Derry Hallowe'en hour-by-hour weather forecast for Thursday night

Tens of thousands are expecting to descend upon Derry on Thursday for what is sure to be a spooktacular celebration of all things Hallowe'en.

Here's an hour-by-hour look at how the weather is shaping up for the Hallowe'en street parade and fireworks finale.

You might want to take an umbrella with you.

You might want to take an umbrella with you.

Thursday October 31, 2019

5:00pm - Overcast - 10 per cent chance of rain - 9°C.

6:00pm - Overcast - 10 per cent chance of rain - 9°C.

7:00pm - Cloudy - 10 per cent chance of rain - 9°C.

8:00pm - Light Rain - 40 per cent chance of rain - 10°C.

9:00pm - Heavy Rain - 80 per cent chance of rain - 10°C.

10:00pm - Light Rain - 60 per cent chance of rain - 10°C.

11:00pm - Heavy Rain - 90 per cent chance of rain - 10°C.

12:00am - Heavy Rain - 90 per cent chance of rain - 10°C.

Friday November 1, 2019

1:00am Heavy Rain - 90 per cent chance of rain - 10°C.

2:00am Heavy Rain - 90 per cent chance of rain - 10°C.

3:00am Heavy Rain - 90 per cent chance of rain - 10°C.

4:00am Heavy Rain - 90 per cent chance of rain - 10°C.

5:00am Heavy Rain - 90 per cent chance of rain - 10°C.

6:00am Heavy Rain - 90 per cent chance of rain - 10°C.