Arris weather in September

In September, Arris sees average daytime highs of 25°C and overnight lows near 14°C, with 70 mm of rain across 11.4 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 23°C by the end. The sky is clear or mostly clear about 48% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Arris's 4th-clearest and 11th-windiest month. For the whole year in context, see Arris's year-round climate.

Daytime high: 25°; 4th warmest
Overnight low: 14°; 9th coldest
Rainfall: 70 mm; 11.4 wet days
Daylight: 12 h 12 min; 6:22 AM – 6:35 PM
Cloud cover: 43%; 4th clearest
Wind: 7 km/h; 11th windiest
Solar energy: 5.42 kWh/m²
Travel score: 6.8; out of 10

← August Arris 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 ease over the month, from about 28°C in the first days to 23°C by the end.

A typical September day in Arris reaches about 25°C in the afternoon and slips back to 14°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 29°C. Set against its neighbours, September runs about 5°C cooler than August and about 5°C warmer 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)	28	28	28	28	27	27	27	27	26	26	26	26	26	26	25	25	25	25	25	24	24	24	24	24	23	23	23	23	23	22
Avg low (°C)	16	16	16	16	15	15	15	15	15	15	14	14	14	14	14	14	14	13	13	13	13	13	13	12	12	12	12	12	12	12

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

How September really feels in Arris

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.

Arris weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	9° / -0°	34	7.1	4.3	9.9	1.8
Feb	10° / 0°	30	6.9	4.1	10.7	2.4
Mar	13° / 2°	55	9.2	2.3	11.7	4.0
Apr	17° / 6°	64	10	0.5	12.9	5.6
May	22° / 10°	62	10.4	0	13.8	6.9
Jun	28° / 15°	41	8.3	0	14.3	6.7
Jul	31° / 18°	20	6.4	0	14.1	5.1
Aug	31° / 18°	38	9.1	0	13.3	5.2
Sep	25° / 14°	70	11.4	0	12.2	6.8
Oct	20° / 9°	54	8.2	0	11.1	6.7
Nov	14° / 4°	37	6.6	0.9	10.1	4.4
Dec	10° / 1°	30	6.2	2.8	9.7	2.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 24% of September, with mostly cloudy or overcast conditions the remaining 28%. Skies tend to cloud over as the month goes on.

	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 (%)	81	80	79	79	78	78	77	77	76	76	75	74	74	72	72	70	70	69	68	67	67	66	66	67	67	66	66	67	67	67
Cloudier (%)	19	20	21	21	22	22	23	23	24	24	25	26	26	28	28	30	30	31	32	33	33	34	34	33	33	34	34	33	33	33

	Clearer (%)	Cloudier (%)
1	81	19
2	80	20
3	79	21
4	79	21
5	78	22
6	78	22
7	77	23
8	77	23
9	76	24
10	76	24
11	75	25
12	74	26
13	74	26
14	72	28
15	72	28
16	70	30
17	70	30
18	69	31
19	68	32
20	67	33
21	67	33
22	66	34
23	66	34
24	67	33
25	67	33
26	66	34
27	66	34
28	67	33
29	67	33
30	67	33

Chance of precipitation in September

Any precipitation

Arris gets around 70 mm of rain over 11.4 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 38% and peaks near 40% 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 (%)	39	39	40	40	40	40	40	40	40	39	39	39	38	38	38	38	38	37	37	37	37	36	36	36	35	35	34	34	33	33

	Rain chance (%)
1	39
2	39
3	40
4	40
5	40
6	40
7	40
8	40
9	40
10	39
11	39
12	39
13	38
14	38
15	38
16	38
17	38
18	37
19	37
20	37
21	37
22	36
23	36
24	36
25	35
26	35
27	34
28	34
29	33
30	33

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 90% 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 (%)	87	86	86	86	86	86	86	86	86	87	87	88	88	89	89	90	91	91	92	92	93	93	94	94	94	95	95	96	96	96
Comfortable (%)	13	14	14	14	14	14	14	14	14	13	13	12	12	11	11	10	9	9	8	8	7	7	6	6	6	5	5	4	4	4

	Dry (%)	Comfortable (%)
1	87	13
2	86	14
3	86	14
4	86	14
5	86	14
6	86	14
7	86	14
8	86	14
9	86	14
10	87	13
11	87	13
12	88	12
13	88	12
14	89	11
15	89	11
16	90	10
17	91	9
18	91	9
19	92	8
20	92	8
21	93	7
22	93	7
23	94	6
24	94	6
25	94	6
26	95	5
27	95	5
28	96	4
29	96	4
30	96	4

Wind in September

Winds average 7 km/h in September.

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over September. Sunrise moves from 6:11 AM to 6:33 AM, and sunset from 6:58 PM to 6:15 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)	12.8	12.7	12.7	12.7	12.6	12.6	12.6	12.5	12.5	12.4	12.4	12.4	12.3	12.3	12.3	12.2	12.2	12.1	12.1	12.1	12.0	12.0	12.0	11.9	11.9	11.8	11.8	11.8	11.7	11.7
Sunrise (AM)	6:11	6:12	6:12	6:13	6:14	6:15	6:16	6:16	6:17	6:18	6:19	6:19	6:20	6:21	6:22	6:22	6:23	6:24	6:25	6:25	6:26	6:27	6:28	6:29	6:29	6:30	6:31	6:32	6:33	6:33
Sunset (PM)	6:58	6:56	6:55	6:53	6:52	6:50	6:49	6:47	6:46	6:45	6:43	6:42	6:40	6:39	6:37	6:35	6:34	6:32	6:31	6:29	6:28	6:26	6:25	6:23	6:22	6:20	6:19	6:17	6:16	6:15

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.8	6:11	6:58
2	12.7	6:12	6:56
3	12.7	6:12	6:55
4	12.7	6:13	6:53
5	12.6	6:14	6:52
6	12.6	6:15	6:50
7	12.6	6:16	6:49
8	12.5	6:16	6:47
9	12.5	6:17	6:46
10	12.4	6:18	6:45
11	12.4	6:19	6:43
12	12.4	6:19	6:42
13	12.3	6:20	6:40
14	12.3	6:21	6:39
15	12.3	6:22	6:37
16	12.2	6:22	6:35
17	12.2	6:23	6:34
18	12.1	6:24	6:32
19	12.1	6:25	6:31
20	12.1	6:25	6:29
21	12.0	6:26	6:28
22	12.0	6:27	6:26
23	12.0	6:28	6:25
24	11.9	6:29	6:23
25	11.9	6:29	6:22
26	11.8	6:30	6:20
27	11.8	6:31	6:19
28	11.8	6:32	6:17
29	11.7	6:33	6:16
30	11.7	6:33	6:15

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.42 kWh/m².

For context, solar energy here swings from a low near 2.65 kWh/m² to a high of 7.43 kWh/m² in July across the year — September's 5.42 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)	6.0	6.0	5.9	5.9	5.8	5.8	5.8	5.7	5.7	5.6	5.6	5.6	5.5	5.5	5.5	5.4	5.4	5.3	5.3	5.3	5.2	5.2	5.1	5.1	5.0	5.0	5.0	4.9	4.9	4.8
Level	Intense	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	6.0	Intense
2	6.0	Bright
3	5.9	Bright
4	5.9	Bright
5	5.8	Bright
6	5.8	Bright
7	5.8	Bright
8	5.7	Bright
9	5.7	Bright
10	5.6	Bright
11	5.6	Bright
12	5.6	Bright
13	5.5	Bright
14	5.5	Bright
15	5.5	Bright
16	5.4	Bright
17	5.4	Bright
18	5.3	Bright
19	5.3	Bright
20	5.3	Bright
21	5.2	Bright
22	5.2	Bright
23	5.1	Bright
24	5.1	Bright
25	5.0	Bright
26	5.0	Bright
27	5.0	Bright
28	4.9	Bright
29	4.9	Bright
30	4.8	Bright

Planning a trip in September

Hazard calendar for Arris

In seasonPeak

In September, Arris sits inside its dust season. The full year is below, with each hazard's peak months called out.

Arris sees seasonal dust haze (April–September), heaviest in June.

Dust

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Arris?

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

6.8

Sightseeing

2nd-best month of the year

6.1

Beach & pool

4th-best month of the year

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

What to pack for Arris in September

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

In September, Arris sees daytime highs around 25°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

UV index in Arris in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Arris peaks around July 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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)	3	5	6	6	8	9	9	8	8	6	4	2
Level	Moderate	Moderate	High	High	Very high	Very high	Very high	Very high	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	3	Moderate
Feb	5	Moderate
Mar	6	High
Apr	6	High
May	8	Very high
Jun	9	Very high
Jul	9	Very high
Aug	8	Very high
Sep	8	Very high
Oct	6	High
Nov	4	Moderate
Dec	2	Moderate

Air quality in Arris 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 Arris is worst in June — around 34 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 18 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)	20	20	24	31	31	34	30	30	31	26	19	18
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	20	Moderate
Feb	20	Moderate
Mar	24	Moderate
Apr	31	Moderate
May	31	Moderate
Jun	34	Moderate
Jul	30	Moderate
Aug	30	Moderate
Sep	31	Moderate
Oct	26	Moderate
Nov	19	Moderate
Dec	18	Moderate

Location & terrain

Where is Arris?

Arris sits at 35.3°N, 6.3°E, 1,205 m above sea level, in Algeria. The nearest listed city is Tazoult-Lambese, 26 km away.

Topography around Arris

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

Within 3 km, the terrain around Arris has large variations in elevation — a maximum elevation change of 631 m around an average of 1,290 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,476 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,322 m.

The land around Arris is covered by grassland (53%) within 3 km, grassland (62%) and trees (21%) within 16 km, and grassland (35%), bare terrain (29%) and cropland (23%) within 80 km.

3 km

631 m

grassland 53%

16 km

1,476 m

grassland 62%

80 km

2,322 m

grassland 35%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

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

September weather nearby: Tazoult-Lambese 26 km · Batna 37 km · Aïn Touta 43 km · Merouana 57 km · Kaïs 59 km · Zeribet el Oued 66 km · Sidi Okba 70 km · Biskra 72 km

Algeria travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / F; 230 V · 50 Hz
Prices: ≈ 33% of US; price level, 2025
GDP per capita: $6,051; 2025
Happiness: 5.7 / 10; World Happiness, 2025
Safe drinking water: 69%; of population, 2024
Homicide rate: 1.2; per 100k, 2023
Road deaths: 20.9; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Low; EF EPI 468
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 Arris (35.2588°, 6.3471°, elevation 1,205 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	28	16
2	28	16
3	28	16
4	28	16
5	27	15
6	27	15
7	27	15
8	27	15
9	26	15
10	26	15
11	26	14
12	26	14
13	26	14
14	26	14
15	25	14
16	25	14
17	25	14
18	25	13
19	25	13
20	24	13
21	24	13
22	24	13
23	24	13
24	24	12
25	23	12
26	23	12
27	23	12
28	23	12
29	23	12
30	22	12

	Clearer (%)	Cloudier (%)
1	81	19
2	80	20
3	79	21
4	79	21
5	78	22
6	78	22
7	77	23
8	77	23
9	76	24
10	76	24
11	75	25
12	74	26
13	74	26
14	72	28
15	72	28
16	70	30
17	70	30
18	69	31
19	68	32
20	67	33
21	67	33
22	66	34
23	66	34
24	67	33
25	67	33
26	66	34
27	66	34
28	67	33
29	67	33
30	67	33

	Rain chance (%)
1	39
2	39
3	40
4	40
5	40
6	40
7	40
8	40
9	40
10	39
11	39
12	39
13	38
14	38
15	38
16	38
17	38
18	37
19	37
20	37
21	37
22	36
23	36
24	36
25	35
26	35
27	34
28	34
29	33
30	33

	Dry (%)	Comfortable (%)
1	87	13
2	86	14
3	86	14
4	86	14
5	86	14
6	86	14
7	86	14
8	86	14
9	86	14
10	87	13
11	87	13
12	88	12
13	88	12
14	89	11
15	89	11
16	90	10
17	91	9
18	91	9
19	92	8
20	92	8
21	93	7
22	93	7
23	94	6
24	94	6
25	94	6
26	95	5
27	95	5
28	96	4
29	96	4
30	96	4

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

	Clearer (%)	Cloudier (%)
1	81	19
2	80	20
3	79	21
4	79	21
5	78	22
6	78	22
7	77	23
8	77	23
9	76	24
10	76	24
11	75	25
12	74	26
13	74	26
14	72	28
15	72	28
16	70	30
17	70	30
18	69	31
19	68	32
20	67	33
21	67	33
22	66	34
23	66	34
24	67	33
25	67	33
26	66	34
27	66	34
28	67	33
29	67	33
30	67	33

	Rain chance (%)
1	39
2	39
3	40
4	40
5	40
6	40
7	40
8	40
9	40
10	39
11	39
12	39
13	38
14	38
15	38
16	38
17	38
18	37
19	37
20	37
21	37
22	36
23	36
24	36
25	35
26	35
27	34
28	34
29	33
30	33

	Dry (%)	Comfortable (%)
1	87	13
2	86	14
3	86	14
4	86	14
5	86	14
6	86	14
7	86	14
8	86	14
9	86	14
10	87	13
11	87	13
12	88	12
13	88	12
14	89	11
15	89	11
16	90	10
17	91	9
18	91	9
19	92	8
20	92	8
21	93	7
22	93	7
23	94	6
24	94	6
25	94	6
26	95	5
27	95	5
28	96	4
29	96	4
30	96	4

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

	Clearer (%)	Cloudier (%)
1	81	19
2	80	20
3	79	21
4	79	21
5	78	22
6	78	22
7	77	23
8	77	23
9	76	24
10	76	24
11	75	25
12	74	26
13	74	26
14	72	28
15	72	28
16	70	30
17	70	30
18	69	31
19	68	32
20	67	33
21	67	33
22	66	34
23	66	34
24	67	33
25	67	33
26	66	34
27	66	34
28	67	33
29	67	33
30	67	33

	Rain chance (%)
1	39
2	39
3	40
4	40
5	40
6	40
7	40
8	40
9	40
10	39
11	39
12	39
13	38
14	38
15	38
16	38
17	38
18	37
19	37
20	37
21	37
22	36
23	36
24	36
25	35
26	35
27	34
28	34
29	33
30	33

	Dry (%)	Comfortable (%)
1	87	13
2	86	14
3	86	14
4	86	14
5	86	14
6	86	14
7	86	14
8	86	14
9	86	14
10	87	13
11	87	13
12	88	12
13	88	12
14	89	11
15	89	11
16	90	10
17	91	9
18	91	9
19	92	8
20	92	8
21	93	7
22	93	7
23	94	6
24	94	6
25	94	6
26	95	5
27	95	5
28	96	4
29	96	4
30	96	4