Climate impact on IFRS 15 might not be apparent at first, but changes in climate conditions could have implications for how entities recognize revenue under this standard.

Here are some potential impacts:

1. Change in Contract Terms: The increasing focus on environmental sustainability could lead to more contracts including environmental performance conditions. For instance, a contract for the sale of goods might include a clause requiring the goods to be produced using renewable energy. If the entity fails to meet this condition, it might not be able to recognize the full amount of the contract revenue under IFRS 15.
2. Delayed Revenue Recognition: Severe weather events or regulatory changes related to climate change could disrupt an entity's ability to fulfill its performance obligations, which might delay the recognition of revenue under IFRS 15.
3. Variable Consideration: If contracts include terms that link payment to environmental factors or performance, this could create "variable consideration" under IFRS 15. For instance, a contract might provide for a bonus payment if the entity reduces its carbon emissions below a certain threshold. The entity would need to estimate this variable consideration when recognizing revenue.
4. Impairment of Assets: Assets involved in the performance of a contract could be impaired due to climate-related events or changes in market conditions. This could affect the transaction price and hence the revenue recognized under the contract.
5. Changes in Customer Behaviour: Climate change can also drive changes in customer behaviour, which could in turn affect contract terms and the timing and amount of revenue recognition.
6. Contract Modifications: Changes in regulations or market conditions related to climate change could lead to more frequent contract modifications, which have specific accounting treatment under IFRS 15.
7. Long-term Contracts: For long-term contracts, climate change might impact the pattern of transfer of goods or services to the customer and hence the over time or point-in-time revenue recognition.

Remember that these are only potential impacts and the actual effect will depend on the specific circumstances of each entity.