
102722
112722
122722
132722
142722
152723
162723
172723
182723
192723
202723
212723
222723
232723
242723
252723
262723
272723
282723
292723
302723
312823

How October really feels in Cairu

Once humidity and wind are folded in, October 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

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

Cairu weather by month

How October compares with the rest of the year at a glance. October is the 7th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 24°8719.412.74.5
Feb29° / 24°7719.712.44.2
Mar29° / 24°10622.212.14.1
Apr28° / 24°14123.611.74.2
May27° / 23°1492211.44.8
Jun26° / 22°15023.211.24.8
Jul25° / 21°13123.311.35.0
Aug25° / 21°10421.111.65.3
Sep26° / 22°8418.311.95.5
Oct27° / 23°7917.812.35.5
Nov28° / 23°991812.65.1
Dec28° / 24°7416.112.85.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 27% of October, with mostly cloudy or overcast conditions the remaining 32%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17327
27327
37327
47327
57327
67228
77228
87129
97129
107129
117129
127030
136931
146931
156832
166832
176733
186733
196733
206634
216634
226535
236535
246436
256436
266337
276238
286238
296139
306040
315941

Chance of precipitation in October

Any precipitation

Cairu gets around 79 mm of rain over 17.8 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 58% and peaks near 60% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
159
259
359
459
559
660
760
860
959
1059
1159
1259
1359
1459
1559
1659
1759
1858
1958
2058
2157
2257
2357
2456
2556
2656
2756
2856
2956
3056
3156

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the oppressive band about 62% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
134849
234750
334651
434552
524454
624355
724355
824256
924256
1024157
1124157
1224157
1324058
1424058
1523959
1623860
1713861
1813762
1913663
2013564
2113366
2213267
2313069
2412970
2512772
2612673
2712574
2812475
2912376
3012277
3112178

Wind in October

Winds average 13 km/h in October, the windiest month of the year.

Across October, 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.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light 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
3113light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 12 h 06 min at the start of October to 12 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over October. Sunrise moves from 5:22 AM to 5:05 AM, and sunset from 5:29 PM to 5:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.15:225:29
212.15:215:29
312.15:205:29
412.25:195:29
512.25:195:29
612.25:185:29
712.25:175:29
812.25:175:29
912.25:165:29
1012.25:165:30
1112.25:155:30
1212.35:145:30
1312.35:145:30
1412.35:135:30
1512.35:135:30
1612.35:125:30
1712.35:115:31
1812.35:115:31
1912.35:105:31
2012.45:105:31
2112.45:095:31
2212.45:095:32
2312.45:085:32
2412.45:085:32
2512.45:085:32
2612.45:075:33
2712.45:075:33
2812.45:065:33
2912.55:065:33
3012.55:065:34
3112.55:055:34

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 5.8 kWh/m².

For context, solar energy here swings from a low near 3.71 kWh/m² to a high of 6.24 kWh/m² in January across the year — October's 5.8 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in October

Is October a good time to visit Cairu?

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

5.5
Sightseeing
1st-best month of the year
5.6
Beach & pool
2nd-best month of the year

October is a reasonable time to visit Cairu for sightseeing.

What to pack for Cairu in October

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

In October, Cairu sees daytime highs around 27°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

Sea temperature near Cairu in October

The nearest coast averages about 26°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 22 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
Jan28Warm
Feb28Tropical
Mar28Tropical
Apr28Tropical
May27Warm
Jun26Warm
Jul26Warm
Aug25Warm
Sep26Warm
Oct26Warm
Nov27Warm
Dec27Warm

UV index in Cairu in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cairu peaks around February 19 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 19UV 15Jun 22UV 8
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep11Extreme
Oct13Extreme
Nov13Extreme
Dec12Extreme
Location & terrain

Where is Cairu?

Cairu sits at 13.5°S, 39.0°W, 17 m above sea level, in Brazil. The nearest listed city is Taperoá, 8.0 km away.

Topography around Cairu

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

Within 3 km, the terrain around Cairu has only modest variations in elevation — a maximum elevation change of 55 m around an average of 9 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 212 m; within 80 km, large variations in elevation — a maximum elevation change of 898 m.

The land around Cairu is covered by mangroves (33%), trees (32%) and water (31%) within 3 km, trees (59%) within 16 km, and trees (48%) and water (32%) within 80 km.

3 km
55 m
16 km
212 m
80 km
898 m
treesgrasslandartificial surfaceswaterwetlandmangroves
October weather nearby: Taperoá 8.0 km · Valença 13 km · Ituberá 30 km · Presidente Tancredo Neves 41 km · Jaguaripe 45 km · Teolândia 50 km · Nazaré 50 km · Camamu 52 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 Cairu (-13.4869°, -39.0439°, elevation 17 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).