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Tonight · Sat, 10 October 2026

San Angelo stargazing forecast tonight

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

31.464°N 100.437°W ·564 m ·Texas, United States

NearbyAbileneStephenvilleUvaldeLubbockMore nearby
91
/100
Excellent conditions
at peak

A genuinely good night — 10 hours of clear, dark sky from 21:00.

Site darkness · peer measure
Bright skyNot multiplied into the conditions score
19.4–20.1 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 San Angelo, Texas →Moonless nights →
Tonight in context · local sky & season

October historically: 17.2 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
21:00 – 07:00
Window quality
73 / 100 avg
Astronomical dark
21:00 – 07:00
Moon
New moon, 1%
Transparency at peak
0.89
Seeing at peak (est.)
0.83
Visual limit (modelled)
4.5–6.0 mag
Tonight's limiting factor
Nothing much

No single factor is holding this night back. Go out.

The night, hour by hour

Colour = score · Luminance = everything else
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
32
91
87
84
79
73
65
65
63
59
59
18
Score
BEST WINDOW · 11 H
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
2%
4%
5%
5%
3%
Mid cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
High cloud
0%
0%
0%
1%
2%
6%
8%
15%
6%
3%
6%
0%
0%
0%
Transparency
1.00
0.98
0.89
0.88
0.80
0.70
0.60
0.51
0.42
0.34
0.29
0.24
0.17
0.14
Seeing
0.66
0.79
0.83
0.67
0.71
0.71
0.63
0.54
0.51
0.53
0.56
0.58
0.60
0.60
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
21 Excellent · 91/100
Starting from
100
Cloud
−0
Transparency
−4
Seeing
−4
Moonlight
−0
Darkness
−0
Score
91
CLOUD 0% LOW 0% MID 0% HIGH 0% SUN -22.9° MOON -22.0° / 0% WIND 4 TEMP 23°
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 19:30 · OBSERVE 20:00–08:00 · 12H · MEAN 70

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

19212301030507
TWILIGHT BEGINS 08:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 20:30 · OBSERVE 21:00–04:00 · 7H · MEAN 42

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

19212301030507
ASTRONOMICAL DARK FROM 21:00SITE GLOW LIMITS FAINT TARGETS
SET UP 20:30 · OBSERVE 21:00–02:00 · 5H · MEAN 48

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

19212301030507
ASTRONOMICAL DARK FROM 21:00
SET UP 20:30 · OBSERVE 21:00–01:00 · 4H · MEAN 38

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

19212301030507
ASTRONOMICAL DARK FROM 21:00SITE GLOW LIMITS FAINT TARGETS

Deep-sky visual is your current default.

A darker option

Big Bend National Park

365 km away · Natural-dark sky · 21.9–21.9 mag/arcsec²

87conditions tonight
See the trade-off →

The next week of nights

Tonight · 10 Oct
91
Excellent
MOON 1%
21:00–07:00
Tomorrow · 11 Oct
85
Excellent
MOON 3%
21:00–07:00
Monday · 12 Oct
75
Excellent
MOON 7%
21:00–07:00
Tuesday · 13 Oct
82
Excellent
MOON 13%
01:00–02:00
Wednesday · 14 Oct
62
Good
MOON 21%
01:00–02:00
Thursday · 15 Oct
62
Good
MOON 29%
01:00–02:00
Friday · 16 Oct
67
Good
MOON 37%
01:00–02:00

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
32
91
87
84
79
73
65
65
63
59
59
18
Score
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
2%
4%
5%
5%
3%
Mid cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
High cloud
0%
0%
0%
1%
2%
6%
8%
15%
6%
3%
6%
0%
0%
0%
Transparency
1.00
0.98
0.89
0.88
0.80
0.70
0.60
0.51
0.42
0.34
0.29
0.24
0.17
0.14
Seeing
0.66
0.79
0.83
0.67
0.71
0.71
0.63
0.54
0.51
0.53
0.56
0.58
0.60
0.60
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
31
85
85
84
81
80
76
69
65
60
55
16
Score
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
4%
9%
20%
100%
Mid cloud
0%
0%
0%
0%
0%
0%
0%
1%
0%
0%
0%
0%
0%
0%
High cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Transparency
0.94
0.87
0.84
0.83
0.83
0.77
0.74
0.62
0.42
0.28
0.20
0.15
0.12
0.12
Seeing
0.48
0.58
0.62
0.63
0.61
0.57
0.57
0.59
0.60
0.63
0.66
0.69
0.70
0.69
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
28
74
75
75
73
64
57
47
42
45
47
Score
Low cloud
12%
7%
2%
1%
0%
0%
2%
3%
4%
4%
10%
16%
100%
Mid cloud
0%
0%
0%
0%
0%
1%
9%
13%
19%
24%
16%
6%
2%
High cloud
0%
0%
1%
0%
0%
0%
0%
6%
21%
22%
9%
0%
0%
Transparency
0.67
0.62
0.56
0.54
0.47
0.43
0.42
0.38
0.31
0.23
0.15
0.10
0.10
Seeing
0.63
0.71
0.71
0.72
0.78
0.82
0.74
0.69
0.66
0.66
0.69
0.71
0.70
Moon clear
6%
7%
down
down
down
down
down
down
down
down
down
down
down
19
20
21
22
23
00
01
02
03
04
05
06
07

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
82
Score
Low cloud
17%
0%
100%
Mid cloud
10%
0%
0%
High cloud
1%
0%
0%
Transparency
0.86
0.69
0.15
Seeing
0.64
0.74
0.82
Moon clear
12%
down
down
19
01
07

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
62
16
Score
Low cloud
2%
3%
23%
Mid cloud
74%
5%
2%
High cloud
0%
17%
0%
Transparency
1.00
0.49
0.10
Seeing
0.72
0.70
0.74
Moon clear
19%
down
down
19
01
07

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
62
21
Score
Low cloud
2%
0%
13%
Mid cloud
57%
2%
1%
High cloud
22%
0%
0%
Transparency
0.16
0.10
0.10
Seeing
0.87
0.90
1.00
Moon clear
27%
down
down
19
01
07

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
67
15
Score
Low cloud
4%
8%
2%
Mid cloud
4%
5%
50%
High cloud
0%
0%
0%
Transparency
0.66
0.40
0.27
Seeing
0.90
0.98
0.99
Moon clear
35%
down
down
19
01
07

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 5 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 San Angelo, Texas, 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.