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Clay

43.186° N   76.172° W  ·  122 M
41 /100
PEAK
Marginal, but there is a 1 hour gap from 00:00.
BEST WINDOW 00:00–01:00 · ASTRO DARK 23:00–05:00 · MOON 0%
Transparency
0.18
Seeing
1.00
Cloud
50%
Moon
0%

Fair tonight

Hour by hour, local to Clay. Colour encodes the score and nothing else; every other measurement is luminance.

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
20
21
22
23
00
01
02
03
04
05
06
0
6
23
18
41
29
0
5
1
0
0
BEST WINDOW
Low cloud
9%
13%
45%
57%
20%
36%
100%
92%
98%
100%
100%
Mid cloud
21%
34%
9%
22%
6%
4%
2%
2%
2%
2%
5%
High cloud
92%
52%
46%
30%
35%
47%
8%
5%
2%
9%
52%
Transparency
0.10
0.10
0.10
0.10
0.18
0.10
0.10
0.18
0.17
0.18
0.18
Seeing
1.00
1.00
1.00
0.93
0.99
1.00
1.00
0.99
0.99
0.96
0.96
Moon clear
0%
down
down
down
down
down
down
down
down
down
down
Inspect

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

Why this hour scored what it did
20 Clouded out · 0/100
Starting from
100
Cloud
−64
Transparency
−13
Seeing
−0
Moonlight
−0
Darkness
−23
Score
0
CLOUD 95% LOW 9% MID 21% HIGH 92% SUN 1.3° MOON 4.5° / 0% WIND 2 TEMP 21°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.

What are you doing tonight?

The same forecast, weighted for the target. Planetary work barely cares about moonlight; long exposures die on high cloud a visual observer would never notice.

SET UP 23:30 · OBSERVE 00:00–01:00 · 1H · MEAN 40

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

202200020406
CLOUD BREAKS 00:00CLOUD RETURNS 01:00
SET UP 23:30 · OBSERVE 00:00–02:00 · 2H · MEAN 44

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

202200020406
CLOUD BREAKS 00:00CLOUD RETURNS 02:00MOONLIGHT 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.

202200020406
CLOUD NEVER DROPS BELOW 50%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

202200020406
CLOUD NEVER DROPS BELOW 50%
SET UP 23:30 · OBSERVE 00:00–01:00 · 1H · MEAN 39

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

202200020406
CLOUD BREAKS 00:00CLOUD RETURNS 01:00
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The next week of nights

Tonight · 12 Aug
41
Fair
MOON 0%
00:00–01:00
Tomorrow · 13 Aug
69
Good
MOON 3%
01:00–05:00
Friday · 14 Aug
67
Good
MOON 7%
22:00–03:00
Saturday · 15 Aug
69
Good
MOON 15%
02:00–03:00
Sunday · 16 Aug
0
Clouded out
MOON 23%
Monday · 17 Aug
67
Good
MOON 32%
02:00–03:00
Tuesday · 18 Aug
70
Good
MOON 42%
02:00–03:00
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Nearby locations

About this forecast

Conditions for Clay, New York, 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 how dark the sky actually gets. Read the full method →