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Las Margaritas

16.313° N   91.982° W  ·  1513 M
36 /100
PEAK
Marginal, but there is a 1 hour gap from 01:00.
BEST WINDOW 01:00–02:00 · ASTRO DARK 20:00–05:00 · MOON 1%
Transparency
0.31
Seeing
1.00
Cloud
53%
Moon
1%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
18
19
20
21
22
23
00
01
02
03
04
05
06
0
2
0
8
10
14
22
36
11
16
12
7
0
BEST WINDOW
Low cloud
48%
33%
100%
84%
75%
57%
59%
26%
20%
38%
72%
77%
95%
Mid cloud
14%
10%
23%
10%
15%
6%
15%
21%
80%
38%
16%
7%
0%
High cloud
34%
44%
48%
42%
61%
80%
11%
20%
59%
80%
49%
28%
29%
Transparency
0.41
0.10
0.26
0.27
0.26
0.21
0.25
0.22
0.26
0.31
0.28
0.28
0.26
Seeing
0.82
0.75
0.78
0.85
0.89
0.91
0.90
0.96
0.97
1.00
1.00
1.00
1.00
Moon clear
0%
down
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
18 Clouded out · 0/100
Starting from
100
Cloud
−63
Transparency
−9
Seeing
−1
Moonlight
−0
Darkness
−27
Score
0
CLOUD 69% LOW 48% MID 14% HIGH 34% SUN 7.2° MOON 11.7° / 0% WIND 4 TEMP 20°
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 00:30 · OBSERVE 01:00–02:00 · 1H · MEAN 35

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

18202200020406
CLOUD RETURNS 02:00
SET UP 00:30 · OBSERVE 01:00–02:00 · 1H · MEAN 44

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

18202200020406
CLOUD 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.

18202200020406
CLOUD NEVER DROPS BELOW 53%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

18202200020406
CLOUD NEVER DROPS BELOW 53%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

18202200020406
CLOUD NEVER DROPS BELOW 53%
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The next week of nights

Tonight · 12 Aug
36
Fair
MOON 0%
01:00–02:00
Tomorrow · 13 Aug
60
Good
MOON 3%
03:00–05:00
Friday · 14 Aug
25
Poor
MOON 7%
Saturday · 15 Aug
0
Clouded out
MOON 15%
Sunday · 16 Aug
31
Poor
MOON 23%
Monday · 17 Aug
11
Clouded out
MOON 32%
Tuesday · 18 Aug
8
Clouded out
MOON 42%
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Nearby locations

About this forecast

Conditions for Las Margaritas, Mexico 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 →