Oeiras weather in January

In January, Oeiras sees average daytime highs of 32°C and overnight lows near 24°C, with 165 mm of rain across 19.7 wet days and about 12.4 hours of daylight. It is the 9th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 15% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 12 h 24 min at the start of January to 12 h 18 min by month's end. Set against the rest of the year, January is Oeiras's 11th-clearest and 11th-windiest month. For the whole year in context, see Oeiras's year-round climate.

Daytime high
32°
9th warmest
Overnight low
24°
6th coldest
Rainfall
165 mm
19.7 wet days
Daylight
12 h 24 min
5:47 AM – 6:09 PM
Cloud cover
71%
11th clearest
Wind
6 km/h
11th windiest
Solar energy
5.02 kWh/m²
Travel score
3.0
out of 10

Oeiras is human settlement in Brazil.

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 32°C through the month.

A typical January day in Oeiras reaches about 32°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 29°C and 35°C. Set against its neighbours, January runs about 2°C cooler than December and on par with February.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13324
23324
33324
43324
53324
63324
73324
83324
93324
103224
113224
123224
133224
143224
153224
163224
173224
183224
193224
203224
213224
223224
233224
243224
253224
263224
273223
283223
293223
303223
313223

How January really feels in Oeiras

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.

Oeiras weather by month

How January compares with the rest of the year at a glance. January is the 9th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°16519.712.43.0
Feb32° / 23°16618.212.23.1
Mar32° / 23°16120.5123.2
Apr32° / 24°9013.211.83.6
May33° / 24°334.811.73.8
Jun33° / 24°30.511.64.2
Jul34° / 23°20.411.64.1
Aug35° / 24°00.111.83.4
Sep36° / 25°10.2122.4
Oct37° / 27°14212.22.0
Nov35° / 26°446.212.32.5
Dec34° / 25°8110.712.42.9

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 18% of January, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
33862
43763
53763
63763
73763
83664
93565
103466
113466
123367
133268
143169
152971
162971
172872
182872
192971
202872
212872
222971
232971
242971
252971
262971
273070
283169
293169
303169
313268

Chance of precipitation in January

Any precipitation

Oeiras gets around 165 mm of rain over 19.7 wet days in January. 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 68% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
150
252
353
454
556
657
758
859
959
1060
1161
1262
1363
1464
1565
1666
1767
1867
1968
2068
2168
2268
2368
2468
2568
2668
2767
2866
2965
3064
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 79% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
12825650
21824670
31724680
41723690
51622710
61622710
71621720
81520740
91520740
101519750
111518760
121518760
131517770
141416790
150415810
160415810
170414820
180313840
190313831
200312841
210312841
220212851
230211861
240211861
250211861
260211861
270211861
280112861
290112861
300112861
310113842

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 12 h 24 min at the start of January to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over January. Sunrise moves from 5:40 AM to 5:53 AM, and sunset from 6:04 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:406:04
212.45:406:04
312.45:416:05
412.45:416:05
512.45:426:05
612.45:426:06
712.45:436:06
812.45:436:06
912.45:446:07
1012.45:446:07
1112.45:446:07
1212.45:456:08
1312.45:456:08
1412.45:466:08
1512.45:466:09
1612.45:476:09
1712.45:476:09
1812.45:486:09
1912.45:486:10
2012.45:496:10
2112.35:496:10
2212.35:496:10
2312.35:506:10
2412.35:506:10
2512.35:516:11
2612.35:516:11
2712.35:516:11
2812.35:526:11
2912.35:526:11
3012.35:526:11
3112.35:536:11

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.02 kWh/m².

For context, solar energy here swings from a low near 4.96 kWh/m² to a high of 6.77 kWh/m² in September across the year — January's 5.02 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
174.9Bright
184.9Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
315.1Bright
Planning a trip in January

Hazard calendar for Oeiras

In seasonPeak

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

Oeiras's rainy season runs December–April, 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 Oeiras?

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

3.0
Sightseeing
8th-best month of the year
4.9
Beach & pool
10th-best month of the year

January is a weaker month for outdoor sightseeing in Oeiras.

What to pack for Oeiras in January

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

In January, Oeiras sees daytime highs around 32°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 Oeiras 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 Oeiras peaks around March 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 10UV 15Jun 23UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Oeiras?

Oeiras sits at 7.0°S, 42.1°W, 181 m above sea level, in Brazil. The nearest listed city is Picos, 74 km away.

Topography around Oeiras

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

Within 3 km, the terrain around Oeiras has only modest variations in elevation — a maximum elevation change of 114 m around an average of 196 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 173 m; within 80 km, significant variations in elevation — a maximum elevation change of 468 m.

The land around Oeiras is covered by shrubs (53%) within 3 km, shrubs (68%) and trees (24%) within 16 km, and shrubs (56%) and trees (33%) within 80 km.

3 km
114 m
16 km
173 m
80 km
468 m
treesshrubsgrasslandcroplandartificial surfaces
January weather nearby: Picos 74 km · Valença do Piauí 81 km · Floriano 103 km · Barão de Grajaú 103 km · Regeneração 108 km · Jaicós 116 km · Amarante 117 km · Água Branca 138 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 Oeiras (-7.0253°, -42.1311°, elevation 181 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).