Belterra weather in September

In September, Belterra sees average daytime highs of 32°C and overnight lows near 26°C, with 76 mm of rain across 12.3 wet days and about 12 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 44% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Belterra's 2nd-clearest and 1st-windiest month. For the whole year in context, see Belterra's year-round climate.

Daytime high: 32°; 2nd warmest
Overnight low: 26°; 12th coldest
Rainfall: 76 mm; 12.3 wet days
Daylight: 12 hours; 6:34 AM – 6:34 PM
Cloud cover: 50%; 2nd clearest
Wind: 10 km/h; 1st windiest
Solar energy: 6.17 kWh/m²
Travel score: 4.1; out of 10

← August Belterra year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical September day in Belterra reaches about 32°C in the afternoon and slips back to 26°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 33°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

	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
Avg high (°C)	31	31	31	31	31	31	31	31	31	31	31	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32
Avg low (°C)	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26

	Avg high (°C)	Avg low (°C)
1	31	26
2	31	26
3	31	26
4	31	26
5	31	26
6	31	26
7	31	26
8	31	26
9	31	26
10	31	26
11	31	26
12	32	26
13	32	26
14	32	26
15	32	26
16	32	26
17	32	26
18	32	26
19	32	26
20	32	26
21	32	26
22	32	26
23	32	26
24	32	26
25	32	26
26	32	26
27	32	26
28	32	26
29	32	26
30	32	26

How September really feels in Belterra

Once humidity and wind are folded in, September averages 30 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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Belterra weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	29° / 25°	412	28	12.1	3.1
Feb	29° / 24°	394	26.1	12.1	3.1
Mar	29° / 24°	493	29.2	12	3.0
Apr	29° / 25°	448	29	11.9	2.9
May	29° / 25°	337	29.5	11.9	3.1
Jun	29° / 25°	157	23.1	11.9	3.7
Jul	30° / 25°	111	19.2	11.9	4.3
Aug	31° / 26°	78	13.5	11.9	4.4
Sep	32° / 26°	76	12.3	12	4.1
Oct	32° / 26°	112	12.7	12.1	3.9
Nov	31° / 26°	157	17.2	12.1	3.6
Dec	30° / 25°	240	21.9	12.1	3.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 36%.

	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
Clearer (%)	67	66	66	66	66	65	65	65	65	65	65	65	65	65	65	65	64	64	64	63	63	62	63	62	62	61	61	60	60	58
Cloudier (%)	33	34	34	34	34	35	35	35	35	35	35	35	35	35	35	35	36	36	36	37	37	38	37	38	38	39	39	40	40	42

	Clearer (%)	Cloudier (%)
1	67	33
2	66	34
3	66	34
4	66	34
5	66	34
6	65	35
7	65	35
8	65	35
9	65	35
10	65	35
11	65	35
12	65	35
13	65	35
14	65	35
15	65	35
16	65	35
17	64	36
18	64	36
19	64	36
20	63	37
21	63	37
22	62	38
23	63	37
24	62	38
25	62	38
26	61	39
27	61	39
28	60	40
29	60	40
30	58	42

Chance of precipitation in September

Any precipitation

Belterra gets around 76 mm of rain over 12.3 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 41% and peaks near 42% on the wettest days.

	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
Rain chance (%)	42	42	42	42	42	42	42	42	42	42	42	42	41	41	41	41	41	40	40	40	40	40	39	39	39	39	39	39	39	40

	Rain chance (%)
1	42
2	42
3	42
4	42
5	42
6	42
7	42
8	42
9	42
10	42
11	42
12	42
13	41
14	41
15	41
16	41
17	41
18	40
19	40
20	40
21	40
22	40
23	39
24	39
25	39
26	39
27	39
28	39
29	39
30	40

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 94% of days. Sticky, muggy-or-worse air turns up on roughly 100% 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
Muggy (%)	1	1	1	1	1	2	2	2	2	2	2	3	3	3	3	3	3	2	2	2	2	2	2	2	2	2	3	3	3	3
Oppressive (%)	96	96	96	96	96	95	94	94	94	94	94	93	93	93	93	93	93	94	94	94	94	94	94	94	95	95	94	94	94	94
Miserable (%)	3	3	3	3	3	3	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	3	3	3	3	3	3

	Muggy (%)	Oppressive (%)	Miserable (%)
1	1	96	3
2	1	96	3
3	1	96	3
4	1	96	3
5	1	96	3
6	2	95	3
7	2	94	4
8	2	94	4
9	2	94	4
10	2	94	4
11	2	94	4
12	3	93	4
13	3	93	4
14	3	93	4
15	3	93	4
16	3	93	4
17	3	93	4
18	2	94	4
19	2	94	4
20	2	94	4
21	2	94	4
22	2	94	4
23	2	94	4
24	2	94	4
25	2	95	3
26	2	95	3
27	3	94	3
28	3	94	3
29	3	94	3
30	3	94	3

Wind in September

Winds average 10 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 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
Wind speed (km/h)	10	10	10	11	11	11	11	11	11	11	11	11	11	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10
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

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over September. Sunrise moves from 6:41 AM to 6:28 AM, and sunset from 6:38 PM to 6:30 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
Daylight (h)	11.9	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0
Sunrise (AM)	6:41	6:41	6:40	6:40	6:39	6:39	6:38	6:38	6:38	6:37	6:37	6:36	6:36	6:35	6:35	6:34	6:34	6:34	6:33	6:33	6:32	6:32	6:31	6:31	6:31	6:30	6:30	6:29	6:29	6:28
Sunset (PM)	6:38	6:38	6:37	6:37	6:37	6:37	6:36	6:36	6:36	6:35	6:35	6:35	6:35	6:34	6:34	6:34	6:33	6:33	6:33	6:32	6:32	6:32	6:32	6:31	6:31	6:31	6:30	6:30	6:30	6:30

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.9	6:41	6:38
2	12.0	6:41	6:38
3	12.0	6:40	6:37
4	12.0	6:40	6:37
5	12.0	6:39	6:37
6	12.0	6:39	6:37
7	12.0	6:38	6:36
8	12.0	6:38	6:36
9	12.0	6:38	6:36
10	12.0	6:37	6:35
11	12.0	6:37	6:35
12	12.0	6:36	6:35
13	12.0	6:36	6:35
14	12.0	6:35	6:34
15	12.0	6:35	6:34
16	12.0	6:34	6:34
17	12.0	6:34	6:33
18	12.0	6:34	6:33
19	12.0	6:33	6:33
20	12.0	6:33	6:32
21	12.0	6:32	6:32
22	12.0	6:32	6:32
23	12.0	6:31	6:32
24	12.0	6:31	6:31
25	12.0	6:31	6:31
26	12.0	6:30	6:31
27	12.0	6:30	6:30
28	12.0	6:29	6:30
29	12.0	6:29	6:30
30	12.0	6:28	6:30

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.17 kWh/m².

For context, solar energy here swings from a low near 4.16 kWh/m² to a high of 6.18 kWh/m² in October across the year — September's 6.17 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
Solar energy (kWh/m²)	5.9	5.9	6.0	6.0	6.0	6.0	6.0	6.0	6.1	6.1	6.1	6.1	6.1	6.2	6.2	6.2	6.2	6.2	6.2	6.3	6.3	6.3	6.3	6.3	6.3	6.3	6.3	6.3	6.3	6.3
Level	Bright	Bright	Bright	Bright	Bright	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	5.9	Bright
2	5.9	Bright
3	6.0	Bright
4	6.0	Bright
5	6.0	Bright
6	6.0	Intense
7	6.0	Intense
8	6.0	Intense
9	6.1	Intense
10	6.1	Intense
11	6.1	Intense
12	6.1	Intense
13	6.1	Intense
14	6.2	Intense
15	6.2	Intense
16	6.2	Intense
17	6.2	Intense
18	6.2	Intense
19	6.2	Intense
20	6.3	Intense
21	6.3	Intense
22	6.3	Intense
23	6.3	Intense
24	6.3	Intense
25	6.3	Intense
26	6.3	Intense
27	6.3	Intense
28	6.3	Intense
29	6.3	Intense
30	6.3	Intense

Planning a trip in September

Hazard calendar for Belterra

In seasonPeak

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

Belterra's rainy season runs December–May, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Belterra?

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

4.1

Sightseeing

3rd-best month of the year

6.3

Beach & pool

2nd-best month of the year

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

What to pack for Belterra in September

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

In September, Belterra sees daytime highs around 32°C and nights near 26°C. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.

light clothessun protectionrain gear

UV index in Belterra in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Belterra peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 18 at about 10 (very 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)	14	15	15	14	11	10	10	10	11	12	10	11
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Extreme	Extreme	Extreme	Very high	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	15	Extreme
Mar	15	Extreme
Apr	14	Extreme
May	11	Extreme
Jun	10	Very high
Jul	10	Very high
Aug	10	Extreme
Sep	11	Extreme
Oct	12	Extreme
Nov	10	Very high
Dec	11	Extreme

Air quality in Belterra 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 Belterra is worst in November — around 50 µg/m³ PM2.5 (poor), about 5.5× the cleanest month (June, 9 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	16	15	15	13	10	9	10	15	24	47	50	27
Level	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Moderate	Moderate	Poor	Poor	Moderate

	PM2.5 (µg/m³)	Level
Jan	16	Moderate
Feb	15	Moderate
Mar	15	Moderate
Apr	13	Moderate
May	10	Good
Jun	9	Good
Jul	10	Good
Aug	15	Moderate
Sep	24	Moderate
Oct	47	Poor
Nov	50	Poor
Dec	27	Moderate

Location & terrain

Where is Belterra?

Belterra sits at 2.6°S, 54.9°W, 169 m above sea level, in Brazil. The nearest listed city is Mojuí dos Campos, 33 km away.

Topography around Belterra

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

Within 3 km, the terrain around Belterra has only modest variations in elevation — a maximum elevation change of 161 m around an average of 147 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 194 m; within 80 km, only modest variations in elevation — a maximum elevation change of 239 m.

The land around Belterra is covered by trees (61%) and grassland (38%) within 3 km, trees (48%), water (29%) and grassland (24%) within 16 km, and trees (57%) and water (26%) within 80 km.

3 km

161 m

trees 61%

16 km

194 m

trees 48%

80 km

239 m

trees 57%

treesgrasslandartificial surfaceswaterwetland

← August Belterra year-round climate October →Best places to visit in September

September weather nearby: Mojuí dos Campos 33 km · Santarém 33 km · Alenquer 80 km · Óbidos 103 km · Aveiro 116 km · Monte Alegre 119 km · Juruti 139 km · Oriximiná 142 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 Belterra (-2.6364°, -54.9372°, elevation 169 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).

	Avg high (°C)	Avg low (°C)
1	31	26
2	31	26
3	31	26
4	31	26
5	31	26
6	31	26
7	31	26
8	31	26
9	31	26
10	31	26
11	31	26
12	32	26
13	32	26
14	32	26
15	32	26
16	32	26
17	32	26
18	32	26
19	32	26
20	32	26
21	32	26
22	32	26
23	32	26
24	32	26
25	32	26
26	32	26
27	32	26
28	32	26
29	32	26
30	32	26

	Clearer (%)	Cloudier (%)
1	67	33
2	66	34
3	66	34
4	66	34
5	66	34
6	65	35
7	65	35
8	65	35
9	65	35
10	65	35
11	65	35
12	65	35
13	65	35
14	65	35
15	65	35
16	65	35
17	64	36
18	64	36
19	64	36
20	63	37
21	63	37
22	62	38
23	63	37
24	62	38
25	62	38
26	61	39
27	61	39
28	60	40
29	60	40
30	58	42

	Rain chance (%)
1	42
2	42
3	42
4	42
5	42
6	42
7	42
8	42
9	42
10	42
11	42
12	42
13	41
14	41
15	41
16	41
17	41
18	40
19	40
20	40
21	40
22	40
23	39
24	39
25	39
26	39
27	39
28	39
29	39
30	40

	Muggy (%)	Oppressive (%)	Miserable (%)
1	1	96	3
2	1	96	3
3	1	96	3
4	1	96	3
5	1	96	3
6	2	95	3
7	2	94	4
8	2	94	4
9	2	94	4
10	2	94	4
11	2	94	4
12	3	93	4
13	3	93	4
14	3	93	4
15	3	93	4
16	3	93	4
17	3	93	4
18	2	94	4
19	2	94	4
20	2	94	4
21	2	94	4
22	2	94	4
23	2	94	4
24	2	94	4
25	2	95	3
26	2	95	3
27	3	94	3
28	3	94	3
29	3	94	3
30	3	94	3

	Avg high (°C)	Avg low (°C)
1	31	26
2	31	26
3	31	26
4	31	26
5	31	26
6	31	26
7	31	26
8	31	26
9	31	26
10	31	26
11	31	26
12	32	26
13	32	26
14	32	26
15	32	26
16	32	26
17	32	26
18	32	26
19	32	26
20	32	26
21	32	26
22	32	26
23	32	26
24	32	26
25	32	26
26	32	26
27	32	26
28	32	26
29	32	26
30	32	26

	Clearer (%)	Cloudier (%)
1	67	33
2	66	34
3	66	34
4	66	34
5	66	34
6	65	35
7	65	35
8	65	35
9	65	35
10	65	35
11	65	35
12	65	35
13	65	35
14	65	35
15	65	35
16	65	35
17	64	36
18	64	36
19	64	36
20	63	37
21	63	37
22	62	38
23	63	37
24	62	38
25	62	38
26	61	39
27	61	39
28	60	40
29	60	40
30	58	42

	Rain chance (%)
1	42
2	42
3	42
4	42
5	42
6	42
7	42
8	42
9	42
10	42
11	42
12	42
13	41
14	41
15	41
16	41
17	41
18	40
19	40
20	40
21	40
22	40
23	39
24	39
25	39
26	39
27	39
28	39
29	39
30	40

	Muggy (%)	Oppressive (%)	Miserable (%)
1	1	96	3
2	1	96	3
3	1	96	3
4	1	96	3
5	1	96	3
6	2	95	3
7	2	94	4
8	2	94	4
9	2	94	4
10	2	94	4
11	2	94	4
12	3	93	4
13	3	93	4
14	3	93	4
15	3	93	4
16	3	93	4
17	3	93	4
18	2	94	4
19	2	94	4
20	2	94	4
21	2	94	4
22	2	94	4
23	2	94	4
24	2	94	4
25	2	95	3
26	2	95	3
27	3	94	3
28	3	94	3
29	3	94	3
30	3	94	3

	Avg high (°C)	Avg low (°C)
1	31	26
2	31	26
3	31	26
4	31	26
5	31	26
6	31	26
7	31	26
8	31	26
9	31	26
10	31	26
11	31	26
12	32	26
13	32	26
14	32	26
15	32	26
16	32	26
17	32	26
18	32	26
19	32	26
20	32	26
21	32	26
22	32	26
23	32	26
24	32	26
25	32	26
26	32	26
27	32	26
28	32	26
29	32	26
30	32	26

	Clearer (%)	Cloudier (%)
1	67	33
2	66	34
3	66	34
4	66	34
5	66	34
6	65	35
7	65	35
8	65	35
9	65	35
10	65	35
11	65	35
12	65	35
13	65	35
14	65	35
15	65	35
16	65	35
17	64	36
18	64	36
19	64	36
20	63	37
21	63	37
22	62	38
23	63	37
24	62	38
25	62	38
26	61	39
27	61	39
28	60	40
29	60	40
30	58	42

	Rain chance (%)
1	42
2	42
3	42
4	42
5	42
6	42
7	42
8	42
9	42
10	42
11	42
12	42
13	41
14	41
15	41
16	41
17	41
18	40
19	40
20	40
21	40
22	40
23	39
24	39
25	39
26	39
27	39
28	39
29	39
30	40

	Muggy (%)	Oppressive (%)	Miserable (%)
1	1	96	3
2	1	96	3
3	1	96	3
4	1	96	3
5	1	96	3
6	2	95	3
7	2	94	4
8	2	94	4
9	2	94	4
10	2	94	4
11	2	94	4
12	3	93	4
13	3	93	4
14	3	93	4
15	3	93	4
16	3	93	4
17	3	93	4
18	2	94	4
19	2	94	4
20	2	94	4
21	2	94	4
22	2	94	4
23	2	94	4
24	2	94	4
25	2	95	3
26	2	95	3
27	3	94	3
28	3	94	3
29	3	94	3
30	3	94	3