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Lexington

37.989° N   84.478° W  ·  298 M
45 /100
PEAK
Marginal, but there is a 2 hours gap from 02:00.
BEST WINDOW 02:00–04:00 · ASTRO DARK 23:00–06:00 · MOON 0%
Transparency
0.22
Seeing
1.00
Cloud
49%
Moon
0%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
21
22
23
00
01
02
03
04
05
06
07
0
25
40
40
31
45
36
25
30
10
0
BEST WINDOW
Low cloud
1%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
1%
2%
9%
0%
3%
8%
0%
21%
4%
0%
0%
High cloud
100%
97%
59%
69%
92%
45%
81%
98%
97%
100%
97%
Transparency
0.10
0.22
0.18
0.19
0.19
0.19
0.20
0.21
0.22
0.20
0.19
Seeing
0.89
1.00
0.84
0.79
0.83
0.82
0.81
0.88
0.92
1.00
0.92
Moon clear
down
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
21 Clouded out · 0/100
Starting from
100
Cloud
−56
Transparency
−16
Seeing
−1
Moonlight
−0
Darkness
−28
Score
0
CLOUD 100% LOW 1% MID 1% HIGH 100% SUN -5.3° MOON -1.2° / 0% WIND 3 TEMP 25°
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 23:00–01:00 · 2H · MEAN 39

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

212301030507
HIGH CLOUD CLEARS 23:00CLOUD RETURNS 01:00
SET UP 21:30 · OBSERVE 22:00–04:00 · 6H · MEAN 42

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

212301030507
CLOUD RETURNS 04:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 01:30 · OBSERVE 02:00–03:00 · 1H · MEAN 37

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

212301030507
HIGH CLOUD CLEARS 02:00CLOUD RETURNS 03:00
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

212301030507
CLOUD NEVER DROPS BELOW 49%
SET UP 22:30 · OBSERVE 23:00–01:00 · 2H · MEAN 38

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

212301030507
HIGH CLOUD CLEARS 23:00CLOUD RETURNS 01:00
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The next week of nights

Tonight · 12 Aug
45
Fair
MOON 0%
02:00–04:00
Tomorrow · 13 Aug
62
Good
MOON 3%
00:00–05:00
Friday · 14 Aug
81
Excellent
MOON 7%
22:00–03:00
Saturday · 15 Aug
16
Poor
MOON 15%
Sunday · 16 Aug
89
Excellent
MOON 23%
02:00–03:00
Monday · 17 Aug
47
Fair
MOON 32%
02:00–03:00
Tuesday · 18 Aug
77
Excellent
MOON 42%
02:00–03:00
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Nearby locations

About this forecast

Conditions for Lexington, Kentucky, 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 →