GoodSeeing
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Tonekābon

36.816° N   50.874° E
63 /100
PEAK
Worth setting up — 6 hours of workable sky from 20:30.
BEST WINDOW 20:30–02:30 · ASTRO DARK 21:30–04:30 · MOON 0%
Transparency
0.47
Seeing
0.93
Cloud
15%
Moon
0%

Good tonight

Hour by hour, local to Tonekābon. 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
56
63
61
50
46
38
32
12
9
0
BEST WINDOW
Low cloud
14%
9%
8%
13%
22%
27%
27%
56%
43%
25%
Mid cloud
1%
6%
9%
15%
5%
6%
20%
39%
20%
23%
High cloud
0%
1%
3%
6%
4%
5%
5%
37%
19%
51%
Transparency
0.44
0.41
0.47
0.44
0.44
0.43
0.39
0.15
0.17
0.17
Seeing
0.88
0.90
0.90
0.90
0.92
0.93
0.90
0.84
0.84
0.82
Moon clear
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
20 Good · 56/100
Starting from
100
Cloud
−15
Transparency
−19
Seeing
−2
Moonlight
−0
Darkness
−8
Score
56
CLOUD 15% LOW 14% MID 1% HIGH 0% SUN -16.5° MOON -15.0° / 0% WIND 3 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
Conditions for planets and the Moon

Seeing is everything. Darkness and moonlight barely matter, and a hazy, humid night that ruins deep-sky work is often the steadiest night of the year for planetary detail.

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 20:00 · OBSERVE 20:30–02:30 · 6H · MEAN 52

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

2022000204
SET UP 20:00 · OBSERVE 20:30–03:30 · 7H · MEAN 57

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

2022000204
CLOUD RETURNS 03:30MOONLIGHT IGNORED FOR THIS TARGET
SET UP 20:00 · OBSERVE 20:30–02:30 · 6H · MEAN 50

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

2022000204
SET UP 20:00 · OBSERVE 20:30–00:30 · 4H · MEAN 45

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

2022000204
SET UP 20:00 · OBSERVE 20:30–02:30 · 6H · MEAN 52

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

2022000204
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The next week of nights

Tonight · 12 Aug
63
Good
MOON 0%
20:30–02:30
Tomorrow · 13 Aug
49
Fair
MOON 2%
03:30–04:30
Friday · 14 Aug
10
Clouded out
MOON 6%
Saturday · 15 Aug
23
Poor
MOON 13%
Sunday · 16 Aug
28
Poor
MOON 21%
Monday · 17 Aug
61
Good
MOON 30%
03:30–04:30
Tuesday · 18 Aug
78
Excellent
MOON 39%
03:30–04:30
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Nearby locations

About this forecast

Conditions for Tonekābon, Iran 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 →