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Each time it makes sense, no more, no less. You do not need to make recalls. Consider your character's POV. When does he think about the weather ? Closing the door of my house, I looked at the...
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/36899 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
**Each time it makes sense, no more, no less.** You do not need to make recalls. Consider your character's POV. When does he think about the weather ? > Closing the door of my house, I looked at the sky. It will not be long before it starts to snow again. or > Walking on the sidewalk, he was careful not to slip. or > He looked at the landscape, beautifully wrapped in a coat of snow. If weather is meaningful for your story, that should naturally show in concrete facts, not arbitrary reminders.