Nova Iguaçu weather in January

In January, Nova Iguaçu sees average daytime highs of 31°C and overnight lows near 23°C, with 235 mm of rain across 20.1 wet days and about 13.2 hours of daylight. It is the 2nd-warmest and 1st-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 19% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 13 h 24 min at the start of January to 13 h 06 min by month's end. Set against the rest of the year, January is Nova Iguaçu's 10th-clearest and 8th-windiest month. For the whole year in context, see Nova Iguaçu's year-round climate.

Daytime high
31°
2nd warmest
Overnight low
23°
12th coldest
Rainfall
235 mm
20.1 wet days
Daylight
13 h 18 min
6:25 AM – 7:41 PM
Cloud cover
72%
10th clearest
Wind
6 km/h
8th windiest
Solar energy
5.78 kWh/m²
Travel score
3.3
out of 10

Nova Iguaçu is human settlement in Brazil.

Air quality
Moderate
PM10 42 µg/m³ · 2015

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

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

A typical January day in Nova Iguaçu reaches about 31°C in the afternoon and slips back to 23°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 35°C. Set against its neighbours, January runs about 1°C warmer than December and on par with February.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13123
23123
33123
43123
53123
63123
73123
83123
93123
103123
113123
123123
133123
143123
153123
163123
173123
183123
193123
203123
213123
223123
233123
243123
253123
263123
273123
283123
293223
303223
313223

How January really feels in Nova Iguaçu

Once humidity and wind are folded in, January averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Nova Iguaçu weather by month

How January compares with the rest of the year at a glance. January is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°23520.113.23.3
Feb32° / 23°16716.412.83.4
Mar30° / 22°17119.512.23.8
Apr29° / 20°8512.111.55.4
May26° / 18°589.910.96.7
Jun26° / 17°345.610.67.5
Jul26° / 16°346.110.77.6
Aug26° / 16°326.511.27.3
Sep27° / 18°669.911.96.5
Oct28° / 20°9612.812.55.5
Nov29° / 21°16517.713.14.5
Dec30° / 22°19219.413.43.8

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 12% of January, with mostly cloudy or overcast conditions the remaining 69%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12971
22971
32971
42971
52971
62971
72971
82971
93070
103070
113070
123070
133169
143169
153169
163169
173070
183070
193070
203169
213169
223169
233169
243169
253268
263268
273466
283466
293565
303664
313565

Chance of precipitation in January

Any precipitation

Nova Iguaçu gets around 235 mm of rain over 20.1 wet days in January, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 65% and peaks near 68% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
168
267
367
467
566
666
766
866
965
1065
1165
1265
1365
1465
1565
1666
1766
1866
1966
2066
2165
2265
2365
2464
2563
2663
2762
2862
2961
3061
3160

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the oppressive band about 73% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1223732
2123742
3123742
4123742
5122752
6123742
7123742
8123742
9123742
10123742
11124732
12124732
13124732
14124732
15124723
16124723
17124723
18124723
19124714
20124714
21123724
22123715
23123715
24122725
25122725
26121735
27121735
28120745
29120745
30120745
31119755

Wind in January

Winds average 6 km/h in January.

Across January, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 13 h 24 min at the start of January to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over January. Sunrise moves from 6:16 AM to 6:36 AM, and sunset from 7:38 PM to 7:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.46:167:38
213.46:167:38
313.46:177:39
413.46:187:39
513.46:187:39
613.36:197:40
713.36:197:40
813.36:207:40
913.36:217:40
1013.36:217:40
1113.36:227:40
1213.36:237:41
1313.36:237:41
1413.36:247:41
1513.36:257:41
1613.36:257:41
1713.26:267:41
1813.26:277:41
1913.26:277:41
2013.26:287:41
2113.26:297:41
2213.26:307:40
2313.26:307:40
2413.26:317:40
2513.16:327:40
2613.16:327:40
2713.16:337:40
2813.16:347:39
2913.16:347:39
3013.16:357:39
3113.16:367:39

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.78 kWh/m².

For context, solar energy here swings from a low near 3.33 kWh/m² to a high of 5.93 kWh/m² in February across the year — January's 5.78 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
306.0Bright
316.0Bright
Planning a trip in January

Hazard calendar for Nova Iguaçu

In seasonPeak

In January, Nova Iguaçu sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Nova Iguaçu's rainy season runs November–March, when most of the year's rain falls.

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

Is January a good time to visit Nova Iguaçu?

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

3.3
Sightseeing
12th-best month of the year
5.0
Beach & pool
12th-best month of the year

January is a weaker month for outdoor sightseeing in Nova Iguaçu.

What to pack for Nova Iguaçu in January

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

In January, Nova Iguaçu sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

Sea temperature near Nova Iguaçu in January

The nearest coast averages about 25°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 41 km away) is warmest in March at about 26°C and coldest in August near 21°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°22°24°26°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan25Warm
Feb25Warm
Mar26Warm
Apr25Warm
May24Refreshing
Jun23Refreshing
Jul22Refreshing
Aug21Refreshing
Sep21Refreshing
Oct22Refreshing
Nov22Refreshing
Dec24Warm

UV index in Nova Iguaçu in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nova Iguaçu peaks around January 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeJan 16UV 14Jul 13UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May6High
Jun6High
Jul5Moderate
Aug8Very high
Sep6High
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Nova Iguaçu in January

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Nova Iguaçu is worst in July — around 38 µg/m³ PM2.5 (poor), about 2.0× the cleanest month (December, 19 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateModerateJul 1237 µg/m³Dec 2319 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb19Moderate
Mar21Moderate
Apr24Moderate
May31Moderate
Jun36Poor
Jul38Poor
Aug32Moderate
Sep37Poor
Oct24Moderate
Nov20Moderate
Dec19Moderate
Location & terrain

Where is Nova Iguaçu?

Nova Iguaçu sits at 22.8°S, 43.5°W, 36 m above sea level, in Brazil. The nearest listed city is Belford Roxo, 5.0 km away.

Topography around Nova Iguaçu

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

Within 3 km, the terrain around Nova Iguaçu has significant variations in elevation — a maximum elevation change of 457 m around an average of 79 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 982 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,224 m.

The land around Nova Iguaçu is covered by artificial surfaces (65%) and trees (21%) within 3 km, trees (40%) and artificial surfaces (40%) within 16 km, and trees (37%), water (29%) and grassland (26%) within 80 km.

3 km
457 m
16 km
982 m
80 km
2,224 m
treesgrasslandartificial surfaceswaterwetlandmangroves
January weather nearby: Belford Roxo 5.0 km · Nilópolis 7.0 km · São João de Meriti 9.0 km · Queimados 12 km · Duque de Caxias 15 km · Japeri 24 km · Universidade Rural 25 km · Seropédica 26 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 Nova Iguaçu (-22.7592°, -43.4511°, elevation 36 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. 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).