SeasonMapJamestown weather in December
Saint Helena
December in Jamestown: nice, dry, with clean air — an excellent time to visit.
#7 of 12 months in Jamestown · #71 of 1383 destinations to visit in December · comfort 91/100 (tier S)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Jamestown in December
No notes yet. Open Jamestown on the map to add the first one.
Jamestown climate normals — December
| Daytime high | 22°C / 71°F | 😎 nice |
|---|---|---|
| Nighttime low | 21°C / 70°F | |
| Sea temperature | 23°C / 73°F | 🙂 pleasant |
| Rainfall | 3 mm / 0.1 in | ☀️ dry |
| Rainy days | 1 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 18°C / 64°F | |
| Sunshine | 12 h/day | |
| Daylight | 13.1 h | |
| Wind | 30 km/h / 18 mph | |
| Air quality (US AQI) | 49 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Jamestown in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 5 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Jamestown's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherJamestown's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in Jamestown in December
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Humpback whales
15 Jun – 15 Dec · usuallyWhale seasonHumpbacks use the island's waters through the southern winter and spring, with mothers and calves close in along the lee coast. Sightings are opportunistic rather than scheduled.
Where is Jamestown?
Jamestown in December — FAQ
- Is December a good time to visit Jamestown?
- December in Jamestown: nice, dry, with clean air — an excellent time to visit. It ranks #7 of 12 months for Jamestown on SeasonMap's comfort score (91/100).
- What is the weather like in Jamestown in December?
- In December, Jamestown averages a daily high of 21.7°C and a low of 21°C, with about 3 mm of rain over roughly 0.6 rainy days.
- What is the air quality in Jamestown in December?
- Jamestown has a mean US Air Quality Index of about 49 in December.