Fortim weather in September

In September, Fortim sees average daytime highs of 30°C and overnight lows near 24°C, with 2 mm of rain across 0.5 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 30°C through the month. The sky is clear or mostly clear about 89% of the time in September, and the air most often feels oppressive.

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 Fortim's 1st-clearest and 1st-windiest month. For the whole year in context, see Fortim's year-round climate.

Daytime high
30°
2nd warmest
Overnight low
24°
3rd coldest
Rainfall
2 mm
0.5 wet days
Daylight
12 hours
5:26 AM – 5:25 PM
Cloud cover
19%
1st clearest
Wind
26 km/h
1st windiest
Solar energy
6.84 kWh/m²
Travel score
7.0
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Fortim reaches about 30°C in the afternoon and slips back to 24°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 30°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)
13024
23024
33024
43024
53024
63024
73024
83024
93024
103024
113024
123024
133024
143024
153024
163024
173024
183024
193024
203024
213024
223024
233025
243025
253025
263025
273025
283025
293025
303025

How September really feels in Fortim

Once humidity and wind are folded in, September averages 20 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
20
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.

Fortim 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
Jan30° / 26°8615.112.24.7
Feb29° / 25°12017.312.14.3
Mar29° / 25°19622.7123.9
Apr29° / 25°21022.711.93.8
May30° / 25°10914.611.84.8
Jun29° / 25°579.811.75.6
Jul29° / 24°314.911.86.3
Aug30° / 24°40.911.96.8
Sep30° / 24°20.5127.0
Oct30° / 25°20.512.16.9
Nov30° / 26°41.112.26.6
Dec30° / 26°195.712.35.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 89% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 6% of September, with mostly cloudy or overcast conditions the remaining 4%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1955
2955
3955
4955
5955
6955
7955
8955
9955
10955
11955
12955
13955
14955
15955
16973
17973
18973
19973
20973
21973
22973
23964
24964
25964
26964
27964
28964
29955
30946

Chance of precipitation in September

Any precipitation

Fortim gets around 2 mm of rain over 0.5 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 2% and peaks near 2% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
12
22
31
41
51
61
72
82
92
102
112
122
132
142
152
162
172
182
192
202
212
222
232
241
251
261
271
281
291
301

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 52% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)
16040
26040
36040
46040
56040
66040
76040
85941
95941
105842
115644
125545
135446
145347
155149
164951
174852
184654
194456
204258
214159
224060
233862
243763
253664
263565
273466
283367
293268
303169

Wind in September

Winds average 26 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 25 km/h on the calmest days to 26 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
125breezy
226breezy
326breezy
426breezy
526breezy
626breezy
726breezy
826breezy
926breezy
1026breezy
1126breezy
1226breezy
1326breezy
1426breezy
1526breezy
1626breezy
1726breezy
1826breezy
1926breezy
2026breezy
2126breezy
2226breezy
2326breezy
2426breezy
2526breezy
2626breezy
2726breezy
2826breezy
2926breezy
3026breezy

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 5:33 AM to 5:19 AM, and sunset from 5:28 PM to 5:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:335:28
211.95:335:28
311.95:335:28
411.95:325:28
511.95:325:27
611.95:315:27
711.95:315:27
811.95:305:27
911.95:305:27
1012.05:295:26
1112.05:295:26
1212.05:285:26
1312.05:285:26
1412.05:275:25
1512.05:275:25
1612.05:265:25
1712.05:265:25
1812.05:255:24
1912.05:255:24
2012.05:245:24
2112.05:245:24
2212.05:235:23
2312.05:235:23
2412.05:225:23
2512.05:225:23
2612.05:215:22
2712.05:215:22
2812.05:205:22
2912.05:205:22
3012.05:195:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.84 kWh/m².

For context, solar energy here swings from a low near 5.12 kWh/m² to a high of 6.94 kWh/m² in October across the year — September's 6.84 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.6Intense
26.6Intense
36.6Intense
46.7Intense
56.7Intense
66.7Intense
76.7Intense
86.7Intense
96.7Intense
106.8Intense
116.8Intense
126.8Intense
136.8Intense
146.8Intense
156.8Intense
166.8Intense
176.9Intense
186.9Intense
196.9Intense
206.9Intense
216.9Intense
226.9Intense
236.9Intense
247.0Intense
257.0Intense
267.0Intense
277.0Intense
287.0Intense
297.0Intense
307.0Intense
Planning a trip in September

Hazard calendar for Fortim

In seasonPeak

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

Fortim'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 Fortim?

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

7.0
Sightseeing
1st-best month of the year
9.3
Beach & pool
1st-best month of the year

September is one of the better times to visit Fortim for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Fortim in September

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

In September, Fortim sees daytime highs around 30°C and nights near 24°C. Pack light clothes and sun protection. Worth having: a windbreaker.

light clothessun protectiona windbreaker

Sea temperature near Fortim 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 offshore 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
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Warm
Jul27Warm
Aug27Warm
Sep27Warm
Oct27Warm
Nov28Warm
Dec28Warm

UV index in Fortim 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 Fortim peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 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 15Jul 12UV 10
UV index (midday)Level
Jan12Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec11Extreme
Location & terrain

Where is Fortim?

Fortim sits at 4.5°S, 37.8°W, 24 m above sea level, in Brazil. The nearest listed city is Aracati, 13 km away.

Topography around Fortim

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

Within 3 km, the terrain around Fortim has only modest variations in elevation — a maximum elevation change of 38 m around an average of 18 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 79 m; within 80 km, significant variations in elevation — a maximum elevation change of 277 m.

The land around Fortim is covered by grassland (34%) and trees (23%) within 3 km, water (44%) and trees (26%) within 16 km, and water (34%), shrubs (30%) and grassland (21%) within 80 km.

3 km
38 m
16 km
79 m
80 km
277 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Aracati 13 km · Jaguaruana 43 km · Beberibe 48 km · Icapuí 57 km · Russas 58 km · Cascavel 61 km · Quixeré 72 km · Baraúna 73 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 Fortim (-4.4519°, -37.7972°, elevation 24 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).