US: FAA D-ATIS (atis.info) · Canada & others: ATIS collected from aircraft ACARS requests (atis.guru) — always check the issue time.
24-hour clock, midnight rollover handled. Zone example: SFO → DEN is +1, DEN → SFO is −1.
°F = °C × 9/5 + 32 · type in either box and the other updates.
ATIS wind and runway are both magnetic. A runway number is taken as ×10° (enter the exact heading to be more precise).