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Pilón

19.905° N 77.322° W · 12 M

49 /100
PEAK

Marginal, but there is a 3 hours gap from 02:00.

BEST WINDOW 02:00–05:00 · ASTRO DARK 21:00–06:00 · MOON 0%

Transparency

0.35

Seeing

0.85

Cloud

18%

Moon

Fair tonight

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

Sky state

Lighter = daylight and twilight · unshaded = astronomical dark

Score

BEST WINDOW

Low cloud

25%

22%

27%

34%

30%

16%

30%

17%

60%

28%

41%

Mid cloud

25%

27%

11%

38%

12%

High cloud

Transparency

0.44

0.11

0.35

0.33

0.10

0.24

0.23

0.22

0.20

0.19

Seeing

0.45

0.50

0.46

0.48

0.59

0.67

0.74

0.85

0.89

Moon clear

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

−30

Transparency

−16

Seeing

−7

Moonlight

−0

Darkness

−47

Score

CLOUD 34% LOW 5% MID 25% HIGH 9% SUN -5.2° MOON -0.4° / 0% WIND 8 TEMP 29°

Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.

Tonight's limiting factor

What the GoodSeeing score actually measures

One number from 0 to 100 per hour, combining cloud, transparency, seeing, moonlight and darkness. Cloud gates everything else — no amount of steady, dark air rescues an overcast sky.

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.

Deep-sky visualPlanetary & lunarWide-field imagingLong exposureMeteor watching

SET UP 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 49

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

202200020406

CLOUD BREAKS 02:00CLOUD RETURNS 05:00

SET UP 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 51

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

202200020406

CLOUD BREAKS 02:00CLOUD RETURNS 05:00MOONLIGHT IGNORED FOR THIS TARGET

SET UP 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 46

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

202200020406

CLOUD BREAKS 02:00CLOUD RETURNS 05:00

SET UP 03:30 · OBSERVE 04:00–05:00 · 1H · MEAN 37

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

202200020406

CLOUD RETURNS 05:00

SET UP 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 52

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

202200020406

CLOUD BREAKS 02:00CLOUD RETURNS 05:00

The next week of nights

Tonight · 12 Aug

Fair

MOON 0%
02:00–05:00

Tomorrow · 13 Aug

Good

MOON 3%
04:00–06:00

Friday · 14 Aug

Good

MOON 7%
02:00–03:00

Saturday · 15 Aug

Fair

MOON 15%
02:00–03:00

Sunday · 16 Aug

Good

MOON 23%
02:00–03:00

Monday · 17 Aug

Poor

MOON 32%

Tuesday · 18 Aug

Good

MOON 42%
02:00–03:00

Nearby locations

About this forecast

Conditions for Pilón, Cuba 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 →