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.
St Helier experiences an exceptionally high level of rainfall in August, with more than 20 rainy days on average.
Is August a good time to visit St Helier? check out the best time to travel to St Helier page.
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8
Dry days
23
Rainy days
0
Snow days
18°/16°
Temperatures
30 km/h
Avg max wind
81 %
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?
Significant rainfall exceeding 128.1 mm is expected in St Helier during August, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in St Helier during August?
The average wind speed in St Helier during August is 30 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to St Helier in August?
As you prepare for your trip to St Helier in August, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in St Helier, during August, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Layered Clothing: Light sweaters, long-sleeve shirts, light jackets, and comfortable pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Umbrellas/Raincoats: For rainy days
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Where is St Helier?Get accurate weather forecasts for St Helier, located at latitude 49.188 and longitude -2.105. Stay updated with localized weather information tailored for St Helier.
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