Imperatriz in Spring

In spring (September, October and November), Imperatriz sees average daytime highs around 34°C and overnight lows near 24°C, with 149 mm of rain over about 23 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.

Over the season highs ease from about 35°C in early September to 32°C by late November. The sky is clear or mostly clear about 40% of the time across spring, and the air most often feels oppressive.

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

Avg daytime high: 34°C; 2nd-warmest season
Avg overnight low: 24°C
Rainfall: 149 mm; 23 wet days
Avg wind: 7 km/h
Travel score: 3.3; 3rd-best season
Months: Sep · Oct · Nov

← Winter Imperatriz year-round climate Summer →

Spring Summer Fall Winter

Temperature in Imperatriz in Spring

Average highAverage lowShaded bands: 10–90% of days

Over the season highs ease from about 35°C in early September to 32°C by late November.

A typical spring day in Imperatriz 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 Imperatriz

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.

Imperatriz 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°	207	26.1	12.3	2.9
Feb	30° / 23°	205	23.9	12.2	2.9
Mar	31° / 23°	212	26.4	12	2.9
Apr	31° / 23°	151	20.7	11.9	3.2
May	32° / 23°	74	11.8	11.8	4.0
Jun	33° / 22°	8	1.8	11.7	4.5
Jul	34° / 22°	6	1.1	11.7	4.1
Aug	35° / 22°	2	0.4	11.8	3.6
Sep	35° / 23°	10	2	12	3.3
Oct	34° / 24°	39	6.3	12.1	3.4
Nov	32° / 24°	100	14.2	12.3	3.3
Dec	31° / 23°	146	20.2	12.3	3.2

Cloud cover in Spring

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time across spring.

Chance of precipitation in Spring

Any precipitation

Imperatriz gets around 149 mm of rain over 23 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 7 km/h across spring.

Sunrise & sunset in Spring

DaylightNight

Daylight runs from about 11 h 54 min in early September to 12 h 18 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 Imperatriz

In seasonPeak

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

Imperatriz's monsoon runs November–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 Imperatriz?

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.

3.3

Sightseeing

3rd-best month of the year

6.3

Beach & pool

2nd-best month of the year

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

What to pack for Imperatriz in Spring

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

In spring, Imperatriz sees daytime highs around 34°C and nights near 24°C. Pack light clothes, rain gear and sun protection. About 23 days see rain.

light clothesrain gearsun protection

UV index in Imperatriz 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 Imperatriz peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 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	15	15	14	11	10	10	11	12	12	11	10
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Extreme	Extreme	Extreme	Extreme	Extreme

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

Air quality in Imperatriz 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 Imperatriz is worst in October — around 29 µg/m³ PM2.5 (moderate), about 4.9× the cleanest month (June, 6 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)	14	13	13	12	9	6	7	12	23	29	29	20
Level	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	14	Moderate
Feb	13	Moderate
Mar	13	Moderate
Apr	12	Moderate
May	9	Good
Jun	6	Good
Jul	7	Good
Aug	12	Moderate
Sep	23	Moderate
Oct	29	Moderate
Nov	29	Moderate
Dec	20	Moderate

Location & terrain

Where is Imperatriz?

Imperatriz sits at 5.5°S, 47.5°W, 127 m above sea level, in Brazil. The nearest listed city is João Lisboa, 13 km away.

Topography around Imperatriz

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

Within 3 km, the terrain around Imperatriz has only modest variations in elevation — a maximum elevation change of 43 m around an average of 119 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 153 m; within 80 km, significant variations in elevation — a maximum elevation change of 438 m.

The land around Imperatriz is covered by artificial surfaces (46%), trees (21%) and grassland (20%) within 3 km, grassland (46%) and trees (44%) within 16 km, and grassland (54%) and trees (43%) within 80 km.

3 km

43 m

artificial surfaces 46%

16 km

153 m

grassland 46%

80 km

438 m

grassland 54%

treesshrubsgrasslandcroplandartificial surfaceswater

← Winter Imperatriz year-round climate Summer →

Spring weather nearby: João Lisboa 13 km · Governador Edison Lobão 28 km · Açailândia 64 km · Araguatins 70 km · Amarante do Maranhão 83 km · Tocantinópolis 90 km · Porto Franco 91 km · Sítio Novo 96 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 Imperatriz (-5.5264°, -47.4917°, elevation 127 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.