There might be a few mosquitos and blackflies in Churchill during the summer.

Because of this I'd recommend that you bring with you a bug jacket. Otherwise, you should make sure to wear clothes that cover you up, and that you spray yourself with bug spray.

https://www.tripadvisor.co.uk/ShowTopic-g154952-i3710-k7589333-Bugs_in_July-Churchill_Manitoba.html 

I hope this helps!

Kind Regards,

Amy