Novo Airão weather in September

In September, Novo Airão sees average daytime highs of 32°C and overnight lows near 25°C, with 117 mm of rain across 20.9 wet days and about 12 hours of daylight. It is the 1st-warmest and 11th-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 18% of the time in September, and the air most often feels miserable.

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 Novo Airão's 3rd-clearest and 9th-windiest month. For the whole year in context, see Novo Airão's year-round climate.

Daytime high: 32°; 1st warmest
Overnight low: 25°; 10th coldest
Rainfall: 117 mm; 20.9 wet days
Daylight: 12 hours; 5:59 AM – 5:58 PM
Cloud cover: 67%; 3rd clearest
Wind: 5 km/h; 9th windiest
Solar energy: 5.33 kWh/m²
Travel score: 3.1; out of 10

← August Novo Airão 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 Novo Airão reaches about 32°C in the afternoon and slips back to 25°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 34°C. Set against its neighbours, September runs on par with 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)	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32
Avg low (°C)	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25

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

How September really feels in Novo Airão

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

12 feel dangerously hot (≥ 39°C)

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.

Novo Airão weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	30° / 24°	266	26.9	12.1	3.0
Feb	30° / 24°	277	24.5	12.1	3.0
Mar	30° / 24°	350	28.5	12	2.9
Apr	29° / 24°	359	28.6	11.9	2.8
May	30° / 24°	318	29.6	11.9	2.8
Jun	30° / 24°	196	25.8	11.9	3.1
Jul	30° / 24°	132	22.4	11.9	3.5
Aug	31° / 24°	108	19.8	11.9	3.4
Sep	32° / 25°	117	20.9	12	3.1
Oct	32° / 25°	146	21.7	12.1	3.0
Nov	31° / 25°	181	23.9	12.1	2.8
Dec	30° / 24°	253	28.3	12.1	2.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 63%.

	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 (%)	43	42	41	39	38	37	36	36	35	35	34	34	33	34	34	34	35	35	35	35	35	36	36	37	38	38	39	38	38	39
Cloudier (%)	57	58	59	61	62	63	64	64	65	65	66	66	67	66	66	66	65	65	65	65	65	64	64	63	62	62	61	62	62	61

	Clearer (%)	Cloudier (%)
1	43	57
2	42	58
3	41	59
4	39	61
5	38	62
6	37	63
7	36	64
8	36	64
9	35	65
10	35	65
11	34	66
12	34	66
13	33	67
14	34	66
15	34	66
16	34	66
17	35	65
18	35	65
19	35	65
20	35	65
21	35	65
22	36	64
23	36	64
24	37	63
25	38	62
26	38	62
27	39	61
28	38	62
29	38	62
30	39	61

Chance of precipitation in September

Any precipitation

Novo Airão gets around 117 mm of rain over 20.9 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 69% and peaks near 71% 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 (%)	71	71	71	71	71	71	71	71	70	70	69	69	68	68	68	67	67	67	67	68	68	68	68	68	67	67	67	66	66	66

	Rain chance (%)
1	71
2	71
3	71
4	71
5	71
6	71
7	71
8	71
9	70
10	70
11	69
12	69
13	68
14	68
15	68
16	67
17	67
18	67
19	67
20	68
21	68
22	68
23	68
24	68
25	67
26	67
27	67
28	66
29	66
30	66

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 76% 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
Oppressive (%)	24	24	25	25	26	26	26	26	26	26	26	26	25	25	24	24	23	23	23	22	22	22	22	22	21	21	21	21	21	21
Miserable (%)	76	76	75	75	74	74	74	74	74	74	74	74	75	75	76	76	77	77	77	78	78	78	78	78	79	79	79	79	79	79

	Oppressive (%)	Miserable (%)
1	24	76
2	24	76
3	25	75
4	25	75
5	26	74
6	26	74
7	26	74
8	26	74
9	26	74
10	26	74
11	26	74
12	26	74
13	25	75
14	25	75
15	24	76
16	24	76
17	23	77
18	23	77
19	23	77
20	22	78
21	22	78
22	22	78
23	22	78
24	22	78
25	21	79
26	21	79
27	21	79
28	21	79
29	21	79
30	21	79

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 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)	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5
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	5	calm
2	5	calm
3	5	calm
4	5	calm
5	5	calm
6	5	calm
7	5	calm
8	5	calm
9	5	calm
10	5	calm
11	5	calm
12	5	calm
13	5	calm
14	5	calm
15	5	calm
16	5	calm
17	5	calm
18	5	calm
19	5	calm
20	5	calm
21	5	calm
22	5	calm
23	5	calm
24	5	calm
25	5	calm
26	5	calm
27	5	calm
28	5	calm
29	5	calm
30	5	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 6:05 AM to 5:52 AM, and sunset from 6:02 PM to 5:54 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)	6:05	6:05	6:04	6:04	6:03	6:03	6:02	6:02	6:02	6:01	6:01	6:00	6:00	5:59	5:59	5:59	5:58	5:58	5:57	5:57	5:56	5:56	5:55	5:55	5:55	5:54	5:54	5:53	5:53	5:52
Sunset (PM)	6:02	6:02	6:01	6:01	6:01	6:01	6:00	6:00	6:00	5:59	5:59	5:59	5:59	5:58	5:58	5:58	5:57	5:57	5:57	5:56	5:56	5:56	5:56	5:55	5:55	5:55	5:54	5:54	5:54	5:54

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.9	6:05	6:02
2	12.0	6:05	6:02
3	12.0	6:04	6:01
4	12.0	6:04	6:01
5	12.0	6:03	6:01
6	12.0	6:03	6:01
7	12.0	6:02	6:00
8	12.0	6:02	6:00
9	12.0	6:02	6:00
10	12.0	6:01	5:59
11	12.0	6:01	5:59
12	12.0	6:00	5:59
13	12.0	6:00	5:59
14	12.0	5:59	5:58
15	12.0	5:59	5:58
16	12.0	5:59	5:58
17	12.0	5:58	5:57
18	12.0	5:58	5:57
19	12.0	5:57	5:57
20	12.0	5:57	5:56
21	12.0	5:56	5:56
22	12.0	5:56	5:56
23	12.0	5:55	5:56
24	12.0	5:55	5:55
25	12.0	5:55	5:55
26	12.0	5:54	5:55
27	12.0	5:54	5:54
28	12.0	5:53	5:54
29	12.0	5:53	5:54
30	12.0	5:52	5:54

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.33 kWh/m².

For context, solar energy here swings from a low near 3.7 kWh/m² to a high of 5.37 kWh/m² in October across the year — September's 5.33 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)	5.2	5.2	5.2	5.2	5.2	5.2	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.4	5.4	5.4	5.4	5.4	5.4	5.4	5.4	5.4	5.4	5.5	5.5	5.5	5.5
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

	Solar energy (kWh/m²)	Level
1	5.2	Bright
2	5.2	Bright
3	5.2	Bright
4	5.2	Bright
5	5.2	Bright
6	5.2	Bright
7	5.3	Bright
8	5.3	Bright
9	5.3	Bright
10	5.3	Bright
11	5.3	Bright
12	5.3	Bright
13	5.3	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	5.4	Bright
21	5.4	Bright
22	5.4	Bright
23	5.4	Bright
24	5.4	Bright
25	5.4	Bright
26	5.4	Bright
27	5.5	Bright
28	5.5	Bright
29	5.5	Bright
30	5.5	Bright

Planning a trip in September

Is September a good time to visit Novo Airão?

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

3.1

Sightseeing

3rd-best month of the year

4.8

Beach & pool

3rd-best month of the year

September is a weaker month for outdoor sightseeing in Novo Airão.

What to pack for Novo Airão in September

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

In September, Novo Airão sees daytime highs around 32°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in Novo Airão 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 Novo Airão peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 13 at about 9 (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)	15	15	15	14	12	10	10	11	11	10	9	12
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Extreme

	UV index (midday)	Level
Jan	15	Extreme
Feb	15	Extreme
Mar	15	Extreme
Apr	14	Extreme
May	12	Extreme
Jun	10	Extreme
Jul	10	Extreme
Aug	11	Extreme
Sep	11	Extreme
Oct	10	Extreme
Nov	9	Very high
Dec	12	Extreme

Air quality in Novo Airão 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 Novo Airão is worst in October — around 20 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (June, 12 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)	15	16	17	15	12	12	12	17	18	20	20	16
Level	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	15	Moderate
Feb	16	Moderate
Mar	17	Moderate
Apr	15	Moderate
May	12	Good
Jun	12	Good
Jul	12	Good
Aug	17	Moderate
Sep	18	Moderate
Oct	20	Moderate
Nov	20	Moderate
Dec	16	Moderate

Location & terrain

Where is Novo Airão?

Novo Airão sits at 2.6°S, 60.9°W, 36 m above sea level, in Brazil. The nearest listed city is Manacapuru, 84 km away.

Topography around Novo Airão

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

Within 3 km, the terrain around Novo Airão has only modest variations in elevation — a maximum elevation change of 57 m around an average of 30 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 71 m; within 80 km, only modest variations in elevation — a maximum elevation change of 142 m.

The land around Novo Airão is covered by trees (50%) and water (39%) within 3 km, trees (67%) and water (31%) within 16 km, and trees (88%) within 80 km.

3 km

57 m

trees 50%

16 km

71 m

trees 67%

80 km

142 m

trees 88%

treesgrasslandartificial surfaceswaterwetland

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

September weather nearby: Manacapuru 84 km · Manaquiri 105 km · Iranduba 112 km · Manaus 115 km · Presidente Figueiredo 121 km · Rio Preto da Eva 138 km · Careiro da Várzea 140 km · Careiro 143 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 Novo Airão (-2.6214°, -60.9442°, elevation 36 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	32	25
2	32	25
3	32	25
4	32	25
5	32	25
6	32	25
7	32	25
8	32	25
9	32	25
10	32	25
11	32	25
12	32	25
13	32	25
14	32	25
15	32	25
16	32	25
17	32	25
18	32	25
19	32	25
20	32	25
21	32	25
22	32	25
23	32	25
24	32	25
25	32	25
26	32	25
27	32	25
28	32	25
29	32	25
30	32	25

	Clearer (%)	Cloudier (%)
1	43	57
2	42	58
3	41	59
4	39	61
5	38	62
6	37	63
7	36	64
8	36	64
9	35	65
10	35	65
11	34	66
12	34	66
13	33	67
14	34	66
15	34	66
16	34	66
17	35	65
18	35	65
19	35	65
20	35	65
21	35	65
22	36	64
23	36	64
24	37	63
25	38	62
26	38	62
27	39	61
28	38	62
29	38	62
30	39	61

	Rain chance (%)
1	71
2	71
3	71
4	71
5	71
6	71
7	71
8	71
9	70
10	70
11	69
12	69
13	68
14	68
15	68
16	67
17	67
18	67
19	67
20	68
21	68
22	68
23	68
24	68
25	67
26	67
27	67
28	66
29	66
30	66

	Oppressive (%)	Miserable (%)
1	24	76
2	24	76
3	25	75
4	25	75
5	26	74
6	26	74
7	26	74
8	26	74
9	26	74
10	26	74
11	26	74
12	26	74
13	25	75
14	25	75
15	24	76
16	24	76
17	23	77
18	23	77
19	23	77
20	22	78
21	22	78
22	22	78
23	22	78
24	22	78
25	21	79
26	21	79
27	21	79
28	21	79
29	21	79
30	21	79

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

	Clearer (%)	Cloudier (%)
1	43	57
2	42	58
3	41	59
4	39	61
5	38	62
6	37	63
7	36	64
8	36	64
9	35	65
10	35	65
11	34	66
12	34	66
13	33	67
14	34	66
15	34	66
16	34	66
17	35	65
18	35	65
19	35	65
20	35	65
21	35	65
22	36	64
23	36	64
24	37	63
25	38	62
26	38	62
27	39	61
28	38	62
29	38	62
30	39	61

	Rain chance (%)
1	71
2	71
3	71
4	71
5	71
6	71
7	71
8	71
9	70
10	70
11	69
12	69
13	68
14	68
15	68
16	67
17	67
18	67
19	67
20	68
21	68
22	68
23	68
24	68
25	67
26	67
27	67
28	66
29	66
30	66

	Oppressive (%)	Miserable (%)
1	24	76
2	24	76
3	25	75
4	25	75
5	26	74
6	26	74
7	26	74
8	26	74
9	26	74
10	26	74
11	26	74
12	26	74
13	25	75
14	25	75
15	24	76
16	24	76
17	23	77
18	23	77
19	23	77
20	22	78
21	22	78
22	22	78
23	22	78
24	22	78
25	21	79
26	21	79
27	21	79
28	21	79
29	21	79
30	21	79

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

	Clearer (%)	Cloudier (%)
1	43	57
2	42	58
3	41	59
4	39	61
5	38	62
6	37	63
7	36	64
8	36	64
9	35	65
10	35	65
11	34	66
12	34	66
13	33	67
14	34	66
15	34	66
16	34	66
17	35	65
18	35	65
19	35	65
20	35	65
21	35	65
22	36	64
23	36	64
24	37	63
25	38	62
26	38	62
27	39	61
28	38	62
29	38	62
30	39	61

	Rain chance (%)
1	71
2	71
3	71
4	71
5	71
6	71
7	71
8	71
9	70
10	70
11	69
12	69
13	68
14	68
15	68
16	67
17	67
18	67
19	67
20	68
21	68
22	68
23	68
24	68
25	67
26	67
27	67
28	66
29	66
30	66

	Oppressive (%)	Miserable (%)
1	24	76
2	24	76
3	25	75
4	25	75
5	26	74
6	26	74
7	26	74
8	26	74
9	26	74
10	26	74
11	26	74
12	26	74
13	25	75
14	25	75
15	24	76
16	24	76
17	23	77
18	23	77
19	23	77
20	22	78
21	22	78
22	22	78
23	22	78
24	22	78
25	21	79
26	21	79
27	21	79
28	21	79
29	21	79
30	21	79