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Tonight · Sat, 10 October 2026

Sandy stargazing forecast tonight

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

40.592°N 111.884°W ·1366 m ·Utah, United States

NearbyWest JordanRivertonSalt Lake CityLaytonMore nearby
36
/100
Fair conditions
at peak

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

Site darkness · peer measure
Bright urban skyNot multiplied into the conditions score
18.2–18.9 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 Sandy, Utah →Moonless nights →
Tonight in context · local sky & season

October historically: 13.5 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 8.7h 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
36 / 100 avg
Astronomical dark
21:00 – 07:00
Moon
New moon, 1%
Transparency at peak
0.90
Seeing at peak (est.)
0.41
Visual limit (modelled)
3.5–5.0 mag
Tonight's limiting factor
Thin high cloud

81% high cirrus. Visual observers shrug it off; long exposures integrate it. What this means →

Also limiting: Seeing. See the guide →

The night, hour by hour

Colour = score · Luminance = everything else
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
8
22
36
15
9
9
8
3
2
2
1
Score
BEST WINDOW · 2 H
Low cloud
2%
0%
0%
0%
0%
0%
1%
2%
6%
23%
32%
61%
56%
5%
Mid cloud
93%
75%
54%
23%
70%
83%
74%
77%
99%
100%
98%
99%
99%
98%
High cloud
98%
93%
89%
81%
88%
98%
99%
98%
97%
95%
100%
91%
96%
89%
Transparency
1.00
1.00
0.96
0.90
0.84
0.76
0.27
0.14
0.10
0.10
0.10
0.10
0.10
0.10
Seeing
0.58
0.37
0.41
0.41
0.45
0.50
0.52
0.58
0.66
0.78
0.82
0.88
0.86
0.88
Moon clear
down
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 · 36/100
Starting from
100
Cloud
−56
Transparency
−2
Seeing
−6
Moonlight
−0
Darkness
−0
Score
36
CLOUD 84% LOW 0% MID 23% HIGH 81% SUN -35.1° MOON -35.6° / 1% WIND 8 TEMP 20°
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
CLOUD NEVER DROPS BELOW 84%SITE GLOW LIMITS THIS TARGET
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

19212301030507
CLOUD NEVER DROPS BELOW 84%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

19212301030507
CLOUD NEVER DROPS BELOW 84%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
CLOUD NEVER DROPS BELOW 84%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
CLOUD NEVER DROPS BELOW 84%SITE GLOW LIMITS THIS TARGET

Deep-sky visual is your current default.

A darker option

Capitol Reef National Park

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

5conditions tonight
See the trade-off →

The next week of nights

Tonight · 10 Oct
36
Fair
MOON 1%
22:00–23:00
Tomorrow · 11 Oct
33
Poor

Cloud or fog is the strongest score limit at the best sampled time.

MOON 3%
Monday · 12 Oct
25
Poor

Cloud or fog is the strongest score limit at the best sampled time.

MOON 7%
Tuesday · 13 Oct
40
Fair
MOON 13%
06:00–07:00
Wednesday · 14 Oct
20
Poor

Cloud or fog is the strongest score limit at the best sampled time.

MOON 21%
Thursday · 15 Oct
59
Good
MOON 29%
00:00–01:00
Friday · 16 Oct
36
Fair
MOON 37%
00:00–01:00

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
8
22
36
15
9
9
8
3
2
2
1
Score
Low cloud
2%
0%
0%
0%
0%
0%
1%
2%
6%
23%
32%
61%
56%
5%
Mid cloud
93%
75%
54%
23%
70%
83%
74%
77%
99%
100%
98%
99%
99%
98%
High cloud
98%
93%
89%
81%
88%
98%
99%
98%
97%
95%
100%
91%
96%
89%
Transparency
1.00
1.00
0.96
0.90
0.84
0.76
0.27
0.14
0.10
0.10
0.10
0.10
0.10
0.10
Seeing
0.58
0.37
0.41
0.41
0.45
0.50
0.52
0.58
0.66
0.78
0.82
0.88
0.86
0.88
Moon clear
down
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
5
8
2
2
2
4
24
17
1
6
33
5
Score
Low cloud
4%
9%
35%
70%
65%
35%
16%
5%
14%
92%
83%
23%
10%
13%
Mid cloud
64%
93%
79%
100%
100%
100%
100%
68%
72%
66%
46%
23%
28%
23%
High cloud
20%
7%
40%
31%
57%
85%
43%
6%
19%
44%
16%
13%
7%
2%
Transparency
0.35
0.30
0.10
0.10
0.10
0.10
0.10
0.23
0.10
0.10
0.10
0.10
0.10
0.10
Seeing
0.30
0.24
0.46
0.90
1.00
1.00
0.99
0.88
0.84
0.70
0.74
0.64
0.65
0.75
Moon clear
3%
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
15
13
25
14
16
8
Score
Low cloud
15%
13%
10%
17%
12%
9%
12%
2%
Mid cloud
39%
47%
66%
44%
72%
59%
94%
91%
High cloud
9%
43%
73%
40%
50%
69%
22%
41%
Transparency
0.10
0.10
0.10
0.10
0.10
0.10
0.17
0.44
Seeing
0.96
0.90
0.88
0.93
0.99
0.86
1.00
1.00
Moon clear
7%
down
down
down
down
down
down
10%
19
20
21
22
23
00
06
12

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
9
40
Score
Low cloud
45%
39%
23%
9%
Mid cloud
94%
86%
27%
10%
High cloud
63%
0%
0%
0%
Transparency
0.10
0.11
0.23
0.36
Seeing
1.00
1.00
1.00
1.00
Moon clear
12%
down
down
down
18
00
06
12

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
20
Score
Low cloud
20%
48%
99%
99%
Mid cloud
86%
32%
100%
100%
High cloud
31%
27%
89%
1%
Transparency
0.34
0.10
0.22
0.10
Seeing
1.00
1.00
1.00
1.00
Moon clear
19%
down
down
down
18
00
06
12

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
59
33
Score
Low cloud
43%
6%
38%
6%
Mid cloud
44%
2%
14%
2%
High cloud
0%
0%
8%
6%
Transparency
0.28
0.10
0.10
0.57
Seeing
1.00
1.00
1.00
1.00
Moon clear
27%
down
down
down
18
00
06
12

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
36
29
Score
Low cloud
2%
19%
0%
5%
Mid cloud
6%
39%
64%
9%
High cloud
30%
2%
0%
0%
Transparency
0.48
0.23
0.22
0.39
Seeing
0.99
1.00
1.00
1.00
Moon clear
35%
down
down
down
18
00
06
12

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 Sandy, Utah, 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.