GoodSeeing Guides
Home › Locations › Cherry Springs State Park
Tonight · Sat, 10 October 2026

Cherry Springs State Park stargazing forecast tonight

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

41.663°N 77.816°W ·701 m ·Pennsylvania, United States

NearbyWilliamsportState CollegeIthacaFort ErieMore nearby
25
/100
Poor conditions
at peak

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

Site darkness · peer measure
Threatened dark skyNot multiplied into the conditions score
21.6–21.8 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 Cherry Springs State Park, Pennsylvania →Moonless nights →
Tonight in context · local sky & season

October historically: 5.2 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 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
None tonight
Window quality
—
Astronomical dark
21:00 – 06:00
Moon
New moon, 1%
Transparency at peak
0.63
Seeing at peak (est.)
0.83
Visual limit (modelled)
5.5–7.0 mag
Tonight's limiting factor
Thin high cloud

95% high cirrus. Visual observers shrug it off; long exposures integrate it. What this means →

Also limiting: Transparency. See the guide →

The night, hour by hour

Colour = score · Luminance = everything else
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
30
25
18
7
8
7
4
4
3
3
7
Score
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
Mid cloud
0%
9%
70%
56%
91%
100%
92%
98%
98%
100%
100%
78%
87%
High cloud
99%
95%
29%
98%
90%
0%
87%
98%
100%
100%
100%
100%
100%
Transparency
0.69
0.63
0.56
0.53
0.59
0.60
0.61
0.58
0.59
0.55
0.45
0.41
0.10
Seeing
0.86
0.83
0.81
0.77
0.73
0.72
0.71
0.73
0.74
0.70
0.64
0.61
0.63
Moon clear
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
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
20 Poor · 30/100
Starting from
100
Cloud
−56
Transparency
−7
Seeing
−2
Moonlight
−0
Darkness
−6
Score
30
CLOUD 95% LOW 0% MID 9% HIGH 95% SUN -16.0° MOON -16.9° / 0% WIND 4 TEMP 12°
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 77%
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 77%
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 77%
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 77%
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 77%

Deep-sky visual is your current default.

A darker option

Katahdin Woods and Waters

876 km away · Natural-dark sky · 21.8–21.9 mag/arcsec²

80conditions tonight
See the trade-off →
Latest verified night · 2026-10-08

Prediction, meet observation.

All comparisons →
9 matches0 discrepanciesSatellite saw 1.8 points less cloud.
GOES cloud mask · ~13h referenceThe cloud call matched every sampled dark hour.Cloud only · 9 astronomically dark hours

Recent cloud comparisons · 30 recorded nights →

The next week of nights

Tonight · 10 Oct
25
Poor

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

MOON 1%
Tomorrow · 11 Oct
0
Not worth it

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

MOON 3%
Monday · 12 Oct
67
Good
MOON 6%
20:00–03:00
Tuesday · 13 Oct
0
Not worth it

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

MOON 13%
Wednesday · 14 Oct
48
Fair
MOON 21%
20:00–21:00
Thursday · 15 Oct
53
Fair
MOON 29%
20:00–21:00
Friday · 16 Oct
2
Not worth it

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

MOON 37%

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
30
25
18
7
8
7
4
4
3
3
7
Score
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
Mid cloud
0%
9%
70%
56%
91%
100%
92%
98%
98%
100%
100%
78%
87%
High cloud
99%
95%
29%
98%
90%
0%
87%
98%
100%
100%
100%
100%
100%
Transparency
0.69
0.63
0.56
0.53
0.59
0.60
0.61
0.58
0.59
0.55
0.45
0.41
0.10
Seeing
0.86
0.83
0.81
0.77
0.73
0.72
0.71
0.73
0.74
0.70
0.64
0.61
0.63
Moon clear
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

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
Score
Low cloud
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
Mid cloud
16%
27%
2%
4%
17%
6%
33%
4%
2%
1%
0%
2%
2%
High cloud
2%
24%
52%
51%
33%
68%
29%
3%
6%
5%
0%
0%
0%
Transparency
0.13
0.13
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.13
0.13
0.13
Seeing
0.73
0.75
0.70
0.82
0.86
0.83
0.88
0.98
0.98
0.97
0.92
0.91
0.86
Moon clear
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

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
57
67
58
52
56
59
56
Score
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
0%
0%
0%
9%
18%
9%
3%
2%
40%
High cloud
64%
9%
0%
4%
2%
0%
0%
11%
98%
Transparency
0.27
0.24
0.22
0.19
0.16
0.14
0.13
0.13
0.14
Seeing
0.91
0.91
0.90
0.83
0.78
0.75
0.72
0.71
0.72
Moon clear
6%
down
down
down
down
down
down
down
down
19
20
21
22
23
00
01
02
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
Score
Low cloud
0%
100%
100%
98%
Mid cloud
50%
7%
2%
1%
High cloud
9%
1%
0%
0%
Transparency
0.73
0.44
0.28
0.19
Seeing
0.63
0.72
0.78
0.79
Moon clear
10%
down
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
48
1
Score
Low cloud
99%
25%
98%
98%
Mid cloud
7%
0%
0%
0%
High cloud
2%
2%
2%
4%
Transparency
0.64
0.37
0.31
0.44
Seeing
0.65
0.75
0.65
0.64
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
53
31
Score
Low cloud
23%
0%
0%
0%
Mid cloud
0%
0%
0%
0%
High cloud
75%
52%
100%
99%
Transparency
0.93
0.53
0.22
0.28
Seeing
0.80
0.94
1.00
0.93
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
1
2
Score
Low cloud
0%
97%
96%
96%
Mid cloud
0%
34%
4%
21%
High cloud
0%
0%
0%
0%
Transparency
1.00
0.32
0.38
0.34
Seeing
0.69
0.50
0.46
0.55
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 Cherry Springs State Park, Pennsylvania, 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.