Weather in Harwell, TN
Harwell, Friday, 9 October, 18:06
Overcast. Feels like 79°. High 81°, low 58°.
Monthly outlook for Harwell, TN: average high 74.8°, average low 52.2°. That is 2.3° above the climate normal for October. Precipitation is expected on 2 days (about 2.5 inches), against a normal of 4 days and 1.7 inches. The warmest day looks like 15 October (87.4°), the coolest 18 October (37.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 October – 18 October | 76.8° | 71.8° | +2.8° |
| 19 October – 28 October | 71.5° | 67.8° | +2° |
| 29 October – 7 November | at normal | 64.5° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Minor Hill (10 mi).
2.43
Harwell, Saturday, 10 October
Heavy rain. High 69°, low 51°.
0.06Harwell, Sunday, 11 October
Light rain. High 77°, low 50°.
0
Harwell, Monday, 12 October
Mostly clear. High 85°, low 63°.
0
Harwell, Tuesday, 13 October
Clear. High 83°, low 63°.
0.04Harwell, Wednesday, 14 October
Light rain. High 85°, low 67°.
0Harwell, Thursday, 15 October
Light rain. High 87°, low 70°.
0Harwell, Friday, 16 October
Clear. High 83°, low 59°.
0
Harwell, Saturday, 17 October
Partly cloudy. High 59°, low 45°.
0Harwell, Sunday, 18 October
Clear. High 59°, low 37°.
0Harwell, Monday, 19 October
Partly cloudy. High 66°, low 39°.
0Harwell, Tuesday, 20 October
Partly cloudy. High 68°, low 43°.
0Harwell, Wednesday, 21 October
Clear. High 71°, low 45°.
0Harwell, Thursday, 22 October
Clear. High 73°, low 47°.
0Harwell, Friday, 23 October
Clear. High 75°, low 48°.
0Harwell, Saturday, 24 October
Clear. High 75°, low 51°.
0.2Harwell, Sunday, 25 October
Climate normal for this date — 60-year average.
0.18Harwell, Monday, 26 October
Climate normal for this date — 60-year average.
0.14Harwell, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.17Harwell, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.1Harwell, Thursday, 29 October
Climate normal for this date — 60-year average.
0.1Harwell, Friday, 30 October
Climate normal for this date — 60-year average.
0.13Harwell, Saturday, 31 October
Climate normal for this date — 60-year average.
0.18Harwell, Sunday, 1 November
Climate normal for this date — 60-year average.
0.1Harwell, Monday, 2 November
Climate normal for this date — 60-year average.
0.1Harwell, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.09Harwell, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.16Harwell, Thursday, 5 November
Climate normal for this date — 60-year average.
0.11
Harwell, Friday, 6 November
Climate normal for this date — 60-year average.
0.17Harwell, Saturday, 7 November
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Harwell, TN are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Harwell, TN since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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