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Korogwe

-5.150° S   38.483° E  ·  309 M
71 /100
PEAK
Worth setting up — 10 hours of workable sky from 20:00.
BEST WINDOW 20:00–06:00 · ASTRO DARK 20:00–06:00 · MOON 0%
Transparency
0.51
Seeing
1.00
Cloud
9%
Moon
0%

Good tonight

Hour by hour, local to Korogwe. 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
07
37
39
50
60
66
71
71
53
57
58
8
0
BEST WINDOW
Low cloud
1%
1%
0%
0%
0%
0%
2%
25%
20%
20%
56%
61%
Mid cloud
1%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
High cloud
96%
91%
66%
41%
27%
13%
6%
9%
5%
0%
0%
0%
Transparency
0.51
0.47
0.46
0.44
0.44
0.42
0.39
0.35
0.33
0.32
0.32
0.31
Seeing
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
0.99
0.99
0.97
0.93
Moon clear
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
20 Fair · 37/100
Starting from
100
Cloud
−54
Transparency
−9
Seeing
−0
Moonlight
−0
Darkness
−0
Score
37
CLOUD 96% LOW 1% MID 1% HIGH 96% SUN -22.7° MOON -21.5° / 0% WIND 2 TEMP 21°
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 20:30 · OBSERVE 21:00–06:00 · 9H · MEAN 57

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

202200020406
CLOUD RETURNS 06:00
SET UP 19:30 · OBSERVE 20:00–06:00 · 10H · MEAN 65

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

202200020406
CLOUD RETURNS 06:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 21:30 · OBSERVE 22:00–06:00 · 8H · MEAN 54

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

202200020406
HIGH CLOUD CLEARS 22:00CLOUD RETURNS 06:00
SET UP 22:30 · OBSERVE 23:00–06:00 · 7H · MEAN 46

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

202200020406
HIGH CLOUD CLEARS 23:00CLOUD RETURNS 06:00
SET UP 21:30 · OBSERVE 22:00–06:00 · 8H · MEAN 60

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

202200020406
HIGH CLOUD CLEARS 22:00CLOUD RETURNS 06:00
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The next week of nights

Tonight · 12 Aug
71
Good
MOON 0%
20:00–06:00
Tomorrow · 13 Aug
79
Excellent
MOON 2%
20:00–06:00
Friday · 14 Aug
72
Good
MOON 6%
20:00–03:00
Saturday · 15 Aug
48
Fair
MOON 13%
21:00–22:00
Sunday · 16 Aug
15
Poor
MOON 21%
Monday · 17 Aug
56
Good
MOON 30%
03:00–04:00
Tuesday · 18 Aug
51
Fair
MOON 39%
03:00–04:00
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Nearby locations

About this forecast

Conditions for Korogwe, Tanzania 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 →