August
Weather in St Helier for August 2025
Your guide to St Helier weather in August - trends and predictions
In general, the average temperature in St Helier at the beginning of August is 17.7 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 18 °C by the end of August.
The climate of St Helier in August is notably wet, with an average of 13 rainy days, and a total of 76.2 mm of precipitation.
Temperatures
Rain 🌧️
18
Dry days
13
Rainy days
0
Snow days
18°/16°
Temperatures
28 km/h
Avg max wind
79 %
Avg humidity
St Helier in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  18° | 2 18° | 3 18° | ||||
| 4  17° | 5  18° | 6 18° | 7 17° | 8  19° | 9 19° | 10 20° |
| 11 21° | 12 20° | 13 18° | 14 18° | 15  18° | 16  19° | 17 20° |
| 18 20° | 19 19° | 20 18° | 21 19° | 22 19° | 23 20° | 24 19° |
| 25  17° | 26 18° | 27 19° | 28 18° | 29 18° | 30 17° | 31 19° |
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Temperatures trend during August in St Helier
See the weather trend as well as the moving average line
August weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. | Moderate rain at times | 18° /17° | 5.2 mm | 5 | |
| 2 Aug. | Moderate rain at times | 18° /16° | 8.6 mm | 5 | |
| 3 Aug. | Moderate rain at times | 18° /16° | 3.2 mm | 4 | |
| 4 Aug. | Patchy rain possible | 17° /15° | 0.3 mm | 5 | |
| 5 Aug. | Heavy rain at times | 18° /16° | 1.7 mm | 5 | |
| 6 Aug. | Patchy rain possible | 18° /16° | 0.7 mm | 4 | |
| 7 Aug. | Patchy rain possible | 17° /16° | 0.6 mm | 4 | |
| 8 Aug. | Overcast | 19° /15° | 0.1 mm | 4 | |
| 9 Aug. | Overcast | 19° /16° | 0.3 mm | 4 | |
| 10 Aug. | Patchy rain possible | 20° /17° | 0.2 mm | 5 | |
| 11 Aug. | Moderate rain at times | 21° /17° | 0.7 mm | 5 | |
| 12 Aug. | Patchy rain possible | 20° /16° | 0.6 mm | 5 | |
| 13 Aug. | Patchy rain possible | 18° /16° | 0.4 mm | 5 | |
| 14 Aug. | Patchy rain possible | 18° /16° | 4.3 mm | 4 | |
| 15 Aug. | Sunny | 18° /16° | 0 mm | 5 | |
| 16 Aug. | Partly cloudy | 19° /16° | 0.3 mm | 5 | |
| 17 Aug. | Patchy rain possible | 20° /17° | 0.2 mm | 5 | |
| 18 Aug. | Moderate or heavy rain shower | 20° /16° | 3.3 mm | 5 | |
| 19 Aug. | Patchy rain possible | 19° /16° | 0.3 mm | 5 | |
| 20 Aug. | Patchy rain possible | 18° /16° | 1.7 mm | 4 | |
| 21 Aug. | Sunny | 19° /16° | 0.1 mm | 5 | |
| 22 Aug. | Partly cloudy | 19° /16° | 0.2 mm | 5 | |
| 23 Aug. | Sunny | 20° /16° | 1 mm | 5 | |
| 24 Aug. | Moderate or heavy rain shower | 19° /16° | 25.6 mm | 4 | |
| 25 Aug. | Cloudy | 17° /15° | 0.3 mm | 4 | |
| 26 Aug. | Light rain shower | 18° /16° | 2 mm | 4 | |
| 27 Aug. | Light rain shower | 19° /16° | 4 mm | 5 | |
| 28 Aug. | Light rain shower | 18° /17° | 1.4 mm | 5 | |
| 29 Aug. | Patchy rain possible | 18° /16° | 0.2 mm | 5 | |
| 30 Aug. | Patchy rain possible | 17° /15° | 0.3 mm | 4 | |
| 31 Aug. | Light rain shower | 19° /16° | 8.9 mm | 4 | |
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Important Notice
Our weather forecast for St Helier in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the St Helier forecast closer to your planned date for the most up-to-date weather information.
St Helier in August - FAQ
What are the expected maximum and minimum temperatures in St Helier during August?
During August, expect a variety of temperatures with highs around 18° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in St Helier during August?
Moderate rainfall is anticipated in St Helier during August, with a total of 76.2 mm spread over approximately 13 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in St Helier during August?
The average wind speed in St Helier during August is 28 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in St Helier
Explore the daily rainfall trends and prepare for St Heliers August weather 💧
UV exposure in St Helier during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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