Port-aux-Français weather in September

In September, Port-aux-Français sees average daytime highs of 4°C and overnight lows near -1°C, with 78 mm of precipitation across 14.5 wet days and about 11.6 hours of daylight. It is the 9th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 4°C through the month. The sky is clear or mostly clear about 11% of the time in September, and the air most often feels dry.

Daylight stretches from about 10 h 42 min at the start of September to 12 h 30 min by month's end. Set against the rest of the year, September is Port-aux-Français's 5th-clearest and 1st-windiest month. For the whole year in context, see Port-aux-Français's year-round climate.

Daytime high: 4°; 9th warmest
Overnight low: -1°; 3rd coldest
Precipitation: 78 mm; 14.5 wet days
Daylight: 11 h 36 min; 6:24 AM – 6:03 PM
Cloud cover: 73%; 5th clearest
Wind: 28 km/h; 1st windiest
Solar energy: 3.06 kWh/m²
Travel score: 0.0; out of 10

Port-aux-Français is research station in Kerguelen, French Southern and Antarctic Territories.

Founded: 1951

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

← August Port-aux-Français 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 4°C through the month.

A typical September day in Port-aux-Français reaches about 4°C in the afternoon and slips back to -1°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 1°C and 7°C. Set against its neighbours, September runs on par with August and about 1°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)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
Avg low (°C)	0	0	0	0	0	0	0	0	0	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	0	0	0	0	0	0	0	0	0

	Avg high (°C)	Avg low (°C)
1	4	0
2	4	0
3	4	0
4	4	0
5	4	0
6	4	0
7	4	0
8	4	0
9	4	0
10	4	-1
11	4	-1
12	4	-1
13	4	-1
14	4	-1
15	4	-1
16	4	-1
17	4	-1
18	4	-1
19	4	-1
20	4	-1
21	4	-1
22	4	0
23	4	0
24	4	0
25	4	0
26	4	0
27	4	0
28	4	0
29	4	0
30	4	0

How September really feels in Port-aux-Français

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 30 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

The story in September is cold — wind chill drags the overnight "feels like" below the raw low.

Port-aux-Français weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 4th-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° / 4°	68	13.5	0.6	15.6	1.8
Feb	10° / 4°	58	11.6	0.2	14.2	1.9
Mar	9° / 4°	71	13.1	0.5	12.5	1.6
Apr	7° / 3°	76	13.3	1.5	10.6	1.0
May	5° / 1°	79	14.6	3.6	8.9	0.2
Jun	4° / 0°	77	14.4	5.5	8	0.0
Jul	4° / -1°	88	15.9	7.5	8.4	0.0
Aug	4° / -1°	78	14.1	6.4	9.8	0.0
Sep	4° / -1°	78	14.5	7.2	11.6	0.0
Oct	5° / 0°	69	14.3	4.5	13.5	0.1
Nov	7° / 2°	72	15.5	2.8	15.1	0.6
Dec	8° / 3°	77	15.6	0.8	16	1.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 68%.

	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 (%)	31	31	31	31	32	32	32	33	33	34	34	34	34	34	34	34	34	34	33	33	33	33	32	31	30	30	30	29	30	30
Cloudier (%)	69	69	69	69	68	68	68	67	67	66	66	66	66	66	66	66	66	66	67	67	67	67	68	69	70	70	70	71	70	70

	Clearer (%)	Cloudier (%)
1	31	69
2	31	69
3	31	69
4	31	69
5	32	68
6	32	68
7	32	68
8	33	67
9	33	67
10	34	66
11	34	66
12	34	66
13	34	66
14	34	66
15	34	66
16	34	66
17	34	66
18	34	66
19	33	67
20	33	67
21	33	67
22	33	67
23	32	68
24	31	69
25	30	70
26	30	70
27	30	70
28	29	71
29	30	70
30	30	70

Chance of precipitation in September

Any precipitationSnow

Port-aux-Français gets around 78 mm of rain and snow over 14.5 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 47% and peaks near 49% on the wettest days, and about 7 days bring 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 (%)	49	49	49	49	49	49	49	49	49	48	48	48	47	47	47	46	46	46	46	46	46	46	46	46	46	46	46	45	45	45
Snow chance (%)	24	24	24	25	25	25	25	25	25	25	25	25	24	24	24	24	23	23	23	23	22	22	22	22	21	21	20	20	19	19

	Rain chance (%)	Snow chance (%)
1	49	24
2	49	24
3	49	24
4	49	25
5	49	25
6	49	25
7	49	25
8	49	25
9	49	25
10	48	25
11	48	25
12	48	25
13	47	24
14	47	24
15	47	24
16	46	24
17	46	23
18	46	23
19	46	23
20	46	23
21	46	22
22	46	22
23	46	22
24	46	22
25	46	21
26	46	21
27	46	20
28	45	20
29	45	19
30	45	19

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 28 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 28 km/h on the calmest days to 28 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)	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28
Feels	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 10 h 42 min at the start of September to 12 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 108 minutes over September. Sunrise moves from 6:57 AM to 5:53 AM, and sunset from 5:40 PM to 6:24 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)	10.7	10.8	10.8	10.9	11.0	11.0	11.1	11.1	11.2	11.3	11.3	11.4	11.5	11.5	11.6	11.6	11.7	11.8	11.8	11.9	12.0	12.0	12.1	12.1	12.2	12.3	12.3	12.4	12.5	12.5
Sunrise (AM)	6:57	6:55	6:53	6:51	6:49	6:47	6:44	6:42	6:40	6:38	6:35	6:33	6:31	6:29	6:26	6:24	6:22	6:20	6:17	6:15	6:13	6:11	6:09	6:06	6:04	6:02	6:00	5:57	5:55	5:53
Sunset (PM)	5:40	5:42	5:43	5:45	5:46	5:48	5:49	5:51	5:52	5:54	5:55	5:57	5:58	6:00	6:01	6:03	6:04	6:06	6:07	6:09	6:10	6:12	6:13	6:15	6:16	6:18	6:19	6:21	6:22	6:24

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.7	6:57	5:40
2	10.8	6:55	5:42
3	10.8	6:53	5:43
4	10.9	6:51	5:45
5	11.0	6:49	5:46
6	11.0	6:47	5:48
7	11.1	6:44	5:49
8	11.1	6:42	5:51
9	11.2	6:40	5:52
10	11.3	6:38	5:54
11	11.3	6:35	5:55
12	11.4	6:33	5:57
13	11.5	6:31	5:58
14	11.5	6:29	6:00
15	11.6	6:26	6:01
16	11.6	6:24	6:03
17	11.7	6:22	6:04
18	11.8	6:20	6:06
19	11.8	6:17	6:07
20	11.9	6:15	6:09
21	12.0	6:13	6:10
22	12.0	6:11	6:12
23	12.1	6:09	6:13
24	12.1	6:06	6:15
25	12.2	6:04	6:16
26	12.3	6:02	6:18
27	12.3	6:00	6:19
28	12.4	5:57	6:21
29	12.5	5:55	6:22
30	12.5	5:53	6:24

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.06 kWh/m².

For context, solar energy here swings from a low near 0.85 kWh/m² to a high of 5.89 kWh/m² in December across the year — September's 3.06 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)	2.3	2.4	2.4	2.5	2.5	2.6	2.6	2.7	2.8	2.8	2.9	2.9	3.0	3.0	3.1	3.1	3.2	3.2	3.3	3.3	3.4	3.4	3.5	3.5	3.6	3.6	3.7	3.7	3.8	3.8
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	2.3	Moderate
2	2.4	Moderate
3	2.4	Moderate
4	2.5	Moderate
5	2.5	Moderate
6	2.6	Moderate
7	2.6	Moderate
8	2.7	Moderate
9	2.8	Moderate
10	2.8	Moderate
11	2.9	Moderate
12	2.9	Moderate
13	3.0	Moderate
14	3.0	Moderate
15	3.1	Moderate
16	3.1	Moderate
17	3.2	Moderate
18	3.2	Moderate
19	3.3	Moderate
20	3.3	Moderate
21	3.4	Moderate
22	3.4	Moderate
23	3.5	Moderate
24	3.5	Moderate
25	3.6	Moderate
26	3.6	Moderate
27	3.7	Moderate
28	3.7	Moderate
29	3.8	Moderate
30	3.8	Moderate

Planning a trip in September

Is September a good time to visit Port-aux-Français?

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

0.0

Sightseeing

9th-best month of the year

—

Beach & pool

never really warm enough

September is a weaker month for outdoor sightseeing in Port-aux-Français.

What to pack for Port-aux-Français in September

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

In September, Port-aux-Français sees daytime highs around 4°C and nights near -1°C. Pack a warm layer and rain gear. Worth having: a heavy coat and a windbreaker. About 15 days see rain.

a warm layerrain geara heavy coata windbreaker

Sea temperature near Port-aux-Français in September

The nearest coast averages about 3°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in March at about 7°C and coldest in September near 3°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	6	6	7	6	5	4	3	3	3	3	4	5
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	6	Bracing
Feb	6	Bracing
Mar	7	Bracing
Apr	6	Bracing
May	5	Bracing
Jun	4	Bracing
Jul	3	Bracing
Aug	3	Bracing
Sep	3	Bracing
Oct	3	Bracing
Nov	4	Bracing
Dec	5	Bracing

UV index in Port-aux-Français in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Port-aux-Français peaks around January 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	9	8	5	2	1	1	1	2	3	5	7	8
Level	Very high	Very high	Moderate	Moderate	Low	Low	Low	Low	Moderate	Moderate	Very high	Very high

	UV index (midday)	Level
Jan	9	Very high
Feb	8	Very high
Mar	5	Moderate
Apr	2	Moderate
May	1	Low
Jun	1	Low
Jul	1	Low
Aug	2	Low
Sep	3	Moderate
Oct	5	Moderate
Nov	7	Very high
Dec	8	Very high

Location & terrain

Where is Port-aux-Français?

Port-aux-Français sits at 49.3°S, 70.2°E, 11 m above sea level, in French Southern Territories. The nearest listed city is Saint-Joseph, 3,367 km away.

Topography around Port-aux-Français

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Port-aux-Français.

Within 3 km, the terrain around Port-aux-Français has only modest variations in elevation — a maximum elevation change of 68 m around an average of 20 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 854 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,652 m.

The land around Port-aux-Français is covered by grassland (42%), water (36%) and bare terrain (20%) within 3 km, water (41%) and grassland (37%) within 16 km, and water (69%) within 80 km.

3 km

68 m

grassland 42%

16 km

854 m

water 41%

80 km

1,652 m

water 69%

grasslandbare terrainsnow and icewaterwetland

← August Port-aux-Français year-round climate October →Best places to visit in September

September weather nearby: Saint-Joseph 3,367 km · Tôlanaro 3,369 km · Saint-Pierre 3,376 km · Le Tampon 3,381 km · Saint-Louis 3,383 km · Piton Saint-Leu 3,394 km · Souillac 3,398 km · Saint-Benoît 3,399 km

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Port-aux-Français (-49.3492°, 70.2194°, elevation 11 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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	4	0
2	4	0
3	4	0
4	4	0
5	4	0
6	4	0
7	4	0
8	4	0
9	4	0
10	4	-1
11	4	-1
12	4	-1
13	4	-1
14	4	-1
15	4	-1
16	4	-1
17	4	-1
18	4	-1
19	4	-1
20	4	-1
21	4	-1
22	4	0
23	4	0
24	4	0
25	4	0
26	4	0
27	4	0
28	4	0
29	4	0
30	4	0

	Clearer (%)	Cloudier (%)
1	31	69
2	31	69
3	31	69
4	31	69
5	32	68
6	32	68
7	32	68
8	33	67
9	33	67
10	34	66
11	34	66
12	34	66
13	34	66
14	34	66
15	34	66
16	34	66
17	34	66
18	34	66
19	33	67
20	33	67
21	33	67
22	33	67
23	32	68
24	31	69
25	30	70
26	30	70
27	30	70
28	29	71
29	30	70
30	30	70

	Rain chance (%)	Snow chance (%)
1	49	24
2	49	24
3	49	24
4	49	25
5	49	25
6	49	25
7	49	25
8	49	25
9	49	25
10	48	25
11	48	25
12	48	25
13	47	24
14	47	24
15	47	24
16	46	24
17	46	23
18	46	23
19	46	23
20	46	23
21	46	22
22	46	22
23	46	22
24	46	22
25	46	21
26	46	21
27	46	20
28	45	20
29	45	19
30	45	19

	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	4	0
2	4	0
3	4	0
4	4	0
5	4	0
6	4	0
7	4	0
8	4	0
9	4	0
10	4	-1
11	4	-1
12	4	-1
13	4	-1
14	4	-1
15	4	-1
16	4	-1
17	4	-1
18	4	-1
19	4	-1
20	4	-1
21	4	-1
22	4	0
23	4	0
24	4	0
25	4	0
26	4	0
27	4	0
28	4	0
29	4	0
30	4	0

	Clearer (%)	Cloudier (%)
1	31	69
2	31	69
3	31	69
4	31	69
5	32	68
6	32	68
7	32	68
8	33	67
9	33	67
10	34	66
11	34	66
12	34	66
13	34	66
14	34	66
15	34	66
16	34	66
17	34	66
18	34	66
19	33	67
20	33	67
21	33	67
22	33	67
23	32	68
24	31	69
25	30	70
26	30	70
27	30	70
28	29	71
29	30	70
30	30	70

	Rain chance (%)	Snow chance (%)
1	49	24
2	49	24
3	49	24
4	49	25
5	49	25
6	49	25
7	49	25
8	49	25
9	49	25
10	48	25
11	48	25
12	48	25
13	47	24
14	47	24
15	47	24
16	46	24
17	46	23
18	46	23
19	46	23
20	46	23
21	46	22
22	46	22
23	46	22
24	46	22
25	46	21
26	46	21
27	46	20
28	45	20
29	45	19
30	45	19

	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	4	0
2	4	0
3	4	0
4	4	0
5	4	0
6	4	0
7	4	0
8	4	0
9	4	0
10	4	-1
11	4	-1
12	4	-1
13	4	-1
14	4	-1
15	4	-1
16	4	-1
17	4	-1
18	4	-1
19	4	-1
20	4	-1
21	4	-1
22	4	0
23	4	0
24	4	0
25	4	0
26	4	0
27	4	0
28	4	0
29	4	0
30	4	0

	Clearer (%)	Cloudier (%)
1	31	69
2	31	69
3	31	69
4	31	69
5	32	68
6	32	68
7	32	68
8	33	67
9	33	67
10	34	66
11	34	66
12	34	66
13	34	66
14	34	66
15	34	66
16	34	66
17	34	66
18	34	66
19	33	67
20	33	67
21	33	67
22	33	67
23	32	68
24	31	69
25	30	70
26	30	70
27	30	70
28	29	71
29	30	70
30	30	70

	Rain chance (%)	Snow chance (%)
1	49	24
2	49	24
3	49	24
4	49	25
5	49	25
6	49	25
7	49	25
8	49	25
9	49	25
10	48	25
11	48	25
12	48	25
13	47	24
14	47	24
15	47	24
16	46	24
17	46	23
18	46	23
19	46	23
20	46	23
21	46	22
22	46	22
23	46	22
24	46	22
25	46	21
26	46	21
27	46	20
28	45	20
29	45	19
30	45	19

	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