The climate of Jamestown
Jamestown harbors a tropical rainforest climate according to the Köppen climate classification. This island town, nestled in the middle of the South Atlantic Ocean, sees warm, tropical conditions, punctuated by plentiful rainfall throughout the year.
Upon inspection of the climate data, one sees that the temperatures largely remain consistent, with little fluctuation. The highest average recorded temperatures peak at 28°C (82.4°F), typically in
March. Meanwhile, the cooler months, especially from
June to
September, see a slight dip in temperatures, with averages ranging from 22°C (71.6°F) to 23°C (73.4°F). Nighttime lows follow a similar pattern, with the chilliest nights occurring from June to September, recording averages of 17°C (62.6°F). Conversely, the warmer months, particularly from
January to
April, experience lows standing at around 21°C (69.8°F) to 22°C (71.6°F).
In terms of precipitation, Jamestown's tropical status is reinforced by an abundance of rainfall. The wettest period comes around March, with an average rainfall of 20mm (0.79"). Surprisingly, rainfall tends to significantly decline in
November, with barely any to no rainfall, followed by
December's 3mm (0.12") precipitation. The maximum daylight also fluctuates over the year; the island basking in approximately 13.1 hours of daylight at the year-end, while the shortest days, between June and
July, experiencing around 11.2 to 11.3 daylight hours.
The best time to visit Jamestown
Considering the temperate, consistent climate, there isn’t necessarily a specific "best" time to visit
Jamestown. That said, those comfortable with warmer climates would find the period from
January to
April most accommodating. During this period, daily highs stand at an inviting 27°C (80.6°F) to 28°C (82.4°F), with lows between 21°C (69.8°F) and 22°C (71.6°F). Meanwhile, the rainfall remains relatively subdued, making for comfortable, warm days, without the concern of frequent rains.
The worst time to visit Jamestown
Despite the warm, tropical allure, potential visitors should be wary during the month of
March. Despite presenting a high average temperature of 28°C (82.4°F), the amount of rainfall also tends to peak at 20mm (0.79") during this month. The increased humidity and a relatively high likelihood of encountering wet weather might make it less desirable for some tourists.
Spring weather in Jamestown
In
Jamestown, spring months span from
September to
November and usually indicate a transition towards the slightly warmer side of the climate spectrum. Throughout this period, average high temperatures gradually increase from 22°C (71.6°F) to 23°C (73.4°F) in November. Despite this upward trend in temperatures, rainfall significantly decreases, with November standing out as the driest month, reporting virtually no rainfall.
Summer weather in Jamestown
The summer months of
December through
February see the temperatures at a comfortable average between 23°C (73.4°F) and 27°C (80.6°F). Often, the temperatures hardly dip below 18°C (64.4°F) to 21°C (69.8°F) at night. Rainfall is minimal to moderate, ensuring relatively dry, warm conditions that define the summer experience in
Jamestown.
Autumn weather in Jamestown
Experiencing autumn in
Jamestown from
March to
May entails seeing an average high temperature of 27°C (80.6°F) to 24°C (75.2°F). Minimum temperatures never fall below 21°C (69.8°F). While March records the highest rainfall of the year at 20mm (0.79"), it gradually decreases to a moderate 18mm (0.71") by May.
Winter weather in Jamestown
Winter, spanning from
June to
August, reveals cooler climes. Temperatures vary from 22°C (71.6°F) to 23°C (73.4°F) during the day while plunging down to 17°C (62.6°F) at night. Despite being slightly cooler than other months, rainfall remains moderate with averages measuring between 8mm (0.31") and 10mm (0.39"), ensuring a distinctly mild, tropical winter in
Jamestown.
Weather in January
Known as the heart of the Southern Hemisphere summer,
January is typically hot in
Jamestown, Saint Helena, Ascension, and Tristan da Cunha. The warmth is balanced against the fresh ocean breezes that people often associate with the quintessential island experience.
Weather in January »Weather in February
In
February, the climate remains quite consistent with that of the previous month, showing a typical continuity of the summer season. The days continue to be warm and long, inviting outdoor activities and beach ventures. The weather conditions do not change dramatically, ensuring a steady flow of tourists during this period.
Weather in February »Weather in March
The tropical influence over the
March weather is accompanied by an escalation of rainfall up to 20mm (0.79") while sustaining the previous months' highest temperature at 28°C (82.4°F). This is a period of transition, shifting from the continuous heat of summer towards the early signs of the cooler season.
Weather in March »
Weather in April
Moving into the autumn season,
April ushers in a noticeable decline in temperatures and rainfall in
Jamestown, Saint Helena, Ascension, and Tristan da Cunha. The shift in temperature begins to signal the onset of cooler times while exhibiting a modest decrease in precipitation.
Weather in April »Weather in May
May signifies the true arrival of autumn in this part of the world, bringing in the lower temperatures and noticeable changes to the local flora. Prevalent in this season is the blend of both sunshine and rainfall, creating an array of rainbows that dot the overhead skies.
Weather in May » Weather in June
When
June arrives, residents and visitors have fully embraced the cooler conditions in
Jamestown and its associated islands. Outdoor enthusiasts find the atmosphere optimal for exploration and terrain trekking without the scorching heat of the summer months.
Weather in June »
Weather in July
July’s weather casts a calm and tranquil vibe over
Jamestown, Saint Helena, Ascension, and Tristan da Cunha. It's a time where locals welcome the intermingling of cold fronts and clear skies. While rainfall becomes more frequent, reaching 8mm (0.31"), the region's natural allure remains undiminished for the wildlife and visitors.
Weather in July » Weather in August
Weather in
August evokes a sense of ever-changing meteorological dynamics as the transition from winter to spring begins. Sporadic showers intersperse with warm spells, bestowing awe-inspiring landscapes. The potential for incredible photography is high during this period, courtesy of the contrasting elements of sun, rain, and unique flora.
Weather in August »Weather in September
September ushers a new lease of life to these South Atlantic islands, flourishing with the onset of spring. A gentler 5mm (0.2") rainfall allows the petals to unfurl and the leathery leaves to shine in verdant hues. Appearances of rainbows become more frequent, curving over the island landscape against the backdrop of fewer scattered clouds.
Weather in September »
Weather in October
October is routinely distinguished by its flowers' full bloom and a barely-there 3mm (0.12") rainfall. The pleasant weather, coupled with wandering wildlife, creates an intriguing spectacle for nature lovers. Mild nights, warm days, and gentle breezes are the hallmarks of October in
Jamestown and its surrounding islands.
Weather in October » Weather in November
In
November, the fine weather shows no signs of cessation, making the island an appealing destination for visitors. The climate defines the quintessential pre-summer conditions, marked by sunshine and long daylight hours. The minimal rainfall of 0mm (0") assists the transition from spring to summer, providing the perfect blend of warmth and light.
Weather in November »Weather in December
As the chapter of the year comes to a close,
Jamestown, Saint Helena, Ascension, and Tristan da Cunha bask in the full glow of the Southern Hemisphere’s summer. The weather in
December is typically warm and inviting, characterized by longer days and higher temperatures soaring up to 24°C (75.2°F).
Weather in December »