Boa Esperança weather in September

In September, Boa Esperança sees average daytime highs of 27°C and overnight lows near 16°C, with 59 mm of rain across 7.3 wet days and about 11.9 hours of daylight. It is the 5th-warmest and 7th-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 46% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Boa Esperança's 4th-clearest and 1st-windiest month. For the whole year in context, see Boa Esperança's year-round climate.

Daytime high
27°
5th warmest
Overnight low
16°
5th coldest
Rainfall
59 mm
7.3 wet days
Daylight
11 h 54 min
7:00 AM – 6:53 PM
Cloud cover
48%
4th clearest
Wind
9 km/h
1st windiest
Solar energy
5.52 kWh/m²
Travel score
7.0
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

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

A typical September day in Boa Esperança reaches about 27°C in the afternoon and slips back to 16°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 31°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)
12714
22715
32715
42715
52715
62715
72715
82715
92715
102715
112715
122715
132716
142716
152816
162816
172816
182816
192816
202816
212816
222816
232816
242816
252816
262816
272816
282817
292817
302817

Boa Esperança weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 20°24521.813.14.4
Feb28° / 19°14216.912.74.6
Mar28° / 19°15918.412.15.2
Apr27° / 17°588.711.56.7
May24° / 15°405.4117.7
Jun24° / 13°162.710.78.4
Jul24° / 13°12210.88.7
Aug26° / 13°162.811.38.3
Sep27° / 16°597.311.97.0
Oct28° / 18°10012.812.55.7
Nov27° / 18°18619134.9
Dec27° / 19°24322.913.34.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 40%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17426
27426
37228
47228
57129
67129
76931
86832
96634
106535
116436
126238
136139
145941
155842
165842
175743
185545
195545
205446
215446
225347
235248
245149
255149
265050
274951
284951
294951
304852

Chance of precipitation in September

Any precipitation

Boa Esperança gets around 59 mm of rain over 7.3 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 25% and peaks near 36% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
114
214
315
415
516
616
717
818
919
1020
1120
1221
1322
1423
1524
1625
1726
1827
1928
2029
2130
2231
2331
2432
2533
2633
2734
2834
2935
3036

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 39% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1573490
25535100
35535100
45435110
55236120
65136130
75036140
84936150
94736160
104637170
114537181
124337191
134237201
144037221
153937231
163737241
173637252
183537262
193337272
203237292
213137303
222936313
232835334
242735344
252634355
262533365
272532386
282431396
292331407
302230418

Wind in September

Winds average 9 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 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 36 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over September. Sunrise moves from 7:15 AM to 6:46 AM, and sunset from 6:49 PM to 6:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:156:49
211.67:146:49
311.67:136:50
411.67:126:50
511.77:116:50
611.77:106:51
711.77:096:51
811.77:086:51
911.77:076:51
1011.87:066:52
1111.87:056:52
1211.87:046:52
1311.87:036:52
1411.87:026:53
1511.97:016:53
1611.97:006:53
1711.96:596:53
1811.96:586:54
1911.96:576:54
2012.06:566:54
2112.06:556:54
2212.06:546:55
2312.06:536:55
2412.06:526:55
2512.16:516:55
2612.16:506:56
2712.16:496:56
2812.16:486:56
2912.26:476:56
3012.26:466:57

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.52 kWh/m².

For context, solar energy here swings from a low near 3.86 kWh/m² to a high of 5.78 kWh/m² in February across the year — September's 5.52 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.6Bright
305.6Bright
Planning a trip in September

Hazard calendar for Boa Esperança

In seasonPeak

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

Boa Esperança'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 Boa Esperança?

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

7.0
Sightseeing
5th-best month of the year
7.2
Beach & pool
3rd-best month of the year

September is one of the better times to visit Boa Esperança for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Boa Esperança in September

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

In September, Boa Esperança sees daytime highs around 27°C and nights near 16°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Boa Esperança in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Boa Esperança peaks around January 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 22UV 15Jun 21UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun6High
Jul7High
Aug9Very high
Sep9Very high
Oct12Extreme
Nov14Extreme
Dec14Extreme

Air quality in Boa Esperança in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Boa Esperança is worst in September — around 23 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (November, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1622 µg/m³Nov 237 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar8Good
Apr8Good
May8Good
Jun8Good
Jul8Good
Aug12Good
Sep23Moderate
Oct12Good
Nov7Good
Dec7Good
Location & terrain

Where is Boa Esperança?

Boa Esperança sits at 21.1°S, 45.6°W, 780 m above sea level, in Brazil. The nearest listed city is Campos Gerais, 26 km away.

Topography around Boa Esperança

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

Within 3 km, the terrain around Boa Esperança has only modest variations in elevation — a maximum elevation change of 125 m around an average of 801 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 547 m; within 80 km, large variations in elevation — a maximum elevation change of 728 m.

The land around Boa Esperança is covered by trees (26%), grassland (21%) and artificial surfaces (21%) within 3 km, trees (43%), grassland (31%) and cropland (21%) within 16 km, and grassland (40%) and trees (38%) within 80 km.

3 km
125 m
16 km
547 m
80 km
728 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Campos Gerais 26 km · Três Pontas 31 km · Campo Belo 37 km · Nepomuceno 38 km · Perdões 49 km · Varginha 53 km · Paraguaçu 54 km · Alfenas 55 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 Boa Esperança (-21.09°, -45.5658°, elevation 780 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).