Nowmal › Tennessee › Hartsville/Trousdale County
Hartsville/Trousdale County, Tennessee
The week’s forecast, measured against two yardsticks: the “normal” your weather app still uses — a 1991–2020 average centered on 2005 — and the climate-adjusted normal, which here runs +0.3°F warmer. Same NOAA data. No pretending.
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Month by month
1991 called. It wants its climate baseline back.
| Month | Normal high | Adjusted high | Normal low | Adjusted low | Gap (high) |
|---|---|---|---|---|---|
| January | 47.3° | 47.5° | 28.2° | 28.7° | +0.2° |
| February | 51.9° | 53.4° | 31.5° | 33.3° | +1.4° |
| March | 60.8° | 61.9° | 38.0° | 39.1° | +1.1° |
| April | 71.0° | 71.2° | 45.7° | 45.8° | +0.3° |
| May | 78.8° | 78.5° | 55.3° | 56.2° | +-0.3° |
| June | 86.0° | 85.8° | 63.4° | 64.1° | +-0.2° |
| July | 89.2° | 88.8° | 67.6° | 68.8° | +-0.4° |
| August | 88.6° | 88.3° | 65.9° | 66.5° | +-0.3° |
| September | 83.0° | 82.5° | 58.8° | 59.2° | +-0.5° |
| October | 72.3° | 72.2° | 47.0° | 47.9° | +-0.1° |
| November | 60.3° | 61.2° | 36.8° | 37.7° | +0.9° |
| December | 50.5° | 52.0° | 31.3° | 32.9° | +1.4° |
The “normal” temperature in every weather app is a 30-year average (1991–2020) — a number centered on mid-2005, two decades out of date in a warming climate. The Climate-Adjusted Normal takes NOAA’s official normal and advances it to the present using this county’s own measured warming trend.
It isn’t a forecast — it’s a more honest yardstick for what “normal” means now. Read why Nowmal exists →
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About this data
The forecast is the National Weather Service’s, for Hartsville/Trousdale County itself. Normals and the warming trend are computed at county level (Trousdale County) from NOAA’s homogenized climate record, because climate trends vary smoothly — nearby towns warm at statistically indistinguishable rates. Method details on the methodology page.
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