"in certain weather" is correct in written English.
It can be used to refer to a particular type of weather (e.g. "You're more likely to get a cold in certain weather"), or to an unpredictable weather situation (e.g. "Fishing can be difficult in certain weather").
Our research shows that in certain weather conditions there could be numerous bird casualties.
"They literally seed the ground, then migrate back up again in certain weather conditions".
This fallout can be so intense in certain weather patterns such as the El Niño condition that benthic animals on soft bottoms are smothered and die.
But it is considered a real possibility in certain weather conditions, as levels in the capital of several pollutants are so high that they are in breach of EU limits, putting the UK at risk of a £300m fine.
It also follows a series of differing recommendations by Airbus over the past two years on the use of airspeed sensors made by Thales in certain weather conditions and at high altitude.
London air pollution is some of the worst in Europe, but athletes are expected to suffer most in certain weather conditions brought on by a spell of hot weather when pollutants, including nitrogen dioxide, react in sunlight to form a low-level ozone smog which can get trapped for several days.
Increase fluid intake only in certain conditions, like warm weather or exercising Sweating may cause fluid loss and thereby you become easily dehydrated, which is not the goal.
Take into account what sort of weather you are playing in, some brands of paint do better in certain conditions than others.
Experts say that the risk for the Games is that in certain summer weather conditions – in particular, a "temperature inversion" in which on still, hazy days, a layer of warm air traps pollutants close to the ground – the pollution levels could go so high as to affect athletes' health and performance.
This can be seen as an intermediate outcome in the hypothesised chain of events between certain weather conditions and changes in robbery levels.
Furthermore, Böcker et al. (2013) argue that climatological differences might become culturally embedded so that they affect attitudes to certain weather – temperature in particular.
