Santa Helena de Goiás weather in December

In December, Santa Helena de Goiás sees average daytime highs of 30°C and overnight lows near 21°C, with 220 mm of rain across 24.4 wet days and about 13 hours of daylight. It is the 8th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 10% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 hours at the start of December to 13 h 06 min by month's end. Set against the rest of the year, December is Santa Helena de Goiás's 11th-clearest and 8th-windiest month. For the whole year in context, see Santa Helena de Goiás's year-round climate.

Daytime high
30°
8th warmest
Overnight low
21°
12th coldest
Rainfall
220 mm
24.4 wet days
Daylight
13 h 06 min
6:47 AM – 7:50 PM
Cloud cover
78%
11th clearest
Wind
7 km/h
8th windiest
Solar energy
5.63 kWh/m²
Travel score
3.2
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical December day in Santa Helena de Goiás reaches about 30°C in the afternoon and slips back to 21°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 33°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13021
23021
33021
43022
53022
63022
73022
83022
93022
103022
113022
123022
133022
143021
153021
163021
173021
183021
193021
203021
213021
223021
233021
243021
253021
263021
273021
283021
293021
303021
313021

How December really feels in Santa Helena de Goiás

Once humidity and wind are folded in, December 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 December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Santa Helena de Goiás weather by month

How December compares with the rest of the year at a glance. December is the 8th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 21°22222.712.93.5
Feb30° / 21°17220.712.63.4
Mar30° / 21°16821.112.13.6
Apr30° / 20°7110.711.64.9
May29° / 18°223.711.26.4
Jun29° / 17°71.1117.0
Jul29° / 16°40.6116.9
Aug32° / 18°91.311.45.5
Sep33° / 20°416.111.93.9
Oct33° / 21°11514.912.43.2
Nov31° / 21°18421.912.83.2
Dec30° / 21°22024.4133.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 78%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12278
22179
32080
42080
52080
61981
71981
81981
91981
101981
112179
122179
132179
142278
152278
162377
172377
182377
192476
202476
212476
222476
232476
242476
252476
262377
272377
282377
292278
302179
312080

Chance of precipitation in December

Any precipitation

Santa Helena de Goiás gets around 220 mm of rain over 24.4 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 78% and peaks near 82% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
180
280
381
481
582
682
782
882
981
1081
1180
1280
1379
1478
1578
1677
1777
1876
1976
2076
2175
2275
2376
2476
2576
2676
2777
2877
2977
3077
3177

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 55% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1145837
2135838
3135739
4125641
5125542
6125443
7125443
8125344
9125344
10015544
11025444
12025444
13025444
14025444
15025543
16025543
17025642
18025642
19025741
20025741
21025840
22025840
23025741
24025741
25025741
26025642
27025543
28025444
29025345
30025246
31025246

Wind in December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

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

Days grow by about 6 minutes over December. Sunrise moves from 6:42 AM to 6:54 AM, and sunset from 7:42 PM to 7:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.06:427:42
213.06:437:42
313.06:437:43
413.06:437:44
513.06:437:44
613.06:437:45
713.06:447:45
813.06:447:46
913.06:447:47
1013.06:457:47
1113.06:457:48
1213.16:457:48
1313.16:467:49
1413.16:467:49
1513.16:467:50
1613.16:477:50
1713.16:477:51
1813.16:487:51
1913.16:487:52
2013.16:487:52
2113.16:497:53
2213.16:497:53
2313.16:507:54
2413.16:507:54
2513.16:517:55
2613.16:517:55
2713.16:527:56
2813.16:527:56
2913.16:537:56
3013.16:537:57
3113.16:547:57

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.63 kWh/m².

For context, solar energy here swings from a low near 4.35 kWh/m² to a high of 6.16 kWh/m² in October across the year — December's 5.63 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.6Bright
165.6Bright
175.6Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in December

Hazard calendar for Santa Helena de Goiás

In seasonPeak

In December, Santa Helena de Goiás sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Santa Helena de Goiás's monsoon runs October–March, when most of the year's rain falls.

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

Is December a good time to visit Santa Helena de Goiás?

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

3.2
Sightseeing
10th-best month of the year
4.5
Beach & pool
12th-best month of the year

December is a weaker month for outdoor sightseeing in Santa Helena de Goiás.

What to pack for Santa Helena de Goiás in December

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

In December, Santa Helena de Goiás sees daytime highs around 30°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 24 days see rain.

light clothesrain gearsun protection

UV index in Santa Helena de Goiás in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December 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 Santa Helena de Goiás peaks around January 24 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 24UV 15Jun 21UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun7Very high
Jul8Very high
Aug9Very high
Sep11Extreme
Oct12Extreme
Nov13Extreme
Dec14Extreme

Air quality in Santa Helena de Goiás in December

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Santa Helena de Goiás is worst in September — around 43 µg/m³ PM2.5 (poor), about 7.7× the cleanest month (November, 6 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodSep 1640 µg/m³Nov 226 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar8Good
Apr7Good
May7Good
Jun6Good
Jul8Good
Aug17Moderate
Sep43Poor
Oct15Moderate
Nov6Good
Dec7Good
Location & terrain

Where is Santa Helena de Goiás?

Santa Helena de Goiás sits at 17.8°S, 50.6°W, 566 m above sea level, in Brazil. The nearest listed city is Rio Verde, 35 km away.

Topography around Santa Helena de Goiás

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santa Helena de Goiás.

Within 3 km, the terrain around Santa Helena de Goiás has only modest variations in elevation — a maximum elevation change of 127 m around an average of 579 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 250 m; within 80 km, significant variations in elevation — a maximum elevation change of 523 m.

The land around Santa Helena de Goiás is covered by cropland (54%) and artificial surfaces (26%) within 3 km, cropland (82%) within 16 km, and cropland (71%) within 80 km.

3 km
127 m
16 km
250 m
80 km
523 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Rio Verde 35 km · Acreúna 52 km · Quirinópolis 72 km · Indiara 99 km · Bom Jesus de Goiás 102 km · Jataí 119 km · Santa Vitória 125 km · Pontalina 126 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 Santa Helena de Goiás (-17.8136°, -50.5969°, elevation 566 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).