UV trends
Summary
Today’s highest forecast UV in Australia is 9.5 (Very high) in Townsville.
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Charts
Brisbane: hour by hour
Brisbane, every recorded hour, last 14 days, up to now.
Brisbane: recorded daily max
Brisbane’s recorded max each day — the highest hour we recorded (no forecast).
Australia’s highest UV each day
Strongest recorded max in any of our 32 cities each day (today: so far).
Brisbane: daylight hours by level
Share of Brisbane’s daylight hours at each UV level. What do the levels mean? Low 0–2 · Moderate 3–5 · High 6–7 · Very high 8–10 · Extreme 11+. Sun protection is recommended from 3.
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Sunniest cities lately
Average recorded daily max, last 14 days.
How we calculate these numbers
- Average (mean) — add the values and divide by how many there are.
- Median — the middle value after sorting.
- Spread (σ) — population standard deviation:
√(Σ(x − mean)² / n). - Trend — straight-line fit of the daily peak against the day number; we only call it rising/falling above 0.3 UV per day.
- Daylight hours — hours where UV is above 0.5; level shares count only those hours.
History starts from the first backfill and grows every hour.