Unaí weather in September

In September, Unaí sees average daytime highs of 31°C and overnight lows near 18°C, with 24 mm of rain across 3.3 wet days and about 11.9 hours of daylight. It is the 2nd-warmest and 8th-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 59% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Unaí's 3rd-clearest and 1st-windiest month. For the whole year in context, see Unaí's year-round climate.

Daytime high
31°
2nd warmest
Overnight low
18°
5th coldest
Rainfall
24 mm
3.3 wet days
Daylight
11 h 54 min
7:05 AM – 6:59 PM
Cloud cover
36%
3rd clearest
Wind
8 km/h
1st windiest
Solar energy
6.18 kWh/m²
Travel score
5.3
out of 10

Unaí is human settlement in Brazil.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical September day in Unaí reaches about 31°C in the afternoon and slips back to 18°C overnight — a 13°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, September runs about 2°C warmer than August and on par with October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13117
23117
33117
43117
53117
63117
73117
83118
93118
103118
113118
123118
133118
143118
153118
163118
173118
183219
193219
203219
213219
223219
233219
243219
253219
263219
273219
283219
293219
303219

Unaí weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 20°19619.312.94.1
Feb29° / 20°13815.812.54.3
Mar29° / 20°17118.112.14.4
Apr29° / 19°609.511.65.6
May28° / 17°142.811.27.2
Jun28° / 15°30.3118.2
Jul28° / 15°0011.18.4
Aug29° / 16°4111.57.0
Sep31° / 18°243.311.95.3
Oct31° / 20°9110.212.44.3
Nov29° / 20°19319.912.83.9
Dec29° / 20°22121134.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 59% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 25%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18317
28317
38218
48218
58218
68218
78218
88119
98119
108119
118020
128020
137921
147822
157822
167723
177624
187525
197426
207228
217228
227030
236832
246832
256634
266634
276535
286436
296337
306337

Chance of precipitation in September

Any precipitation

Unaí gets around 24 mm of rain over 3.3 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 12% and peaks near 23% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
16
26
36
45
55
65
75
85
96
106
116
127
138
148
159
1610
1711
1812
1913
2014
2115
2216
2317
2418
2519
2620
2721
2822
2922
3023

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 50% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16821101
26821101
36821101
46821101
56821101
66821101
76721111
86522112
96522112
106422122
116323122
126124132
135924143
145725153
155426164
165227174
175027185
184728196
194529207
204229218
214030229
2237302310
2335302311
2433302412
2531302514
2629302615
2728302616
2827302617
2926292718
3025292719

Wind in September

Winds average 8 km/h in September, the windiest month of the year.

Across September, 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.

051015151015202530
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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over September. Sunrise moves from 7:17 AM to 6:53 AM, and sunset from 6:58 PM to 7:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.77:176:58
211.77:166:58
311.77:156:58
411.77:156:58
511.77:146:58
611.87:136:58
711.87:126:58
811.87:116:58
911.87:116:59
1011.87:106:59
1111.87:096:59
1211.87:086:59
1311.97:076:59
1411.97:066:59
1511.97:066:59
1611.97:056:59
1711.97:046:59
1811.97:036:59
1912.07:027:00
2012.07:017:00
2112.07:007:00
2212.07:007:00
2312.06:597:00
2412.06:587:00
2512.16:577:00
2612.16:567:00
2712.16:557:00
2812.16:557:01
2912.16:547:01
3012.16:537:01

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.18 kWh/m².

For context, solar energy here swings from a low near 4.52 kWh/m² to a high of 6.24 kWh/m² in October across the year — September's 6.18 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Intense
46.1Intense
56.1Intense
66.1Intense
76.1Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.2Intense
146.2Intense
156.2Intense
166.2Intense
176.2Intense
186.2Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
Planning a trip in September

Hazard calendar for Unaí

In seasonPeak

None of Unaí's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Unaí'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 September a good time to visit Unaí?

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

5.3
Sightseeing
6th-best month of the year
7.9
Beach & pool
5th-best month of the year

September is a reasonable time to visit Unaí for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Unaí in September

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

In September, Unaí sees daytime highs around 31°C and nights near 18°C. Pack light clothes and sun protection. About 3 days see rain.

light clothessun protection

UV index in Unaí in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Unaí peaks around February 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 13UV 15Jun 23UV 8
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov14Extreme
Dec13Extreme
Location & terrain

Where is Unaí?

Unaí sits at 16.4°S, 46.9°W, 582 m above sea level, in Brazil. The nearest listed city is Cristalina, 88 km away.

Topography around Unaí

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

Within 3 km, the terrain around Unaí has only modest variations in elevation — a maximum elevation change of 151 m around an average of 583 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 387 m; within 80 km, large variations in elevation — a maximum elevation change of 603 m.

The land around Unaí is covered by artificial surfaces (32%), grassland (30%) and trees (21%) within 3 km, grassland (53%) and trees (25%) within 16 km, and grassland (36%), cropland (30%) and trees (21%) within 80 km.

3 km
151 m
16 km
387 m
80 km
603 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Cristalina 88 km · Paracatu 96 km · Buritis 97 km · Arinos 99 km · Formosa 102 km · São Sebastião 106 km · Jardim Botânico 111 km · Luziânia 112 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 Unaí (-16.3575°, -46.9061°, elevation 582 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).