Observed 5:35 PM CDT at K1M5

Castalian Springs, TN weather

Sunny and 68°20°.

Mostly agree

Now 68°20°

Sunny

Wind: Calm; Light through 6 AM
Dew point: 45°7°; Comfortable
UV tomorrow: 5Moderate; Moderate 11 AM–4 PM · peak 5
Pressure: 30.33 inHg1027 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

Drops 12°7° until 9 PM (71°22° → 59°15°)
Below 60°16° tonight after 8 PM
Above 60°16° tomorrow by 10 AM
Drops 12°7° tomorrow night 6–9 PM (71°22° → 59°15°)
Fog tomorrow night 1–9 AM

TonightDown to 46°8° by 5 AM · Clear
Tomorrow morningUp to 67°19° by 11 AM · Clear
Tomorrow afternoonUp to 77°25° by 4 PM · Partly cloudy
Tomorrow nightDown to 46°8° by 5 AM · Partly cloudy
Monday morningUp to 67°19° by 11 AM · Partly cloudy
Monday afternoonUp to 76°24° by 2 PM · Mostly 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 6p	Clear	71°22° (likely 65°18° to 71°22°)	71°22°	0%	0 mph0 km/h, gusts 5 mph8 km/h	36%	1%	0
Sat 7p	Clear	66°19° (likely 61°16° to 67°19°)	66°19°	0%	0 mph0 km/h, gusts 5 mph8 km/h	45%	7%	0
Sat 8p	Clear	59°15° (likely 59°15° to 65°18°)	59°15°	0%	0 mph0 km/h, gusts 6 mph10 km/h	57%	2%	0
Sat 9p	Clear	56°13° (likely 56°13° to 64°18°)	56°13°	0%	0 mph0 km/h, gusts 7 mph11 km/h	66%	41%	0
Sat 10p	Clear	54°12° (likely 54°12° to 63°17°)	54°12°	0%	0 mph0 km/h, gusts 8 mph12 km/h	71%	11%	0
Sat 11p	Clear	53°12° (likely 52°11° to 62°17°)	53°12°	0%	0 mph0 km/h, gusts 8 mph12 km/h	74%	21%	0
Sun 12a	Clear	51°11° (likely 50°10° to 60°16°)	51°11°	0%	0 mph0 km/h, gusts 8 mph12 km/h	80%	10%	0
Sun 1a	Clear	50°10° (likely 49°9° to 59°15°)	50°10°	0%	0 mph0 km/h, gusts 6 mph10 km/h	83%	0%	0
Sun 2a	Clear	48°9° (likely 47°8° to 57°14°)	48°9°	0%	0 mph0 km/h, gusts 4 mph7 km/h	89%	0%	0
Sun 3a	Clear	47°8° (likely 45°7° to 57°14°)	47°8°	0%	0 mph0 km/h, gusts 3 mph5 km/h	89%	0%	0
Sun 4a	Clear	47°8° (likely 44°7° to 55°13°)	47°8°	0%	0 mph0 km/h, gusts 4 mph6 km/h	89%	7%	0
Sun 5a	Clear	46°8° (likely 43°6° to 54°12°)	46°8°	0%	0 mph0 km/h, gusts 5 mph7 km/h	89%	12%	0
Sun 6a	Clear	46°8° (likely 42°6° to 52°11°)	46°8°	0%	0 mph0 km/h, gusts 5 mph8 km/h	93%	12%	0
Sun 7a	Sunny	45°7° (likely 42°6° to 51°11°)	45°7°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	13%	0
Sun 8a	Sunny	48°9° (likely 44°7° to 53°12°)	48°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	89%	13%	0
Sun 9a	Sunny	54°12° (likely 51°11° to 59°15°)	54°12°	0%	0 mph0 km/h, gusts 8 mph13 km/h	77%	0%	1
Sun 10a	Sunny	63°17° (likely 59°15° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 10 mph16 km/h	58%	5%	2
Sun 11a	Sunny	67°19° (likely 65°18° to 68°20°)	67°19°	0%	0 mph0 km/h, gusts 9 mph14 km/h	49%	0%	4
Sun 12p	Sunny	72°22° (likely 69°21° to 72°22°)	72°22°	0%	0 mph0 km/h, gusts 6 mph10 km/h	41%	3%	4
Sun 1p	Sunny	74°23° (likely 72°22° to 74°23°)	74°23°	0%	0 mph0 km/h, gusts 6 mph9 km/h	37%	28%	5
Sun 2p	Sunny	75°24° (likely 73°23° to 76°24°)	75°24°	0%	0 mph0 km/h, gusts 5 mph9 km/h	36%	39%	4
Sun 3p	Mostly sunny	76°24° (likely 74°23° to 76°24°)	76°24°	0%	0 mph0 km/h, gusts 7 mph11 km/h	33%	42%	4
Sun 4p	Sunny	77°25° (likely 73°23° to 77°25°)	77°25°	0%	0 mph0 km/h, gusts 7 mph11 km/h	32%	41%	2
Sun 5p	Sunny	75°24° (likely 70°21° to 75°24°)	75°24°	0%	0 mph0 km/h, gusts 6 mph10 km/h	36%	39%	1
Sun 6p	Mostly clear	71°22° (likely 65°18° to 71°22°)	71°22°	0%	0 mph0 km/h, gusts 5 mph8 km/h	39%	45%	0
Sun 7p	Mostly clear	66°19° (likely 61°16° to 66°19°)	66°19°	0%	0 mph0 km/h, gusts 6 mph10 km/h	48%	27%	0
Sun 8p	Clear	59°15° (likely 58°14° to 65°18°)	59°15°	0%	0 mph0 km/h, gusts 5 mph8 km/h	62%	5%	0
Sun 9p	Clear	56°13° (likely 55°13° to 63°17°)	56°13°	0%	0 mph0 km/h, gusts 4 mph6 km/h	69%	42%	0
Sun 10p	Clear	54°12° (likely 52°11° to 61°16°)	54°12°	0%	0 mph0 km/h, gusts 2 mph3 km/h	86%	33%	0
Sun 11p	Clear	52°11° (likely 49°9° to 60°16°)	52°11°	0%	0 mph0 km/h, gusts 3 mph4 km/h	93%	9%	0
Mon 12a	Clear	50°10° (likely 47°8° to 58°14°)	50°10°	0%	0 mph0 km/h, gusts 4 mph7 km/h	96%	20%	0
Mon 1a	Fog	49°9° (likely 46°8° to 58°14°)	49°9°	0%	0 mph0 km/h, gusts 5 mph8 km/h	100%	45%	0
Mon 2a	Fog	48°9° (likely 45°7° to 56°13°)	48°9°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	60%	0
Mon 3a	Fog	47°8° (likely 43°6° to 55°13°)	47°8°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	49%	0
Mon 4a	Fog	47°8° (likely 43°6° to 53°12°)	47°8°	0%	0 mph0 km/h, gusts 5 mph8 km/h	100%	28%	0
Mon 5a	Fog	46°8° (likely 42°6° to 53°12°)	46°8°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	23%	0
Mon 6a	Fog	46°8° (likely 42°6° to 52°11°)	46°8°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	23%	0
Mon 7a	Fog	46°8° (likely 41°5° to 51°11°)	46°8°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	26%	0
Mon 8a	Fog	48°9° (likely 43°6° to 53°12°)	48°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	53%	0
Mon 9a	Cloudy	54°12° (likely 49°9° to 59°15°)	54°12°	0%	0 mph0 km/h, gusts 5 mph8 km/h	90%	65%	1
Mon 10a	Cloudy	62°17° (likely 58°14° to 64°18°)	62°17°	0%	0 mph0 km/h, gusts 9 mph15 km/h	70%	60%	2
Mon 11a	Cloudy	67°19° (likely 65°18° to 68°20°)	67°19°	0%	0 mph0 km/h, gusts 8 mph13 km/h	59%	62%	4
Mon 12p	Partly sunny	71°22° (likely 69°21° to 72°22°)	71°22°	0%	0 mph0 km/h, gusts 6 mph10 km/h	49%	76%	4
Mon 1p	Partly sunny	73°23° (likely 72°22° to 75°24°)	73°23°	0%	0 mph0 km/h, gusts 5 mph7 km/h	44%	77%	4
Mon 2p	Cloudy	76°24° (likely 73°23° to 76°24°)	76°24°	0%	0 mph0 km/h, gusts 4 mph6 km/h	39%	84%	4
Mon 3p	Cloudy	76°24° (likely 73°23° to 76°24°)	76°24°	0%	0 mph0 km/h, gusts 4 mph7 km/h	37%	81%	3
Mon 4p	Partly sunny	76°24° (likely 72°22° to 76°24°)	76°24°	0%	0 mph0 km/h, gusts 5 mph7 km/h	37%	90%	2
Mon 5p	Partly sunny	73°23° (likely 69°21° to 73°23°)	73°23°	0%	0 mph0 km/h, gusts 4 mph7 km/h	41%	95%	1

Days ahead

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

Today, Oct 24. Fog. High 76°24°, low 45°7°. Typical 70°21° / 43°6°. Dry. Mostly agree.
1. Evening
  6 PM–midnight
  Clear, 59°15°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 46°8°
  Dry
Official NWS forecast
Tonight: Patchy fog after 1am. Mostly clear, with a low around 45. East southeast wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
75°24°–77°25°
Low, likely
42°6°–48°9°
Typical high / low
70°21° / 43°6°
Wind
9 mph14 km/h, gusts 18 mph29 km/h
UV peak
5
Tomorrow, Oct 25. Fog. High 77°25°, low 46°8°. Typical 69°21° / 43°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 77°25°
  Dry
3. Evening
  6 PM–midnight
  Clear, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Fog, 46°8°
  Dry
Official NWS forecast
Day: Patchy fog before 9am. Sunny, with a high near 77. Southwest wind around 0 mph.
Night: Areas of fog after midnight. Mostly clear, with a low around 46. East northeast wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
74°23°–77°25°
Low, likely
42°6°–51°11°
Typical high / low
69°21° / 43°6°
Wind
8 mph13 km/h
UV peak
5
Monday, Oct 26. Fog. High 76°24°, low 45°7°. Typical 69°21° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 76°24°
  Dry
3. Evening
  6 PM–midnight
  Clear, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°8°
  Dry
Official NWS forecast
Day: Areas of fog before 9am. Mostly sunny, with a high near 76. West northwest wind around 0 mph.
Night: Areas of fog after midnight. Partly cloudy, with a low around 45. North northeast wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
73°23°–76°24°
Low, likely
41°5°–51°11°
Typical high / low
69°21° / 42°6°
Wind
7 mph11 km/h, gusts 15 mph23 km/h
UV peak
4
Tuesday, Oct 27. Fog. High 78°26°, low 49°9°. Typical 68°20° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 76°24°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog before 8am. Mostly sunny, with a high near 78. East southeast wind around 0 mph.
Night: Mostly cloudy, with a low around 49. East southeast wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
74°23°–78°26°
Low, likely
41°5°–51°11°
Typical high / low
68°20° / 42°6°
Wind
4 mph7 km/h, gusts 9 mph15 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 77°25°, low 47°8°. Typical 68°20° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 74°24°
  Dry
3. Evening
  6 PM–midnight
  Clear, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 77. South wind 0 to 10 mph.
Night: Partly cloudy, with a low around 47. South southeast wind 0 to 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
72°22°–77°25°
Low, likely
46°8°–54°12°
Typical high / low
68°20° / 42°6°
Wind
8 mph13 km/h, gusts 24 mph39 km/h
UV peak
4
Thursday, Oct 29. Mostly sunny. High 78°26°, low 47°8°. Typical 68°20° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 76°24°
  Dry
3. Evening
  6 PM–midnight
  Clear, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 78.
Night: Mostly clear, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
74°23°–78°26°
Low, likely
46°8°–51°11°
Typical high / low
68°20° / 41°5°
Wind
7 mph12 km/h, gusts 20 mph33 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 80°27°, low 54°12°. Typical 67°19° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 78°26°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 63°17°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 56°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 80.
Night: Partly cloudy, with a low around 54.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
76°24°–80°27°
Low, likely
45°7°–54°12°
Typical high / low
67°19° / 41°5°
Wind
7 mph10 km/h, gusts 15 mph24 km/h
UV peak
4
Saturday, Oct 31. Mostly cloudy. High 79°26°, low 57°14°. Typical 67°19° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 60°15°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 78°26°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 69°21°
  Dry
4. Overnight
  midnight–6 AM
  Drizzle, 63°17°
  40% chance · 0.07 in1.8 mm
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
73°23°–79°26°
Low, likely
56°13°–59°15°
Typical high / low
67°19° / 41°5°
Wind
11 mph18 km/h, gusts 24 mph39 km/h
UV peak
3
Sunday, Nov 1. Showers. High 74°23°, low 62°17°. Typical 66°19° / 40°4°. Rain 0.54 in14 mm, 50% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 65°18°
  50% chance · 0.24 in6.1 mm
2. Afternoon
  noon–6 PM
  Drizzle, 73°23°
  50% chance · 0.15 in3.8 mm
3. Evening
  6 PM–midnight
  Showers, 68°20°
  30% chance · 0.19 in4.7 mm
4. Overnight
  midnight–6 AM
  Showers, 61°16°
  30% chance · 0.63 in16 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
72°22°–78°26°
Low, likely
57°14°–67°19°
Typical high / low
66°19° / 40°4°
Wind
16 mph26 km/h, gusts 36 mph58 km/h
UV peak
3
Monday, Nov 2. Showers. High 71°22°, low 54°12°. Typical 66°19° / 40°4°. Rain 0.66 in17 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 61°16°
  30% chance · 0.12 in3.1 mm
2. Afternoon
  noon–6 PM
  Partly sunny, 64°18°
  30% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Drizzle, 54°12°
  30% chance · 0.01 in0.3 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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
61°16°–77°25°
Low, likely
42°6°–65°18°
Typical high / low
66°19° / 40°4°
Wind
18 mph29 km/h, gusts 38 mph61 km/h
UV peak
4

10 days15 days30 days

The outlook

Today
Dry, high 76°, low 45°.
Tomorrow
Dry, high 77°, low 46°.
Monday
Dry, high 76°, low 45°.
Rest of week
Highs 71–80°; chance of precipitation on Sunday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (OHX) (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

Cumberland River at Carthage

22 mi

Below flood stage

Level: 6.1 ft

Forecast peak 9.2 ft Mon 7 PM

Reading from Sat 4 PM · NWS gauge page

Bledsoe Creek near Bethpage

3.4 mi

Level: 1.5 ft

Reading from Sat 4 PM · NWS gauge page

Cumberland River at Hunters Point

7.4 mi

Below flood stage

Level: 44.5 ft
Flow: 2,000 cfs

Reading from Sat 4:30 PM · NWS gauge page

Spring Creek below Lebanon

11 mi

Level: 1.4 ft

Reading from Sat 4:30 PM · NWS gauge page

For your home

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

Heating this week

About 74% less heating than a typical week.

This week 18Typical 69

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 10
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 45°F).

Open the windows?

Sun, 10:00 AM–7:00 PM

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

Is this typical?

LEBANON · official normals 1991–2020 · records 1902–2026

Oct 24, today vs a typical year

Today’s expected high is 6°3° warmer than typical.

Last 7 days vs normal

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

−8°−5°SunOct 18
−4°−2°MonOct 19
−1°TueOct 20
+1°±0°WedOct 21
+2°+1°ThuOct 22
+2°+1°FriOct 23
—SatOct 24

Castalian Springs weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 57 min; Losing 2 min 11 s a day; shortest Dec 21, 1 h 16 min less
Golden hour: 5:22–6:13 PM; Morning 6:44–7:36 AM
Blue hour: 6:13–6:23 PM; Morning 6:34–6:44 AM; first light 6:34 AM

Stars tonight? Fair

Clear 10 PM–6:35 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:16 AM · rises 4:54 PM
Full moon: Oct 25
New moon: Nov 9

Looking east from Castalian Springs. The highest point on the skyline is about 6,300 ft, 36 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.