Federal weather in September

In September, Federal sees average daytime highs of 22°C and overnight lows near 11°C, with 91 mm of rain across 7.1 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 21°C in the first days to 23°C by the end. 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 18 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Federal's 6th-clearest and 1st-windiest month. For the whole year in context, see Federal's year-round climate.

Daytime high: 22°; 8th warmest
Overnight low: 11°; 4th coldest
Rainfall: 91 mm; 7.1 wet days
Daylight: 11 h 48 min; 6:55 AM – 6:44 PM
Cloud cover: 48%; 6th clearest
Wind: 15 km/h; 1st windiest
Solar energy: 4.65 kWh/m²
Travel score: 7.3; out of 10

Federal is human settlement in Argentina.

Founded: 1880

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

← August Federal 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 21°C in the first days to 23°C by the end.

A typical September day in Federal reaches about 22°C in the afternoon and slips back to 11°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 29°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)	21	21	21	21	21	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	23	23	23	23	23	23	23	23	23
Avg low (°C)	10	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	12	12	12	12	12	12	12

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

Federal weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	31° / 20°	119	9	13.8	4.7
Feb	30° / 19°	116	9.2	13.1	5.2
Mar	28° / 18°	120	9	12.2	6.3
Apr	25° / 14°	153	8.6	11.3	7.2
May	21° / 11°	96	7.2	10.5	6.9
Jun	18° / 9°	78	7.1	10	6.4
Jul	18° / 8°	61	5.9	10.2	6.5
Aug	20° / 9°	80	6.5	10.9	7.1
Sep	22° / 11°	91	7.1	11.8	7.3
Oct	25° / 14°	141	9.3	12.8	7.1
Nov	27° / 16°	123	7.7	13.6	6.8
Dec	30° / 18°	123	8.4	14	5.4

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 11% of September, with mostly cloudy or overcast conditions the remaining 43%.

	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 (%)	56	55	55	55	55	55	55	56	57	58	58	58	59	59	59	60	60	60	60	60	59	59	58	58	57	56	55	55	54	54
Cloudier (%)	44	45	45	45	45	45	45	44	43	42	42	42	41	41	41	40	40	40	40	40	41	41	42	42	43	44	45	45	46	46

	Clearer (%)	Cloudier (%)
1	56	44
2	55	45
3	55	45
4	55	45
5	55	45
6	55	45
7	55	45
8	56	44
9	57	43
10	58	42
11	58	42
12	58	42
13	59	41
14	59	41
15	59	41
16	60	40
17	60	40
18	60	40
19	60	40
20	60	40
21	59	41
22	59	41
23	58	42
24	58	42
25	57	43
26	56	44
27	55	45
28	55	45
29	54	46
30	54	46

Chance of precipitation in September

Any precipitation

Federal gets around 91 mm of rain over 7.1 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 24% and peaks near 26% 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 (%)	24	25	25	25	25	25	25	25	25	25	24	24	24	24	24	23	23	23	23	23	23	23	23	23	24	24	25	25	26	26

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

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 67% 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 (%)	67	67	67	67	67	67	68	68	68	69	69	70	70	70	70	70	71	71	71	70	69	69	67	67	65	63	63	61	59	58
Comfortable (%)	16	16	16	16	17	17	17	17	17	17	17	17	17	17	17	17	16	17	17	17	18	18	19	19	20	21	21	22	22	23
Humid (%)	15	15	15	15	14	14	13	13	12	11	11	10	10	9	9	9	9	8	8	9	9	9	10	10	11	12	12	13	13	13
Muggy (%)	2	2	2	2	2	2	2	2	3	3	3	3	3	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	5	5
Oppressive (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	67	16	15	2	0
2	67	16	15	2	0
3	67	16	15	2	0
4	67	16	15	2	0
5	67	17	14	2	0
6	67	17	14	2	0
7	68	17	13	2	0
8	68	17	13	2	0
9	68	17	12	3	0
10	69	17	11	3	0
11	69	17	11	3	0
12	70	17	10	3	0
13	70	17	10	3	0
14	70	17	9	4	0
15	70	17	9	4	0
16	70	17	9	4	0
17	71	16	9	4	0
18	71	17	8	4	0
19	71	17	8	4	0
20	70	17	9	4	0
21	69	18	9	4	0
22	69	18	9	4	0
23	67	19	10	4	0
24	67	19	10	4	0
25	65	20	11	4	0
26	63	21	12	4	0
27	63	21	12	4	0
28	61	22	13	4	0
29	59	22	13	5	1
30	58	23	13	5	1

Wind in September

Winds average 15 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 15 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)	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	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	15	light breeze
2	15	light breeze
3	15	light breeze
4	15	light breeze
5	15	light breeze
6	15	light breeze
7	15	light breeze
8	15	light breeze
9	15	light breeze
10	15	light breeze
11	15	light breeze
12	15	light breeze
13	15	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	15	light breeze
21	15	light breeze
22	15	light breeze
23	15	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 18 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 60 minutes over September. Sunrise moves from 7:15 AM to 6:36 AM, and sunset from 6:35 PM to 6:52 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)	11.3	11.4	11.4	11.4	11.5	11.5	11.5	11.6	11.6	11.6	11.7	11.7	11.7	11.8	11.8	11.8	11.8	11.9	11.9	11.9	12.0	12.0	12.0	12.1	12.1	12.1	12.2	12.2	12.2	12.3
Sunrise (AM)	7:15	7:13	7:12	7:11	7:10	7:08	7:07	7:06	7:04	7:03	7:02	7:00	6:59	6:58	6:56	6:55	6:54	6:52	6:51	6:50	6:48	6:47	6:46	6:44	6:43	6:42	6:40	6:39	6:38	6:36
Sunset (PM)	6:35	6:36	6:36	6:37	6:37	6:38	6:39	6:39	6:40	6:40	6:41	6:42	6:42	6:43	6:43	6:44	6:44	6:45	6:46	6:46	6:47	6:47	6:48	6:49	6:49	6:50	6:51	6:51	6:52	6:52

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.3	7:15	6:35
2	11.4	7:13	6:36
3	11.4	7:12	6:36
4	11.4	7:11	6:37
5	11.5	7:10	6:37
6	11.5	7:08	6:38
7	11.5	7:07	6:39
8	11.6	7:06	6:39
9	11.6	7:04	6:40
10	11.6	7:03	6:40
11	11.7	7:02	6:41
12	11.7	7:00	6:42
13	11.7	6:59	6:42
14	11.8	6:58	6:43
15	11.8	6:56	6:43
16	11.8	6:55	6:44
17	11.8	6:54	6:44
18	11.9	6:52	6:45
19	11.9	6:51	6:46
20	11.9	6:50	6:46
21	12.0	6:48	6:47
22	12.0	6:47	6:47
23	12.0	6:46	6:48
24	12.1	6:44	6:49
25	12.1	6:43	6:49
26	12.1	6:42	6:50
27	12.2	6:40	6:51
28	12.2	6:39	6:51
29	12.2	6:38	6:52
30	12.3	6:36	6:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.65 kWh/m².

For context, solar energy here swings from a low near 2.46 kWh/m² to a high of 7.16 kWh/m² in December across the year — September's 4.65 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)	4.1	4.1	4.1	4.2	4.2	4.3	4.3	4.3	4.4	4.4	4.5	4.5	4.6	4.6	4.7	4.7	4.8	4.8	4.8	4.9	4.9	4.9	5.0	5.0	5.0	5.0	5.0	5.0	5.1	5.1
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	4.1	Bright
2	4.1	Bright
3	4.1	Bright
4	4.2	Bright
5	4.2	Bright
6	4.3	Bright
7	4.3	Bright
8	4.3	Bright
9	4.4	Bright
10	4.4	Bright
11	4.5	Bright
12	4.5	Bright
13	4.6	Bright
14	4.6	Bright
15	4.7	Bright
16	4.7	Bright
17	4.8	Bright
18	4.8	Bright
19	4.8	Bright
20	4.9	Bright
21	4.9	Bright
22	4.9	Bright
23	5.0	Bright
24	5.0	Bright
25	5.0	Bright
26	5.0	Bright
27	5.0	Bright
28	5.0	Bright
29	5.1	Bright
30	5.1	Bright

Planning a trip in September

Is September a good time to visit Federal?

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

7.3

Sightseeing

1st-best month of the year

5.1

Beach & pool

8th-best month of the year

September is one of the better times to visit Federal for general sightseeing.

What to pack for Federal in September

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

In September, Federal sees daytime highs around 22°C and nights near 11°C. Worth packing: light clothes and sun protection. About 7 days see rain.

light clothessun protection

UV index in Federal in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Federal peaks around January 20 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).

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)	13	13	11	7	4	3	4	5	7	7	11	12
Level	Extreme	Extreme	Extreme	High	Moderate	Moderate	Moderate	High	High	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	13	Extreme
Feb	13	Extreme
Mar	11	Extreme
Apr	7	High
May	4	Moderate
Jun	3	Moderate
Jul	4	Moderate
Aug	5	High
Sep	7	High
Oct	7	Very high
Nov	11	Extreme
Dec	12	Extreme

Location & terrain

Where is Federal?

Federal sits at 31.0°S, 58.8°W, 71 m above sea level, in Argentina. The nearest listed city is Chajarí, 79 km away.

Topography around Federal

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

Within 3 km, the terrain around Federal has only modest variations in elevation — a maximum elevation change of 17 m around an average of 64 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 30 m; within 80 km, only modest variations in elevation — a maximum elevation change of 82 m.

The land around Federal is covered by grassland (64%) within 3 km, grassland (78%) within 16 km, and grassland (53%), cropland (22%) and trees (20%) within 80 km.

3 km

17 m

grassland 64%

16 km

30 m

grassland 78%

80 km

82 m

grassland 53%

treesshrubsgrasslandcroplandartificial surfaceswater

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

September weather nearby: Chajarí 79 km · La Paz 86 km · Concordia 87 km · Salto 92 km · Santa Elena 96 km · Villaguay 104 km · San Javier 118 km · Esquina 127 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 Federal (-30.9562°, -58.7797°, elevation 71 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	21	10
2	21	11
3	21	11
4	21	11
5	21	11
6	22	11
7	22	11
8	22	11
9	22	11
10	22	11
11	22	11
12	22	11
13	22	11
14	22	11
15	22	11
16	22	11
17	22	11
18	22	11
19	22	11
20	22	11
21	22	11
22	23	11
23	23	11
24	23	12
25	23	12
26	23	12
27	23	12
28	23	12
29	23	12
30	23	12

	Clearer (%)	Cloudier (%)
1	56	44
2	55	45
3	55	45
4	55	45
5	55	45
6	55	45
7	55	45
8	56	44
9	57	43
10	58	42
11	58	42
12	58	42
13	59	41
14	59	41
15	59	41
16	60	40
17	60	40
18	60	40
19	60	40
20	60	40
21	59	41
22	59	41
23	58	42
24	58	42
25	57	43
26	56	44
27	55	45
28	55	45
29	54	46
30	54	46

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	67	16	15	2	0
2	67	16	15	2	0
3	67	16	15	2	0
4	67	16	15	2	0
5	67	17	14	2	0
6	67	17	14	2	0
7	68	17	13	2	0
8	68	17	13	2	0
9	68	17	12	3	0
10	69	17	11	3	0
11	69	17	11	3	0
12	70	17	10	3	0
13	70	17	10	3	0
14	70	17	9	4	0
15	70	17	9	4	0
16	70	17	9	4	0
17	71	16	9	4	0
18	71	17	8	4	0
19	71	17	8	4	0
20	70	17	9	4	0
21	69	18	9	4	0
22	69	18	9	4	0
23	67	19	10	4	0
24	67	19	10	4	0
25	65	20	11	4	0
26	63	21	12	4	0
27	63	21	12	4	0
28	61	22	13	4	0
29	59	22	13	5	1
30	58	23	13	5	1

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

	Clearer (%)	Cloudier (%)
1	56	44
2	55	45
3	55	45
4	55	45
5	55	45
6	55	45
7	55	45
8	56	44
9	57	43
10	58	42
11	58	42
12	58	42
13	59	41
14	59	41
15	59	41
16	60	40
17	60	40
18	60	40
19	60	40
20	60	40
21	59	41
22	59	41
23	58	42
24	58	42
25	57	43
26	56	44
27	55	45
28	55	45
29	54	46
30	54	46

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	67	16	15	2	0
2	67	16	15	2	0
3	67	16	15	2	0
4	67	16	15	2	0
5	67	17	14	2	0
6	67	17	14	2	0
7	68	17	13	2	0
8	68	17	13	2	0
9	68	17	12	3	0
10	69	17	11	3	0
11	69	17	11	3	0
12	70	17	10	3	0
13	70	17	10	3	0
14	70	17	9	4	0
15	70	17	9	4	0
16	70	17	9	4	0
17	71	16	9	4	0
18	71	17	8	4	0
19	71	17	8	4	0
20	70	17	9	4	0
21	69	18	9	4	0
22	69	18	9	4	0
23	67	19	10	4	0
24	67	19	10	4	0
25	65	20	11	4	0
26	63	21	12	4	0
27	63	21	12	4	0
28	61	22	13	4	0
29	59	22	13	5	1
30	58	23	13	5	1

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

	Clearer (%)	Cloudier (%)
1	56	44
2	55	45
3	55	45
4	55	45
5	55	45
6	55	45
7	55	45
8	56	44
9	57	43
10	58	42
11	58	42
12	58	42
13	59	41
14	59	41
15	59	41
16	60	40
17	60	40
18	60	40
19	60	40
20	60	40
21	59	41
22	59	41
23	58	42
24	58	42
25	57	43
26	56	44
27	55	45
28	55	45
29	54	46
30	54	46

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	67	16	15	2	0
2	67	16	15	2	0
3	67	16	15	2	0
4	67	16	15	2	0
5	67	17	14	2	0
6	67	17	14	2	0
7	68	17	13	2	0
8	68	17	13	2	0
9	68	17	12	3	0
10	69	17	11	3	0
11	69	17	11	3	0
12	70	17	10	3	0
13	70	17	10	3	0
14	70	17	9	4	0
15	70	17	9	4	0
16	70	17	9	4	0
17	71	16	9	4	0
18	71	17	8	4	0
19	71	17	8	4	0
20	70	17	9	4	0
21	69	18	9	4	0
22	69	18	9	4	0
23	67	19	10	4	0
24	67	19	10	4	0
25	65	20	11	4	0
26	63	21	12	4	0
27	63	21	12	4	0
28	61	22	13	4	0
29	59	22	13	5	1
30	58	23	13	5	1