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Tonight · Sat, 10 October 2026

Knoxville stargazing forecast tonight

Hourly clear-sky conditions for observing: cloud by layer, transparency, estimated seeing, moonlight and true astronomical darkness.

35.961°N 83.921°W ·277 m ·Tennessee, United States

NearbyMaryvilleAshevilleJohnson CityChattanoogaMore nearby
43
/100
Fair conditions
at peak

Marginal, but there is a 1 hour gap from 22:00.

Site darkness · peer measure
Bright skyNot multiplied into the conditions score
18.7–19.4 mag/arcsec²

The score describes tonight’s conditions. Site darkness helps you choose what to observe.

See target outlook ↓Planet observing times →
Best months at Knoxville, Tennessee →Moonless nights →
Tonight in context · local sky & season

October historically: 11.7 qualifying nights/month on average (2005–2024). Regional cloud and darkness history, not tonight’s probability or a comparison with the conditions score.

A qualifying historical night has at least 3 hours of astronomical darkness and mean nighttime cloud ≤30%. This does not measure steady air or target visibility. Seasonal history →

Saturn: about 9.0h above 20° during this observing night’s darkness. Longest sampled dark-time opportunity among our four planet targets; not a weather ranking. Planet times →

Position calculations use roughly 20-minute samples. Clouds, skyglow and local obstructions still matter. Milky Way timing →

Best window
22:00 – 23:00
Window quality
43 / 100 avg
Astronomical dark
21:00 – 07:00
Moon
New moon, 1%
Transparency at peak
0.32
Seeing at peak (est.)
0.46
Visual limit (modelled)
3.0–5.0 mag
Tonight's limiting factor
Transparency

Transparency 0.32 — haze and water vapour will cost you the faintest targets. What this means →

The night, hour by hour

Colour = score · Luminance = everything else
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
12
29
43
22
11
25
24
39
9
Score
BEST WINDOW · 2 H
Low cloud
46%
44%
48%
21%
56%
15%
33%
30%
20%
100%
100%
99%
27%
33%
Mid cloud
6%
32%
18%
15%
20%
79%
41%
52%
26%
29%
18%
14%
16%
27%
High cloud
0%
0%
0%
0%
0%
40%
3%
0%
0%
0%
0%
0%
0%
0%
Transparency
0.10
0.39
0.45
0.32
0.27
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
Seeing
0.43
0.47
0.45
0.46
0.54
0.63
0.80
0.96
1.00
1.00
0.98
0.90
0.81
0.70
Moon clear
0%
down
down
down
down
down
down
down
down
down
down
down
down
down
19
20
21
22
23
00
01
02
03
04
05
06
07
08
Inspect

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Score inspectorWhy this hour scored what it did Open peakClose
22 Fair · 43/100
Starting from
100
Cloud
−32
Transparency
−19
Seeing
−7
Moonlight
−0
Darkness
−0
Score
43
CLOUD 32% LOW 21% MID 15% HIGH 0% SUN -35.3° MOON -35.4° / 0% WIND 7 TEMP 21°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.

What can you actually do tonight?

This is GoodSeeing’s decision layer: the same forecast is weighted for your target and site darkness. Planetary work barely cares about moonlight; long exposures can fail on high cloud a visual observer would barely notice. Your choice is remembered on this device and becomes the default for new alert rules.

NO USABLE WINDOW FOR THIS TARGET TONIGHT

Darkness and moonlight dominate. Faint fuzzies need a genuinely dark sky more than they need steady air.

19212301030507
SITE GLOW LIMITS THIS TARGET
SET UP 02:30 · OBSERVE 03:00–04:00 · 1H · MEAN 51

Seeing is everything and moonlight is irrelevant. Bright targets punch through twilight, so darkness barely counts.

19212301030507
CLOUD BREAKS 03:00CLOUD RETURNS 04:00MOONLIGHT IGNORED FOR THIS TARGET
NO USABLE WINDOW FOR THIS TARGET TONIGHT

Tolerates soft seeing, but high cloud wrecks a wide frame and moonlight raises the background everywhere.

19212301030507
SITE GLOW LIMITS THIS TARGET
NO USABLE WINDOW FOR THIS TARGET TONIGHT

Needs conditions to hold still for hours. Sustained transparency matters more than any single good hour.

19212301030507
SITE GLOW LIMITS THIS TARGET
NO USABLE WINDOW FOR THIS TARGET TONIGHT

Naked eye, whole sky. Total cloud and moonlight are the only things that count.

19212301030507
SITE GLOW LIMITS THIS TARGET

Deep-sky visual is your current default.

A darker option

Cherry Springs State Park

825 km away · Threatened dark sky · 21.6–21.8 mag/arcsec²

13conditions tonight
See the trade-off →

The next week of nights

Tonight · 10 Oct
43
Fair
MOON 1%
22:00–23:00
Tomorrow · 11 Oct
62
Good
MOON 3%
04:00–07:00
Monday · 12 Oct
65
Good
MOON 7%
21:00–07:00
Tuesday · 13 Oct
64
Good
MOON 13%
02:00–03:00
Wednesday · 14 Oct
63
Good
MOON 21%
02:00–03:00
Thursday · 15 Oct
63
Good
MOON 29%
02:00–03:00
Friday · 16 Oct
66
Good
MOON 37%
02:00–03:00

Open a night for its forecast times. Later forecasts may have wider time steps; missing hours are not interpolated.

Tonight · 10 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
12
29
43
22
11
25
24
39
9
Score
Low cloud
46%
44%
48%
21%
56%
15%
33%
30%
20%
100%
100%
99%
27%
33%
Mid cloud
6%
32%
18%
15%
20%
79%
41%
52%
26%
29%
18%
14%
16%
27%
High cloud
0%
0%
0%
0%
0%
40%
3%
0%
0%
0%
0%
0%
0%
0%
Transparency
0.10
0.39
0.45
0.32
0.27
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
Seeing
0.43
0.47
0.45
0.46
0.54
0.63
0.80
0.96
1.00
1.00
0.98
0.90
0.81
0.70
Moon clear
0%
down
down
down
down
down
down
down
down
down
down
down
down
down
19
20
21
22
23
00
01
02
03
04
05
06
07
08

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Tomorrow · 11 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
3
21
2
2
8
14
59
61
62
15
Score
Low cloud
100%
86%
56%
95%
96%
84%
100%
100%
77%
5%
2%
2%
0%
0%
Mid cloud
100%
44%
26%
28%
29%
16%
2%
6%
1%
0%
0%
0%
0%
0%
High cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
Transparency
0.18
0.18
0.15
0.12
0.10
0.11
0.10
0.11
0.12
0.10
0.10
0.10
0.10
0.10
Seeing
0.75
0.79
0.81
0.85
0.88
0.89
0.89
0.88
0.87
0.88
0.92
0.94
0.97
0.99
Moon clear
2%
down
down
down
down
down
down
down
down
down
down
down
down
down
19
20
21
22
23
00
01
02
03
04
05
06
07
08

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Monday · 12 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
32
65
65
65
64
63
63
63
63
63
63
16
Score
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
High cloud
73%
7%
2%
2%
1%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Transparency
0.26
0.19
0.17
0.15
0.14
0.11
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
Seeing
1.00
0.97
0.98
0.99
0.98
0.95
0.94
0.95
0.94
0.95
0.94
0.93
0.96
0.96
Moon clear
6%
6%
down
down
down
down
down
down
down
down
down
down
down
down
19
20
21
22
23
00
01
02
03
04
05
06
07
08

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Tuesday · 13 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
38
64
Score
Low cloud
2%
0%
0%
0%
Mid cloud
0%
0%
0%
0%
High cloud
0%
0%
0%
0%
Transparency
0.68
0.36
0.10
0.10
Seeing
0.86
0.92
0.99
1.00
Moon clear
10%
12%
down
down
14
20
02
08

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Wednesday · 14 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
40
63
Score
Low cloud
0%
0%
0%
5%
Mid cloud
1%
0%
1%
0%
High cloud
2%
0%
7%
9%
Transparency
0.71
0.35
0.14
0.10
Seeing
1.00
1.00
1.00
1.00
Moon clear
17%
19%
down
down
14
20
02
08

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Thursday · 15 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
36
63
Score
Low cloud
0%
0%
2%
32%
Mid cloud
0%
5%
1%
12%
High cloud
0%
0%
0%
0%
Transparency
0.57
0.17
0.10
0.11
Seeing
1.00
1.00
1.00
0.85
Moon clear
24%
27%
down
down
14
20
02
08

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Friday · 16 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
45
66
Score
Low cloud
81%
1%
2%
0%
Mid cloud
76%
0%
0%
0%
High cloud
20%
0%
23%
2%
Transparency
0.18
0.60
0.52
0.37
Seeing
0.56
0.74
0.81
0.84
Moon clear
33%
35%
down
down
14
20
02
08

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Planning a trip?

Compare the next eight weekends → · Best months to visit → · Moonless nights →

More nearby locations 8 options · openclose

About this forecast

Exact-coordinate weather, sky geometry and site context.

Full method →20-year baseline →
Sources and scoring details openclose

Conditions for Knoxville, Tennessee, United States are computed from the MET Norway forecast model for these exact coordinates, combined with sun and moon positions we calculate directly. The score weighs cloud cover by layer, atmospheric transparency, estimated seeing, moonlight and astronomical twilight. Site darkness is shown separately, then used only where artificial skyglow physically changes moon contrast, haze scattering, visual limits and target suitability.