Ulianópolis in Spring

In spring (September, October and November), Ulianópolis sees average daytime highs around 34°C and overnight lows near 24°C, with 102 mm of rain over about 18 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.

Across spring, daytime highs hold fairly steady around 34°C. The sky is clear or mostly clear about 32% of the time across spring, and the air most often feels oppressive.

Spring is Ulianópolis's 2nd-best season to visit on our travel score. For the whole year in context, see Ulianópolis's year-round climate.

Avg daytime high: 34°C; warmest season of the year
Avg overnight low: 24°C
Rainfall: 102 mm; 18 wet days
Avg wind: 9 km/h
Travel score: 3.1; 2nd-best season
Months: Sep · Oct · Nov

← Winter Ulianópolis year-round climate Summer →

Spring Summer Fall Winter

Temperature in Ulianópolis in Spring

Average highAverage lowShaded bands: 10–90% of days

Across spring, daytime highs hold fairly steady around 34°C.

A typical spring day in Ulianópolis reaches about 34°C and drops to 24°C overnight. The warmest of the three months is September, the coolest September.

How spring really feels in Ulianópolis

Once humidity and wind are folded in, spring brings about 91 days that feel above 32°C and 0 that feel at or below 0°C.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

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

Ulianópolis weather by month

How the three spring months (September, October and November) compare with the rest of the year — the season's months are highlighted.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	31° / 23°	239	25.8	12.2	2.7
Feb	30° / 23°	273	25.7	12.1	2.7
Mar	30° / 23°	348	29.2	12	2.6
Apr	30° / 23°	247	27	11.9	2.7
May	31° / 23°	131	19.6	11.8	3.4
Jun	32° / 22°	32	7.4	11.8	4.3
Jul	33° / 22°	16	3.6	11.8	3.9
Aug	35° / 22°	6	1.1	11.9	3.4
Sep	35° / 23°	11	2	12	3.2
Oct	35° / 24°	25	5.6	12.1	3.0
Nov	34° / 24°	67	10.2	12.2	3.0
Dec	33° / 23°	129	16.8	12.2	3.0

Cloud cover in Spring

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time across spring.

Chance of precipitation in Spring

Any precipitation

Ulianópolis gets around 102 mm of rain over 18 wet days across spring. The line is the day-by-day chance of measurable precipitation.

Humidity in Spring

DryComfortableHumidMuggyOppressiveMiserable

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

Wind in Spring

Winds average 9 km/h across spring.

Sunrise & sunset in Spring

DaylightNight

Daylight runs from about 11 h 54 min in early September to 12 h 12 min by late November. The lit band spans sunrise to sunset each day.

Solar energy in Spring

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across spring, about 6.0 kWh/m².

Planning a trip in spring

Hazard calendar for Ulianópolis

In seasonPeak

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

Ulianópolis's monsoon runs January–April, when most of the year's rain falls.

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is spring a good time to visit Ulianópolis?

Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.

3.1

Sightseeing

2nd-best month of the year

6.3

Beach & pool

2nd-best month of the year

spring is a weaker month for outdoor sightseeing in Ulianópolis. The water and warmth also suit a beach or pool day.

What to pack for Ulianópolis in Spring

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

In spring, Ulianópolis sees daytime highs around 34°C and nights near 24°C. Pack light clothes and sun protection. Worth having: rain gear. About 18 days see rain.

light clothessun protectionrain gear

UV index in Ulianópolis in Spring

LowModerateHighVery highExtreme

Clear-sky midday UV across spring averages 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 Ulianópolis peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 17 at about 10 (extreme).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	13	14	15	14	11	10	10	10	12	12	11	10
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	13	Extreme
Feb	14	Extreme
Mar	15	Extreme
Apr	14	Extreme
May	11	Extreme
Jun	10	Extreme
Jul	10	Extreme
Aug	10	Extreme
Sep	12	Extreme
Oct	12	Extreme
Nov	11	Extreme
Dec	10	Extreme

Air quality in Ulianópolis in Spring

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Ulianópolis is worst in November — around 33 µg/m³ PM2.5 (moderate), about 3.7× the cleanest month (June, 9 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	16	16	15	12	10	9	11	13	16	21	33	30
Level	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	16	Moderate
Feb	16	Moderate
Mar	15	Moderate
Apr	12	Moderate
May	10	Good
Jun	9	Good
Jul	11	Good
Aug	13	Moderate
Sep	16	Moderate
Oct	21	Moderate
Nov	33	Moderate
Dec	30	Moderate

Location & terrain

Where is Ulianópolis?

Ulianópolis sits at 3.7°S, 47.5°W, 119 m above sea level, in Brazil. The nearest listed city is Dom Eliseu, 60 km away.

Topography around Ulianópolis

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

Within 3 km, the terrain around Ulianópolis has only modest variations in elevation — a maximum elevation change of 47 m around an average of 113 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 152 m; within 80 km, significant variations in elevation — a maximum elevation change of 304 m.

The land around Ulianópolis is covered by grassland (62%) and trees (26%) within 3 km, grassland (51%) and trees (48%) within 16 km, and trees (65%) and grassland (33%) within 80 km.

3 km

47 m

grassland 62%

16 km

152 m

grassland 51%

80 km

304 m

trees 65%

treesgrasslandcroplandartificial surfacesbare terrain

← Winter Ulianópolis year-round climate Summer →

Spring weather nearby: Dom Eliseu 60 km · Itinga do Maranhão 79 km · Paragominas 84 km · Bom Jesus das Selvas 109 km · Rondon do Pará 131 km · Ipixuna do Pará 132 km · Buriticupu 132 km · Açailândia 134 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

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 Ulianópolis (-3.7419°, -47.4947°, elevation 119 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.