When to go · Belfast
Belfast in September
Great month. Inside Belfast's best window: May–Sep.
Key facts
- Verdict
- Great
- Temperature
- 17°C (63°F)63°F (17°C) / 10°C (49°F)49°F (10°C)
- average high / low
- Rain days
- 16
- Crowds
- Medium
- United Kingdom overall
- Prices
- Medium
- United Kingdom overall
Verdict
Inside Belfast's best window: May–Sep.
Is another month better than September?
No other month rates higher than September for Belfast in this guide.
Weather in September
- BelfastHighs around 17.3 °C (63 °F), lows around 9.6 °C (49 °F), rain on about 16 daysHighs around 63 °F (17.3 °C), lows around 49 °F (9.6 °C), rain on about 16 days
Crowds and prices
- Crowds · United Kingdom overall
- Medium
- Prices · United Kingdom overall
- Medium
United Kingdom overall: Schools back, weather often settled; the best month for walking and the Highlands.
Compare two months
Weather, crowds and prices for any two months in Belfast, side by side.
Verdict
Sep: Great
May: Great
Daytime high
Sep: 17.3 °C (63 °F)63 °F (17.3 °C)
May: 15.7 °C (60 °F)60 °F (15.7 °C)
Night low
Sep: 9.6 °C (49 °F)49 °F (9.6 °C)
May: 7 °C (45 °F)45 °F (7 °C)
Rain days
Sep: 16
May: 15 (better)
Crowds
Sep: Medium
May: Medium
Prices
Sep: Medium
May: Medium
Festivals listed
Sep: 0
May: 0
September: Inside Belfast's best window: May–Sep.
May: Inside Belfast's best window: May–Sep.
Belfast: figures are long-term averages from this guide, not a forecast.
What to pack
- A warm layer for the evenings
- A rain jacket or umbrella and shoes that dry fast