Ayacucho weather in September

In September, Ayacucho sees average daytime highs of 17°C and overnight lows near 6°C, with 61 mm of rain across 6.8 wet days and about 11.7 hours of daylight. It is the 8th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 17°C by the end. The sky is clear or mostly clear about 34% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 12 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Ayacucho's 9th-clearest and 2nd-windiest month. For the whole year in context, see Ayacucho's year-round climate.

Daytime high: 17°; 8th warmest
Overnight low: 6°; 4th coldest
Rainfall: 61 mm; 6.8 wet days
Daylight: 11 h 48 min; 6:55 AM – 6:41 PM
Cloud cover: 59%; 9th clearest
Wind: 14 km/h; 2nd windiest
Solar energy: 4.22 kWh/m²
Travel score: 5.6; out of 10

Ayacucho is city in Buenos Aires province, Argentina.

Founded: 1866

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

← August Ayacucho 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

Highs climb over the month, from about 16°C in the first days to 17°C by the end.

A typical September day in Ayacucho reaches about 17°C in the afternoon and slips back to 6°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 21°C. Set against its neighbours, September runs about 2°C warmer than August and about 3°C cooler than 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)	16	16	16	16	16	16	16	16	16	16	16	16	16	16	17	17	17	17	17	17	17	17	17	17	17	17	17	18	18	18
Avg low (°C)	5	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	7	7	7	7	7	7	7

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

How September really feels in Ayacucho

Once humidity and wind are folded in, September averages 0 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

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ayacucho weather by month

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

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	27° / 15°	83	8.7	14.3	6.9
Feb	26° / 15°	73	8.1	13.4	7.0
Mar	24° / 13°	76	8.2	12.3	7.3
Apr	20° / 10°	80	7.3	11.1	6.8
May	16° / 7°	45	5.9	10	5.7
Jun	13° / 4°	48	4.9	9.5	4.2
Jul	13° / 4°	44	5.5	9.7	3.7
Aug	15° / 5°	54	5.5	10.6	4.9
Sep	17° / 6°	61	6.8	11.7	5.6
Oct	20° / 9°	84	9.6	13	6.3
Nov	23° / 11°	87	9.4	14	7.0
Dec	26° / 13°	73	8.7	14.5	7.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% 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 53%.

	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 (%)	45	46	45	45	45	47	47	47	47	48	49	49	49	49	49	49	49	49	49	49	48	48	47	47	46	46	45	45	45	45
Cloudier (%)	55	54	55	55	55	53	53	53	53	52	51	51	51	51	51	51	51	51	51	51	52	52	53	53	54	54	55	55	55	55

	Clearer (%)	Cloudier (%)
1	45	55
2	46	54
3	45	55
4	45	55
5	45	55
6	47	53
7	47	53
8	47	53
9	47	53
10	48	52
11	49	51
12	49	51
13	49	51
14	49	51
15	49	51
16	49	51
17	49	51
18	49	51
19	49	51
20	49	51
21	48	52
22	48	52
23	47	53
24	47	53
25	46	54
26	46	54
27	45	55
28	45	55
29	45	55
30	45	55

Chance of precipitation in September

Any precipitation

Ayacucho gets around 61 mm of rain over 6.8 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 23% and peaks near 28% on the wettest days. The odds climb toward the end of the month.

	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 (%)	20	20	21	21	21	22	22	22	22	22	22	22	22	22	22	21	21	21	21	22	22	23	23	24	25	25	26	27	27	28

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

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 96% of days. It rarely turns muggy — the humid and sticky bands barely register.

	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
Dry (%)	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	97	97	97	97	97	96	96	96	94	94	93	93
Comfortable (%)	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	4	4	4	5	5	6	6
Humid (%)	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	0	0	0	0	0	0	0	0	1	1	1	1

	Dry (%)	Comfortable (%)	Humid (%)
1	96	3	1
2	96	3	1
3	96	3	1
4	96	3	1
5	96	3	1
6	96	3	1
7	96	3	1
8	96	3	1
9	96	3	1
10	96	3	1
11	96	3	1
12	96	3	1
13	96	3	1
14	96	3	1
15	96	3	1
16	96	3	1
17	96	3	1
18	96	3	1
19	97	3	0
20	97	3	0
21	97	3	0
22	97	3	0
23	97	3	0
24	96	4	0
25	96	4	0
26	96	4	0
27	94	5	1
28	94	5	1
29	93	6	1
30	93	6	1

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 15 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)	14	14	14	14	14	14	14	14	14	14	14	14	14	15	15	15	15	15	15	14	14	14	14	15	15	15	15	15	15	15
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 12 min at the start of September to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over September. Sunrise moves from 7:19 AM to 6:33 AM, and sunset from 6:29 PM to 6:53 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)	11.2	11.2	11.2	11.3	11.3	11.4	11.4	11.4	11.5	11.5	11.6	11.6	11.6	11.7	11.7	11.8	11.8	11.8	11.9	11.9	12.0	12.0	12.1	12.1	12.1	12.2	12.2	12.3	12.3	12.3
Sunrise (AM)	7:19	7:17	7:16	7:14	7:13	7:11	7:10	7:08	7:06	7:05	7:03	7:02	7:00	6:58	6:57	6:55	6:54	6:52	6:51	6:49	6:47	6:46	6:44	6:43	6:41	6:39	6:38	6:36	6:35	6:33
Sunset (PM)	6:29	6:29	6:30	6:31	6:32	6:33	6:34	6:35	6:35	6:36	6:37	6:38	6:39	6:40	6:40	6:41	6:42	6:43	6:44	6:45	6:46	6:46	6:47	6:48	6:49	6:50	6:51	6:52	6:52	6:53

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.2	7:19	6:29
2	11.2	7:17	6:29
3	11.2	7:16	6:30
4	11.3	7:14	6:31
5	11.3	7:13	6:32
6	11.4	7:11	6:33
7	11.4	7:10	6:34
8	11.4	7:08	6:35
9	11.5	7:06	6:35
10	11.5	7:05	6:36
11	11.6	7:03	6:37
12	11.6	7:02	6:38
13	11.6	7:00	6:39
14	11.7	6:58	6:40
15	11.7	6:57	6:40
16	11.8	6:55	6:41
17	11.8	6:54	6:42
18	11.8	6:52	6:43
19	11.9	6:51	6:44
20	11.9	6:49	6:45
21	12.0	6:47	6:46
22	12.0	6:46	6:46
23	12.1	6:44	6:47
24	12.1	6:43	6:48
25	12.1	6:41	6:49
26	12.2	6:39	6:50
27	12.2	6:38	6:51
28	12.3	6:36	6:52
29	12.3	6:35	6:52
30	12.3	6:33	6:53

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.22 kWh/m².

For context, solar energy here swings from a low near 2 kWh/m² to a high of 7.55 kWh/m² in December across the year — September's 4.22 kWh/m² falls in the middle.

	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)	3.6	3.6	3.7	3.7	3.8	3.8	3.9	3.9	4.0	4.0	4.0	4.1	4.1	4.2	4.2	4.3	4.3	4.4	4.4	4.4	4.5	4.5	4.5	4.6	4.6	4.6	4.6	4.7	4.7	4.7
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	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	3.6	Moderate
2	3.6	Moderate
3	3.7	Moderate
4	3.7	Moderate
5	3.8	Moderate
6	3.8	Moderate
7	3.9	Moderate
8	3.9	Moderate
9	4.0	Moderate
10	4.0	Bright
11	4.0	Bright
12	4.1	Bright
13	4.1	Bright
14	4.2	Bright
15	4.2	Bright
16	4.3	Bright
17	4.3	Bright
18	4.4	Bright
19	4.4	Bright
20	4.4	Bright
21	4.5	Bright
22	4.5	Bright
23	4.5	Bright
24	4.6	Bright
25	4.6	Bright
26	4.6	Bright
27	4.6	Bright
28	4.7	Bright
29	4.7	Bright
30	4.7	Bright

Planning a trip in September

Is September a good time to visit Ayacucho?

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

5.6

Sightseeing

9th-best month of the year

1.1

Beach & pool

8th-best month of the year

September is a reasonable time to visit Ayacucho for sightseeing.

What to pack for Ayacucho in September

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

In September, Ayacucho sees daytime highs around 17°C and nights near 6°C. Worth packing: a warm layer. About 7 days see rain.

a warm layer

UV index in Ayacucho in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ayacucho peaks around January 1 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	12	11	9	6	3	2	3	3	5	7	10	12
Level	Extreme	Extreme	Very high	High	Moderate	Moderate	Moderate	Moderate	Moderate	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	12	Extreme
Feb	11	Extreme
Mar	9	Very high
Apr	6	High
May	3	Moderate
Jun	2	Moderate
Jul	3	Moderate
Aug	3	Moderate
Sep	5	Moderate
Oct	7	Very high
Nov	10	Extreme
Dec	12	Extreme

Location & terrain

Where is Ayacucho?

Ayacucho sits at 37.2°S, 58.5°W, 76 m above sea level, in Argentina. The nearest listed city is Tandil, 61 km away.

Topography around Ayacucho

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

Within 3 km, the terrain around Ayacucho has only modest variations in elevation — a maximum elevation change of 29 m around an average of 77 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 70 m; within 80 km, significant variations in elevation — a maximum elevation change of 481 m.

The land around Ayacucho is covered by grassland (67%) within 3 km, grassland (74%) and cropland (24%) within 16 km, and grassland (64%) and cropland (35%) within 80 km.

3 km

29 m

grassland 67%

16 km

70 m

grassland 74%

80 km

481 m

grassland 64%

treesgrasslandcroplandartificial surfaces

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

September weather nearby: Tandil 61 km · Balcarce 80 km · Santa Clara del Mar 115 km · Dolores 118 km · General Juan Madariaga 121 km · Mar del Plata 125 km · Azul 129 km · Benito Juárez 130 km

Argentina travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type C / I; 220 V · 50 Hz
Prices: ≈ 46% of US; price level, 2025
GDP per capita: $14,898; 2025
Happiness: 6.4 / 10; World Happiness, 2025
Homicide rate: 4.5; per 100k, 2023
Road deaths: 14.1; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: High; EF EPI 575
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 Ayacucho (-37.1528°, -58.4884°, elevation 76 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).

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

	Clearer (%)	Cloudier (%)
1	45	55
2	46	54
3	45	55
4	45	55
5	45	55
6	47	53
7	47	53
8	47	53
9	47	53
10	48	52
11	49	51
12	49	51
13	49	51
14	49	51
15	49	51
16	49	51
17	49	51
18	49	51
19	49	51
20	49	51
21	48	52
22	48	52
23	47	53
24	47	53
25	46	54
26	46	54
27	45	55
28	45	55
29	45	55
30	45	55

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

	Dry (%)	Comfortable (%)	Humid (%)
1	96	3	1
2	96	3	1
3	96	3	1
4	96	3	1
5	96	3	1
6	96	3	1
7	96	3	1
8	96	3	1
9	96	3	1
10	96	3	1
11	96	3	1
12	96	3	1
13	96	3	1
14	96	3	1
15	96	3	1
16	96	3	1
17	96	3	1
18	96	3	1
19	97	3	0
20	97	3	0
21	97	3	0
22	97	3	0
23	97	3	0
24	96	4	0
25	96	4	0
26	96	4	0
27	94	5	1
28	94	5	1
29	93	6	1
30	93	6	1

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

	Clearer (%)	Cloudier (%)
1	45	55
2	46	54
3	45	55
4	45	55
5	45	55
6	47	53
7	47	53
8	47	53
9	47	53
10	48	52
11	49	51
12	49	51
13	49	51
14	49	51
15	49	51
16	49	51
17	49	51
18	49	51
19	49	51
20	49	51
21	48	52
22	48	52
23	47	53
24	47	53
25	46	54
26	46	54
27	45	55
28	45	55
29	45	55
30	45	55

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

	Dry (%)	Comfortable (%)	Humid (%)
1	96	3	1
2	96	3	1
3	96	3	1
4	96	3	1
5	96	3	1
6	96	3	1
7	96	3	1
8	96	3	1
9	96	3	1
10	96	3	1
11	96	3	1
12	96	3	1
13	96	3	1
14	96	3	1
15	96	3	1
16	96	3	1
17	96	3	1
18	96	3	1
19	97	3	0
20	97	3	0
21	97	3	0
22	97	3	0
23	97	3	0
24	96	4	0
25	96	4	0
26	96	4	0
27	94	5	1
28	94	5	1
29	93	6	1
30	93	6	1

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

	Clearer (%)	Cloudier (%)
1	45	55
2	46	54
3	45	55
4	45	55
5	45	55
6	47	53
7	47	53
8	47	53
9	47	53
10	48	52
11	49	51
12	49	51
13	49	51
14	49	51
15	49	51
16	49	51
17	49	51
18	49	51
19	49	51
20	49	51
21	48	52
22	48	52
23	47	53
24	47	53
25	46	54
26	46	54
27	45	55
28	45	55
29	45	55
30	45	55

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

	Dry (%)	Comfortable (%)	Humid (%)
1	96	3	1
2	96	3	1
3	96	3	1
4	96	3	1
5	96	3	1
6	96	3	1
7	96	3	1
8	96	3	1
9	96	3	1
10	96	3	1
11	96	3	1
12	96	3	1
13	96	3	1
14	96	3	1
15	96	3	1
16	96	3	1
17	96	3	1
18	96	3	1
19	97	3	0
20	97	3	0
21	97	3	0
22	97	3	0
23	97	3	0
24	96	4	0
25	96	4	0
26	96	4	0
27	94	5	1
28	94	5	1
29	93	6	1
30	93	6	1