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Sky replacement and weather effect prompts

A grey sky can flatten a good photo. These prompts swap it for a sunset or a stormy sky, add stars or northern lights at night, or change the weather with rain, snow, morning fog, sun rays or a rainbow. Others change the season, from green to autumn colours or spring blossom, and turn day into night or night into day.

The prompts ask the AI to match the light on buildings, water and people to the new sky, so the edit looks real. Pick a sky that fits the direction of the shadows already in your photo.

15 prompts · Works in Gemini and ChatGPT · Updated

Before and after example: Replace a dull sky with a sunset
AI-generated example: before on the left, after on the right. Made with the prompt on this page.

Replace a dull sky with a sunset

Replace the sky in this photo with a [SKY, e.g. warm sunset with soft clouds]. Keep everything else in the photo unchanged.

Match the light and colour on the buildings, ground and people to the new sky, add matching reflections in glass or water, and blend the horizon so the edit looks natural. No halos.
Customise in the builder Copy & open Gemini ↗

Full prompt page: fill-in boxes, tips and the common fix →

How to use it

Three steps, about a minute

  1. 1

    Pick a photo with a clear horizon line. Trees and buildings against the sky are fine.

  2. 2

    Upload it to Gemini or ChatGPT, paste the prompt and describe the sky or weather you want.

  3. 3

    Check the edges along rooftops and trees, and that reflections in water or glass match.

Make it yours

  • Match the time: a sunset sky suits a photo taken in the late afternoon; a midday photo suits blue sky with clouds.
  • Weather: "light drizzle with wet reflections" is more believable than "heavy storm".
  • Night: for stars, ask to "darken the foreground naturally" so it does not look like day.
  • Honesty: label travel photos as edited if you changed the sky or weather.

If it goes wrong

Halo around buildings or trees
Reply "blend the horizon with no halos; keep fine branches".
People look lit wrongly
Ask to "match the colour and direction of light on the people to the new sky".
Reflections do not match
Add "update reflections in water and glass to the new sky".
Too dramatic
Ask for "a softer, more natural version".

14 more prompts in this collection

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Guides

Guides that use these prompts

All guides →
28 September 2026Autumn aesthetic AI photo prompts: golden leaves, cosy knits and warm light
FAQ

Questions, answered

How do I replace the sky in a photo with AI?

Upload the photo to Gemini or ChatGPT and paste the sky replacement prompt with the sky you want. It asks for matching light and reflections so the scene fits the new sky.

Can I add northern lights to my photo?

Yes, as an artistic edit. If you share it, say it is edited, especially if you tag a real place where people might expect to see the lights.

Why does the new sky look fake?

Usually the light does not match. Choose a sky with the sun on the same side as your shadows, and ask the AI to "match the light on the buildings and ground".