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Venustiano Carranza

16.338° N   92.563° W  ·  775 M
67 /100
PEAK
Worth setting up — 9 hours of workable sky from 20:00.
BEST WINDOW 20:00–05:00 · ASTRO DARK 20:00–05:00 · MOON 1%
Transparency
0.30
Seeing
1.00
Cloud
9%
Moon
1%

Good tonight

Hour by hour, local to Venustiano Carranza. 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
0
38
48
57
62
67
60
42
48
47
28
0
BEST WINDOW
Low cloud
3%
0%
0%
5%
2%
2%
1%
1%
2%
2%
7%
10%
14%
Mid cloud
27%
5%
18%
15%
12%
1%
0%
0%
0%
0%
0%
0%
0%
High cloud
94%
82%
61%
27%
12%
16%
9%
29%
73%
57%
53%
48%
38%
Transparency
0.10
0.10
0.20
0.22
0.24
0.26
0.28
0.30
0.30
0.30
0.28
0.26
0.25
Seeing
0.92
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
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
−64
Transparency
−13
Seeing
−0
Moonlight
−0
Darkness
−22
Score
0
CLOUD 95% LOW 3% MID 27% HIGH 94% SUN 7.8° MOON 12.3° / 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 19:30 · OBSERVE 20:00–05:00 · 9H · MEAN 51

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

18202200020406
HIGH CLOUD CLEARS 20:00TWILIGHT BEGINS 05:00
SET UP 19:30 · OBSERVE 20:00–06:00 · 10H · MEAN 62

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

18202200020406
HIGH CLOUD CLEARS 20:00TWILIGHT BEGINS 06:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 20:30 · OBSERVE 21:00–02:00 · 5H · MEAN 52

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

18202200020406
HIGH CLOUD CLEARS 21:00CLOUD RETURNS 02:00
SET UP 21:30 · OBSERVE 22:00–02:00 · 4H · MEAN 45

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

18202200020406
HIGH CLOUD CLEARS 22:00CLOUD RETURNS 02:00
SET UP 20:30 · OBSERVE 21:00–05:00 · 8H · MEAN 53

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

18202200020406
HIGH CLOUD CLEARS 21:00TWILIGHT BEGINS 05:00
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The next week of nights

Tonight · 12 Aug
67
Good
MOON 0%
20:00–05:00
Tomorrow · 13 Aug
84
Excellent
MOON 3%
20:00–05:00
Friday · 14 Aug
71
Good
MOON 7%
20:00–01:00
Saturday · 15 Aug
21
Poor
MOON 15%
Sunday · 16 Aug
41
Fair
MOON 23%
00:00–01:00
Monday · 17 Aug
83
Excellent
MOON 32%
00:00–01:00
Tuesday · 18 Aug
31
Poor
MOON 42%
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Nearby locations

About this forecast

Conditions for Venustiano Carranza, 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 →