Formosa weather in October

In October, Formosa sees average daytime highs of 31°C and overnight lows near 20°C, with 103 mm of rain across 11.6 wet days and about 12.4 hours of daylight. It is the 2nd-warmest and 6th-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 34% of the time in October, and the air most often feels humid.

Daylight stretches from about 12 h 06 min at the start of October to 12 h 36 min by month's end. Set against the rest of the year, October is Formosa's 7th-clearest and 5th-windiest month. For the whole year in context, see Formosa's year-round climate.

Daytime high
31°
2nd warmest
Overnight low
20°
12th coldest
Rainfall
103 mm
11.6 wet days
Daylight
12 h 24 min
6:44 AM – 7:05 PM
Cloud cover
57%
7th clearest
Wind
8 km/h
5th windiest
Solar energy
6.21 kWh/m²
Travel score
4.4
out of 10

Formosa is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical October day in Formosa reaches about 31°C in the afternoon and slips back to 20°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 34°C. Set against its neighbours, October runs on par with September and about 2°C warmer than November.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13120
23120
33120
43120
53120
63120
73120
83120
93120
103120
113120
123120
133120
143120
153120
163120
173120
183120
193120
203120
213120
223120
233120
243120
253020
263020
273020
283020
293020
303020
313020

Formosa weather by month

How October compares with the rest of the year at a glance. October is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 20°20218.612.84.5
Feb29° / 20°15916.512.54.5
Mar29° / 20°17418.312.14.6
Apr29° / 19°691011.75.7
May28° / 17°15311.37.3
Jun27° / 16°40.611.18.3
Jul28° / 15°0011.28.5
Aug29° / 17°41.111.57.1
Sep31° / 19°233.811.95.3
Oct31° / 20°10311.612.44.4
Nov29° / 20°21820.812.74.1
Dec28° / 20°24420.612.94.3

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 16% of October, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
25941
35941
45941
55842
65842
75941
85842
95842
105941
115842
125743
135842
145743
155644
165545
175446
185347
195149
204951
214852
224654
234456
244159
254060
263862
273664
283466
293367
303268
313169

Chance of precipitation in October

Any precipitation

Formosa gets around 103 mm of rain over 11.6 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 37% and peaks near 54% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
127
227
328
429
529
629
730
830
931
1031
1132
1232
1333
1433
1534
1635
1735
1836
1937
2038
2140
2241
2343
2444
2546
2647
2749
2850
2952
3053
3154

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the humid band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 27% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
128293014
227283114
327283115
427273115
527263215
627263216
727253116
828253117
928243018
1028242918
1129242919
1229232820
1329232821
1428222822
1528222822
1627222823
1726222825
1825212826
1924212827
2022212829
2121212831
2219202833
2317202835
2416202837
2514192839
2612192841
2711192843
289182844
298182846
307182847
316172849

Wind in October

Winds average 8 km/h in October.

Across October, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 12 h 06 min at the start of October to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over October. Sunrise moves from 6:54 AM to 6:36 AM, and sunset from 7:02 PM to 7:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:547:02
212.26:537:03
312.26:537:03
412.26:527:03
512.26:517:03
612.26:507:03
712.26:507:03
812.26:497:03
912.36:487:04
1012.36:487:04
1112.36:477:04
1212.36:467:04
1312.36:467:04
1412.36:457:05
1512.36:447:05
1612.46:447:05
1712.46:437:05
1812.46:437:06
1912.46:427:06
2012.46:417:06
2112.46:417:06
2212.46:407:07
2312.56:407:07
2412.56:397:07
2512.56:397:07
2612.56:387:08
2712.56:387:08
2812.56:377:08
2912.56:377:09
3012.56:377:09
3112.66:367:10

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 6.21 kWh/m².

For context, solar energy here swings from a low near 4.62 kWh/m² to a high of 6.24 kWh/m² in September across the year — October's 6.21 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.2Intense
196.2Intense
206.2Intense
216.1Intense
226.1Intense
236.1Intense
246.0Intense
256.0Bright
266.0Bright
275.9Bright
285.9Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in October

Hazard calendar for Formosa

In seasonPeak

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

Formosa's monsoon runs November–March, when most of the year's rain falls.

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

Is October a good time to visit Formosa?

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

4.4
Sightseeing
10th-best month of the year
6.4
Beach & pool
7th-best month of the year

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

What to pack for Formosa in October

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

In October, Formosa sees daytime highs around 31°C and nights near 20°C. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.

light clothessun protectionrain gear

UV index in Formosa 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 Formosa peaks around February 15 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 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 15UV 16Jul 10UV 8
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar15Extreme
Apr12Extreme
May10Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov14Extreme
Dec13Extreme

Air quality in Formosa in October

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.

Air quality in Formosa is worst in September — around 24 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (July, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1923 µg/m³Jul 127 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar10Good
Apr10Good
May9Good
Jun8Good
Jul7Good
Aug10Good
Sep24Moderate
Oct17Moderate
Nov9Good
Dec9Good
Location & terrain

Where is Formosa?

Formosa sits at 15.5°S, 47.3°W, 915 m above sea level, in Brazil. The nearest listed city is Planaltina, 31 km away.

Topography around Formosa

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

Within 3 km, the terrain around Formosa has only modest variations in elevation — a maximum elevation change of 176 m around an average of 917 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 610 m; within 80 km, large variations in elevation — a maximum elevation change of 848 m.

The land around Formosa is covered by artificial surfaces (47%) and grassland (25%) within 3 km, grassland (34%), trees (24%) and cropland (20%) within 16 km, and grassland (34%), trees (23%) and cropland (22%) within 80 km.

3 km
176 m
16 km
610 m
80 km
848 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Planaltina 31 km · Planaltina 35 km · Sobradinho 51 km · Itapoã 52 km · Sobradinho II 55 km · Paranoá 55 km · Lago Norte 60 km · São Sebastião 62 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 Formosa (-15.5372°, -47.3344°, elevation 915 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).