Observed 6:35 PM EDT at KMMI

Decatur, TN weather

Sunny and 68°20°, jacket by 9 PM.

Forecasts agree

Now 68°20°

Sunny

Wind: 3 mph5 km/h; From the north-northeast. Light through 7 AM
Dew point: 43°6°; Comfortable
UV tomorrow: 5Moderate; Moderate 11 AM–5 PM · peak 5
Air quality: 31Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.37 inHg1028 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

About the same as this time yesterday (68°20° then, 68°20° now)

Good hours for

Low 45°7° tomorrow at 7 AM
Above 60°16° tomorrow by noon
High 72°22° tomorrow at 4 PM
Drops 12°7° tomorrow night 6–9 PM (70°21° → 58°14°)
Below 60°16° tomorrow night after 8 PM

TonightDown to 46°8° by 4 AM · Clear
Tomorrow morningUp to 58°14° by 11 AM · Clear
Tomorrow afternoonUp to 72°22° by 4 PM · Clear
Tomorrow nightDown to 46°8° by 4 AM · Clear
Monday morningUp to 59°15° by 11 AM · Partly cloudy
Monday afternoonUp to 74°23° by 4 PM · Partly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 7p	Mostly clear	65°18° (likely 61°16° to 65°18°)	65°18°	0%	0 mph0 km/h, gusts 4 mph7 km/h	50%	10%	0
Sat 8p	Clear	61°16° (likely 57°14° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 4 mph7 km/h	58%	11%	0
Sat 9p	Mostly clear	55°13° (likely 54°12° to 58°14°)	55°13°	0%	0 mph0 km/h, gusts 4 mph7 km/h	72%	29%	0
Sat 10p	Clear	53°12° (likely 51°11° to 57°14°)	53°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	77%	4%	0
Sat 11p	Clear	51°11° (likely 49°9° to 55°13°)	51°11°	0%	0 mph0 km/h, gusts 3 mph5 km/h	83%	4%	0
Sun 12a	Clear	50°10° (likely 48°9° to 54°12°)	50°10°	0%	0 mph0 km/h, gusts 3 mph5 km/h	83%	0%	0
Sun 1a	Clear	49°9° (likely 46°8° to 53°12°)	49°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	86%	4%	0
Sun 2a	Clear	48°9° (likely 43°6° to 52°11°)	48°9°	0%	0 mph0 km/h, gusts 10 mph16 km/h	89%	12%	0
Sun 3a	Clear	47°8° (likely 43°6° to 52°11°)	47°8°	0%	0 mph0 km/h, gusts 8 mph12 km/h	89%	13%	0
Sun 4a	Clear	46°8° (likely 42°6° to 51°11°)	46°8°	0%	0 mph0 km/h, gusts 6 mph10 km/h	93%	15%	0
Sun 5a	Clear	46°8° (likely 42°6° to 49°9°)	46°8°	0%	0 mph0 km/h, gusts 5 mph8 km/h	89%	15%	0
Sun 6a	Clear	46°8° (likely 41°5° to 48°9°)	46°8°	0%	0 mph0 km/h, gusts 5 mph8 km/h	89%	13%	0
Sun 7a	Clear	45°7° (likely 41°5° to 48°9°)	45°7°	0%	0 mph0 km/h, gusts 4 mph6 km/h	89%	13%	0
Sun 8a	Sunny	45°7° (likely 41°5° to 48°9°)	45°7°	0%	0 mph0 km/h, gusts 3 mph5 km/h	93%	13%	0
Sun 9a	Sunny	47°8° (likely 44°7° to 51°11°)	47°8°	0%	0 mph0 km/h, gusts 2 mph4 km/h	89%	16%	0
Sun 10a	Sunny	52°11° (likely 51°11° to 56°13°)	52°11°	0%	0 mph0 km/h, gusts 3 mph5 km/h	83%	6%	1
Sun 11a	Sunny	58°14° (likely 58°14° to 61°16°)	58°14°	0%	0 mph0 km/h, gusts 6 mph9 km/h	72%	0%	3
Sun 12p	Sunny	63°17° (likely 62°17° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 4 mph7 km/h	60%	0%	4
Sun 1p	Sunny	67°19° (likely 65°18° to 67°19°)	67°19°	0%	0 mph0 km/h, gusts 6 mph9 km/h	52%	0%	5
Sun 2p	Sunny	70°21° (likely 68°20° to 70°21°)	70°21°	0%	0 mph0 km/h, gusts 8 mph13 km/h	46%	0%	5
Sun 3p	Sunny	71°22° (likely 69°21° to 71°22°)	71°22°	0%	5 mph8 km/h from NE, gusts 11 mph18 km/h	44%	0%	5
Sun 4p	Sunny	72°22° (likely 70°21° to 72°22°)	72°22°	0%	5 mph8 km/h from NE, gusts 11 mph18 km/h	41%	0%	4
Sun 5p	Sunny	71°22° (likely 69°21° to 71°22°)	71°22°	0%	5 mph8 km/h from NE, gusts 12 mph19 km/h	42%	0%	2
Sun 6p	Sunny	70°21° (likely 67°19° to 70°21°)	70°21°	0%	0 mph0 km/h, gusts 9 mph15 km/h	44%	1%	1
Sun 7p	Clear	65°18° (likely 60°16° to 65°18°)	65°18°	0%	0 mph0 km/h, gusts 5 mph9 km/h	52%	0%	0
Sun 8p	Clear	58°14° (likely 56°13° to 60°16°)	58°14°	0%	0 mph0 km/h, gusts 5 mph9 km/h	72%	2%	0
Sun 9p	Clear	55°13° (likely 54°12° to 58°14°)	55°13°	0%	0 mph0 km/h, gusts 5 mph9 km/h	77%	0%	0
Sun 10p	Clear	52°11° (likely 52°11° to 56°13°)	52°11°	0%	0 mph0 km/h, gusts 4 mph6 km/h	86%	30%	0
Sun 11p	Clear	51°11° (likely 50°10° to 55°13°)	51°11°	0%	0 mph0 km/h, gusts 6 mph10 km/h	86%	10%	0
Mon 12a	Clear	50°10° (likely 48°9° to 53°12°)	50°10°	0%	0 mph0 km/h, gusts 6 mph9 km/h	89%	2%	0
Mon 1a	Clear	49°9° (likely 46°8° to 52°11°)	49°9°	0%	0 mph0 km/h, gusts 7 mph12 km/h	93%	5%	0
Mon 2a	Clear	48°9° (likely 43°6° to 52°11°)	48°9°	0%	0 mph0 km/h, gusts 5 mph9 km/h	93%	10%	0
Mon 3a	Clear	47°8° (likely 43°6° to 51°11°)	47°8°	0%	0 mph0 km/h, gusts 4 mph7 km/h	93%	18%	0
Mon 4a	Partly cloudy	46°8° (likely 42°6° to 51°11°)	46°8°	0%	0 mph0 km/h, gusts 3 mph5 km/h	93%	40%	0
Mon 5a	Partly cloudy	46°8° (likely 42°6° to 50°10°)	46°8°	0%	0 mph0 km/h, gusts 2 mph4 km/h	89%	54%	0
Mon 6a	Partly cloudy	45°7° (likely 41°5° to 49°9°)	45°7°	0%	0 mph0 km/h, gusts 2 mph4 km/h	93%	52%	0
Mon 7a	Partly cloudy	45°7° (likely 41°5° to 48°9°)	45°7°	0%	0 mph0 km/h, gusts 2 mph3 km/h	93%	26%	0
Mon 8a	Sunny	45°7° (likely 40°4° to 48°9°)	45°7°	0%	0 mph0 km/h, gusts 3 mph5 km/h	93%	20%	0
Mon 9a	Sunny	47°8° (likely 43°6° to 50°10°)	47°8°	0%	0 mph0 km/h, gusts 4 mph7 km/h	93%	23%	0
Mon 10a	Partly sunny	52°11° (likely 49°9° to 56°13°)	52°11°	0%	0 mph0 km/h, gusts 4 mph7 km/h	83%	44%	1
Mon 11a	Sunny	59°15° (likely 57°14° to 61°16°)	59°15°	0%	0 mph0 km/h, gusts 4 mph6 km/h	67%	8%	3
Mon 12p	Sunny	64°18° (likely 62°17° to 65°18°)	64°18°	0%	0 mph0 km/h, gusts 5 mph9 km/h	58%	12%	4
Mon 1p	Sunny	68°20° (likely 66°19° to 68°20°)	68°20°	0%	0 mph0 km/h, gusts 7 mph11 km/h	51%	22%	5
Mon 2p	Mostly sunny	70°21° (likely 69°21° to 70°21°)	70°21°	0%	0 mph0 km/h, gusts 8 mph14 km/h	46%	40%	5
Mon 3p	Mostly sunny	73°23° (likely 71°22° to 73°23°)	73°23°	0%	0 mph0 km/h, gusts 10 mph17 km/h	41%	50%	5
Mon 4p	Mostly sunny	74°23° (likely 71°22° to 74°23°)	74°23°	0%	0 mph0 km/h, gusts 10 mph16 km/h	40%	35%	4
Mon 5p	Mostly sunny	73°23° (likely 70°21° to 73°23°)	73°23°	0%	0 mph0 km/h, gusts 9 mph15 km/h	41%	39%	2
Mon 6p	Partly sunny	70°21° (likely 66°19° to 70°21°)	70°21°	0%	0 mph0 km/h, gusts 6 mph9 km/h	53%	73%	1

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Mostly sunny. High 71°22°, low 45°7°. Typical 68°20° / 44°7°. Dry. Forecasts agree.
1. Evening
  6 PM–midnight
  Mostly clear, 61°16°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 46°8°
  Dry
Official NWS forecast
Tonight: Mostly clear, with a low around 45. Wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
70°21°–71°22°
Low, likely
39°4°–45°7°
Typical high / low
68°20° / 44°7°
Wind
5 mph8 km/h, gusts 11 mph18 km/h
UV peak
5
Tomorrow, Oct 25. Mostly sunny. High 72°22°, low 45°7°. Typical 68°20° / 44°7°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  Dry
Official NWS forecast
Day: Sunny, with a high near 72. Northeast wind 0 to 5 mph.
Night: Mostly clear, with a low around 45. Northeast wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
70°21°–72°22°
Low, likely
41°5°–48°9°
Typical high / low
68°20° / 44°7°
Wind
7 mph12 km/h, gusts 17 mph28 km/h
UV peak
5
Monday, Oct 26. Partly sunny. High 74°23°, low 44°7°. Typical 67°19° / 43°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°8°
  Dry
Official NWS forecast
Day: Mostly sunny, with a high near 74. Northeast wind around 0 mph.
Night: Partly cloudy, with a low around 44. Northeast wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
71°22°–74°23°
Low, likely
40°4°–48°9°
Typical high / low
67°19° / 43°6°
Wind
6 mph9 km/h, gusts 13 mph22 km/h
UV peak
5
Tuesday, Oct 27. Partly sunny. High 76°24°, low 46°8°. Typical 67°19° / 43°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 60°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 49°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 76. Wind around 0 mph.
Night: Partly cloudy, with a low around 46. Wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
72°22°–76°24°
Low, likely
42°6°–47°8°
Typical high / low
67°19° / 43°6°
Wind
4 mph6 km/h
UV peak
5
Wednesday, Oct 28. Cloudy. High 74°23°, low 46°8°. Typical 66°19° / 43°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 71°22°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly cloudy, with a high near 74.
Night: Partly cloudy, with a low around 46.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
71°22°–74°23°
Low, likely
43°6°–51°11°
Typical high / low
66°19° / 43°6°
Wind
4 mph6 km/h, gusts 13 mph21 km/h
UV peak
4
Thursday, Oct 29. Mostly sunny. High 76°24°, low 48°9°. Typical 66°19° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Partly sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 76.
Night: Mostly clear, with a low around 48.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
72°22°–76°24°
Low, likely
46°8°–49°9°
Typical high / low
66°19° / 42°6°
Wind
6 mph9 km/h, gusts 14 mph22 km/h
UV peak
4
Friday, Oct 30. Partly sunny. High 78°26°, low 52°11°. Typical 66°19° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 75°24°
  Dry
3. Evening
  6 PM–midnight
  Clear, 63°17°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 78.
Night: Partly cloudy, with a low around 52.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
75°24°–78°26°
Low, likely
48°9°–52°11°
Typical high / low
66°19° / 42°6°
Wind
6 mph9 km/h, gusts 15 mph24 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 79°26°, low 54°12°. Typical 65°18° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 75°24°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 67°19°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 62°17°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 79.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
72°22°–79°26°
Low, likely
52°11°–55°13°
Typical high / low
65°18° / 42°6°
Wind
6 mph10 km/h, gusts 16 mph25 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 76°24°, low 60°16°. Typical 65°18° / 41°5°. Rain 0.05 in1.3 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 62°17°
  30% chance
2. Afternoon
  noon–6 PM
  Mostly sunny, 76°24°
  30% chance
3. Evening
  6 PM–midnight
  Drizzle, 69°20°
  30% chance · 0.01 in0.3 mm
4. Overnight
  midnight–6 AM
  Rain, 62°17°
  20% chance · 0.28 in7 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
74°23°–79°26°
Low, likely
54°12°–67°19°
Typical high / low
65°18° / 41°5°
Wind
11 mph18 km/h, gusts 28 mph45 km/h
UV peak
4
Monday, Nov 2. Rain. High 72°22°, low 54°12°. Typical 65°18° / 41°5°. Rain 0.57 in14 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Rain, 63°17°
  20% chance · 0.4 in10 mm
2. Afternoon
  noon–6 PM
  Sunny, 67°20°
  30% chance · 0.05 in1.3 mm
3. Evening
  6 PM–midnight
  Mostly clear, 57°14°
  30% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
62°17°–80°27°
Low, likely
46°8°–62°17°
Typical high / low
65°18° / 41°5°
Wind
13 mph21 km/h, gusts 30 mph48 km/h
UV peak
4

10 days15 days30 days

The outlook

Today
Dry, high 71°, low 45°.
Tomorrow
Dry, high 72°, low 45°.
Monday
Dry, high 74°, low 44°.
Rest of week
Mostly dry, highs 72–79°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (MRX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Tennessee River below Watts Bar Dam

5.6 mi

Below flood stage

Level: 680 ft

Forecast peak 680 ft Sun 1 AM

Reading from Sat 5 PM · NWS gauge page

Sewee Creek at Decatur 5NE

4.4 mi

Below flood stage

Level: 0.3 ft
Flow: 82 cfs

Reading from Sat 5 PM · NWS gauge page

Tennessee River above Watts Bar Dam

6.7 mi

Level: 741 ft

Reading from Sat 5 PM · NWS gauge page

Oostanaula Creek at Sanford 1SE

15 mi

Below flood stage

Level: 2.2 ft
Flow: 41 cfs

Reading from Sat 5:15 PM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 71% less heating than a typical week.

This week 20Typical 71

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 14
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at.

Comfort

Dry air outside (dew point 43°F).

Open the windows?

Sun, 12:00 PM–7:00 PM

Good stretch to open the windows (air quality forecast not available for part of this window).

Is this typical?

Dayton 2se · official normals 1991–2020 · records 1956–2026

Oct 24, today vs a typical year

Today’s expected high is 3°2° warmer than typical.

Last 7 days vs normal

On average 2°1° colder than normal (daily mean temperature).

−7°−4°SunOct 18
−6°−4°MonOct 19
−4°−2°TueOct 20
±0°WedOct 21
+1°±0°ThuOct 22
+2°+1°FriOct 23
+2°+1°SatOct 24

Decatur weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 59 min; Losing 2 min 7 s a day; shortest Dec 21, 1 h 14 min less
Golden hour: 6:17–7:08 PM; Morning 7:37–8:28 AM
Blue hour: 7:08–7:18 PM; Morning 7:27–7:37 AM; first light 7:27 AM

Stars tonight? Fair

Mostly clear 10 PM–7:28 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 6:09 AM · rises 5:48 PM
Full moon: Oct 26
New moon: Nov 9

Looking southeast from Decatur. The highest point on the skyline is about 4,100 ft, 39 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Decatur, TN weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Tennessee River below Watts Bar Dam

Sewee Creek at Decatur 5NE

Tennessee River above Watts Bar Dam

Oostanaula Creek at Sanford 1SE

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon