Jamestown weather in January
In January, Jamestown sees average daytime highs of 23°C and overnight lows near 22°C, with 2 mm of rain across 0.4 wet days and about 12.8 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.
Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 51% of the time in January, and the air most often feels muggy.
Daylight stretches from about 12 h 54 min at the start of January to 12 h 42 min by month's end. Set against the rest of the year, January is Jamestown's 2nd-clearest and 11th-windiest month. For the whole year in context, see Jamestown's year-round climate.
- Daytime high
- 23°
- 5th warmest
- Overnight low
- 22°
- 8th coldest
- Rainfall
- 2 mm
- 0.4 wet days
- Daylight
- 12 h 54 min
- 6:07 AM – 6:58 PM
- Cloud cover
- 41%
- 2nd clearest
- Wind
- 24 km/h
- 11th windiest
- Solar energy
- 7.11 kWh/m²
- Travel score
- 8.6
- 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 January
Day-to-day highs hold fairly steady near 23°C through the month.
A typical January day in Jamestown reaches about 23°C in the afternoon and slips back to 22°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 24°C. Set against its neighbours, January runs about 1°C warmer than December and about 1°C cooler than February.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg low (°C) | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 22 | 21 |
| 2 | 22 | 21 |
| 3 | 22 | 21 |
| 4 | 22 | 22 |
| 5 | 22 | 22 |
| 6 | 22 | 22 |
| 7 | 22 | 22 |
| 8 | 22 | 22 |
| 9 | 22 | 22 |
| 10 | 23 | 22 |
| 11 | 23 | 22 |
| 12 | 23 | 22 |
| 13 | 23 | 22 |
| 14 | 23 | 22 |
| 15 | 23 | 22 |
| 16 | 23 | 22 |
| 17 | 23 | 22 |
| 18 | 23 | 22 |
| 19 | 23 | 22 |
| 20 | 23 | 22 |
| 21 | 23 | 22 |
| 22 | 23 | 22 |
| 23 | 23 | 22 |
| 24 | 23 | 22 |
| 25 | 23 | 22 |
| 26 | 23 | 23 |
| 27 | 23 | 23 |
| 28 | 23 | 23 |
| 29 | 23 | 23 |
| 30 | 23 | 23 |
| 31 | 23 | 23 |
Jamestown weather by month
How January compares with the rest of the year at a glance. January is the 5th-warmest and 7th-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 January
The sky is clear or mostly clear about 51% of the time in January.
Beyond those clear spells, partly cloudy skies cover about 35% of January, with mostly cloudy or overcast conditions the remaining 14%. Skies tend to open up 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 82 | 82 | 82 | 83 | 83 | 83 | 84 | 84 | 85 | 86 | 87 | 87 | 88 | 89 | 89 | 89 | 89 | 89 | 89 | 89 | 88 | 88 | 87 | 87 | 87 | 85 | 85 | 84 | 84 | 83 | 83 |
| Cloudier (%) | 18 | 18 | 18 | 17 | 17 | 17 | 16 | 16 | 15 | 14 | 13 | 13 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 13 | 13 | 13 | 15 | 15 | 16 | 16 | 17 | 17 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 82 | 18 |
| 2 | 82 | 18 |
| 3 | 82 | 18 |
| 4 | 83 | 17 |
| 5 | 83 | 17 |
| 6 | 83 | 17 |
| 7 | 84 | 16 |
| 8 | 84 | 16 |
| 9 | 85 | 15 |
| 10 | 86 | 14 |
| 11 | 87 | 13 |
| 12 | 87 | 13 |
| 13 | 88 | 12 |
| 14 | 89 | 11 |
| 15 | 89 | 11 |
| 16 | 89 | 11 |
| 17 | 89 | 11 |
| 18 | 89 | 11 |
| 19 | 89 | 11 |
| 20 | 89 | 11 |
| 21 | 88 | 12 |
| 22 | 88 | 12 |
| 23 | 87 | 13 |
| 24 | 87 | 13 |
| 25 | 87 | 13 |
| 26 | 85 | 15 |
| 27 | 85 | 15 |
| 28 | 84 | 16 |
| 29 | 84 | 16 |
| 30 | 83 | 17 |
| 31 | 83 | 17 |
Chance of precipitation in January
Jamestown gets around 2 mm of rain over 0.4 wet days in January. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 1% and peaks near 2% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Rain chance (%) | |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 1 |
| 13 | 1 |
| 14 | 1 |
| 15 | 1 |
| 16 | 1 |
| 17 | 1 |
| 18 | 1 |
| 19 | 1 |
| 20 | 1 |
| 21 | 1 |
| 22 | 2 |
| 23 | 2 |
| 24 | 2 |
| 25 | 2 |
| 26 | 2 |
| 27 | 2 |
| 28 | 2 |
| 29 | 2 |
| 30 | 2 |
| 31 | 2 |
Humidity in January
Most of January feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, January lands in the muggy band about 52% of days. Sticky, muggy-or-worse air turns up on roughly 53% of them.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 3 | 2 | 2 | 2 | 2 | 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 |
| Humid (%) | 66 | 65 | 63 | 62 | 60 | 60 | 59 | 57 | 56 | 54 | 53 | 52 | 50 | 49 | 48 | 47 | 45 | 44 | 42 | 41 | 39 | 38 | 36 | 35 | 34 | 33 | 32 | 31 | 30 | 30 | 29 |
| Muggy (%) | 31 | 33 | 35 | 36 | 38 | 39 | 40 | 42 | 43 | 45 | 46 | 47 | 49 | 50 | 51 | 53 | 55 | 56 | 58 | 59 | 61 | 62 | 64 | 64 | 65 | 66 | 67 | 67 | 68 | 68 | 69 |
| Oppressive (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|
| 1 | 3 | 66 | 31 | 0 |
| 2 | 2 | 65 | 33 | 0 |
| 3 | 2 | 63 | 35 | 0 |
| 4 | 2 | 62 | 36 | 0 |
| 5 | 2 | 60 | 38 | 0 |
| 6 | 1 | 60 | 39 | 0 |
| 7 | 1 | 59 | 40 | 0 |
| 8 | 1 | 57 | 42 | 0 |
| 9 | 1 | 56 | 43 | 0 |
| 10 | 1 | 54 | 45 | 0 |
| 11 | 1 | 53 | 46 | 0 |
| 12 | 1 | 52 | 47 | 0 |
| 13 | 1 | 50 | 49 | 0 |
| 14 | 1 | 49 | 50 | 0 |
| 15 | 1 | 48 | 51 | 0 |
| 16 | 0 | 47 | 53 | 0 |
| 17 | 0 | 45 | 55 | 0 |
| 18 | 0 | 44 | 56 | 0 |
| 19 | 0 | 42 | 58 | 0 |
| 20 | 0 | 41 | 59 | 0 |
| 21 | 0 | 39 | 61 | 0 |
| 22 | 0 | 38 | 62 | 0 |
| 23 | 0 | 36 | 64 | 0 |
| 24 | 0 | 35 | 64 | 1 |
| 25 | 0 | 34 | 65 | 1 |
| 26 | 0 | 33 | 66 | 1 |
| 27 | 0 | 32 | 67 | 1 |
| 28 | 0 | 31 | 67 | 2 |
| 29 | 0 | 30 | 68 | 2 |
| 30 | 0 | 30 | 68 | 2 |
| 31 | 0 | 29 | 69 | 2 |
Wind in January
Winds average 24 km/h in January.
Across January, daily wind ranges from about 23 km/h on the calmest days to 24 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| 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 | breezy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 24 | breezy |
| 2 | 24 | breezy |
| 3 | 24 | breezy |
| 4 | 24 | breezy |
| 5 | 24 | breezy |
| 6 | 24 | breezy |
| 7 | 24 | breezy |
| 8 | 24 | breezy |
| 9 | 24 | breezy |
| 10 | 24 | breezy |
| 11 | 24 | breezy |
| 12 | 24 | breezy |
| 13 | 24 | breezy |
| 14 | 24 | breezy |
| 15 | 24 | breezy |
| 16 | 24 | breezy |
| 17 | 24 | breezy |
| 18 | 23 | breezy |
| 19 | 23 | breezy |
| 20 | 23 | breezy |
| 21 | 23 | breezy |
| 22 | 23 | breezy |
| 23 | 23 | breezy |
| 24 | 23 | breezy |
| 25 | 23 | breezy |
| 26 | 23 | breezy |
| 27 | 23 | breezy |
| 28 | 23 | breezy |
| 29 | 23 | breezy |
| 30 | 23 | breezy |
| 31 | 23 | breezy |
Sunrise & sunset in January
Daylight runs from about 12 h 54 min at the start of January to 12 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 12 minutes over January. Sunrise moves from 5:58 AM to 6:15 AM, and sunset from 6:54 PM to 6:58 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.7 | 12.7 | 12.7 | 12.7 |
| Sunrise (AM) | 5:58 | 5:59 | 5:59 | 6:00 | 6:00 | 6:01 | 6:01 | 6:02 | 6:03 | 6:03 | 6:04 | 6:04 | 6:05 | 6:05 | 6:06 | 6:07 | 6:07 | 6:08 | 6:08 | 6:09 | 6:09 | 6:10 | 6:11 | 6:11 | 6:12 | 6:12 | 6:13 | 6:13 | 6:14 | 6:14 | 6:15 |
| Sunset (PM) | 6:54 | 6:54 | 6:55 | 6:55 | 6:55 | 6:56 | 6:56 | 6:56 | 6:56 | 6:57 | 6:57 | 6:57 | 6:57 | 6:57 | 6:58 | 6:58 | 6:58 | 6:58 | 6:58 | 6:58 | 6:58 | 6:58 | 6:58 | 6:58 | 6:58 | 6:58 | 6:58 | 6:58 | 6:58 | 6:58 | 6:58 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.9 | 5:58 | 6:54 |
| 2 | 12.9 | 5:59 | 6:54 |
| 3 | 12.9 | 5:59 | 6:55 |
| 4 | 12.9 | 6:00 | 6:55 |
| 5 | 12.9 | 6:00 | 6:55 |
| 6 | 12.9 | 6:01 | 6:56 |
| 7 | 12.9 | 6:01 | 6:56 |
| 8 | 12.9 | 6:02 | 6:56 |
| 9 | 12.9 | 6:03 | 6:56 |
| 10 | 12.9 | 6:03 | 6:57 |
| 11 | 12.9 | 6:04 | 6:57 |
| 12 | 12.9 | 6:04 | 6:57 |
| 13 | 12.9 | 6:05 | 6:57 |
| 14 | 12.9 | 6:05 | 6:57 |
| 15 | 12.9 | 6:06 | 6:58 |
| 16 | 12.9 | 6:07 | 6:58 |
| 17 | 12.8 | 6:07 | 6:58 |
| 18 | 12.8 | 6:08 | 6:58 |
| 19 | 12.8 | 6:08 | 6:58 |
| 20 | 12.8 | 6:09 | 6:58 |
| 21 | 12.8 | 6:09 | 6:58 |
| 22 | 12.8 | 6:10 | 6:58 |
| 23 | 12.8 | 6:11 | 6:58 |
| 24 | 12.8 | 6:11 | 6:58 |
| 25 | 12.8 | 6:12 | 6:58 |
| 26 | 12.8 | 6:12 | 6:58 |
| 27 | 12.8 | 6:13 | 6:58 |
| 28 | 12.7 | 6:13 | 6:58 |
| 29 | 12.7 | 6:14 | 6:58 |
| 30 | 12.7 | 6:14 | 6:58 |
| 31 | 12.7 | 6:15 | 6:58 |
Solar energy in January
Average shortwave solar energy reaching the ground each day in January, about 7.11 kWh/m² — the sunniest month for solar.
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 — January's 7.11 kWh/m² sits near the top of that range.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 7.0 | 7.0 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 7.0 | Intense |
| 2 | 7.0 | Intense |
| 3 | 7.1 | Intense |
| 4 | 7.1 | Intense |
| 5 | 7.1 | Intense |
| 6 | 7.1 | Intense |
| 7 | 7.1 | Intense |
| 8 | 7.1 | Intense |
| 9 | 7.1 | Intense |
| 10 | 7.1 | Intense |
| 11 | 7.1 | Intense |
| 12 | 7.1 | Intense |
| 13 | 7.1 | Intense |
| 14 | 7.1 | Intense |
| 15 | 7.1 | Intense |
| 16 | 7.1 | Intense |
| 17 | 7.1 | Intense |
| 18 | 7.1 | Intense |
| 19 | 7.1 | Intense |
| 20 | 7.1 | Intense |
| 21 | 7.1 | Intense |
| 22 | 7.1 | Intense |
| 23 | 7.1 | Intense |
| 24 | 7.1 | Intense |
| 25 | 7.1 | Intense |
| 26 | 7.1 | Intense |
| 27 | 7.1 | Intense |
| 28 | 7.1 | Intense |
| 29 | 7.1 | Intense |
| 30 | 7.1 | Intense |
| 31 | 7.1 | Intense |
Is January a good time to visit Jamestown?
Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
January is one of the better times to visit Jamestown for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Jamestown in January
From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In January, Jamestown sees daytime highs around 23°C and nights near 22°C. Pack sun protection. Worth having: light clothes and a windbreaker.
Sea temperature near Jamestown in January
The nearest coast averages about 23°C in January — 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 January
Clear-sky midday UV in January peaks around 14 (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).