Barometric Pressure in Jamestown, Saint Helena, Ascension and Tristan da Cunha 
1017 hPa
19.6 ℃
76%
5.84 m/s
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The average pressure in Jamestown, St. Helena, Saint Helena, Ascension and Tristan da Cunha today is , which is considered normal. Pressure is trending rising.
Weather prediction: Fairly fine, possible showers early
The daily total fluctuation in pressure in Jamestown is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Jamestown hour by hour across the next 6 hourly readings.
The barometric pressure in Jamestown, Saint Helena, Ascension and Tristan da Cunha tends to be generally stable throughout the year. It ranges between 1015 and 1025 millibars. The weather in Jamestown is influenced by the trade winds and the seasons are not extreme. Summers are warm and winters are mild.
Jamestown is located in a valley, surrounded by steep mountainous terrain. This landscape acts as a barrier to the wind and helps maintain stable atmospheric pressure. The high peaks create a windbreak effect, protecting the town from strong gusts. As a result, the barometric pressure in Jamestown remains relatively constant, making it a pleasant place to experience consistent weather patterns.