Mirassol weather in December

In December, Mirassol sees average daytime highs of 30°C and overnight lows near 21°C, with 234 mm of rain across 23.1 wet days and about 13.2 hours of daylight. It is the 4th-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 14% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 13 h 12 min at the start of December to 13 h 12 min by month's end. Set against the rest of the year, December is Mirassol's 11th-clearest and 8th-windiest month. For the whole year in context, see Mirassol's year-round climate.

Daytime high
30°
4th warmest
Overnight low
21°
10th coldest
Rainfall
234 mm
23.1 wet days
Daylight
13 h 18 min
6:37 AM – 7:52 PM
Cloud cover
73%
11th clearest
Wind
9 km/h
8th windiest
Solar energy
5.85 kWh/m²
Travel score
3.5
out of 10

Mirassol is human settlement in Brazil.

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

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 Mirassol 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 on par with November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13021
23021
33021
43021
53021
63021
73021
83021
93021
103021
113021
123021
133021
143021
153021
163022
173022
183022
193022
203022
213022
223022
233022
243022
253022
263022
273022
283022
293022
303022
313022

How December really feels in Mirassol

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.

Mirassol weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°27223.513.13.4
Feb30° / 22°20220.712.73.5
Mar30° / 21°18520.112.14.0
Apr29° / 20°709.511.55.6
May27° / 17°475117.4
Jun27° / 16°263.110.87.9
Jul27° / 16°152.310.98.0
Aug30° / 17°192.611.36.5
Sep31° / 19°59711.95.0
Oct31° / 21°1191312.54.1
Nov30° / 21°17217.6133.9
Dec30° / 21°23423.113.23.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 71%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13169
23169
32971
42971
52872
62872
72773
82773
92872
102773
112773
122872
132872
143070
153070
163169
173070
183169
193268
203268
213268
223169
233070
243070
252971
262971
272872
282773
292773
302674
312674

Chance of precipitation in December

Any precipitation

Mirassol gets around 234 mm of rain over 23.1 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 74% and peaks near 76% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
168
269
371
472
573
674
774
875
975
1075
1175
1275
1375
1474
1574
1674
1774
1874
1974
2074
2174
2274
2374
2474
2575
2675
2775
2876
2976
3076
3176

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 47% of days. Sticky, muggy-or-worse air turns up on roughly 93% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
113134736
213124738
312114640
412104542
51294543
61294444
71184445
81184446
90174447
100174547
110174547
120074547
130074647
140074647
150064647
160064747
170064747
180064846
190064846
200054846
210054847
220054847
230044848
240044749
250044650
260034651
270034552
280034453
290034354
300034255
310034156

Wind in December

Winds average 9 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 12 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 0 minutes over December. Sunrise moves from 6:33 AM to 6:44 AM, and sunset from 7:43 PM to 7:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.26:337:43
213.26:337:44
313.26:337:44
413.26:337:45
513.26:337:46
613.26:337:46
713.26:347:47
813.26:347:47
913.26:347:48
1013.26:347:49
1113.26:357:49
1213.26:357:50
1313.26:357:50
1413.36:367:51
1513.36:367:51
1613.36:377:52
1713.36:377:53
1813.36:377:53
1913.36:387:54
2013.36:387:54
2113.36:397:55
2213.36:397:55
2313.36:407:55
2413.36:407:56
2513.36:417:56
2613.36:417:57
2713.36:427:57
2813.36:427:58
2913.36:437:58
3013.36:437:58
3113.26:447:59

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.85 kWh/m².

For context, solar energy here swings from a low near 3.93 kWh/m² to a high of 6.1 kWh/m² in October across the year — December's 5.85 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
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
175.9Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.7Bright
Planning a trip in December

Hazard calendar for Mirassol

In seasonPeak

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

Mirassol's monsoon runs November–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 Mirassol?

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

3.5
Sightseeing
10th-best month of the year
4.8
Beach & pool
11th-best month of the year

December is a weaker month for outdoor sightseeing in Mirassol.

What to pack for Mirassol in December

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

In December, Mirassol sees daytime highs around 30°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

UV index in Mirassol 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 Mirassol peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 21UV 15Jun 20UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun7High
Jul7High
Aug8Very high
Sep10Very high
Oct10Extreme
Nov13Extreme
Dec14Extreme

Air quality in Mirassol 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 Mirassol is worst in September — around 24 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (November, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1423 µg/m³Nov 228 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar10Good
Apr10Good
May11Good
Jun10Good
Jul10Good
Aug19Moderate
Sep24Moderate
Oct16Moderate
Nov8Good
Dec8Good
Location & terrain

Where is Mirassol?

Mirassol sits at 20.8°S, 49.5°W, 567 m above sea level, in Brazil. The nearest listed city is Bady Bassitt, 14 km away.

Topography around Mirassol

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

Within 3 km, the terrain around Mirassol has only modest variations in elevation — a maximum elevation change of 126 m around an average of 546 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 194 m; within 80 km, significant variations in elevation — a maximum elevation change of 294 m.

The land around Mirassol is covered by artificial surfaces (30%), trees (25%) and grassland (24%) within 3 km, cropland (41%), trees (26%) and grassland (22%) within 16 km, and cropland (60%) within 80 km.

3 km
126 m
16 km
194 m
80 km
294 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Bady Bassitt 14 km · São José do Rio Preto 15 km · Monte Aprazível 21 km · Tanabi 25 km · Potirendaba 29 km · Guapiaçu 31 km · Nova Granada 38 km · Olímpia 64 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 Mirassol (-20.8192°, -49.5211°, elevation 567 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).