Funding round
Tomorrow.io Series F
Tomorrow.io, which works in weather intelligence platform solutions in Boston, raised $35M in a Series F round announced on 18 May 2026. 4 firms took part, 2 of them already investors. It is Tomorrow.io's sixth venture round on record; the one before was a Growth in Feb 2026.
$35M
Amount raised
Not disclosed
Post-money valuation
4
Investors
no lead named
Valuation
What this round says about the price
Tomorrow.io did not disclose a valuation in this round; its last disclosed one was $1.00B at the Growth (Feb 2026). It came 3 months after Tomorrow.io's Growth. It is 8.1% of the $434M Tomorrow.io has raised in the venture rounds on record. No later venture round is on record for Tomorrow.io.
Tomorrow.io's funding rounds
Tomorrow.io has 6 venture rounds on record. This one is highlighted.
- Series A 27 Nov 2017, led by Canaan $15M
- Series B 4 Oct 2018, led by Clearvision Ventures $45M
- Series D 30 Mar 2021, led by Stonecourt Capital $77M
- Series E 14 Jun 2023, led by Activate Capital $87M
- Growth 3 Feb 2026, led by Stonecourt Capital and HarbourVest $175M$1.00B post-money
- Series F this round 18 May 2026 $35M
Investors
Who put money in
4 firms took part; no lead investor was named.
Investors
- backs 75 venture-backed companies existing investor
- Harel Insurance existing investor
- backs 2 venture-backed companies new investor
- HarbourVest backs 37 venture-backed companies new investor
Comparable rounds
How it compares
16 Series F rounds in Tech Companies within a year either side disclosed an amount; the median was $248M, and this round was 14% of the median. The closest in time, other companies' Series F rounds in Tech Companies:
| Company | Announced | Amount | Post-money | Led by |
|---|---|---|---|---|
| Supabase Tech Companies | 4 Jun 2026 | $500M | $10.50B | GIC |
| SambaNova Tech Companies | 8 Jul 2026 | $1.00B | $11.00B | General Atlantic |
| ThreatLocker Tech Companies | 29 Jul 2026 | $190M | $1.60B | Elephant |
| Cyera Tech Companies | 8 Jan 2026 | $400M | $9.00B | Blackstone |
| Island Tech Companies | 24 Sep 2026 | $400M | $6.40B | Evolution Equity Partners |
| Claroty Tech Companies | 22 Jan 2026 | $150M | $3.00B | Golub Growth |
| Perplexity Tech Companies | 1 Dec 2025 | $500M | $20.00B | not named |
| Tech Companies | 13 Oct 2026 | $180M | not disclosed | L Catterton and Partners Group |
Sources
Where this comes from
Reported by 4 sources.
Questions
Frequently asked
How much did Tomorrow.io raise in its Series F round?
Tomorrow.io raised $35M in its Series F round, announced in May 2026.
Which investors took part in Tomorrow.io's Series F round?
Pitango, Harel Insurance, Stonecourt Capital and HarbourVest.
What was Tomorrow.io's valuation at the Series F round?
It was not disclosed; its last disclosed one was $1.00B at the Growth (Feb 2026).
How does it compare with other Series F rounds in Tech Companies?
16 Series F rounds in Tech Companies within a year either side disclosed an amount; the median was $248M, and this round was 14% of the median.