When to go · Spa
Spa in September
Great month. Inside Spa's best window: May–Sep (warm, events, open baths).
Key facts
- Verdict
- Great
- Temperature
- 19°C (66°F)66°F (19°C) / 11°C (52°F)52°F (11°C)
- average high / low
- Rain days
- 9
- Crowds
- Medium
- Belgium overall
- Prices
- Medium
- Belgium overall
Verdict
Inside Spa's best window: May–Sep (warm, events, open baths).
Is another month better than September?
No other month rates higher than September for Spa in this guide.
Weather in September
- SpaHighs around 19 °C (66 °F), lows around 11 °C (52 °F), rain on about 9 daysHighs around 66 °F (19 °C), lows around 52 °F (11 °C), rain on about 9 days
Crowds and prices
- Crowds · Belgium overall
- Medium
- Prices · Belgium overall
- Medium
Belgium overall: Mild, calmer; Heritage Days open private buildings in Brussels and Flanders.
Compare two months
Weather, crowds and prices for any two months in Spa, side by side.
Verdict
Sep: Great
May: Great
Daytime high
Sep: 19 °C (66 °F)66 °F (19 °C)
May: 17 °C (63 °F)63 °F (17 °C)
Night low
Sep: 11 °C (52 °F)52 °F (11 °C)
May: 8 °C (46 °F)46 °F (8 °C)
Rain days
Sep: 9
May: 8 (better)
Crowds
Sep: Medium
May: Medium
Prices
Sep: Medium
May: Medium
Festivals listed
Sep: 0
May: 0
September: Inside Spa's best window: May–Sep (warm, events, open baths).
May: Inside Spa's best window: May–Sep (warm, events, open baths).
Spa: figures are long-term averages from this guide, not a forecast.
What to pack
- A warm layer for the evenings