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Bonny

4.452° N   7.171° E  ·  7 M
37 /100
PEAK
Marginal, but there is a 1 hour gap from 01:00.
BEST WINDOW 01:00–02:00 · ASTRO DARK 20:00–06:00 · MOON 0%
Transparency
0.29
Seeing
0.86
Cloud
50%
Moon
0%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
19
20
21
22
23
00
01
02
03
04
05
06
07
0
5
0
1
23
32
37
14
4
8
9
0
0
BEST WINDOW
Low cloud
60%
70%
98%
92%
28%
23%
35%
66%
84%
69%
63%
98%
100%
Mid cloud
40%
63%
100%
78%
13%
11%
3%
10%
29%
16%
16%
61%
100%
High cloud
68%
70%
81%
97%
83%
53%
21%
53%
91%
100%
100%
100%
97%
Transparency
0.28
0.29
0.29
0.27
0.24
0.23
0.22
0.10
0.10
0.18
0.18
0.10
0.10
Seeing
0.65
0.69
0.74
0.81
0.83
0.84
0.83
0.84
0.83
0.85
0.86
0.84
0.89
Moon clear
down
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
19 Clouded out · 0/100
Starting from
100
Cloud
−84
Transparency
−5
Seeing
−1
Moonlight
−0
Darkness
−10
Score
0
CLOUD 86% LOW 60% MID 40% HIGH 68% SUN -4.5° MOON -2.0° / 0% WIND 6 TEMP 25°
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 00:30 · OBSERVE 01:00–02:00 · 1H · MEAN 37

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

19212301030507
HIGH CLOUD CLEARS 01:00CLOUD RETURNS 02:00
SET UP 23:30 · OBSERVE 00:00–02:00 · 2H · MEAN 40

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

19212301030507
HIGH CLOUD CLEARS 00:00CLOUD RETURNS 02:00MOONLIGHT IGNORED FOR THIS TARGET
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

19212301030507
CLOUD NEVER DROPS BELOW 50%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

19212301030507
CLOUD NEVER DROPS BELOW 50%
SET UP 00:30 · OBSERVE 01:00–02:00 · 1H · MEAN 36

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

19212301030507
HIGH CLOUD CLEARS 01:00CLOUD RETURNS 02:00
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The next week of nights

Tonight · 12 Aug
37
Fair
MOON 0%
01:00–02:00
Tomorrow · 13 Aug
9
Clouded out
MOON 2%
Friday · 14 Aug
11
Clouded out
MOON 6%
Saturday · 15 Aug
9
Clouded out
MOON 13%
Sunday · 16 Aug
24
Poor
MOON 21%
Monday · 17 Aug
10
Clouded out
MOON 30%
Tuesday · 18 Aug
3
Clouded out
MOON 39%
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Nearby locations

About this forecast

Conditions for Bonny, Nigeria 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 →