December 8 in Louisville
Weather forecasts run out after about two weeks. For any date further out than that, the honest answer isn't a single number — it's the range Louisville actually delivers on this date, and how often.
On December 8, Louisville, KY typically reaches 48°F, but has run anywhere from 34°F to 63°F in eight years out of ten. About 64% of December 8s see no measurable precipitation.
The odds on December 8
Odds computed from the last 30 years (1996–2025).
Where this comes from: 826 daily observations from LOUISVILLE INTL AP, covering 1970–2025. We pool every day within 7 days of December 8 — a single calendar date has only about 55 readings, far too few to place a 10th percentile you'd want to trust.
Why it's not a plain average: A climatology computed straight across 1970–2025 describes the middle of that period, not today, so as a statement about the present it runs cold. We fit a trend on year and shift each observation to 2025 before taking the range. The probabilities use the last 30 years instead — shifting a temperature along a trend is well defined, shifting “did it rain” is not.
What this is not: Not a forecast. It is what Louisville, KY has actually done on this date, which is the only defensible answer once you're past the two-week horizon where real forecasts stop. Data: NOAA NCEI GHCN-Daily.