Ariquemes in Spring

In spring (September, October and November), Ariquemes sees average daytime highs around 33°C and overnight lows near 23°C, with 436 mm of rain over about 57 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.

Over the season highs ease from about 34°C in early September to 31°C by late November. The sky is clear or mostly clear about 14% of the time across spring, and the air most often feels oppressive.

Spring is Ariquemes's 3rd-best season to visit on our travel score. For the whole year in context, see Ariquemes's year-round climate.

Avg daytime high: 33°C; 2nd-warmest season
Avg overnight low: 23°C
Rainfall: 436 mm; 57 wet days
Avg wind: 5 km/h
Travel score: 2.8; 3rd-best season
Months: Sep · Oct · Nov

← Winter Ariquemes year-round climate Summer →

Spring Summer Fall Winter

Temperature in Ariquemes in Spring

Average highAverage lowShaded bands: 10–90% of days

Over the season highs ease from about 34°C in early September to 31°C by late November.

A typical spring day in Ariquemes reaches about 33°C and drops to 23°C overnight. The warmest of the three months is September, the coolest September.

How spring really feels in Ariquemes

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.

Ariquemes 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	30° / 23°	282	27.6	12.5	2.8
Feb	30° / 23°	279	26	12.3	2.7
Mar	30° / 23°	274	28.2	12.1	2.7
Apr	30° / 23°	185	23.8	11.8	3.1
May	30° / 22°	91	15.8	11.6	4.1
Jun	32° / 21°	20	4.4	11.4	4.9
Jul	33° / 21°	13	2.5	11.5	4.3
Aug	34° / 21°	32	5.4	11.7	3.3
Sep	34° / 23°	86	14	11.9	2.8
Oct	33° / 23°	142	20.2	12.2	2.7
Nov	31° / 23°	208	23.2	12.5	2.8
Dec	30° / 23°	246	26.8	12.6	2.8

Cloud cover in Spring

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time across spring.

Chance of precipitation in Spring

Any precipitation

Ariquemes gets around 436 mm of rain over 57 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 5 km/h across spring.

Sunrise & sunset in Spring

DaylightNight

Daylight runs from about 11 h 48 min in early September to 12 h 30 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 5.4 kWh/m².

Planning a trip in spring

Hazard calendar for Ariquemes

In seasonPeak

In spring, Ariquemes overlaps its rainy season season. The full year is below, with each hazard's peak months called out.

Ariquemes's rainy season runs October–April, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is spring a good time to visit Ariquemes?

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.

2.8

Sightseeing

3rd-best month of the year

4.8

Beach & pool

2nd-best month of the year

spring is a weaker month for outdoor sightseeing in Ariquemes.

What to pack for Ariquemes in Spring

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

In spring, Ariquemes sees daytime highs around 33°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 57 days see rain.

light clothesrain gearsun protection

UV index in Ariquemes in Spring

LowModerateHighVery highExtreme

Clear-sky midday UV across spring averages around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ariquemes peaks around March 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 13 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	15	15	15	13	10	9	9	6	3	11	13	14
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	High	Moderate	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	15	Extreme
Feb	15	Extreme
Mar	15	Extreme
Apr	13	Extreme
May	10	Extreme
Jun	9	Very high
Jul	9	Very high
Aug	6	High
Sep	3	Moderate
Oct	11	Extreme
Nov	13	Extreme
Dec	14	Extreme

Air quality in Ariquemes 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 Ariquemes is worst in September — around 101 µg/m³ PM2.5 (unhealthy), about 10.3× the cleanest month (May, 10 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)	13	12	14	11	10	11	15	68	101	41	21	15
Level	Moderate	Moderate	Moderate	Good	Good	Good	Moderate	Unhealthy	Unhealthy	Poor	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	13	Moderate
Feb	12	Moderate
Mar	14	Moderate
Apr	11	Good
May	10	Good
Jun	11	Good
Jul	15	Moderate
Aug	68	Unhealthy
Sep	101	Unhealthy
Oct	41	Poor
Nov	21	Moderate
Dec	15	Moderate

Location & terrain

Where is Ariquemes?

Ariquemes sits at 9.9°S, 63.0°W, 139 m above sea level, in Brazil. The nearest listed city is Alto Paraíso, 36 km away.

Topography around Ariquemes

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

Within 3 km, the terrain around Ariquemes has only modest variations in elevation — a maximum elevation change of 148 m around an average of 132 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 197 m; within 80 km, significant variations in elevation — a maximum elevation change of 443 m.

The land around Ariquemes is covered by artificial surfaces (56%), grassland (21%) and trees (20%) within 3 km, grassland (52%) and trees (41%) within 16 km, and grassland (56%) and trees (42%) within 80 km.

3 km

148 m

artificial surfaces 56%

16 km

197 m

grassland 52%

80 km

443 m

grassland 56%

treesgrasslandcroplandartificial surfacesbare terrainwater

← Winter Ariquemes year-round climate Summer →

Spring weather nearby: Alto Paraíso 36 km · Jaru 86 km · Buritis 92 km · Machadinho d'Oeste 127 km · Ouro Preto do Oeste 129 km · Candeias do Jamari 142 km · Porto Velho 159 km · Ji Paraná 161 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 Ariquemes (-9.9133°, -63.0408°, elevation 139 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.