BelgiumAverage weather for Spa in September
It's cool to moderate in September in Spa with an average temperature of 18°C. Temperatures this month range from a low of 15°C to a high of 21°C. At night, you can expect temperatures between 8°C and 12°C.
Start of September
The month of September starts in Spa with mild temps, averaging around 20°C during the day and nights around 12°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid September
By mid-September, daytime temps stay steady at around 20°C, with nights around 11°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in Spa is around 17°C, while nighttime temps are about 9°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
In September, there is an average of 82 mm of precipitation, spread over 11 days. The wind speed is around 3 Bft, mostly coming from the South.
Spa in September |
New York | ||
|---|---|---|---|
 Average temperature |
18°C | 27°C | |
 Max. temperature |
21°C | 31°C | |
| Min. temperature |
15°C | -5°C | |
 Total precipitation |
82 mm | 57 mm | |
| Rainy days |
11 days | 9 days | |
August
UV index
The UV index is a maximum of 5 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is September a good time to visit Spa?
Looking for great weather? September is a good time to be in Spa. The temperatures are nice, and there’s not too much rain.
Temperature records
With 32°C in 2020, Spa reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 7°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of 0°C to a highest value of 19°C.
Check out the climate of Spa for all months and discover the best travel time
Curious about the weather in other parts of Belgium? Check out the climate and weather for spots like Ardennes, Bruges, Antwerp, or explore other destinations in Belgium.
Daily Temperature in September in Spa
This chart shows the average daily high and low temperatures in September for Spa, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Spa
The chart below shows the average daily precipitation in September for Spa, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 11 days of precipitation in Spa.
Daily UV index in September in Spa
This chart shows the average daily UV index in September in Spa, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Spa over the years
This chart shows the average temperature in September in Spa, measured in degrees Celsius, over the past few years.
Total precipitation in September in Spa over the years
This chart shows the average precipitation in September in Spa, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Spa
Click on any day in September to get detailed info about the usual weather on that day in Spa. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Spa
Have you been to Spa in September?
Share your weather experience in September in Spa.
Average weather in Spa by month
Click on a month below to see detailed weather info for Spa. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
