đ¤ď¸ September 2025 â From late summer warmth to autumn cold in Tielt
Welcome to the monthly overview of MeteoTielt - Weather Station Tielt.Â
September brought a transition in Tielt from summer warmth to distinctly autumnal weather. The month began mild and sunny with a few notably warm days, but ended cool, dry, and with decreasing solar strength.
đĄď¸ Temperature
The month started with pleasant temperatures, and on 7 September the highest value of the month was reached at 31.7°C, a final remnant of summer.
From mid-September, the maxima steadily dropped towards 15 to 20°C, with cool nights in the last week (lows down to7°C).
The average maximum temperature was around 21°C, slightly above the long-term average for September.
đ§ď¸ Precipitation
September experienced a wet first half with regular showers between 3 and 15 September. On3 Septemberthe most precipitation fell, with 17 mm.
After that, a notablydry second halfof the month followed: from 16 to 30 September barely any rain fell.
The monthly totals amount to about 59 mm, which is just below the normal monthly average.
đ¨ Wind
The wind played a role especially in the first half, with stormy gusts of up to 54.7 km/h on 3 September and again 50 km/h on 15 September.
The second half of the month was much calmer, with predominantly weak to moderate westerly winds.
âď¸ Solar radiation
The graphs show predominantly high solar radiation in the first half of the month, with peaks above 900â1000 W/m² around 12 September.
From the third week onwards, the solar power decreased, which is typical for the season, but there were still several clear days with sufficient radiation.
đ¤ď¸ UV index
The UV index followed the same pattern: at the beginning of the month, values between 4 and 5 were measured, but from 20 September this dropped to 2 to 3, indicating mild late summer sun.
The highest UV value (5) was recorded on 2 September.
đŤď¸ Air quality
The air quality was generally good to moderate in September.
In the first weeks, the values remained low, but from 19 September there was a clear deterioration, with several days of poor air quality. Late September â possibly due to a combination of stable weather and air pollution or smoke influences.
The peak value was reached around 27â28 September.
đ Conclusion
September 2025 in Tielt was a calm transitional month with a final summer highlight at the beginning of September, followed by a dry and cooler second half.
The sun was regularly visible, the UV index gradually faded, and the air quality only experienced some poorer moments towards the end.
A typical late summer month then, with plenty of variation but without extreme outliers.
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