🇸🇭 Weather in Jamestown
Map Overlays:
Hourly Forecast for Jamestown
10:00
19°
20%
11:00
19°
14%
12:00
19°
15%
13:00
19°
18%
14:00
19°
17%
15:00
19°
18%
16:00
19°
17%
17:00
19°
16%
18:00
19°
13%
19:00
19°
15%
20:00
19°
19%
21:00
19°
18%
22:00
19°
11%
23:00
19°
15%
00:00
19°
19%
01:00
19°
18%
02:00
19°
18%
03:00
19°
16%
04:00
19°
16%
05:00
19°
18%
06:00
19°
17%
07:00
19°
8%
08:00
19°
14%
09:00
19°
13%
14-Day Forecast for Jamestown
2026-07-12
Patchy rain nearby
19° /
18°
2026-07-13
Patchy rain nearby
19° /
19°
2026-07-14
Partly Cloudy
20° /
19°
2026-07-15
Patchy rain nearby
19° /
19°
2026-07-16
Patchy rain nearby
19° /
19°
2026-07-17
Patchy rain nearby
19° /
18°
2026-07-18
Cloudy
19° /
18°
Additional Forecasts for Jamestown
Air Quality
💨 US EPA Index 1 (Good)
CO (Carbon Monoxide) 90.0 μg/m³
O₃ (Ozone) 84.0 μg/m³
SO₂ (Sulphur Dioxide) 0.2 μg/m³
PM2.5 (Fine particles) 11.6 μg/m³
PM10 (Coarse particles) 19.3 μg/m³
Historical Weather
Weather Forecasts for Other Cities in Saint Helena, Ascension and Tristan da Cunha
Weather in Jamestown — FAQ
Answers refreshed each request based on current conditions in Jamestown.
What is the weather like right now in Jamestown?
Right now in Jamestown, Saint Helena, Ascension and Tristan da Cunha the temperature is 18.4°C (feels like 9.2°C), with patchy rain nearby. Relative humidity is 76% and wind is 27.0 km/h.
What is today's high and low temperature in Jamestown?
Today's forecast high in Jamestown is 19.4°C and the overnight low is 18.4°C. The diurnal range — high minus low — depends on cloud cover; clear days swing more than overcast ones.
Will it rain in Jamestown today?
The chance of precipitation in Jamestown today is 41%. Forecast accuracy is highest within the next 6 hours and decreases steadily out to 14 days.
How often does the weather here update?
Current observations refresh every 15-60 minutes from the nearest monitoring stations operated by national meteorological agencies. The hourly forecast updates approximately every hour; the 7- and 14-day outlook is recomputed several times per day.
What does 'feels like' temperature mean?
Feels-like (apparent) temperature accounts for humidity, wind chill and direct sunshine — variables that change how the human body perceives heat or cold. On hot, humid days it can be 3-7°C above the actual reading; on cold windy days it can be 5-15°C below.
Why does the temperature in Jamestown differ from nearby cities?
Even short distances can change temperatures noticeably. Jamestown's reading reflects altitude, proximity to large bodies of water, urban heat island effects, and the exact location of the monitoring stations supplying the data. Coastal cities are typically milder and more humid than inland equivalents.