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Los Gatos

37.227° N   121.975° W  ·  102 M
30 /100
PEAK
Nothing usable opens up tonight.
NO USABLE WINDOW · ASTRO DARK 22:00–05:00 · MOON 1%
Transparency
0.35
Seeing
0.97
Cloud
48%
Moon
1%

Poor tonight

Hour by hour, local to Los Gatos. 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
0
17
30
15
10
5
4
4
7
5
0
Low cloud
16%
42%
56%
66%
71%
82%
84%
84%
82%
84%
94%
Mid cloud
0%
0%
2%
2%
0%
0%
2%
1%
0%
0%
0%
High cloud
2%
9%
3%
0%
2%
13%
34%
31%
0%
0%
0%
Transparency
0.46
0.35
0.31
0.28
0.26
0.24
0.24
0.25
0.25
0.25
0.25
Seeing
0.94
0.96
0.96
0.95
0.96
0.97
0.97
0.94
0.91
0.90
0.91
Moon clear
0%
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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 Clouded out · 0/100
Starting from
100
Cloud
−17
Transparency
−18
Seeing
−1
Moonlight
−0
Darkness
−64
Score
0
CLOUD 19% LOW 16% MID 0% HIGH 2% SUN -0.1° MOON 4.2° / 0% WIND 3 TEMP 18°
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.

NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

202200020406
CONDITIONS STAY BELOW THE USABLE THRESHOLD
SET UP 20:30 · OBSERVE 21:00–23:00 · 2H · MEAN 37

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

202200020406
MOONLIGHT 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.

202200020406
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.

202200020406
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.

202200020406
CONDITIONS STAY BELOW THE USABLE THRESHOLD
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The next week of nights

Tonight · 12 Aug
30
Poor
MOON 1%
Tomorrow · 13 Aug
42
Fair
MOON 3%
22:00–23:00
Friday · 14 Aug
58
Good
MOON 7%
22:00–00:00
Saturday · 15 Aug
69
Good
MOON 17%
23:00–00:00
Sunday · 16 Aug
33
Poor
MOON 25%
Monday · 17 Aug
38
Fair
MOON 35%
05:00–06:00
Tuesday · 18 Aug
51
Fair
MOON 44%
23:00–00:00
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Nearby locations

About this forecast

Conditions for Los Gatos, California, United States 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 →