Grytviken weather in September

In September, Grytviken sees average daytime highs of -1°C and overnight lows near -4°C, with 113 mm of precipitation across 17.2 wet days and about 11.5 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near -1°C through the month. The sky is clear or mostly clear about 4% of the time in September, and the air most often feels dry.

Daylight stretches from about 10 h 30 min at the start of September to 12 h 36 min by month's end. Set against the rest of the year, September is Grytviken's 11th-clearest and 6th-windiest month. For the whole year in context, see Grytviken's year-round climate.

Daytime high: -1°; 9th warmest
Overnight low: -4°; 4th coldest
Precipitation: 113 mm; 17.2 wet days
Daylight: 11 h 36 min; 6:33 AM – 6:07 PM
Cloud cover: 84%; 11th clearest
Wind: 20 km/h; 6th windiest
Solar energy: 2.82 kWh/m²
Travel score: 0.0; out of 10

Grytviken is abandoned whaling station; settlement on the island of South Georgia–South Sandwich Islands.

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

← August Grytviken 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 -1°C through the month.

A typical September day in Grytviken reaches about -1°C in the afternoon and slips back to -4°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between -4°C and 1°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)	-2	-2	-2	-2	-2	-2	-2	-2	-2	-2	-2	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1
Avg low (°C)	-5	-5	-5	-5	-5	-5	-5	-5	-5	-5	-5	-5	-4	-4	-4	-4	-4	-4	-4	-4	-4	-4	-4	-4	-4	-4	-4	-4	-4	-4

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

How September really feels in Grytviken

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

27 feel bitter (≤ -10°C)

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

Grytviken weather by month

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

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)
Jan	3° / 0°	120	19.5	13.5	16.3
Feb	3° / 1°	115	18.1	11.3	14.7
Mar	3° / 0°	139	20.3	13.1	12.5
Apr	1° / -1°	131	19.2	16.3	10.3
May	-0° / -3°	119	19.2	18.7	8.3
Jun	-2° / -5°	115	17.8	19.4	7.2
Jul	-2° / -5°	118	18.4	20.8	7.6
Aug	-2° / -5°	121	18.9	21.1	9.3
Sep	-1° / -4°	113	17.2	19.3	11.5
Oct	-0° / -3°	109	18.5	18.3	13.8
Nov	1° / -2°	106	17.5	16.2	15.8
Dec	2° / -1°	108	19	16	16.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 88%.

	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 (%)	11	11	11	11	13	13	13	13	13	13	13	14	14	13	13	12	12	12	12	12	12	12	12	12	12	12	12	13	13	13
Cloudier (%)	89	89	89	89	87	87	87	87	87	87	87	86	86	87	87	88	88	88	88	88	88	88	88	88	88	88	88	87	87	87

	Clearer (%)	Cloudier (%)
1	11	89
2	11	89
3	11	89
4	11	89
5	13	87
6	13	87
7	13	87
8	13	87
9	13	87
10	13	87
11	13	87
12	14	86
13	14	86
14	13	87
15	13	87
16	12	88
17	12	88
18	12	88
19	12	88
20	12	88
21	12	88
22	12	88
23	12	88
24	12	88
25	12	88
26	12	88
27	12	88
28	13	87
29	13	87
30	13	87

Chance of precipitation in September

Any precipitationSnow

Grytviken gets around 113 mm of rain and snow over 17.2 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 58% and peaks near 60% on the wettest days, and about 19 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 (%)	58	58	58	58	58	58	59	59	59	60	60	60	60	60	60	60	60	60	59	59	58	57	57	56	55	55	54	54	54	54
Snow chance (%)	64	64	64	64	64	64	65	65	66	66	66	67	67	67	67	67	67	67	67	66	65	65	64	63	62	61	60	59	58	57

	Rain chance (%)	Snow chance (%)
1	58	64
2	58	64
3	58	64
4	58	64
5	58	64
6	58	64
7	59	65
8	59	65
9	59	66
10	60	66
11	60	66
12	60	67
13	60	67
14	60	67
15	60	67
16	60	67
17	60	67
18	60	67
19	59	67
20	59	66
21	58	65
22	57	65
23	57	64
24	56	63
25	55	62
26	55	61
27	54	60
28	54	59
29	54	58
30	54	57

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 20 km/h in September.

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 10 h 30 min at the start of September to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 126 minutes over September. Sunrise moves from 7:12 AM to 5:57 AM, and sunset from 5:40 PM to 6:34 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)	10.5	10.5	10.6	10.7	10.8	10.8	10.9	11.0	11.0	11.1	11.2	11.3	11.3	11.4	11.5	11.6	11.6	11.7	11.8	11.9	11.9	12.0	12.1	12.2	12.2	12.3	12.4	12.5	12.5	12.6
Sunrise (AM)	7:12	7:09	7:07	7:04	7:02	6:59	6:57	6:54	6:51	6:49	6:46	6:44	6:41	6:38	6:36	6:33	6:31	6:28	6:25	6:23	6:20	6:18	6:15	6:12	6:10	6:07	6:05	6:02	5:59	5:57
Sunset (PM)	5:40	5:41	5:43	5:45	5:47	5:49	5:51	5:53	5:54	5:56	5:58	6:00	6:02	6:04	6:06	6:07	6:09	6:11	6:13	6:15	6:17	6:19	6:21	6:22	6:24	6:26	6:28	6:30	6:32	6:34

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.5	7:12	5:40
2	10.5	7:09	5:41
3	10.6	7:07	5:43
4	10.7	7:04	5:45
5	10.8	7:02	5:47
6	10.8	6:59	5:49
7	10.9	6:57	5:51
8	11.0	6:54	5:53
9	11.0	6:51	5:54
10	11.1	6:49	5:56
11	11.2	6:46	5:58
12	11.3	6:44	6:00
13	11.3	6:41	6:02
14	11.4	6:38	6:04
15	11.5	6:36	6:06
16	11.6	6:33	6:07
17	11.6	6:31	6:09
18	11.7	6:28	6:11
19	11.8	6:25	6:13
20	11.9	6:23	6:15
21	11.9	6:20	6:17
22	12.0	6:18	6:19
23	12.1	6:15	6:21
24	12.2	6:12	6:22
25	12.2	6:10	6:24
26	12.3	6:07	6:26
27	12.4	6:05	6:28
28	12.5	6:02	6:30
29	12.5	5:59	6:32
30	12.6	5:57	6:34

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.82 kWh/m².

For context, solar energy here swings from a low near 0.56 kWh/m² to a high of 6.67 kWh/m² in December across the year — September's 2.82 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)	2.1	2.2	2.2	2.3	2.3	2.3	2.4	2.4	2.5	2.5	2.6	2.6	2.7	2.7	2.8	2.8	2.9	2.9	3.0	3.0	3.1	3.1	3.2	3.3	3.3	3.4	3.4	3.5	3.5	3.6
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	2.1	Moderate
2	2.2	Moderate
3	2.2	Moderate
4	2.3	Moderate
5	2.3	Moderate
6	2.3	Moderate
7	2.4	Moderate
8	2.4	Moderate
9	2.5	Moderate
10	2.5	Moderate
11	2.6	Moderate
12	2.6	Moderate
13	2.7	Moderate
14	2.7	Moderate
15	2.8	Moderate
16	2.8	Moderate
17	2.9	Moderate
18	2.9	Moderate
19	3.0	Moderate
20	3.0	Moderate
21	3.1	Moderate
22	3.1	Moderate
23	3.2	Moderate
24	3.3	Moderate
25	3.3	Moderate
26	3.4	Moderate
27	3.4	Moderate
28	3.5	Moderate
29	3.5	Moderate
30	3.6	Moderate

Planning a trip in September

Is September a good time to visit Grytviken?

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

0.0

Sightseeing

1st-best month of the year

—

Beach & pool

never really warm enough

September is a weaker month for outdoor sightseeing in Grytviken.

What to pack for Grytviken in September

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

In September, Grytviken sees daytime highs around -1°C and nights near -4°C. Pack a warm layer, a heavy coat and rain gear. About 17 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Grytviken in September

The nearest coast averages about 0°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 19 km away) is warmest in February at about 4°C and coldest in August near 0°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)	3	4	4	3	2	1	1	0	0	1	2	3
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	3	Bracing
Feb	4	Bracing
Mar	4	Bracing
Apr	3	Bracing
May	2	Bracing
Jun	1	Bracing
Jul	1	Bracing
Aug	0	Bracing
Sep	0	Bracing
Oct	1	Bracing
Nov	2	Bracing
Dec	3	Bracing

UV index in Grytviken in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Grytviken peaks around December 16 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near June 16 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	8	7	4	2	1	0	1	1	3	7	8	10
Level	Very high	Very high	Moderate	Moderate	Low	Low	Low	Low	Moderate	Very high	Very high	Very high

	UV index (midday)	Level
Jan	8	Very high
Feb	7	Very high
Mar	4	Moderate
Apr	2	Moderate
May	1	Low
Jun	0	Low
Jul	1	Low
Aug	1	Low
Sep	3	Moderate
Oct	7	Very high
Nov	8	Very high
Dec	10	Very high

Location & terrain

Where is Grytviken?

Grytviken sits at 54.3°S, 36.5°W, 4 m above sea level, in South Georgia and the South Sandwich Islands. The nearest listed city is Stanley, 1,452 km away.

Topography around Grytviken

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

Within 3 km, the terrain around Grytviken has significant variations in elevation — a maximum elevation change of 589 m around an average of 172 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,359 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,915 m.

The land around Grytviken is covered by bare terrain (59%) and water (24%) within 3 km, water (46%), snow and ice (24%) and bare terrain (22%) within 16 km, and water (76%) within 80 km.

3 km

589 m

bare terrain 59%

16 km

2,359 m

water 46%

80 km

2,915 m

water 76%

grasslandbare terrainsnow and icewaterwetlandmoss and lichen

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

September weather nearby: Stanley 1,452 km · Río Grande 2,022 km · Ushuaia 2,035 km · Puerto Deseado 2,161 km · Río Gallegos 2,193 km · Punta Arenas 2,244 km · Caleta Olivia 2,342 km · Pico Truncado 2,349 km

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Grytviken (-54.2811°, -36.5092°, elevation 4 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	-2	-5
2	-2	-5
3	-2	-5
4	-2	-5
5	-2	-5
6	-2	-5
7	-2	-5
8	-2	-5
9	-2	-5
10	-2	-5
11	-2	-5
12	-1	-5
13	-1	-4
14	-1	-4
15	-1	-4
16	-1	-4
17	-1	-4
18	-1	-4
19	-1	-4
20	-1	-4
21	-1	-4
22	-1	-4
23	-1	-4
24	-1	-4
25	-1	-4
26	-1	-4
27	-1	-4
28	-1	-4
29	-1	-4
30	-1	-4

	Clearer (%)	Cloudier (%)
1	11	89
2	11	89
3	11	89
4	11	89
5	13	87
6	13	87
7	13	87
8	13	87
9	13	87
10	13	87
11	13	87
12	14	86
13	14	86
14	13	87
15	13	87
16	12	88
17	12	88
18	12	88
19	12	88
20	12	88
21	12	88
22	12	88
23	12	88
24	12	88
25	12	88
26	12	88
27	12	88
28	13	87
29	13	87
30	13	87

	Rain chance (%)	Snow chance (%)
1	58	64
2	58	64
3	58	64
4	58	64
5	58	64
6	58	64
7	59	65
8	59	65
9	59	66
10	60	66
11	60	66
12	60	67
13	60	67
14	60	67
15	60	67
16	60	67
17	60	67
18	60	67
19	59	67
20	59	66
21	58	65
22	57	65
23	57	64
24	56	63
25	55	62
26	55	61
27	54	60
28	54	59
29	54	58
30	54	57

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

	Clearer (%)	Cloudier (%)
1	11	89
2	11	89
3	11	89
4	11	89
5	13	87
6	13	87
7	13	87
8	13	87
9	13	87
10	13	87
11	13	87
12	14	86
13	14	86
14	13	87
15	13	87
16	12	88
17	12	88
18	12	88
19	12	88
20	12	88
21	12	88
22	12	88
23	12	88
24	12	88
25	12	88
26	12	88
27	12	88
28	13	87
29	13	87
30	13	87

	Rain chance (%)	Snow chance (%)
1	58	64
2	58	64
3	58	64
4	58	64
5	58	64
6	58	64
7	59	65
8	59	65
9	59	66
10	60	66
11	60	66
12	60	67
13	60	67
14	60	67
15	60	67
16	60	67
17	60	67
18	60	67
19	59	67
20	59	66
21	58	65
22	57	65
23	57	64
24	56	63
25	55	62
26	55	61
27	54	60
28	54	59
29	54	58
30	54	57

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

	Clearer (%)	Cloudier (%)
1	11	89
2	11	89
3	11	89
4	11	89
5	13	87
6	13	87
7	13	87
8	13	87
9	13	87
10	13	87
11	13	87
12	14	86
13	14	86
14	13	87
15	13	87
16	12	88
17	12	88
18	12	88
19	12	88
20	12	88
21	12	88
22	12	88
23	12	88
24	12	88
25	12	88
26	12	88
27	12	88
28	13	87
29	13	87
30	13	87

	Rain chance (%)	Snow chance (%)
1	58	64
2	58	64
3	58	64
4	58	64
5	58	64
6	58	64
7	59	65
8	59	65
9	59	66
10	60	66
11	60	66
12	60	67
13	60	67
14	60	67
15	60	67
16	60	67
17	60	67
18	60	67
19	59	67
20	59	66
21	58	65
22	57	65
23	57	64
24	56	63
25	55	62
26	55	61
27	54	60
28	54	59
29	54	58
30	54	57

	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