Allen weather in September

In September, Allen sees average daytime highs of 19°C and overnight lows near 7°C, with 20 mm of precipitation across 3.5 wet days and about 11.7 hours of daylight. It is the 8th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 17°C in the first days to 20°C by the end. The sky is clear or mostly clear about 44% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 06 min at the start of September to 12 h 24 min by month's end. Set against the rest of the year, September is Allen's 8th-clearest and 6th-windiest month. For the whole year in context, see Allen's year-round climate.

Daytime high: 19°; 8th warmest
Overnight low: 7°; 5th coldest
Precipitation: 20 mm; 3.5 wet days
Daylight: 11 h 42 min; 7:33 AM – 7:18 PM
Cloud cover: 47%; 8th clearest
Wind: 14 km/h; 6th windiest
Solar energy: 4.74 kWh/m²
Travel score: 7.1; out of 10

Allen is city in Río Negro, Argentina.

Founded: 1910

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

← August Allen 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 17°C in the first days to 20°C by the end.

A typical September day in Allen reaches about 19°C in the afternoon and slips back to 7°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 24°C. Set against its neighbours, September runs about 3°C warmer than August and about 4°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)	17	17	17	17	17	17	17	18	18	18	18	18	18	18	19	19	19	19	19	19	19	19	20	20	20	20	20	20	20	20
Avg low (°C)	5	5	5	5	5	5	6	6	6	6	6	6	6	6	6	7	7	7	7	7	7	7	7	8	8	8	8	8	8	8

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

How September really feels in Allen

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.

Allen weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 6th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	31° / 18°	14	2.8	14.4	5.6
Feb	30° / 17°	19	2.7	13.5	6.4
Mar	26° / 14°	22	3.1	12.3	8.1
Apr	21° / 9°	25	3.2	11	7.8
May	16° / 6°	26	5	9.9	5.7
Jun	13° / 3°	20	4.2	9.3	4.0
Jul	12° / 2°	18	3.4	9.5	3.9
Aug	15° / 4°	13	2.8	10.5	5.5
Sep	19° / 7°	20	3.5	11.7	7.1
Oct	22° / 10°	32	3.7	13	7.9
Nov	26° / 13°	19	2.8	14.1	8.1
Dec	30° / 16°	14	2.5	14.7	6.5

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 16% of September, with mostly cloudy or overcast conditions the remaining 40%.

	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 (%)	55	55	55	56	56	58	58	58	58	60	60	61	61	62	62	63	63	63	63	63	63	62	62	61	61	61	60	60	59	59
Cloudier (%)	45	45	45	44	44	42	42	42	42	40	40	39	39	38	38	37	37	37	37	37	37	38	38	39	39	39	40	40	41	41

	Clearer (%)	Cloudier (%)
1	55	45
2	55	45
3	55	45
4	56	44
5	56	44
6	58	42
7	58	42
8	58	42
9	58	42
10	60	40
11	60	40
12	61	39
13	61	39
14	62	38
15	62	38
16	63	37
17	63	37
18	63	37
19	63	37
20	63	37
21	63	37
22	62	38
23	62	38
24	61	39
25	61	39
26	61	39
27	60	40
28	60	40
29	59	41
30	59	41

Chance of precipitation in September

Any precipitation

Allen gets around 20 mm of rain and snow over 3.5 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 11% and peaks near 12% on the wettest days, and about 0 day brings snow.

	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 (%)	12	12	12	12	12	12	12	12	12	12	12	11	11	11	10	10	10	10	10	10	10	10	10	11	11	11	11	12	12	12

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

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 100% 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 (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 14 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)	13	13	13	13	13	13	13	13	13	13	13	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14
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	13	light breeze
2	13	light breeze
3	13	light breeze
4	13	light breeze
5	13	light breeze
6	13	light breeze
7	13	light breeze
8	13	light breeze
9	13	light breeze
10	13	light breeze
11	13	light breeze
12	14	light breeze
13	14	light breeze
14	14	light breeze
15	14	light breeze
16	14	light breeze
17	14	light breeze
18	14	light breeze
19	14	light breeze
20	14	light breeze
21	14	light breeze
22	14	light breeze
23	14	light breeze
24	14	light breeze
25	14	light breeze
26	14	light breeze
27	14	light breeze
28	14	light breeze
29	14	light breeze
30	14	light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 06 min at the start of September to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 78 minutes over September. Sunrise moves from 7:58 AM to 7:10 AM, and sunset from 7:04 PM to 7:31 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)	11.1	11.1	11.2	11.2	11.3	11.3	11.4	11.4	11.4	11.5	11.5	11.6	11.6	11.7	11.7	11.7	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	12.4
Sunrise (AM)	7:58	7:56	7:55	7:53	7:51	7:50	7:48	7:46	7:45	7:43	7:41	7:40	7:38	7:36	7:35	7:33	7:31	7:30	7:28	7:26	7:25	7:23	7:21	7:20	7:18	7:16	7:15	7:13	7:11	7:10
Sunset (PM)	7:04	7:05	7:06	7:07	7:08	7:09	7:10	7:11	7:12	7:13	7:13	7:14	7:15	7:16	7:17	7:18	7:19	7:20	7:21	7:22	7:23	7:24	7:25	7:26	7:27	7:28	7:28	7:29	7:30	7:31

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.1	7:58	7:04
2	11.1	7:56	7:05
3	11.2	7:55	7:06
4	11.2	7:53	7:07
5	11.3	7:51	7:08
6	11.3	7:50	7:09
7	11.4	7:48	7:10
8	11.4	7:46	7:11
9	11.4	7:45	7:12
10	11.5	7:43	7:13
11	11.5	7:41	7:13
12	11.6	7:40	7:14
13	11.6	7:38	7:15
14	11.7	7:36	7:16
15	11.7	7:35	7:17
16	11.7	7:33	7:18
17	11.8	7:31	7:19
18	11.8	7:30	7:20
19	11.9	7:28	7:21
20	11.9	7:26	7:22
21	12.0	7:25	7:23
22	12.0	7:23	7:24
23	12.1	7:21	7:25
24	12.1	7:20	7:26
25	12.1	7:18	7:27
26	12.2	7:16	7:28
27	12.2	7:15	7:28
28	12.3	7:13	7:29
29	12.3	7:11	7:30
30	12.4	7:10	7:31

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.74 kWh/m².

For context, solar energy here swings from a low near 2.01 kWh/m² to a high of 8.59 kWh/m² in December across the year — September's 4.74 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)	4.0	4.0	4.1	4.1	4.2	4.2	4.3	4.3	4.4	4.5	4.5	4.6	4.6	4.7	4.7	4.8	4.8	4.9	5.0	5.0	5.0	5.1	5.1	5.2	5.2	5.3	5.3	5.3	5.4	5.4
Level	Moderate	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	4.0	Moderate
2	4.0	Bright
3	4.1	Bright
4	4.1	Bright
5	4.2	Bright
6	4.2	Bright
7	4.3	Bright
8	4.3	Bright
9	4.4	Bright
10	4.5	Bright
11	4.5	Bright
12	4.6	Bright
13	4.6	Bright
14	4.7	Bright
15	4.7	Bright
16	4.8	Bright
17	4.8	Bright
18	4.9	Bright
19	5.0	Bright
20	5.0	Bright
21	5.0	Bright
22	5.1	Bright
23	5.1	Bright
24	5.2	Bright
25	5.2	Bright
26	5.3	Bright
27	5.3	Bright
28	5.3	Bright
29	5.4	Bright
30	5.4	Bright

Planning a trip in September

Is September a good time to visit Allen?

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

7.1

Sightseeing

5th-best month of the year

2.7

Beach & pool

8th-best month of the year

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

What to pack for Allen in September

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

In September, Allen sees daytime highs around 19°C and nights near 7°C. Worth packing: a warm layer and sun protection. About 4 days see rain.

a warm layersun protection

UV index in Allen 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 Allen peaks around December 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	12	12	8	5	3	2	2	3	5	8	10	13
Level	Extreme	Extreme	Very high	High	Moderate	Low	Low	Moderate	Moderate	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	12	Extreme
Feb	12	Extreme
Mar	8	Very high
Apr	5	High
May	3	Moderate
Jun	2	Low
Jul	2	Low
Aug	3	Moderate
Sep	5	Moderate
Oct	8	Very high
Nov	10	Extreme
Dec	13	Extreme

Location & terrain

Where is Allen?

Allen sits at 39.0°S, 67.8°W, 258 m above sea level, in Argentina. The nearest listed city is Cipolletti, 15 km away.

Topography around Allen

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

Within 3 km, the terrain around Allen has only modest variations in elevation — a maximum elevation change of 53 m around an average of 259 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 256 m; within 80 km, large variations in elevation — a maximum elevation change of 785 m.

The land around Allen is covered by shrubs (26%), artificial surfaces (21%) and trees (20%) within 3 km, shrubs (64%) within 16 km, and shrubs (86%) within 80 km.

3 km

53 m

shrubs 26%

16 km

256 m

shrubs 64%

80 km

785 m

shrubs 86%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

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

September weather nearby: Cipolletti 15 km · Neuquén 20 km · General Roca 22 km · Cinco Saltos 27 km · Centenario 31 km · Plottier 35 km · Villa Regina 66 km · Cutral-Có 121 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 Allen (-38.9774°, -67.8271°, elevation 258 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	17	5
2	17	5
3	17	5
4	17	5
5	17	5
6	17	5
7	17	6
8	18	6
9	18	6
10	18	6
11	18	6
12	18	6
13	18	6
14	18	6
15	19	6
16	19	7
17	19	7
18	19	7
19	19	7
20	19	7
21	19	7
22	19	7
23	20	7
24	20	8
25	20	8
26	20	8
27	20	8
28	20	8
29	20	8
30	20	8

	Clearer (%)	Cloudier (%)
1	55	45
2	55	45
3	55	45
4	56	44
5	56	44
6	58	42
7	58	42
8	58	42
9	58	42
10	60	40
11	60	40
12	61	39
13	61	39
14	62	38
15	62	38
16	63	37
17	63	37
18	63	37
19	63	37
20	63	37
21	63	37
22	62	38
23	62	38
24	61	39
25	61	39
26	61	39
27	60	40
28	60	40
29	59	41
30	59	41

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

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

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

	Clearer (%)	Cloudier (%)
1	55	45
2	55	45
3	55	45
4	56	44
5	56	44
6	58	42
7	58	42
8	58	42
9	58	42
10	60	40
11	60	40
12	61	39
13	61	39
14	62	38
15	62	38
16	63	37
17	63	37
18	63	37
19	63	37
20	63	37
21	63	37
22	62	38
23	62	38
24	61	39
25	61	39
26	61	39
27	60	40
28	60	40
29	59	41
30	59	41

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

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

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

	Clearer (%)	Cloudier (%)
1	55	45
2	55	45
3	55	45
4	56	44
5	56	44
6	58	42
7	58	42
8	58	42
9	58	42
10	60	40
11	60	40
12	61	39
13	61	39
14	62	38
15	62	38
16	63	37
17	63	37
18	63	37
19	63	37
20	63	37
21	63	37
22	62	38
23	62	38
24	61	39
25	61	39
26	61	39
27	60	40
28	60	40
29	59	41
30	59	41

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

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100