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Latham

42.747° N   73.759° W  ·  110 M
51 /100
PEAK
Marginal, but there is a 6 hours gap from 23:00.
BEST WINDOW 23:00–05:00 · ASTRO DARK 22:00–05:00 · MOON 0%
Transparency
0.28
Seeing
1.00
Cloud
33%
Moon
0%

Fair tonight

Hour by hour, local to Latham. 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
8
25
40
39
47
37
51
42
15
0
BEST WINDOW
Low cloud
0%
0%
1%
0%
6%
1%
14%
11%
30%
32%
36%
Mid cloud
11%
41%
15%
14%
29%
20%
18%
5%
13%
12%
2%
High cloud
17%
87%
98%
53%
16%
33%
48%
23%
3%
2%
7%
Transparency
0.67
0.23
0.15
0.18
0.10
0.28
0.22
0.20
0.19
0.17
0.16
Seeing
1.00
1.00
0.87
0.90
0.90
1.00
1.00
1.00
1.00
1.00
1.00
Moon clear
0%
down
down
down
down
down
down
down
down
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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
−18
Transparency
−11
Seeing
−0
Moonlight
−0
Darkness
−71
Score
0
CLOUD 26% LOW 0% MID 11% HIGH 17% SUN -0.5° MOON 2.7° / 0% WIND 2 TEMP 24°
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 22:30 · OBSERVE 23:00–05:00 · 6H · MEAN 42

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

202200020406
HIGH CLOUD CLEARS 23:00TWILIGHT BEGINS 05:00
SET UP 22:30 · OBSERVE 23:00–06:00 · 7H · MEAN 50

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

202200020406
HIGH CLOUD CLEARS 23:00TWILIGHT BEGINS 06:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 41

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

202200020406
HIGH CLOUD CLEARS 03:00TWILIGHT BEGINS 05:00
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

202200020406
CONDITIONS STAY BELOW THE USABLE THRESHOLD
SET UP 22:30 · OBSERVE 23:00–02:00 · 3H · MEAN 41

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

202200020406
HIGH CLOUD CLEARS 23:00
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The next week of nights

Tonight · 12 Aug
51
Fair
MOON 0%
23:00–05:00
Tomorrow · 13 Aug
73
Good
MOON 3%
22:00–05:00
Friday · 14 Aug
81
Excellent
MOON 7%
22:00–03:00
Saturday · 15 Aug
58
Good
MOON 15%
02:00–03:00
Sunday · 16 Aug
2
Clouded out
MOON 23%
Monday · 17 Aug
0
Clouded out
MOON 32%
Tuesday · 18 Aug
38
Fair
MOON 42%
02:00–03:00
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Nearby locations

About this forecast

Conditions for Latham, 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 →