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Perunād

8.949° N   76.643° E  ·  30 M
49 /100
PEAK
Marginal, but there is a 3 hours gap from 22:30.
BEST WINDOW 22:30–01:30 · ASTRO DARK 22:30–05:30 · MOON 0%
Transparency
0.25
Seeing
0.90
Cloud
24%
Moon
0%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
22
23
00
01
02
03
04
05
06
40
38
49
0
25
0
19
6
0
BEST WINDOW
Low cloud
18%
21%
13%
98%
23%
99%
46%
64%
100%
Mid cloud
7%
12%
5%
42%
27%
29%
7%
5%
6%
High cloud
28%
38%
9%
38%
52%
83%
77%
75%
95%
Transparency
0.10
0.25
0.10
0.10
0.10
0.22
0.23
0.23
0.10
Seeing
0.84
0.90
0.89
0.75
0.74
0.65
0.75
0.73
0.85
Moon clear
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
22 Fair · 40/100
Starting from
100
Cloud
−35
Transparency
−23
Seeing
−2
Moonlight
−0
Darkness
−0
Score
40
CLOUD 42% LOW 18% MID 7% HIGH 28% SUN -52.1° MOON -50.5° / 0% WIND 4 TEMP 26°
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
Why thin high cloud ruins long exposures

Cirrus you can barely see will halo your bright stars, lift your background and vary between frames. Visual observers shrug it off. Long exposures integrate it, so it accumulates.

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 22:00 · OBSERVE 22:30–01:30 · 3H · MEAN 42

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

2200020406
CLOUD RETURNS 01:30
SET UP 22:00 · OBSERVE 22:30–01:30 · 3H · MEAN 52

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

2200020406
CLOUD RETURNS 01:30MOONLIGHT IGNORED FOR THIS TARGET
SET UP 00:00 · OBSERVE 00:30–01:30 · 1H · MEAN 45

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

2200020406
HIGH CLOUD CLEARS 00:30CLOUD RETURNS 01:30
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

2200020406
CONDITIONS STAY BELOW THE USABLE THRESHOLD
SET UP 22:00 · OBSERVE 22:30–01:30 · 3H · MEAN 42

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

2200020406
CLOUD RETURNS 01:30
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The next week of nights

Tonight · 12 Aug
49
Fair
MOON 0%
22:30–01:30
Tomorrow · 13 Aug
14
Clouded out
MOON 2%
Friday · 14 Aug
42
Fair
MOON 6%
20:30–21:30
Saturday · 15 Aug
2
Clouded out
MOON 13%
Sunday · 16 Aug
52
Fair
MOON 21%
23:30–00:30
Monday · 17 Aug
20
Poor
MOON 30%
Tuesday · 18 Aug
56
Good
MOON 39%
23:30–00:30
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Nearby locations

About this forecast

Conditions for Perunād, India 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 →