I don't have sufficient tournament data for "UW Tempo" in Standard to provide matchup analysis. Looking at the recent meta report (last 60 days), the format doesn't show a UW Tempo archetype in the database. There is an "Azorius Midrange" deck with 66 entries (1.02% presence) and "Azorius Control" with 96 entries (1.47% presence), but neither appears to be positioned as a tempo deck.
The decks you mentioned are well-represented: Dimir Midrange (8.75% presence, 49.08% winrate), Landfall (7.52% presence, 54.76% winrate), and Izzet Lessons (14.04% presence, 51.68% winrate) are all top performers. However, I cannot find "Izzet Spellementals" in the data either - the closest match would be Izzet Midrange (3.75% presence) or Izzet Portal (1.68% presence).
If UW Tempo is a newer or less common build, it may not have enough tournament results recorded yet. If you can clarify which specific Azorius archetype you're referring to (or share a decklist), I can provide more targeted matchup data.
Sources: Data from 266 Standard tournaments between December 2025 and February 2026, covering the current competitive landscape.