With the new Canadian drone regulations that come into effect June 1 2019 are some changes to the weather and environmental factors around when and where you can operate a drone/uav/rpas.
Gone are the minimum ceiling and visibility restrictions of the prior regulations. Now the main factor is being able to keep the aircraft within line of sight.
Minimum Weather Conditions
901.34 No pilot shall operate a remotely piloted aircraft system unless the weather conditions at the time of flight permit
(a) the operation to be conducted in accordance with the manufacturer’s instructions; and
(b) the pilot of the system and any visual observer to conduct the entire flight within visual line-of-sight.
The biggest item in the above that may catch some out is “in accordance with the manufacturer’s instructions” which implies within the specified operating limits such as temperature and wind speed.
On a DJI Phantom 4 Pro for example it has an Operating Temperature Range 32° to 104°F (0° to 40°C), which could restrict use during much of the year in Canada.
In addition as before, care must be taken around potential icing conditions as well:
901.35 (1) No pilot shall operate a remotely piloted aircraft system when icing conditions are observed, are reported to exist or are likely to be encountered along the route of flight unless the aircraft is equipped with de-icing or anti-icing equipment and equipment designed to detect icing.
(2) No pilot shall operate a remotely piloted aircraft system with frost, ice or snow adhering to any part of the remotely piloted aircraft.
As before you must keep clear of clouds as a general safety condition:
602.45 No person shall fly a kite or launch a model rocket or a rocket of a type used in a fireworks display into cloud or in a manner that is or is likely to be hazardous to aviation safety.
One big allowance now for many recreational users that had been limited to SFOC holders before is the ability to fly at night:
Night Flight Requirements
901.39 (1) No pilot shall operate a remotely piloted aircraft system during the night unless the remotely piloted aircraft is equipped with position lights sufficient to allow the aircraft to be visible to the pilot and any visual observer, whether with or without night-vision goggles, and those lights are turned on.
(2) No pilot shall operate a remotely piloted aircraft system using night-vision goggles unless the goggles are capable of, or the person has another means of, detecting all light within the visual spectrum.