Rosana weather in January

In January, Rosana sees average daytime highs of 31°C and overnight lows near 24°C, with 188 mm of rain across 19.7 wet days and about 13.2 hours of daylight. It is the 1st-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 22% 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 hours by month's end. Set against the rest of the year, January is Rosana's 12th-clearest and 10th-windiest month. For the whole year in context, see Rosana's year-round climate.

Daytime high
31°
1st warmest
Overnight low
24°
12th coldest
Rainfall
188 mm
19.7 wet days
Daylight
13 h 12 min
7:04 AM – 8:19 PM
Cloud cover
67%
12th clearest
Wind
8 km/h
10th windiest
Solar energy
5.88 kWh/m²
Travel score
3.4
out of 10

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 Rosana reaches about 31°C in the afternoon and slips back to 24°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 34°C. Set against its neighbours, January runs on par with December and on par with February.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13124
23124
33124
43124
53124
63124
73124
83124
93124
103124
113124
123124
133124
143124
153124
163124
173124
183124
193124
203124
213124
223124
233124
243124
253124
263124
273124
283124
293124
303124
313124

How January really feels in Rosana

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.

Rosana weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 24°18819.713.23.4
Feb31° / 23°16017.612.83.5
Mar31° / 23°12715.112.24.2
Apr29° / 21°697.611.55.9
May26° / 18°897.610.97.3
Jun25° / 17°596.110.67.8
Jul25° / 16°434.910.88.0
Aug27° / 17°434.411.27.7
Sep29° / 19°857.911.96.0
Oct30° / 21°13013.212.54.6
Nov31° / 22°13113.313.14.3
Dec31° / 23°16517.213.43.7

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in January, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of January, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
33862
43763
53763
63763
73763
83664
93664
103664
113763
123664
133664
143664
153763
163763
173763
183763
193763
203862
213862
223961
233961
244060
254060
264159
274258
284258
294258
304258
314456

Chance of precipitation in January

Any precipitation

Rosana gets around 188 mm of rain over 19.7 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 63% and peaks near 65% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
163
264
364
465
565
665
765
865
965
1064
1164
1264
1363
1463
1563
1662
1762
1861
1961
2061
2161
2261
2361
2462
2562
2662
2763
2863
2963
3063
3163

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 76% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1320752
2319762
3319753
4318763
5218773
6218773
7217783
8217783
9217783
10217783
11217783
12217783
13217783
14217783
15217783
16217783
17217783
18217783
19218773
20218773
21218773
22318754
23318754
24318754
25218764
26218764
27218764
28219754
29219754
30219754
31219754

Wind in January

Winds average 8 km/h in January.

Across January, daily wind ranges from about 8 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
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in January

DaylightNight

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

Days shrink by about 24 minutes over January. Sunrise moves from 6:55 AM to 7:14 AM, and sunset from 8:16 PM to 8:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.46:558:16
213.46:558:17
313.46:568:17
413.36:568:17
513.36:578:17
613.36:588:18
713.36:588:18
813.36:598:18
913.37:008:18
1013.37:008:18
1113.37:018:18
1213.37:028:19
1313.37:028:19
1413.37:038:19
1513.37:048:19
1613.27:048:19
1713.27:058:19
1813.27:068:19
1913.27:068:19
2013.27:078:19
2113.27:088:19
2213.27:088:19
2313.27:098:18
2413.17:108:18
2513.17:108:18
2613.17:118:18
2713.17:128:18
2813.17:128:18
2913.17:138:17
3013.17:148:17
3113.07:148:17

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.88 kWh/m².

For context, solar energy here swings from a low near 3.43 kWh/m² to a high of 6.17 kWh/m² in November across the year — January's 5.88 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Bright
46.0Bright
56.0Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in January

Hazard calendar for Rosana

In seasonPeak

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

Rosana's rainy season runs September–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 Rosana?

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

3.4
Sightseeing
12th-best month of the year
5.1
Beach & pool
12th-best month of the year

January is a weaker month for outdoor sightseeing in Rosana.

What to pack for Rosana in January

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

In January, Rosana sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

UV index in Rosana in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 15 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rosana peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 14 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateExtremeJan 19UV 15Sep 14UV 4
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar13Extreme
Apr10Very high
May7Very high
Jun6High
Jul6High
Aug8Very high
Sep3Moderate
Oct11Extreme
Nov12Extreme
Dec13Extreme

Air quality in Rosana 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 Rosana is worst in September — around 35 µg/m³ PM2.5 (moderate), about 6.4× the cleanest month (March, 5 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1632 µg/m³Mar 205 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb7Good
Mar5Good
Apr6Good
May7Good
Jun7Good
Jul7Good
Aug11Good
Sep35Moderate
Oct13Moderate
Nov9Good
Dec6Good
Location & terrain

Where is Rosana?

Rosana sits at 22.6°S, 53.1°W, 285 m above sea level, in Brazil. The nearest listed city is Taquarussu, 32 km away.

Topography around Rosana

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

Within 3 km, the terrain around Rosana has only modest variations in elevation — a maximum elevation change of 73 m around an average of 251 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 178 m; within 80 km, significant variations in elevation — a maximum elevation change of 394 m.

The land around Rosana is covered by grassland (52%), trees (21%) and water (21%) within 3 km, grassland (51%) within 16 km, and grassland (42%) and cropland (35%) within 80 km.

3 km
73 m
16 km
178 m
80 km
394 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: Taquarussu 32 km · Loanda 39 km · Nova Andradina 48 km · Paranavaí 82 km · Teodoro Sampaio 92 km · Nova Esperança 110 km · Colorado 115 km · Bataguassu 116 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 Rosana (-22.5797°, -53.0592°, elevation 285 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).