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Biharamulo

-2.632° S   31.309° E  ·  1479 M
87 /100
PEAK
A genuinely good night — 9 hours of clear, dark sky from 21:00.
BEST WINDOW 21:00–06:00 · ASTRO DARK 21:00–06:00 · MOON 0%
Transparency
1.00
Seeing
1.00
Cloud
2%
Moon
0%

Excellent tonight

Hour by hour, local to Biharamulo. 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
48
53
47
42
44
40
52
60
76
87
70
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
3%
2%
2%
1%
1%
0%
0%
0%
0%
0%
0%
0%
High cloud
56%
73%
84%
91%
89%
98%
73%
54%
17%
5%
2%
0%
Transparency
0.92
0.82
0.74
0.70
0.68
0.68
0.70
0.70
0.73
0.92
1.00
1.00
Seeing
0.90
0.90
0.90
0.89
0.96
0.97
1.00
0.90
0.79
0.69
0.67
0.70
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 · 48/100
Starting from
100
Cloud
−32
Transparency
−2
Seeing
−2
Moonlight
−0
Darkness
−15
Score
48
CLOUD 57% LOW 0% MID 3% HIGH 56% SUN -15.1° MOON -14.0° / 0% WIND 3 TEMP 24°
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 19:30 · OBSERVE 20:00–07:00 · 11H · MEAN 54

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

202200020406
TWILIGHT BEGINS 07:00
SET UP 19:30 · OBSERVE 20:00–07:00 · 11H · MEAN 57

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

202200020406
TWILIGHT BEGINS 07:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 01:30 · OBSERVE 02:00–07:00 · 5H · MEAN 65

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

202200020406
HIGH CLOUD CLEARS 02:00TWILIGHT BEGINS 07:00
SET UP 02:30 · OBSERVE 03:00–07:00 · 4H · MEAN 65

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

202200020406
HIGH CLOUD CLEARS 03:00TWILIGHT BEGINS 07:00
SET UP 01:30 · OBSERVE 02:00–07:00 · 5H · MEAN 68

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

202200020406
HIGH CLOUD CLEARS 02:00TWILIGHT BEGINS 07:00
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The next week of nights

Tonight · 12 Aug
87
Excellent
MOON 0%
21:00–06:00
Tomorrow · 13 Aug
95
Excellent
MOON 2%
21:00–06:00
Friday · 14 Aug
99
Excellent
MOON 6%
21:00–06:00
Saturday · 15 Aug
97
Excellent
MOON 13%
21:00–22:00
Sunday · 16 Aug
80
Excellent
MOON 21%
03:00–04:00
Monday · 17 Aug
80
Excellent
MOON 30%
21:00–22:00
Tuesday · 18 Aug
68
Good
MOON 39%
21:00–22:00
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Nearby locations

About this forecast

Conditions for Biharamulo, 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 →