@johnefrancis@cosocial.ca
My chimney-mounted weather station has been >34.5 since 1:20PM, while the Ottawa airport has been about 0.5-1.0 degrees cooler. On very still, sunny, and hot days, it can read a bit high, but there is a good breeze today.
The difference is probably because the airport station is standard sited in the middle of >1000 sq ft. of grass, at a height of 1.25-2m, while mine is about 8ft above a roof.
Or microclimate factors. The other personal stations around Barrhaven are all reading 35-38.