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As of 17:34 CDT

Weather in Harwell, TN

80°Current weather

Harwell, Saturday, 8 August, 17:34

Overcast. Feels like 80°. High 89°, low 71°.

Pressure30.06 inHg
Wind5.1 mph W
Humidity88%
Visibility6.2 mi
Dew point76°
Sun, 0990° / 74°0.83Heavy rain
90 °Heavy rain

Harwell, Sunday, 9 August

Heavy rain. High 90°, low 74°.

Pressure30.09 inHg
Wind4.9 mph SW
Humidity63%
Visibility6.2 mi
Dew point72°
Mon, 1090° / 73°0.18Rain
90 °Rain

Harwell, Monday, 10 August

Rain. High 90°, low 73°.

Pressure30.12 inHg
Wind6.4 mph SW
Humidity63%
Visibility6.2 mi
Dew point73°
Tue, 1191° / 71°0.36Rain
91 °Rain

Harwell, Tuesday, 11 August

Rain. High 91°, low 71°.

Pressure30.06 inHg
Wind9.8 mph SW
Humidity73%
Visibility6.2 mi
Dew point75°
Wed, 1292° / 72°0.23Rain
92 °Rain

Harwell, Wednesday, 12 August

Rain. High 92°, low 72°.

Pressure29.97 inHg
Wind12.3 mph W
Humidity59%
Visibility6.2 mi
Dew point73°
Thu, 1390° / 71°2.31Heavy rain
90 °Heavy rain

Harwell, Thursday, 13 August

Heavy rain. High 90°, low 71°.

Pressure29.94 inHg
Wind9.5 mph SW
Humidity75%
Visibility—
Dew point73°
Fri, 1475° / 70°1.55Heavy rain
75 °Heavy rain

Harwell, Friday, 14 August

Heavy rain. High 75°, low 70°.

Pressure30.06 inHg
Wind6.8 mph N
Humidity99%
Visibility—
Dew point72°
Sat, 1581° / 65°0Overcast
81 °Overcast

Harwell, Saturday, 15 August

Overcast. High 81°, low 65°.

Pressure30.21 inHg
Wind7 mph NE
Humidity61%
Visibility—
Dew point63°
Sun, 1684° / 63°0Overcast
84 °Overcast

Harwell, Sunday, 16 August

Overcast. High 84°, low 63°.

Pressure30.21 inHg
Wind5.5 mph NE
Humidity54%
Visibility—
Dew point63°
Mon, 1779° / 69°0.14Light rain
79 °Light rain

Harwell, Monday, 17 August

Light rain. High 79°, low 69°.

Pressure30.15 inHg
Wind5.7 mph S
Humidity77%
Visibility—
Dew point70°
Tue, 1888° / 72°0.19Rain
88 °Rain

Harwell, Tuesday, 18 August

Rain. High 88°, low 72°.

Pressure29.97 inHg
Wind11.9 mph SW
Humidity65%
Visibility—
Dew point73°
Wed, 1988° / 74°0.09Light rain
88 °Light rain

Harwell, Wednesday, 19 August

Light rain. High 88°, low 74°.

Pressure29.97 inHg
Wind7.7 mph W
Humidity71%
Visibility—
Dew point73°
Thu, 2090° / 74°0.23Light rain
90 °Light rain

Harwell, Thursday, 20 August

Light rain. High 90°, low 74°.

Pressure29.94 inHg
Wind9.6 mph W
Humidity69%
Visibility—
Dew point73°
Fri, 2184° / 73°0.54Rain
84 °Rain

Harwell, Friday, 21 August

Rain. High 84°, low 73°.

Pressure29.94 inHg
Wind9.1 mph SW
Humidity91%
Visibility—
Dew point75°
Sat, 2281° / 73°0.26Light rain
81 °Light rain

Harwell, Saturday, 22 August

Light rain. High 81°, low 73°.

Pressure29.94 inHg
Wind7.6 mph N
Humidity89%
Visibility—
Dew point73°
Sun, 2374° / 70°0.3Rain
74 °Rain

Harwell, Sunday, 23 August

Rain. High 74°, low 70°.

Pressure30.00 inHg
Wind8.9 mph NE
Humidity91%
Visibility—
Dew point69°

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.