Caucaia weather in September

In September, Caucaia sees average daytime highs of 31°C and overnight lows near 24°C, with 2 mm of rain across 0.2 wet days and about 12 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 85% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Caucaia's 1st-clearest and 1st-windiest month. For the whole year in context, see Caucaia's year-round climate.

Daytime high
31°
2nd warmest
Overnight low
24°
4th coldest
Rainfall
2 mm
0.2 wet days
Daylight
12 hours
5:30 AM – 5:28 PM
Cloud cover
22%
1st clearest
Wind
21 km/h
1st windiest
Solar energy
6.69 kWh/m²
Travel score
5.8
out of 10

Caucaia 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 31°C through the month.

A typical September day in Caucaia reaches about 31°C in the afternoon and slips back to 24°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 32°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13124
23124
33124
43124
53124
63124
73124
83124
93124
103124
113124
123124
133124
143124
153124
163124
173124
183124
193124
203124
213124
223124
233124
243124
253124
263124
273124
283124
293125
303125

How September really feels in Caucaia

Once humidity and wind are folded in, September averages 30 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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Caucaia weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 25°8014.512.24.2
Feb30° / 25°11818.312.13.8
Mar30° / 24°17123.9123.5
Apr29° / 24°20923.711.93.5
May30° / 24°9516.511.84.4
Jun30° / 24°449.711.85.3
Jul30° / 24°214.611.85.7
Aug31° / 24°4111.95.8
Sep31° / 24°20.2125.8
Oct31° / 25°30.612.15.6
Nov31° / 25°41.312.25.4
Dec31° / 25°205.412.25.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 85% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 5%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1955
2955
3955
4955
5955
6955
7955
8955
9955
10955
11955
12955
13955
14955
15964
16964
17964
18964
19964
20964
21964
22964
23964
24964
25964
26964
27955
28955
29955
30946

Chance of precipitation in September

Any precipitation

Caucaia gets around 2 mm of rain over 0.2 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 1% and peaks near 2% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
12
22
31
41
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
251
261
271
281
291
301

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 66% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
117227
217227
317326
417326
517326
617326
717326
817326
917227
1017227
1117128
1217128
1317029
1416930
1516831
1616732
1706733
1806634
1906535
2006436
2106238
2206139
2306040
2406040
2505941
2605842
2705743
2805644
2905545
3005446

Wind in September

Winds average 21 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 21 km/h on the calmest days to 21 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
121breezy
221breezy
321breezy
421breezy
521breezy
621breezy
721breezy
821breezy
921breezy
1021breezy
1121breezy
1221breezy
1321breezy
1421breezy
1521breezy
1621breezy
1721breezy
1821breezy
1921breezy
2021breezy
2121breezy
2221breezy
2321breezy
2421breezy
2521breezy
2621breezy
2721breezy
2821breezy
2921breezy
3021breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over September. Sunrise moves from 5:36 AM to 5:23 AM, and sunset from 5:32 PM to 5:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:365:32
211.95:365:32
311.95:365:32
411.95:355:31
511.95:355:31
611.95:345:31
711.95:345:31
812.05:335:30
912.05:335:30
1012.05:325:30
1112.05:325:30
1212.05:315:29
1312.05:315:29
1412.05:305:29
1512.05:305:29
1612.05:305:28
1712.05:295:28
1812.05:295:28
1912.05:285:28
2012.05:285:27
2112.05:275:27
2212.05:275:27
2312.05:265:26
2412.05:265:26
2512.05:255:26
2612.05:255:26
2712.05:245:25
2812.05:245:25
2912.05:235:25
3012.05:235:25

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.69 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.71 kWh/m² to a high of 6.69 kWh/m² in September across the year — September's 6.69 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.6Intense
56.6Intense
66.6Intense
76.6Intense
86.6Intense
96.6Intense
106.7Intense
116.7Intense
126.7Intense
136.7Intense
146.7Intense
156.7Intense
166.7Intense
176.7Intense
186.7Intense
196.7Intense
206.7Intense
216.7Intense
226.7Intense
236.7Intense
246.7Intense
256.8Intense
266.8Intense
276.8Intense
286.8Intense
296.8Intense
306.8Intense
Planning a trip in September

Hazard calendar for Caucaia

In seasonPeak

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

Caucaia's monsoon runs February–May, when most of the year's rain falls.

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

Is September a good time to visit Caucaia?

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

5.8
Sightseeing
1st-best month of the year
8.7
Beach & pool
1st-best month of the year

September is a reasonable time to visit Caucaia for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Caucaia in September

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

In September, Caucaia sees daytime highs around 31°C and nights near 24°C. Pack light clothes and sun protection. Worth having: a windbreaker.

light clothessun protectiona windbreaker

Sea temperature near Caucaia in September

The nearest coast averages about 27°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 13 km away) is warmest in April at about 29°C and coldest in August near 27°C.

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

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb28Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Warm
Jul27Warm
Aug27Warm
Sep27Warm
Oct27Warm
Nov27Warm
Dec28Warm

UV index in Caucaia in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Caucaia peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 16UV 15Jun 23UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar16Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec11Extreme
Location & terrain

Where is Caucaia?

Caucaia sits at 3.7°S, 38.7°W, 35 m above sea level, in Brazil. The nearest listed city is Fortaleza, 12 km away.

Topography around Caucaia

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

Within 3 km, the terrain around Caucaia has only modest variations in elevation — a maximum elevation change of 35 m around an average of 14 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 642 m; within 80 km, large variations in elevation — a maximum elevation change of 1,081 m.

The land around Caucaia is covered by trees (31%), artificial surfaces (31%) and grassland (25%) within 3 km, trees (28%), water (25%) and artificial surfaces (23%) within 16 km, and water (35%), trees (22%) and shrubs (20%) within 80 km.

3 km
35 m
16 km
642 m
80 km
1,081 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Fortaleza 12 km · Maracanaú 16 km · Maranguape 18 km · Pacatuba 28 km · Eusébio 28 km · Itaitinga 29 km · Guaiúba 34 km · Aquiraz 34 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 Caucaia (-3.7361°, -38.6531°, elevation 35 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).