As of 16:19 EDT

Weather in Erwin, TN

81°

Erwin, Saturday, 8 August, 16:19

Light rain. Feels like 85°. High 81°, low 66°.

Pressure30.12 inHg

Wind4 mph W

Humidity80%

Visibility6.2 mi

Dew point73°

See detailed hourly forecast

Monthly outlook for Erwin, TN: average high 81°, average low 64.8°. That is 0.3° below the climate normal for August. Precipitation is expected on 13 days (about 3.2 inches), against a normal of 7 days and 1.7 inches. The warmest day looks like 20 August (87.1°), the coolest 15 August (56°).

81°/64.8°

Average high / low

−0.3°

Below normal

13 / 7

Wet days / normal

3.2 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	81.2°	81.5°	-0.2°
18 August – 27 August	80.6°	81.5°	-0.5°
28 August – 6 September	at normal	80.3°	—

August records over 66 years

96.6°16 August 2007All-time high

46.9°29 August 1986All-time low

Climate normals and records are computed from the nearest reference point — Johnson City (14 mi).

Sun, 0982° / 67°

0.3

82 °

Erwin, Sunday, 9 August

Rain. High 82°, low 67°.

Pressure30.12 inHg

Wind3.5 mph NW

Humidity57%

Visibility6.2 mi

Dew point65°

Mon, 1085° / 67°

0.04

85 °

Erwin, Monday, 10 August

Light rain. High 85°, low 67°.

Pressure30.15 inHg

Wind5.1 mph W

Humidity59%

Visibility6.2 mi

Dew point66°

Tue, 1184° / 67°

0.33

84 °

Erwin, Tuesday, 11 August

Rain. High 84°, low 67°.

Pressure30.09 inHg

Wind5.3 mph W

Humidity57%

Visibility6.2 mi

Dew point67°

Wed, 1284° / 67°

0.2

84 °

Erwin, Wednesday, 12 August

Rain. High 84°, low 67°.

Pressure29.97 inHg

Wind10.3 mph W

Humidity68%

Visibility6.2 mi

Dew point67°

Thu, 1384° / 66°

0.18

84 °

Erwin, Thursday, 13 August

Rain. High 84°, low 66°.

Pressure29.94 inHg

Wind10.3 mph W

Humidity55%

Visibility—

Dew point64°

Fri, 1470° / 61°

0.43

70 °

Erwin, Friday, 14 August

Rain. High 70°, low 61°.

Pressure30.03 inHg

Wind6.9 mph W

Humidity98%

Visibility—

Dew point68°

Sat, 1577° / 56°

77 °

Erwin, Saturday, 15 August

Clear. High 77°, low 56°.

Pressure30.21 inHg

Wind6.2 mph N

Humidity41%

Visibility—

Dew point49°

Sun, 1681° / 58°

0.02

81 °

Erwin, Sunday, 16 August

Light rain. High 81°, low 58°.

Pressure30.24 inHg

Wind6.4 mph NW

Humidity49%

Visibility—

Dew point58°

Mon, 1784° / 61°

0.08

84 °

Erwin, Monday, 17 August

Light rain. High 84°, low 61°.

Pressure30.15 inHg

Wind7.4 mph W

Humidity45%

Visibility—

Dew point58°

Tue, 1878° / 65°

0.46

78 °

Erwin, Tuesday, 18 August

Rain. High 78°, low 65°.

Pressure30.03 inHg

Wind5.4 mph W

Humidity84%

Visibility—

Dew point69°

Wed, 1985° / 70°

0.11

85 °

Erwin, Wednesday, 19 August

Light rain. High 85°, low 70°.

Pressure29.94 inHg

Wind7.1 mph N

Humidity56%

Visibility—

Dew point64°

Thu, 2087° / 67°

0.18

87 °

Erwin, Thursday, 20 August

Rain. High 87°, low 67°.

Pressure29.94 inHg

Wind7.7 mph W

Humidity45%

Visibility—

Dew point61°

Fri, 2179° / 68°

0.21

79 °

Erwin, Friday, 21 August

Light rain. High 79°, low 68°.

Pressure29.91 inHg

Wind7 mph W

Humidity66%

Visibility—

Dew point66°

Sat, 2276° / 67°

0.29

76 °

Erwin, Saturday, 22 August

Light rain. High 76°, low 67°.

Pressure29.88 inHg

Wind4.4 mph W

Humidity87%

Visibility—

Dew point71°

Sun, 2378° / 64°

0.05

78 °

Erwin, Sunday, 23 August

Light rain. High 78°, low 64°.

Pressure30.00 inHg

Wind7.2 mph N

Humidity57%

Visibility—

Dew point60°

From day 17 onward the outlook is built from 60-year climate statistics

Mon, 2481° / 63°

0.1

81 °

Erwin, Monday, 24 August

Climate normal for this date — 60-year average.

Average high81°

Average low63°

Average precipitation0.1 in

Chance of precipitation35%

Record high93° (2007)

Record low54° (1997)

Tue, 2582° / 64°

0.07

82 °

Erwin, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high82°

Average low64°

Average precipitation0.07 in

Chance of precipitation25%

Record high93° (2023)

Record low56° (2013)

Wed, 2682° / 63°

0.07

82 °

Erwin, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high82°

Average low63°

Average precipitation0.07 in

Chance of precipitation27%

Record high92° (2016)

Record low55° (2015)

Thu, 2782° / 64°

0.15

82 °

Erwin, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high82°

Average low64°

Average precipitation0.15 in

Chance of precipitation38%

Record high91° (2016)

Record low53° (1968)

Fri, 2882° / 64°

0.08

82 °

Erwin, Friday, 28 August

Climate normal for this date — 60-year average.

Average high82°

Average low64°

Average precipitation0.08 in

Chance of precipitation32%

Record high91° (2021)

Record low52° (1968)

Sat, 2982° / 63°

0.06

82 °

Erwin, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high82°

Average low63°

Average precipitation0.06 in

Chance of precipitation28%

Record high92° (2024)

Record low47° (1986)

Sun, 3082° / 63°

0.06

82 °

Erwin, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high82°

Average low63°

Average precipitation0.06 in

Chance of precipitation38%

Record high94° (2024)

Record low49° (1986)

Mon, 3181° / 64°

0.1

81 °

Erwin, Monday, 31 August

Climate normal for this date — 60-year average.

Average high81°

Average low64°

Average precipitation0.1 in

Chance of precipitation43%

Record high90° (2024)

Record low52° (1976)

Tue, 0180° / 63°

0.15

80 °

Erwin, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high80°

Average low63°

Average precipitation0.15 in

Chance of precipitation40%

Record high90° (1973)

Record low52° (1999)

Wed, 0280° / 63°

0.08

80 °

Erwin, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high80°

Average low63°

Average precipitation0.08 in

Chance of precipitation35%

Record high91° (2011)

Record low49° (1967)

Thu, 0380° / 62°

0.1

80 °

Erwin, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high80°

Average low62°

Average precipitation0.1 in

Chance of precipitation42%

Record high93° (2011)

Record low49° (1967)

Fri, 0479° / 62°

0.15

79 °

Erwin, Friday, 4 September

Climate normal for this date — 60-year average.

Average high79°

Average low62°

Average precipitation0.15 in

Chance of precipitation38%

Record high92° (2019)

Record low50° (1997)

Sat, 0579° / 62°

0.17

79 °

Erwin, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high79°

Average low62°

Average precipitation0.17 in

Chance of precipitation40%

Record high91° (1975)

Record low47° (1997)

Sun, 0679° / 62°

0.12

79 °

Erwin, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high79°

Average low62°

Average precipitation0.12 in

Chance of precipitation38%

Record high89° (2023)

Record low51° (1984)

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 Erwin, 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 Erwin, 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.