Amigo Too
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Amigo Too clear sky chart from 2005-11-06 to 2026-08-30.

This page is a summary of past forecasts. Even though it's based only on forecasts, some people use these pages as clue to a site's climate. But climate data based on actual observation should be preferred (if you can find it!).

Cloud, Transparency and Seeing forecasts are summarized individually. But because good observing conditions require a combination of minimum cloud cover, transparency and seeing, the individual forecast summaries can be difficult to interpret. The observing conditions section counts the combinations of conditions needed for common types of astronomical observation.

Observing Conditions

The following tables count the occurrence of the combinations of forecast and darkness conditions needed for different observations. Conditions are rated by by what percentage of the hours the observation would likely be attempted are usable.

Observation Type	Minimum conditions for hour to be usable				Out of hours
	Clear of Clouds	Transparency	Seeing	Sky Brightness
Planetary:	50%	(no limit)	Average	(no limit)	Nighttime Hours
Deep Sky:	70%	Average	(no limit)	5.9	Nighttime Hours
CCD Imaging:	70%	Below Average	Poor	(no limit)	Nighttime Hours

Percentages are of nighttime hours per month, or per year, when a particular observing conditions was met. Deep Sky percentages never exceed 50% because the moon is up half the time. Deep sky percentages are much lower for charts at high latitudes because of fewer dark hours in the summer.

Overall

By Month

Individual Forecasts

The length of each colored bar in the "occurrence of each Forecast" column is proportional to the number of times the chart forecast that color. The percentages are of the total number of hours per month, or per year, with a particular forecast. The colors as the same as those used in clear sky charts.

Note: Transparency probabilities are only counted for those hours that have 30% or less cloud cover. Seeing probabilities are only counted for those hours that have 80% or less cloud cover. If that's too tricky, try Observing Conditions instead.

Overall

		Occurrence of each Forecast	Data Points
Cloud Cover	Day	3 4 1 4 3 4 4 4 6% 8% 61%	151418
	Night	3 4 1 4 3 3 4 3 5% 8% 63%	148329
Transparency	Day	20% 6% 8% 18% 28% 21%	146480
	Night	19% 5% 7% 18% 30% 21%	144277
Seeing	Day	8% 14% 27% 28% 17% 6%	17438
	Night	5% 13% 31% 32% 16% 2	27499

By Month

Percentage Cloud Cover SW (2006-)
Color Meanings: Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	1 5% 2 5% 3 4 4 3 5% 6% 62%	5318
	11th to 20th	Day	1 2 1 2 2 2 2 2 3 4 78%	5340
	21st to end	Day	3 5% 2 6% 3 3 3 3 6% 6% 61%	5844
February	1st to 10th	Day	1 4 1 3 3 3 3 3 5% 7% 68%	2012
	11th to 20th	Day	2 5% 2 4 3 3 3 3 5% 7% 65%	2049
	21st to end	Day	1 3 1 3 2 3 2 3 4 6% 72%	1730
March	1st to 10th	Day	1 4 2 4 2 2 3 3 5% 7% 66%	4778
	11th to 20th	Day	3 10% 1 3 2 3 3 3 4 6% 63%	5110
	21st to end	Day	1 3 2 4 3 3 4 4 6% 8% 63%	5845
April	1st to 10th	Day	2 3 1 3 3 3 4 3 5% 6% 68%	2520
	11th to 20th	Day	2 3 1 4 3 3 3 3 4 7% 68%	2491
	21st to end	Day	2 3 1 2 1 2 2 2 4 7% 74%	2520
May	1st to 10th	Day	3 5% 1 3 3 3 4 4 5% 8% 63%	7057
	11th to 20th	Day	3 3 1 3 2 2 3 3 4 6% 71%	7050
	21st to end	Day	1 2 1 3 3 3 4 3 6% 7% 66%	8851
June	1st to 10th	Day	1 3 1 3 3 3 5% 4 7% 9% 60%	2940
	11th to 20th	Day	2 2 1 3 3 3 4 3 5% 6% 69%	2940
	21st to end	Day	6% 4 1 4 4 4 4 5% 6% 9% 52%	2940
July	1st to 10th	Day	4 4 1 5% 5% 5% 6% 5% 7% 9% 47%	7977
	11th to 20th	Day	2 3 1 5% 4 6% 6% 6% 9% 12% 47%	7650
	21st to end	Day	5% 4 2 6% 6% 7% 7% 6% 9% 11% 37%	8304
August	1st to 10th	Day	3 3 1 5% 4 5% 6% 5% 8% 10% 49%	5544
	11th to 20th	Day	3 3 1 6% 5% 6% 6% 5% 8% 10% 46%	5486
	21st to end	Day	4 3 1 5% 5% 6% 6% 5% 9% 11% 44%	6093
September	1st to 10th	Day	7% 5% 2 6% 4 5% 5% 4 6% 7% 50%	2400
	11th to 20th	Day	8% 4 1 5% 3 4 5% 4 6% 7% 53%	2394
	21st to end	Day	4 3 1 4 3 3 2 2 4 6% 68%	2200
October	1st to 10th	Day	4 3 1 3 2 2 2 2 3 5% 73%	3282
	11th to 20th	Day	4 5% 1 4 2 3 3 3 4 6% 64%	3250
	21st to end	Day	2 2 1 2 1 1 1 1 2 4 83%	3548
November	1st to 10th	Day	3 3 1 2 1 2 2 2 4 6% 73%	2006
	11th to 20th	Day	1 3 1 4 2 3 2 3 3 6% 72%	1890
	21st to end	Day	3 4 1 4 2 2 3 3 5% 6% 66%	1890
December	1st to 10th	Day	1 3 1 3 2 2 2 2 4 6% 74%	2971
	11th to 20th	Day	1 4 2 4 2 2 3 2 5% 6% 67%	3106
	21st to end	Day	1 2 1 3 2 2 3 2 3 7% 74%	4092
January	1st to 10th	Night	2 5% 2 6% 4 3 4 3 5% 7% 60%	7645
	11th to 20th	Night	1 2 1 2 2 2 2 2 3 4 80%	7650
	21st to end	Night	3 5% 1 4 3 3 4 4 6% 7% 61%	8370
February	1st to 10th	Night	1 3 1 3 2 2 2 2 5% 8% 70%	2604
	11th to 20th	Night	3 4 2 4 3 2 3 3 4 6% 66%	2458
	21st to end	Night	1 3 2 2 2 2 2 3 5% 8% 71%	2076
March	1st to 10th	Night	1 3 1 3 2 2 3 2 5% 6% 71%	5319
	11th to 20th	Night	5% 9% 2 2 1 2 2 2 3 6% 66%	5110
	21st to end	Night	1 2 1 2 2 2 3 3 5% 7% 74%	5358
April	1st to 10th	Night	2 3 1 3 2 3 3 3 5% 7% 70%	2100
	11th to 20th	Night	3 3 1 4 2 3 3 3 4 6% 70%	2077
	21st to end	Night	3 2 1 3 2 2 4 3 5% 7% 70%	2100
May	1st to 10th	Night	4 5% 2 5% 3 3 3 3 5% 6% 61%	5890
	11th to 20th	Night	2 3 1 3 2 3 3 3 4 6% 71%	5825
	21st to end	Night	3 3 1 4 3 2 3 3 5% 6% 67%	5351
June	1st to 10th	Night	3 4 2 5% 4 5% 4 4 7% 8% 54%	1680
	11th to 20th	Night	2 2 1 3 4 4 4 4 6% 6% 64%	1680
	21st to end	Night	5% 3 2 5% 5% 4 5% 6% 8% 9% 48%	1680
July	1st to 10th	Night	4 6% 2 5% 5% 4 5% 4 7% 10% 47%	4979
	11th to 20th	Night	3 3 2 6% 5% 5% 6% 5% 9% 12% 45%	5340
	21st to end	Night	6% 5% 2 6% 4 5% 6% 6% 9% 14% 38%	5805
August	1st to 10th	Night	3 3 2 5% 4 5% 6% 6% 10% 12% 43%	4475
	11th to 20th	Night	3 4 2 4 4 5% 6% 5% 9% 12% 46%	4583
	21st to end	Night	4 4 2 6% 4 5% 6% 6% 10% 13% 40%	5083
September	1st to 10th	Night	7% 5% 1 5% 4 4 6% 4 7% 9% 48%	2000
	11th to 20th	Night	6% 5% 1 4 3 3 4 3 4 7% 59%	2005
	21st to end	Night	4 3 1 4 2 2 3 3 4 7% 67%	2200
October	1st to 10th	Night	4 3 1 3 2 2 2 2 4 4 74%	3903
	11th to 20th	Night	4 3 1 3 2 3 3 2 4 6% 69%	3898
	21st to end	Night	2 2 1 2 1 1 1 2 4 5% 79%	4252
November	1st to 10th	Night	3 3 1 2 1 2 3 2 4 7% 73%	2489
	11th to 20th	Night	1 3 1 3 2 2 2 2 4 7% 72%	2730
	21st to end	Night	3 5% 1 3 3 2 2 3 5% 6% 66%	2730
December	1st to 10th	Night	2 3 1 3 3 2 3 2 3 6% 71%	4435
	11th to 20th	Night	1 2 1 3 3 3 3 3 5% 7% 69%	5321
	21st to end	Night	1 3 1 4 3 2 3 2 4 7% 70%	7128

Transparency (when cloud cover <= 30%)
Color Meanings: Too cloudy to forecast Poor Below Average Average Above average Transparent
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	24% 5% 4 18% 41% 9%	5321
	11th to 20th	Day	11% 3 5% 17% 36% 27%	5340
	21st to end	Day	24% 5% 3 11% 33% 25%	5844
February	1st to 10th	Day	17% 4 6% 18% 31% 25%	2012
	11th to 20th	Day	20% 4 5% 19% 32% 20%	2059
	21st to end	Day	14% 4 3 13% 36% 30%	1730
March	1st to 10th	Day	17% 5% 3 9% 33% 34%	4778
	11th to 20th	Day	22% 4 3 14% 29% 27%	5110
	21st to end	Day	18% 5% 5% 18% 37% 18%	5845
April	1st to 10th	Day	17% 4 4 15% 37% 23%	2520
	11th to 20th	Day	17% 4 4 15% 29% 30%	2494
	21st to end	Day	12% 3 4 19% 39% 23%	2520
May	1st to 10th	Day	19% 4 8% 18% 28% 22%	7057
	11th to 20th	Day	15% 3 5% 13% 31% 33%	7053
	21st to end	Day	16% 5% 6% 13% 17% 42%	8852
June	1st to 10th	Day	18% 6% 11% 20% 23% 22%	2940
	11th to 20th	Day	15% 4 4 14% 23% 40%	2940
	21st to end	Day	27% 7% 9% 19% 20% 19%	2940
July	1st to 10th	Day	28% 9% 11% 16% 20% 15%	7913
	11th to 20th	Day	23% 11% 19% 26% 17% 5%	7581
	21st to end	Day	32% 12% 18% 23% 13% 2	8120
August	1st to 10th	Day	25% 8% 13% 29% 20% 5%	4062
	11th to 20th	Day	26% 9% 12% 23% 23% 7%	4002
	21st to end	Day	31% 9% 16% 26% 15% 3	4420
September	1st to 10th	Day	30% 7% 11% 19% 22% 10%	2400
	11th to 20th	Day	28% 7% 7% 17% 26% 14%	2394
	21st to end	Day	19% 4 6% 22% 32% 18%	2200
October	1st to 10th	Day	15% 4 4 13% 32% 31%	3282
	11th to 20th	Day	22% 4 6% 15% 29% 24%	3250
	21st to end	Day	9% 2 2 14% 40% 32%	3548
November	1st to 10th	Day	14% 3 3 18% 40% 23%	2006
	11th to 20th	Day	15% 3 4 22% 36% 20%	1890
	21st to end	Day	20% 4 4 20% 33% 20%	1890
December	1st to 10th	Day	14% 3 4 25% 35% 19%	2971
	11th to 20th	Day	17% 5% 5% 18% 38% 17%	3104
	21st to end	Day	12% 4 5% 24% 32% 23%	4092
January	1st to 10th	Night	24% 5% 3 20% 37% 10%	7646
	11th to 20th	Night	11% 3 3 17% 44% 22%	7650
	21st to end	Night	23% 4 3 13% 31% 26%	8370
February	1st to 10th	Night	15% 3 5% 21% 32% 24%	2604
	11th to 20th	Night	19% 5% 5% 20% 31% 20%	2458
	21st to end	Night	13% 4 3 15% 35% 30%	2076
March	1st to 10th	Night	14% 3 3 10% 38% 31%	5319
	11th to 20th	Night	22% 3 3 14% 35% 23%	5110
	21st to end	Night	10% 3 5% 22% 40% 20%	5358
April	1st to 10th	Night	15% 3 4 16% 37% 25%	2100
	11th to 20th	Night	16% 3 5% 15% 30% 31%	2077
	21st to end	Night	14% 4 5% 18% 34% 25%	2100
May	1st to 10th	Night	22% 5% 8% 17% 26% 23%	5888
	11th to 20th	Night	15% 4 5% 13% 31% 32%	5826
	21st to end	Night	17% 5% 6% 10% 15% 46%	5353
June	1st to 10th	Night	25% 6% 10% 17% 19% 23%	1680
	11th to 20th	Night	17% 5% 5% 14% 18% 40%	1680
	21st to end	Night	28% 8% 11% 16% 16% 21%	1680
July	1st to 10th	Night	29% 7% 11% 20% 21% 11%	4936
	11th to 20th	Night	26% 9% 20% 26% 15% 3	5286
	21st to end	Night	32% 9% 20% 26% 12% 1	5677
August	1st to 10th	Night	26% 10% 18% 23% 17% 6%	3281
	11th to 20th	Night	23% 8% 13% 25% 27% 4	3343
	21st to end	Night	29% 11% 18% 25% 13% 3	3687
September	1st to 10th	Night	30% 7% 13% 19% 21% 10%	2000
	11th to 20th	Night	25% 6% 10% 19% 23% 18%	2005
	21st to end	Night	19% 5% 7% 20% 30% 19%	2200
October	1st to 10th	Night	15% 4 5% 13% 31% 32%	3903
	11th to 20th	Night	17% 4 6% 17% 27% 29%	3898
	21st to end	Night	10% 2 2 17% 37% 32%	4252
November	1st to 10th	Night	13% 3 3 18% 39% 24%	2489
	11th to 20th	Night	14% 3 5% 18% 37% 24%	2730
	21st to end	Night	20% 4 4 19% 32% 21%	2730
December	1st to 10th	Night	17% 3 4 26% 30% 20%	4435
	11th to 20th	Night	15% 4 5% 17% 36% 24%	5322
	21st to end	Night	16% 4 4 21% 36% 19%	7128

Seeing (when cloud cover <= 80%)
Color Meanings: Too cloudy to forecast Bad 1/5 Poor 2/5 Average 3/5 Good 4/5 Excellent 5/5
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	8% 30% 35% 22% 4 1	330
	11th to 20th	Day	13% 22% 33% 23% 8% 1	330
	21st to end	Day	6% 23% 39% 23% 8% 1	363
February	1st to 10th	Day	8% 28% 32% 23% 8% 1	330
	11th to 20th	Day	15% 26% 39% 15% 4 1	330
	21st to end	Day	13% 30% 34% 19% 3 1	273
March	1st to 10th	Day	13% 24% 37% 21% 5%	404
	11th to 20th	Day	16% 23% 35% 18% 7% 1	540
	21st to end	Day	12% 28% 36% 19% 6%	594
April	1st to 10th	Day	11% 22% 37% 23% 5% 1	540
	11th to 20th	Day	13% 26% 39% 17% 4 1	532
	21st to end	Day	9% 25% 39% 22% 4 1	540
May	1st to 10th	Day	8% 18% 41% 27% 5% 1	543
	11th to 20th	Day	8% 18% 34% 27% 11% 3	573
	21st to end	Day	4 12% 35% 35% 12% 1	844
June	1st to 10th	Day	2 7% 26% 37% 22% 5%	780
	11th to 20th	Day	3 5% 29% 35% 24% 3	780
	21st to end	Day	8% 4 19% 36% 27% 7%	780
July	1st to 10th	Day	5% 2 11% 37% 34% 11%	685
	11th to 20th	Day	2 2 6% 33% 40% 17%	564
	21st to end	Day	4 1 4 31% 37% 22%	619
August	1st to 10th	Day	4 3 7% 32% 38% 16%	567
	11th to 20th	Day	5% 3 8% 35% 33% 15%	557
	21st to end	Day	5% 2 8% 36% 35% 13%	620
September	1st to 10th	Day	7% 3 15% 36% 28% 12%	530
	11th to 20th	Day	6% 4 19% 39% 24% 8%	524
	21st to end	Day	5% 6% 23% 37% 23% 5%	330
October	1st to 10th	Day	6% 9% 28% 32% 18% 8%	330
	11th to 20th	Day	11% 11% 30% 27% 16% 5%	330
	21st to end	Day	10% 14% 30% 29% 13% 4	363
November	1st to 10th	Day	10% 19% 35% 20% 15% 1	330
	11th to 20th	Day	8% 15% 35% 25% 14% 4	330
	21st to end	Day	10% 27% 35% 19% 8% 1	330
December	1st to 10th	Day	10% 22% 36% 23% 7% 2	330
	11th to 20th	Day	7% 26% 39% 22% 5% 1	330
	21st to end	Day	13% 28% 36% 18% 3 1	363
January	1st to 10th	Night	5% 19% 40% 25% 9% 1	856
	11th to 20th	Night	5% 21% 39% 24% 8% 2	840
	21st to end	Night	6% 22% 37% 25% 9% 1	924
February	1st to 10th	Night	4 20% 40% 28% 8%	840
	11th to 20th	Night	8% 23% 41% 24% 4	824
	21st to end	Night	7% 22% 49% 20% 3	692
March	1st to 10th	Night	5% 22% 38% 29% 6%	840
	11th to 20th	Night	9% 16% 37% 28% 9% 1	840
	21st to end	Night	4 20% 40% 29% 6% 1	814
April	1st to 10th	Night	6% 17% 42% 30% 4	630
	11th to 20th	Night	6% 19% 45% 25% 4	623
	21st to end	Night	4 17% 46% 29% 4	630
May	1st to 10th	Night	6% 10% 42% 35% 7%	630
	11th to 20th	Night	5% 12% 33% 35% 14% 1	621
	21st to end	Night	3 10% 36% 39% 12%	683
June	1st to 10th	Night	5% 5% 30% 41% 18% 1	630
	11th to 20th	Night	4 3 33% 42% 17% 1	630
	21st to end	Night	6% 3 19% 44% 26% 3	630
July	1st to 10th	Night	6% 2 10% 40% 39% 4	615
	11th to 20th	Night	2 2 4 38% 46% 8%	612
	21st to end	Night	4 2 5% 32% 47% 10%	690
August	1st to 10th	Night	4 3 6% 32% 45% 10%	627
	11th to 20th	Night	4 2 7% 35% 45% 7%	624
	21st to end	Night	3 2 6% 38% 43% 8%	687
September	1st to 10th	Night	9% 2 8% 40% 37% 5%	600
	11th to 20th	Night	7% 2 14% 47% 27% 3	600
	21st to end	Night	7% 4 19% 42% 25% 3	600
October	1st to 10th	Night	6% 6% 26% 41% 18% 2	783
	11th to 20th	Night	4 8% 32% 39% 15% 2	800
	21st to end	Night	5% 11% 31% 31% 18% 3	880
November	1st to 10th	Night	3 12% 31% 39% 12% 2	849
	11th to 20th	Night	3 15% 34% 33% 13% 2	1050
	21st to end	Night	7% 18% 32% 29% 12% 1	1050
December	1st to 10th	Night	7% 18% 35% 30% 10%	1050
	11th to 20th	Night	5% 23% 38% 27% 7%	1050
	21st to end	Night	8% 21% 42% 24% 5% 1	1155

Page generated at 2026-08-27 02:07:15. Version ac07

Copyright © 2026 Attilla Danko.