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Pīrgaaj

25.856° N   88.359° E  ·  49 M
39 /100
PEAK
Marginal, but there is a 1 hour gap from 04:00.
BEST WINDOW 04:00–05:00 · ASTRO DARK 23:00–05:00 · MOON 0%
Transparency
0.27
Seeing
1.00
Cloud
33%
Moon
0%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
23
00
01
02
03
04
05
06
30
35
31
30
31
39
13
0
BEST WINDOW
Low cloud
0%
0%
2%
5%
7%
6%
12%
11%
Mid cloud
7%
2%
3%
1%
2%
0%
2%
2%
High cloud
98%
91%
97%
99%
95%
74%
23%
91%
Transparency
0.27
0.27
0.26
0.26
0.26
0.26
0.25
0.26
Seeing
1.00
1.00
1.00
0.99
0.95
0.93
0.93
0.90
Moon clear
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
23 Poor · 30/100
Starting from
100
Cloud
−57
Transparency
−13
Seeing
−0
Moonlight
−0
Darkness
−0
Score
30
CLOUD 98% LOW 0% MID 7% HIGH 98% SUN -45.6° MOON -44.2° / 0% WIND 1 TEMP 29°
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 03:30 · OBSERVE 04:00–05:00 · 1H · MEAN 36

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

23010305
HIGH CLOUD CLEARS 04:00TWILIGHT BEGINS 05:00
SET UP 22:30 · OBSERVE 23:00–06:00 · 7H · MEAN 38

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

23010305
CLOUD RETURNS 06:00MOONLIGHT 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.

23010305
CONDITIONS STAY BELOW THE USABLE THRESHOLD
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

23010305
CONDITIONS STAY BELOW THE USABLE THRESHOLD
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

23010305
CONDITIONS STAY BELOW THE USABLE THRESHOLD
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The next week of nights

Tonight · 12 Aug
39
Fair
MOON 0%
04:00–05:00
Tomorrow · 13 Aug
33
Poor
MOON 2%
Friday · 14 Aug
27
Poor
MOON 6%
Saturday · 15 Aug
2
Clouded out
MOON 12%
Sunday · 16 Aug
16
Poor
MOON 19%
Monday · 17 Aug
19
Poor
MOON 28%
Tuesday · 18 Aug
6
Clouded out
MOON 37%
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Nearby locations

About this forecast

Conditions for Pīrgaaj, Bangladesh 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 →