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Trenčín

48.895° N   18.044° E  ·  284 M
90 /100
PEAK
A genuinely good night — 5 hours of clear, dark sky from 23:00.
BEST WINDOW 23:00–04:00 · ASTRO DARK 23:00–04:00 · MOON 0%
Transparency
0.93
Seeing
0.96
Cloud
0%
Moon
0%

Excellent tonight

Hour by hour, local to Trenčín. 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
16
72
90
89
87
86
85
57
2
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
High cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Transparency
1.00
0.93
0.87
0.84
0.80
0.76
0.71
0.67
0.65
0.63
0.62
Seeing
0.79
0.78
0.82
0.85
0.85
0.87
0.88
0.92
0.95
0.96
0.95
Moon clear
0%
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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
−0
Transparency
−0
Seeing
−5
Moonlight
−0
Darkness
−95
Score
0
CLOUD 0% LOW 0% MID 0% HIGH 0% SUN 0.7° MOON 2.6° / 0% WIND 4 TEMP 21°
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 21:30 · OBSERVE 22:00–05:00 · 7H · MEAN 80

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

202200020406
TWILIGHT BEGINS 05:00
SET UP 20:30 · OBSERVE 21:00–05:00 · 8H · MEAN 84

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

202200020406
TWILIGHT BEGINS 05:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 21:30 · OBSERVE 22:00–05:00 · 7H · MEAN 80

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

202200020406
TWILIGHT BEGINS 05:00
SET UP 21:30 · OBSERVE 22:00–05:00 · 7H · MEAN 76

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

202200020406
TWILIGHT BEGINS 05:00
SET UP 21:30 · OBSERVE 22:00–05:00 · 7H · MEAN 83

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

202200020406
TWILIGHT BEGINS 05:00
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The next week of nights

Tonight · 12 Aug
90
Excellent
MOON 0%
23:00–04:00
Tomorrow · 13 Aug
92
Excellent
MOON 2%
23:00–04:00
Friday · 14 Aug
92
Excellent
MOON 6%
23:00–04:00
Saturday · 15 Aug
95
Excellent
MOON 13%
02:00–03:00
Sunday · 16 Aug
96
Excellent
MOON 21%
02:00–03:00
Monday · 17 Aug
25
Poor
MOON 30%
Tuesday · 18 Aug
66
Good
MOON 39%
02:00–03:00
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Nearby locations

About this forecast

Conditions for Trenčín, Slovakia 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 →