Iúna weather in December

In December, Iúna sees average daytime highs of 27°C and overnight lows near 19°C, with 227 mm of rain across 18.8 wet days and about 13.2 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 9% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 06 min at the start of December to 13 h 12 min by month's end. Set against the rest of the year, December is Iúna's 11th-clearest and 5th-windiest month. For the whole year in context, see Iúna's year-round climate.

Daytime high: 27°; 4th warmest
Overnight low: 19°; 10th coldest
Rainfall: 227 mm; 18.8 wet days
Daylight: 13 h 12 min; 6:06 AM – 7:19 PM
Cloud cover: 78%; 11th clearest
Wind: 7 km/h; 5th windiest
Solar energy: 5.3 kWh/m²
Travel score: 5.0; out of 10

Iúna is settlement in Iúna, Brazil.

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

← November Iúna year-round climate January →Best places to visit in December

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical December day in Iúna reaches about 27°C in the afternoon and slips back to 19°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 30°C. Set against its neighbours, December runs about 1°C warmer than November and about 1°C cooler than January.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	26	26	26	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	28	28	28	28	28	28	28
Avg low (°C)	18	18	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19

	Avg high (°C)	Avg low (°C)
1	26	18
2	26	18
3	26	19
4	27	19
5	27	19
6	27	19
7	27	19
8	27	19
9	27	19
10	27	19
11	27	19
12	27	19
13	27	19
14	27	19
15	27	19
16	27	19
17	27	19
18	27	19
19	27	19
20	27	19
21	27	19
22	27	19
23	27	19
24	27	19
25	28	19
26	28	19
27	28	19
28	28	19
29	28	19
30	28	19
31	28	19

Iúna weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	28° / 19°	150	14.3	13.1	5.2
Feb	29° / 19°	91	10.8	12.7	5.2
Mar	28° / 19°	132	15.1	12.1	5.3
Apr	27° / 17°	63	10.7	11.5	6.4
May	25° / 15°	32	6.1	11	7.5
Jun	24° / 14°	12	2.7	10.8	8.2
Jul	24° / 14°	11	2.6	10.9	8.2
Aug	24° / 14°	15	3.7	11.3	8.1
Sep	25° / 16°	41	6.9	11.9	7.2
Oct	26° / 17°	97	11.1	12.5	6.2
Nov	26° / 18°	177	16.7	13	5.3
Dec	27° / 19°	227	18.8	13.2	5.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 78%. Skies tend to open up as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	14	14	15	15	16	16	16	17	17	18	18	19	19	20	22	23	23	24	24	26	26	26	27	27	27	27	27	26	27	27	27
Cloudier (%)	86	86	85	85	84	84	84	83	83	82	82	81	81	80	78	77	77	76	76	74	74	74	73	73	73	73	73	74	73	73	73

	Clearer (%)	Cloudier (%)
1	14	86
2	14	86
3	15	85
4	15	85
5	16	84
6	16	84
7	16	84
8	17	83
9	17	83
10	18	82
11	18	82
12	19	81
13	19	81
14	20	80
15	22	78
16	23	77
17	23	77
18	24	76
19	24	76
20	26	74
21	26	74
22	26	74
23	27	73
24	27	73
25	27	73
26	27	73
27	27	73
28	26	74
29	27	73
30	27	73
31	27	73

Chance of precipitation in December

Any precipitation

Iúna gets around 227 mm of rain over 18.8 wet days in December, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 60% and peaks near 65% on the wettest days. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	63	64	64	64	65	65	65	65	64	64	63	63	62	62	61	61	60	59	59	58	58	57	57	56	56	56	55	54	54	53	52

	Rain chance (%)
1	63
2	64
3	64
4	64
5	65
6	65
7	65
8	65
9	64
10	64
11	63
12	63
13	62
14	62
15	61
16	61
17	60
18	59
19	59
20	58
21	58
22	57
23	57
24	56
25	56
26	56
27	55
28	54
29	54
30	53
31	52

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 62% of days. Sticky, muggy-or-worse air turns up on roughly 64% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Comfortable (%)	5	5	4	4	4	3	3	3	2	2	2	2	2	2	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
Humid (%)	42	41	40	39	38	37	36	36	35	35	34	33	33	32	32	32	31	31	31	31	31	31	31	31	31	31	31	31	31	32	32
Muggy (%)	51	52	54	55	56	58	59	58	60	60	62	63	63	64	65	65	66	66	66	67	67	67	67	67	67	66	66	66	66	65	65
Oppressive (%)	2	2	2	2	2	2	2	3	3	3	2	2	2	2	2	2	2	2	2	1	1	1	1	1	1	2	2	2	2	2	2

	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	5	42	51	2
2	5	41	52	2
3	4	40	54	2
4	4	39	55	2
5	4	38	56	2
6	3	37	58	2
7	3	36	59	2
8	3	36	58	3
9	2	35	60	3
10	2	35	60	3
11	2	34	62	2
12	2	33	63	2
13	2	33	63	2
14	2	32	64	2
15	1	32	65	2
16	1	32	65	2
17	1	31	66	2
18	1	31	66	2
19	1	31	66	2
20	1	31	67	1
21	1	31	67	1
22	1	31	67	1
23	1	31	67	1
24	1	31	67	1
25	1	31	67	1
26	1	31	66	2
27	1	31	66	2
28	1	31	66	2
29	1	31	66	2
30	1	32	65	2
31	1	32	65	2

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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	7	calm
2	7	calm
3	7	calm
4	7	calm
5	7	calm
6	7	calm
7	7	calm
8	7	calm
9	7	calm
10	7	calm
11	7	calm
12	7	calm
13	7	calm
14	7	calm
15	7	calm
16	7	calm
17	7	calm
18	7	calm
19	7	calm
20	7	calm
21	7	calm
22	7	calm
23	7	calm
24	7	calm
25	7	calm
26	7	calm
27	7	calm
28	7	calm
29	7	calm
30	7	calm
31	7	calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 06 min at the start of December to 13 h 12 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 6:02 AM to 6:13 AM, and sunset from 7:10 PM to 7:26 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	13.1	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2
Sunrise (AM)	6:02	6:02	6:02	6:02	6:02	6:02	6:03	6:03	6:03	6:03	6:04	6:04	6:04	6:05	6:05	6:06	6:06	6:06	6:07	6:07	6:08	6:08	6:09	6:09	6:10	6:10	6:11	6:11	6:12	6:12	6:13
Sunset (PM)	7:10	7:11	7:11	7:12	7:13	7:13	7:14	7:15	7:15	7:16	7:16	7:17	7:17	7:18	7:19	7:19	7:20	7:20	7:21	7:21	7:22	7:22	7:23	7:23	7:23	7:24	7:24	7:25	7:25	7:25	7:26

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.1	6:02	7:10
2	13.2	6:02	7:11
3	13.2	6:02	7:11
4	13.2	6:02	7:12
5	13.2	6:02	7:13
6	13.2	6:02	7:13
7	13.2	6:03	7:14
8	13.2	6:03	7:15
9	13.2	6:03	7:15
10	13.2	6:03	7:16
11	13.2	6:04	7:16
12	13.2	6:04	7:17
13	13.2	6:04	7:17
14	13.2	6:05	7:18
15	13.2	6:05	7:19
16	13.2	6:06	7:19
17	13.2	6:06	7:20
18	13.2	6:06	7:20
19	13.2	6:07	7:21
20	13.2	6:07	7:21
21	13.2	6:08	7:22
22	13.2	6:08	7:22
23	13.2	6:09	7:23
24	13.2	6:09	7:23
25	13.2	6:10	7:23
26	13.2	6:10	7:24
27	13.2	6:11	7:24
28	13.2	6:11	7:25
29	13.2	6:12	7:25
30	13.2	6:12	7:25
31	13.2	6:13	7:26

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.3 kWh/m².

For context, solar energy here swings from a low near 3.54 kWh/m² to a high of 5.96 kWh/m² in February across the year — December's 5.3 kWh/m² sits near the top of that range.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	4.9	5.0	5.0	5.0	5.0	5.0	5.0	5.1	5.1	5.1	5.1	5.2	5.2	5.3	5.3	5.3	5.4	5.4	5.4	5.5	5.5	5.5	5.5	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.9	Bright
2	5.0	Bright
3	5.0	Bright
4	5.0	Bright
5	5.0	Bright
6	5.0	Bright
7	5.0	Bright
8	5.1	Bright
9	5.1	Bright
10	5.1	Bright
11	5.1	Bright
12	5.2	Bright
13	5.2	Bright
14	5.3	Bright
15	5.3	Bright
16	5.3	Bright
17	5.4	Bright
18	5.4	Bright
19	5.4	Bright
20	5.5	Bright
21	5.5	Bright
22	5.5	Bright
23	5.5	Bright
24	5.6	Bright
25	5.6	Bright
26	5.6	Bright
27	5.6	Bright
28	5.6	Bright
29	5.6	Bright
30	5.6	Bright
31	5.6	Bright

Planning a trip in December

Hazard calendar for Iúna

In seasonPeak

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

Iúna's monsoon runs November–January, 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 Iúna?

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

5.0

Sightseeing

12th-best month of the year

5.1

Beach & pool

11th-best month of the year

December is a reasonable time to visit Iúna for sightseeing.

What to pack for Iúna in December

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

In December, Iúna sees daytime highs around 27°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 19 days see rain.

light clothesrain gearsun protection

UV index in Iúna 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 Iúna peaks around February 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 7 (high).

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)	15	15	14	10	8	7	7	9	10	12	14	14
Level	Extreme	Extreme	Extreme	Extreme	Very high	High	High	Very high	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	15	Extreme
Feb	15	Extreme
Mar	14	Extreme
Apr	10	Extreme
May	8	Very high
Jun	7	High
Jul	7	High
Aug	9	Very high
Sep	10	Extreme
Oct	12	Extreme
Nov	14	Extreme
Dec	14	Extreme

Location & terrain

Where is Iúna?

Iúna sits at 20.3°S, 41.5°W, 670 m above sea level, in Brazil. The nearest listed city is Ibatiba, 13 km away.

Topography around Iúna

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

Within 3 km, the terrain around Iúna has significant variations in elevation — a maximum elevation change of 300 m around an average of 711 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,249 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,831 m.

The land around Iúna is covered by trees (49%) and grassland (45%) within 3 km, trees (64%) and grassland (35%) within 16 km, and trees (57%) and grassland (42%) within 80 km.

3 km

300 m

trees 49%

16 km

1,249 m

trees 64%

80 km

2,831 m

trees 57%

treesgrasslandcroplandartificial surfaces

← November Iúna year-round climate January →Best places to visit in December

December weather nearby: Ibatiba 13 km · Muniz Freire 18 km · Lajinha 23 km · Manhumirim 44 km · Alegre 46 km · Castelo 46 km · Guaçuí 50 km · Espera Feliz 51 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 Iúna (-20.3458°, -41.5358°, elevation 670 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).

	Avg high (°C)	Avg low (°C)
1	26	18
2	26	18
3	26	19
4	27	19
5	27	19
6	27	19
7	27	19
8	27	19
9	27	19
10	27	19
11	27	19
12	27	19
13	27	19
14	27	19
15	27	19
16	27	19
17	27	19
18	27	19
19	27	19
20	27	19
21	27	19
22	27	19
23	27	19
24	27	19
25	28	19
26	28	19
27	28	19
28	28	19
29	28	19
30	28	19
31	28	19

	Clearer (%)	Cloudier (%)
1	14	86
2	14	86
3	15	85
4	15	85
5	16	84
6	16	84
7	16	84
8	17	83
9	17	83
10	18	82
11	18	82
12	19	81
13	19	81
14	20	80
15	22	78
16	23	77
17	23	77
18	24	76
19	24	76
20	26	74
21	26	74
22	26	74
23	27	73
24	27	73
25	27	73
26	27	73
27	27	73
28	26	74
29	27	73
30	27	73
31	27	73

	Rain chance (%)
1	63
2	64
3	64
4	64
5	65
6	65
7	65
8	65
9	64
10	64
11	63
12	63
13	62
14	62
15	61
16	61
17	60
18	59
19	59
20	58
21	58
22	57
23	57
24	56
25	56
26	56
27	55
28	54
29	54
30	53
31	52

	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	5	42	51	2
2	5	41	52	2
3	4	40	54	2
4	4	39	55	2
5	4	38	56	2
6	3	37	58	2
7	3	36	59	2
8	3	36	58	3
9	2	35	60	3
10	2	35	60	3
11	2	34	62	2
12	2	33	63	2
13	2	33	63	2
14	2	32	64	2
15	1	32	65	2
16	1	32	65	2
17	1	31	66	2
18	1	31	66	2
19	1	31	66	2
20	1	31	67	1
21	1	31	67	1
22	1	31	67	1
23	1	31	67	1
24	1	31	67	1
25	1	31	67	1
26	1	31	66	2
27	1	31	66	2
28	1	31	66	2
29	1	31	66	2
30	1	32	65	2
31	1	32	65	2

	Avg high (°C)	Avg low (°C)
1	26	18
2	26	18
3	26	19
4	27	19
5	27	19
6	27	19
7	27	19
8	27	19
9	27	19
10	27	19
11	27	19
12	27	19
13	27	19
14	27	19
15	27	19
16	27	19
17	27	19
18	27	19
19	27	19
20	27	19
21	27	19
22	27	19
23	27	19
24	27	19
25	28	19
26	28	19
27	28	19
28	28	19
29	28	19
30	28	19
31	28	19

	Clearer (%)	Cloudier (%)
1	14	86
2	14	86
3	15	85
4	15	85
5	16	84
6	16	84
7	16	84
8	17	83
9	17	83
10	18	82
11	18	82
12	19	81
13	19	81
14	20	80
15	22	78
16	23	77
17	23	77
18	24	76
19	24	76
20	26	74
21	26	74
22	26	74
23	27	73
24	27	73
25	27	73
26	27	73
27	27	73
28	26	74
29	27	73
30	27	73
31	27	73

	Rain chance (%)
1	63
2	64
3	64
4	64
5	65
6	65
7	65
8	65
9	64
10	64
11	63
12	63
13	62
14	62
15	61
16	61
17	60
18	59
19	59
20	58
21	58
22	57
23	57
24	56
25	56
26	56
27	55
28	54
29	54
30	53
31	52

	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	5	42	51	2
2	5	41	52	2
3	4	40	54	2
4	4	39	55	2
5	4	38	56	2
6	3	37	58	2
7	3	36	59	2
8	3	36	58	3
9	2	35	60	3
10	2	35	60	3
11	2	34	62	2
12	2	33	63	2
13	2	33	63	2
14	2	32	64	2
15	1	32	65	2
16	1	32	65	2
17	1	31	66	2
18	1	31	66	2
19	1	31	66	2
20	1	31	67	1
21	1	31	67	1
22	1	31	67	1
23	1	31	67	1
24	1	31	67	1
25	1	31	67	1
26	1	31	66	2
27	1	31	66	2
28	1	31	66	2
29	1	31	66	2
30	1	32	65	2
31	1	32	65	2

	Avg high (°C)	Avg low (°C)
1	26	18
2	26	18
3	26	19
4	27	19
5	27	19
6	27	19
7	27	19
8	27	19
9	27	19
10	27	19
11	27	19
12	27	19
13	27	19
14	27	19
15	27	19
16	27	19
17	27	19
18	27	19
19	27	19
20	27	19
21	27	19
22	27	19
23	27	19
24	27	19
25	28	19
26	28	19
27	28	19
28	28	19
29	28	19
30	28	19
31	28	19

	Clearer (%)	Cloudier (%)
1	14	86
2	14	86
3	15	85
4	15	85
5	16	84
6	16	84
7	16	84
8	17	83
9	17	83
10	18	82
11	18	82
12	19	81
13	19	81
14	20	80
15	22	78
16	23	77
17	23	77
18	24	76
19	24	76
20	26	74
21	26	74
22	26	74
23	27	73
24	27	73
25	27	73
26	27	73
27	27	73
28	26	74
29	27	73
30	27	73
31	27	73

	Rain chance (%)
1	63
2	64
3	64
4	64
5	65
6	65
7	65
8	65
9	64
10	64
11	63
12	63
13	62
14	62
15	61
16	61
17	60
18	59
19	59
20	58
21	58
22	57
23	57
24	56
25	56
26	56
27	55
28	54
29	54
30	53
31	52

	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	5	42	51	2
2	5	41	52	2
3	4	40	54	2
4	4	39	55	2
5	4	38	56	2
6	3	37	58	2
7	3	36	59	2
8	3	36	58	3
9	2	35	60	3
10	2	35	60	3
11	2	34	62	2
12	2	33	63	2
13	2	33	63	2
14	2	32	64	2
15	1	32	65	2
16	1	32	65	2
17	1	31	66	2
18	1	31	66	2
19	1	31	66	2
20	1	31	67	1
21	1	31	67	1
22	1	31	67	1
23	1	31	67	1
24	1	31	67	1
25	1	31	67	1
26	1	31	66	2
27	1	31	66	2
28	1	31	66	2
29	1	31	66	2
30	1	32	65	2
31	1	32	65	2