| Cover | Dec. 31, 2024 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 31, 2024 |
| Entity File Number | 001-42460 |
| Entity Registrant Name | Rain Enhancement Technologies Holdco, Inc. |
| Entity Central Index Key | 0002028293 |
| Entity Tax Identification Number | 99-3527155 |
| Entity Incorporation, State or Country Code | MA |
| Entity Address, Address Line One | 1659 Chinaberry Ct. |
| Entity Address, City or Town | Naples |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 34105 |
| City Area Code | 508 |
| Local Phone Number | 361-6699 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Common Class A [Member] | |
| Title of 12(b) Security | Class A common stock, par value $0.0001 per share |
| Trading Symbol | RAIN |
| Security Exchange Name | NASDAQ |
| Redeemable Warrants [Member] | |
| Title of 12(b) Security | Redeemable warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 |
| Trading Symbol | RAINW |
| Security Exchange Name | NASDAQ |
