Jamestown weather in September
In September, Jamestown sees average daytime highs of 20°C and overnight lows near 19°C, with 1 mm of rain across 0.1 wet days and about 11.9 hours of daylight. It is the 12th-warmest and 9th-wettest month of the year here.
Day-to-day highs hold fairly steady near 20°C through the month. The sky is clear or mostly clear about 7% of the time in September, and the air most often feels comfortable.
Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Jamestown's 12th-clearest and 2nd-windiest month. For the whole year in context, see Jamestown's year-round climate.
- Daytime high
- 20°
- 12th warmest
- Overnight low
- 19°
- 1st coldest
- Rainfall
- 1 mm
- 0.1 wet days
- Daylight
- 11 h 54 min
- 6:20 AM – 6:15 PM
- Cloud cover
- 71%
- 12th clearest
- Wind
- 28 km/h
- 2nd windiest
- Solar energy
- 5.3 kWh/m²
- Travel score
- 7.3
- out of 10
Jamestown is capital of Saint Helena.
- Density
- 177/km²
- people per km²
- Founded
- 1659
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Day-to-day highs hold fairly steady near 20°C through the month.
A typical September day in Jamestown reaches about 20°C in the afternoon and slips back to 19°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 20°C. Set against its neighbours, September runs on par with August and on par with 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) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Avg low (°C) | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 20 | 19 |
| 2 | 20 | 19 |
| 3 | 20 | 19 |
| 4 | 20 | 19 |
| 5 | 20 | 19 |
| 6 | 20 | 19 |
| 7 | 20 | 19 |
| 8 | 20 | 19 |
| 9 | 20 | 19 |
| 10 | 20 | 19 |
| 11 | 20 | 19 |
| 12 | 20 | 19 |
| 13 | 20 | 19 |
| 14 | 20 | 19 |
| 15 | 20 | 19 |
| 16 | 20 | 19 |
| 17 | 20 | 19 |
| 18 | 20 | 19 |
| 19 | 20 | 19 |
| 20 | 20 | 19 |
| 21 | 20 | 19 |
| 22 | 20 | 19 |
| 23 | 20 | 19 |
| 24 | 20 | 19 |
| 25 | 20 | 19 |
| 26 | 20 | 19 |
| 27 | 20 | 19 |
| 28 | 20 | 19 |
| 29 | 20 | 19 |
| 30 | 20 | 19 |
Jamestown weather by month
How September compares with the rest of the year at a glance. September is the 12th-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 | 23° / 22° | 2 | 0.4 | 12.8 | 8.6 |
| Feb | 24° / 23° | 3 | 0.6 | 12.5 | 8.8 |
| Mar | 24° / 24° | 5 | 1.4 | 12.1 | 8.7 |
| Apr | 24° / 23° | 3 | 0.6 | 11.7 | 8.7 |
| May | 23° / 22° | 4 | 1.1 | 11.3 | 8.3 |
| Jun | 22° / 21° | 5 | 1.1 | 11.1 | 7.9 |
| Jul | 21° / 20° | 3 | 0.5 | 11.1 | 7.7 |
| Aug | 20° / 19° | 2 | 0.3 | 11.5 | 7.4 |
| Sep | 20° / 19° | 1 | 0.1 | 11.9 | 7.3 |
| Oct | 20° / 19° | 1 | 0.1 | 12.4 | 7.4 |
| Nov | 20° / 20° | 1 | 0 | 12.7 | 7.7 |
| Dec | 21° / 21° | 1 | 0 | 12.9 | 8.2 |
Cloud cover in September
The sky is clear or mostly clear about 7% of the time in September, the cloudiest month of the year.
Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 72%.
| 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 (%) | 26 | 26 | 26 | 27 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 28 |
| Cloudier (%) | 74 | 74 | 74 | 73 | 72 | 72 | 72 | 72 | 72 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 72 | 72 | 72 | 73 | 74 | 74 | 74 | 74 | 74 | 74 | 74 | 73 | 72 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 26 | 74 |
| 2 | 26 | 74 |
| 3 | 26 | 74 |
| 4 | 27 | 73 |
| 5 | 28 | 72 |
| 6 | 28 | 72 |
| 7 | 28 | 72 |
| 8 | 28 | 72 |
| 9 | 28 | 72 |
| 10 | 29 | 71 |
| 11 | 29 | 71 |
| 12 | 29 | 71 |
| 13 | 29 | 71 |
| 14 | 29 | 71 |
| 15 | 29 | 71 |
| 16 | 29 | 71 |
| 17 | 29 | 71 |
| 18 | 28 | 72 |
| 19 | 28 | 72 |
| 20 | 28 | 72 |
| 21 | 27 | 73 |
| 22 | 26 | 74 |
| 23 | 26 | 74 |
| 24 | 26 | 74 |
| 25 | 26 | 74 |
| 26 | 26 | 74 |
| 27 | 26 | 74 |
| 28 | 26 | 74 |
| 29 | 27 | 73 |
| 30 | 28 | 72 |
Chance of precipitation in September
Jamestown gets around 1 mm of rain over 0.1 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 0% and peaks near 1% 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 (%) | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rain chance (%) | |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 1 |
| 13 | 1 |
| 14 | 1 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | 0 |
| 20 | 0 |
| 21 | 0 |
| 22 | 0 |
| 23 | 0 |
| 24 | 0 |
| 25 | 0 |
| 26 | 0 |
| 27 | 0 |
| 28 | 0 |
| 29 | 0 |
| 30 | 0 |
Humidity in September
Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the comfortable band about 77% 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 (%) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 |
| Comfortable (%) | 82 | 81 | 80 | 80 | 80 | 79 | 79 | 79 | 79 | 79 | 79 | 78 | 78 | 78 | 78 | 78 | 77 | 77 | 77 | 77 | 77 | 77 | 76 | 75 | 76 | 75 | 74 | 73 | 72 | 71 |
| Humid (%) | 15 | 16 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 20 | 21 | 21 | 22 | 23 | 23 | 24 | 25 | 26 | 27 | 28 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| 1 | 3 | 82 | 15 |
| 2 | 3 | 81 | 16 |
| 3 | 3 | 80 | 17 |
| 4 | 3 | 80 | 17 |
| 5 | 3 | 80 | 17 |
| 6 | 3 | 79 | 18 |
| 7 | 3 | 79 | 18 |
| 8 | 3 | 79 | 18 |
| 9 | 3 | 79 | 18 |
| 10 | 3 | 79 | 18 |
| 11 | 3 | 79 | 18 |
| 12 | 3 | 78 | 19 |
| 13 | 3 | 78 | 19 |
| 14 | 3 | 78 | 19 |
| 15 | 3 | 78 | 19 |
| 16 | 3 | 78 | 19 |
| 17 | 3 | 77 | 20 |
| 18 | 3 | 77 | 20 |
| 19 | 3 | 77 | 20 |
| 20 | 3 | 77 | 20 |
| 21 | 2 | 77 | 21 |
| 22 | 2 | 77 | 21 |
| 23 | 2 | 76 | 22 |
| 24 | 2 | 75 | 23 |
| 25 | 1 | 76 | 23 |
| 26 | 1 | 75 | 24 |
| 27 | 1 | 74 | 25 |
| 28 | 1 | 73 | 26 |
| 29 | 1 | 72 | 27 |
| 30 | 1 | 71 | 28 |
Wind in September
Winds average 28 km/h in September.
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
Daylight runs from about 11 h 42 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 24 minutes over September. Sunrise moves from 6:32 AM to 6:08 AM, and sunset from 6:13 PM to 6:16 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) | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 |
| Sunrise (AM) | 6:32 | 6:31 | 6:30 | 6:30 | 6:29 | 6:28 | 6:27 | 6:26 | 6:26 | 6:25 | 6:24 | 6:23 | 6:22 | 6:22 | 6:21 | 6:20 | 6:19 | 6:18 | 6:17 | 6:17 | 6:16 | 6:15 | 6:14 | 6:13 | 6:12 | 6:12 | 6:11 | 6:10 | 6:09 | 6:08 |
| Sunset (PM) | 6:13 | 6:13 | 6:13 | 6:13 | 6:14 | 6:14 | 6:14 | 6:14 | 6:14 | 6:14 | 6:14 | 6:14 | 6:14 | 6:14 | 6:14 | 6:15 | 6:15 | 6:15 | 6:15 | 6:15 | 6:15 | 6:15 | 6:15 | 6:15 | 6:15 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.7 | 6:32 | 6:13 |
| 2 | 11.7 | 6:31 | 6:13 |
| 3 | 11.7 | 6:30 | 6:13 |
| 4 | 11.7 | 6:30 | 6:13 |
| 5 | 11.7 | 6:29 | 6:14 |
| 6 | 11.8 | 6:28 | 6:14 |
| 7 | 11.8 | 6:27 | 6:14 |
| 8 | 11.8 | 6:26 | 6:14 |
| 9 | 11.8 | 6:26 | 6:14 |
| 10 | 11.8 | 6:25 | 6:14 |
| 11 | 11.8 | 6:24 | 6:14 |
| 12 | 11.9 | 6:23 | 6:14 |
| 13 | 11.9 | 6:22 | 6:14 |
| 14 | 11.9 | 6:22 | 6:14 |
| 15 | 11.9 | 6:21 | 6:14 |
| 16 | 11.9 | 6:20 | 6:15 |
| 17 | 11.9 | 6:19 | 6:15 |
| 18 | 11.9 | 6:18 | 6:15 |
| 19 | 12.0 | 6:17 | 6:15 |
| 20 | 12.0 | 6:17 | 6:15 |
| 21 | 12.0 | 6:16 | 6:15 |
| 22 | 12.0 | 6:15 | 6:15 |
| 23 | 12.0 | 6:14 | 6:15 |
| 24 | 12.0 | 6:13 | 6:15 |
| 25 | 12.0 | 6:12 | 6:15 |
| 26 | 12.1 | 6:12 | 6:16 |
| 27 | 12.1 | 6:11 | 6:16 |
| 28 | 12.1 | 6:10 | 6:16 |
| 29 | 12.1 | 6:09 | 6:16 |
| 30 | 12.1 | 6:08 | 6:16 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 5.3 kWh/m².
For context, solar energy here swings from a low near 3.89 kWh/m² to a high of 7.11 kWh/m² in January across the year — September's 5.3 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) | 4.9 | 5.0 | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 | 5.1 | 5.2 | 5.2 | 5.2 | 5.2 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.6 | 5.6 | 5.6 |
| 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 | 4.9 | Bright |
| 2 | 5.0 | Bright |
| 3 | 5.0 | Bright |
| 4 | 5.0 | Bright |
| 5 | 5.0 | Bright |
| 6 | 5.1 | Bright |
| 7 | 5.1 | Bright |
| 8 | 5.1 | Bright |
| 9 | 5.2 | Bright |
| 10 | 5.2 | Bright |
| 11 | 5.2 | Bright |
| 12 | 5.2 | Bright |
| 13 | 5.3 | Bright |
| 14 | 5.3 | Bright |
| 15 | 5.3 | Bright |
| 16 | 5.3 | Bright |
| 17 | 5.3 | Bright |
| 18 | 5.4 | Bright |
| 19 | 5.4 | Bright |
| 20 | 5.4 | Bright |
| 21 | 5.4 | Bright |
| 22 | 5.4 | Bright |
| 23 | 5.5 | Bright |
| 24 | 5.5 | Bright |
| 25 | 5.5 | Bright |
| 26 | 5.5 | Bright |
| 27 | 5.5 | Bright |
| 28 | 5.6 | Bright |
| 29 | 5.6 | Bright |
| 30 | 5.6 | Bright |
Is September a good time to visit Jamestown?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is one of the better times to visit Jamestown for general sightseeing.
What to pack for Jamestown in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Jamestown sees daytime highs around 20°C and nights near 19°C. Pack a windbreaker. Worth having: sun protection.
Sea temperature near Jamestown in September
The nearest coast averages about 20°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 25°C and coldest in October near 20°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 23 | 24 | 25 | 25 | 24 | 23 | 22 | 21 | 20 | 20 | 21 | 22 |
| Comfort | Refreshing | Warm | Warm | Warm | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 23 | Refreshing |
| Feb | 24 | Warm |
| Mar | 25 | Warm |
| Apr | 25 | Warm |
| May | 24 | Refreshing |
| Jun | 23 | Refreshing |
| Jul | 22 | Refreshing |
| Aug | 21 | Refreshing |
| Sep | 20 | Refreshing |
| Oct | 20 | Refreshing |
| Nov | 21 | Refreshing |
| Dec | 22 | Refreshing |
UV index in Jamestown in September
Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Jamestown peaks around January 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 8 (very high).
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) | 14 | 13 | 13 | 11 | 9 | 8 | 8 | 8 | 10 | 11 | 13 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 13 | Extreme |
| Mar | 13 | Extreme |
| Apr | 11 | Extreme |
| May | 9 | Very high |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 8 | Very high |
| Sep | 10 | Very high |
| Oct | 11 | Extreme |
| Nov | 13 | Extreme |
| Dec | 12 | Extreme |
Where is Jamestown?
Jamestown sits at 15.9°S, 5.7°W, 10 m above sea level, in Saint Helena. The nearest listed city is Tômbua, 1,878 km away.
Topography around Jamestown
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Jamestown.
Within 3 km, the terrain around Jamestown has significant variations in elevation — a maximum elevation change of 581 m around an average of 155 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 795 m; within 80 km, large variations in elevation — a maximum elevation change of 766 m.
The land around Jamestown is covered by water (44%) and shrubs (27%) within 3 km, water (85%) within 16 km, and water (97%) within 80 km.
Saint Helena travel facts
- Power plugs
- Type G
- 230 V · 50 Hz
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 Jamestown (-15.9249°, -5.7182°, elevation 10 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).