Weather in Isle of Man for September 2025
In general, the average temperature in Isle of Man at the beginning of September is 16.9 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 14 °C by the end of September.
Expect significant rainfall in Isle of Man during September, with an average of 18 rainy days.
Is September a good time to visit Isle of Man? check out the best time to travel to Isle of Man page.
- New! Chat with our AI weatherman - it’s amazing and free.
Isle of Man in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  16° | 2  17° | 3 15° | 4  16° | 5  18° | 6 18° | 7  18° |
| 8 17° | 9  17° | 10  16° | 11  14° | 12 14° | 13 14° | 14  15° |
| 15 14° | 16 14° | 17 16° | 18 15° | 19 16° | 20 17° | 21 15° |
| 22 15° | 23 14° | 24  15° | 25 13° | 26 14° | 27 14° | 28 14° |
| 29 14° | 30 14° |
You can click on date
Temperatures trend during September in Isle of Man
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 16° /14° | 2.5 mm | 4 | |
| 2 Sept. | Overcast | 17° /13° | 2.8 mm | 4 | |
| 3 Sept. | Overcast | 15° /13° | 0.3 mm | 4 | |
| 4 Sept. | Sunny | 16° /13° | 0.9 mm | 4 | |
| 5 Sept. | Partly cloudy | 18° /13° | 0.1 mm | 5 | |
| 6 Sept. | Partly cloudy | 18° /14° | 0 mm | 5 | |
| 7 Sept. | Patchy light rain with thunder | 18° /15° | 6.5 mm | 4 | |
| 8 Sept. | Partly cloudy | 17° /14° | 0.5 mm | 5 | |
| 9 Sept. | Mist | 17° /14° | 0.1 mm | 4 | |
| 10 Sept. | Moderate rain at times | 16° /13° | 6.3 mm | 4 | |
| 11 Sept. | Light rain | 14° /12° | 5.5 mm | 4 | |
| 12 Sept. | Sunny | 14° /11° | 1.8 mm | 4 | |
| 13 Sept. | Overcast | 14° /11° | 0.7 mm | 4 | |
| 14 Sept. | Cloudy | 15° /13° | 0.2 mm | 4 | |
| 15 Sept. | Overcast | 14° /13° | 0.9 mm | 3 | |
| 16 Sept. | Light rain shower | 14° /11° | 3.2 mm | 4 | |
| 17 Sept. | Light rain | 16° /13° | 5.7 mm | 5 | |
| 18 Sept. | Patchy light drizzle | 15° /12° | 2.5 mm | 5 | |
| 19 Sept. | Light rain | 16° /12° | 5.9 mm | 5 | |
| 20 Sept. | Patchy light rain | 17° /13° | 2.6 mm | 5 | |
| 21 Sept. | Light rain shower | 15° /12° | 0.7 mm | 4 | |
| 22 Sept. | Light rain shower | 15° /12° | 1.6 mm | 4 | |
| 23 Sept. | Patchy rain possible | 14° /11° | 3.7 mm | 3 | |
| 24 Sept. | Moderate rain | 15° /12° | 9.6 mm | 4 | |
| 25 Sept. | Patchy rain possible | 13° /12° | 0.8 mm | 4 | |
| 26 Sept. | Light rain shower | 14° /11° | 15.7 mm | 4 | |
| 27 Sept. | Light rain shower | 14° /11° | 9.5 mm | 4 | |
| 28 Sept. | Light rain shower | 14° /11° | 3.8 mm | 4 | |
| 29 Sept. | Patchy rain possible | 14° /11° | 2.1 mm | 4 | |
| 30 Sept. | Light rain shower | 14° /11° | 10 mm | 4 | |
| Next | |||||
Guide for Isle of Man in September
In September, the Isle of Man experiences a transition from late summer to early autumn, bringing about noticeable changes in the weather. At the beginning of the month, the Isle of Man typically enjoys mild and pleasant conditions with average temperatures around 15°.
The days are still relatively long, providing ample opportunities for outdoor activities and exploration of the island's natural beauty. However, occasional rainfall can be expected, so it's advisable for visitors to pack some waterproof clothing.
As the month progresses towards the end of September, the Isle of Man sees a gradual decrease in temperatures, with average highs around 13° and cooler evenings. The likelihood of rainfall also increases, contributing to the island's lush green landscapes.
Visitors can still enjoy outdoor pursuits, but may need to dress in layers to accommodate the changing weather conditions.
Overall, September on the Isle of Man offers a mix of late summer warmth and early autumnal hints, making it an ideal time to experience the island's charm before the arrival of the cooler months.
Isle of Man in September - FAQ
What to pack to Isle of Man in September?
As you prepare for your trip to Isle of Man in September, 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 Isle of Man, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Isle of Man
Quick links
Where is Isle of Man?Get accurate weather forecasts for Isle of Man, located at latitude 54.15 and longitude -4.483. Stay updated with localized weather information tailored for Isle of Man.