Carmangay Village
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Carmangay Village clear sky chart from 2005-11-06 to 2026-04-02.

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	8% 8% 3 7% 5% 5% 5% 4 6% 8% 42%	135110
	Night	6% 8% 3 8% 5% 5% 5% 4 6% 8% 40%	135441
Transparency	Day	38% 6% 14% 26% 13% 3	134811
	Night	40% 7% 15% 24% 12% 2	135319
Seeing	Day	12% 10% 26% 28% 18% 6%	17121
	Night	11% 10% 32% 32% 14% 2	26455

By Month

Percentage Cloud Cover NW (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	4 11% 5% 12% 7% 5% 5% 4 7% 9% 30%	4125
	11th to 20th	Day	3 7% 4 10% 6% 5% 5% 5% 6% 7% 41%	4221
	21st to end	Day	2 5% 4 12% 6% 5% 4 4 5% 10% 43%	5186
February	1st to 10th	Day	5% 13% 4 10% 8% 7% 6% 4 6% 8% 29%	1741
	11th to 20th	Day	6% 12% 5% 10% 7% 4 6% 5% 6% 8% 30%	1845
	21st to end	Day	3 13% 5% 11% 8% 5% 5% 4 6% 7% 32%	1662
March	1st to 10th	Day	4 11% 4 9% 5% 5% 5% 4 6% 11% 38%	4652
	11th to 20th	Day	4 8% 4 9% 6% 5% 5% 4 5% 8% 40%	5109
	21st to end	Day	9% 16% 5% 13% 6% 5% 5% 5% 7% 8% 22%	5607
April	1st to 10th	Day	9% 14% 4 9% 6% 5% 6% 4 5% 7% 32%	2470
	11th to 20th	Day	10% 13% 4 8% 5% 5% 5% 5% 6% 8% 33%	2570
	21st to end	Day	10% 10% 3 8% 5% 5% 6% 4 7% 8% 35%	2600
May	1st to 10th	Day	15% 10% 3 5% 3 3 4 4 6% 7% 41%	6020
	11th to 20th	Day	11% 7% 3 9% 6% 6% 6% 5% 8% 9% 30%	6734
	21st to end	Day	10% 7% 2 7% 5% 6% 5% 4 6% 7% 39%	7405
June	1st to 10th	Day	13% 8% 3 6% 4 6% 5% 5% 6% 9% 36%	3000
	11th to 20th	Day	16% 7% 2 7% 6% 5% 5% 5% 6% 8% 32%	3000
	21st to end	Day	9% 4 2 5% 4 4 5% 4 8% 9% 47%	3000
July	1st to 10th	Day	7% 4 2 5% 3 3 4 4 6% 8% 55%	6780
	11th to 20th	Day	7% 4 1 5% 3 4 4 4 7% 9% 52%	6780
	21st to end	Day	7% 4 1 4 2 3 4 3 6% 7% 59%	7200
August	1st to 10th	Day	8% 5% 2 5% 3 4 5% 4 7% 11% 46%	4479
	11th to 20th	Day	5% 4 2 5% 4 4 5% 4 6% 9% 51%	4158
	21st to end	Day	8% 3 1 4 3 3 4 3 6% 8% 57%	4664
September	1st to 10th	Day	10% 4 2 4 3 3 3 3 5% 7% 55%	2472
	11th to 20th	Day	12% 6% 3 5% 3 3 4 3 5% 8% 48%	2200
	21st to end	Day	9% 6% 2 6% 3 5% 4 3 5% 8% 50%	2200
October	1st to 10th	Day	7% 7% 3 6% 5% 5% 4 4 8% 8% 43%	3412
	11th to 20th	Day	6% 7% 2 6% 4 4 5% 4 6% 9% 48%	3099
	21st to end	Day	7% 7% 2 6% 4 4 5% 4 7% 7% 46%	3200
November	1st to 10th	Day	10% 13% 4 8% 6% 4 4 4 7% 6% 33%	1712
	11th to 20th	Day	6% 10% 3 7% 5% 4 5% 3 6% 9% 40%	1680
	21st to end	Day	4 11% 4 11% 5% 5% 4 4 7% 9% 37%	1480
December	1st to 10th	Day	4 13% 5% 11% 6% 5% 5% 3 5% 9% 35%	2360
	11th to 20th	Day	4 9% 4 11% 7% 7% 6% 4 7% 9% 31%	2712
	21st to end	Day	3 10% 4 8% 6% 5% 5% 5% 7% 7% 40%	3575
January	1st to 10th	Night	3 13% 5% 11% 6% 6% 6% 4 6% 8% 30%	8768
	11th to 20th	Night	3 8% 4 11% 5% 5% 6% 4 6% 8% 40%	8723
	21st to end	Night	2 7% 4 11% 6% 6% 6% 5% 6% 8% 39%	8994
February	1st to 10th	Night	6% 12% 4 12% 7% 6% 5% 5% 6% 8% 31%	2878
	11th to 20th	Night	5% 11% 5% 11% 7% 6% 6% 5% 6% 7% 30%	2662
	21st to end	Night	4 12% 5% 10% 7% 5% 5% 5% 6% 6% 35%	2141
March	1st to 10th	Night	2 7% 4 11% 7% 5% 4 4 7% 11% 37%	5462
	11th to 20th	Night	4 8% 3 9% 6% 5% 6% 4 8% 9% 38%	5110
	21st to end	Night	10% 17% 5% 11% 5% 5% 5% 4 7% 8% 23%	5610
April	1st to 10th	Night	8% 12% 4 8% 6% 5% 4 5% 7% 8% 33%	1951
	11th to 20th	Night	10% 11% 3 10% 5% 5% 6% 4 6% 7% 34%	1781
	21st to end	Night	11% 9% 3 8% 7% 5% 5% 4 6% 7% 35%	1800
May	1st to 10th	Night	14% 11% 3 8% 4 4 5% 3 5% 5% 36%	3940
	11th to 20th	Night	10% 8% 3 8% 6% 5% 6% 5% 8% 9% 32%	3159
	21st to end	Night	10% 6% 3 8% 5% 5% 6% 4 6% 7% 40%	3470
June	1st to 10th	Night	14% 8% 3 6% 5% 4 4 4 6% 8% 39%	1400
	11th to 20th	Night	16% 7% 2 6% 5% 5% 6% 5% 7% 9% 33%	1400
	21st to end	Night	7% 4 1 6% 5% 4 4 4 6% 9% 48%	1400
July	1st to 10th	Night	6% 3 1 6% 4 4 4 4 6% 9% 52%	3180
	11th to 20th	Night	7% 4 2 4 4 3 6% 4 7% 10% 50%	3180
	21st to end	Night	6% 5% 2 5% 4 3 4 3 5% 7% 56%	3639
August	1st to 10th	Night	7% 4 1 6% 4 5% 5% 4 6% 10% 50%	2671
	11th to 20th	Night	5% 4 2 7% 4 5% 6% 5% 8% 11% 44%	2901
	21st to end	Night	6% 3 1 4 3 3 4 3 6% 8% 60%	3245
September	1st to 10th	Night	8% 4 2 5% 3 4 3 3 7% 8% 52%	1925
	11th to 20th	Night	10% 5% 2 5% 3 3 4 3 5% 7% 52%	2200
	21st to end	Night	8% 6% 2 5% 4 4 5% 4 6% 8% 49%	2200
October	1st to 10th	Night	7% 4 2 5% 4 4 4 3 5% 8% 54%	3782
	11th to 20th	Night	6% 7% 2 6% 5% 4 4 4 5% 7% 50%	4046
	21st to end	Night	5% 5% 3 6% 5% 5% 5% 4 5% 8% 47%	4600
November	1st to 10th	Night	9% 12% 3 7% 6% 5% 5% 5% 6% 8% 35%	2785
	11th to 20th	Night	5% 10% 3 7% 5% 5% 5% 5% 6% 8% 40%	2940
	21st to end	Night	4 11% 3 8% 5% 4 4 4 6% 11% 39%	3135
December	1st to 10th	Night	4 10% 3 9% 6% 6% 8% 5% 8% 8% 33%	5040
	11th to 20th	Night	3 10% 4 10% 8% 7% 6% 5% 7% 9% 31%	5700
	21st to end	Night	4 10% 4 8% 5% 5% 5% 4 7% 8% 41%	7623

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	48% 6% 14% 21% 9% 2	4125
	11th to 20th	Day	40% 5% 15% 21% 14% 4	4242
	21st to end	Day	37% 6% 13% 30% 12% 1	5187
February	1st to 10th	Day	52% 7% 11% 17% 10% 2	1741
	11th to 20th	Day	47% 8% 15% 18% 9% 2	1854
	21st to end	Day	49% 6% 12% 19% 12% 1	1662
March	1st to 10th	Day	39% 5% 14% 23% 17% 1	4652
	11th to 20th	Day	40% 6% 16% 23% 14% 1	5110
	21st to end	Day	56% 7% 16% 15% 5%	5607
April	1st to 10th	Day	49% 8% 13% 21% 8% 1	2470
	11th to 20th	Day	47% 8% 13% 21% 10% 2	2570
	21st to end	Day	45% 7% 13% 22% 12% 1	2600
May	1st to 10th	Day	42% 5% 9% 23% 16% 4	6020
	11th to 20th	Day	45% 8% 14% 24% 8% 1	6738
	21st to end	Day	40% 7% 15% 25% 13% 1	7406
June	1st to 10th	Day	43% 8% 16% 21% 11% 2	3000
	11th to 20th	Day	46% 10% 13% 20% 11% 2	3000
	21st to end	Day	31% 8% 17% 29% 12% 3	3000
July	1st to 10th	Day	27% 5% 14% 26% 22% 5%	6706
	11th to 20th	Day	28% 5% 19% 30% 15% 3	6699
	21st to end	Day	24% 5% 14% 28% 18% 11%	6996
August	1st to 10th	Day	30% 7% 13% 34% 13% 2	4462
	11th to 20th	Day	28% 6% 19% 35% 10% 2	4197
	21st to end	Day	25% 5% 12% 39% 17% 2	4663
September	1st to 10th	Day	28% 6% 14% 28% 16% 8%	2472
	11th to 20th	Day	34% 6% 12% 30% 15% 3	2200
	21st to end	Day	32% 6% 13% 32% 14% 3	2200
October	1st to 10th	Day	36% 5% 12% 33% 13% 1	3412
	11th to 20th	Day	32% 5% 19% 26% 16% 2	3099
	21st to end	Day	34% 6% 12% 32% 12% 4	3200
November	1st to 10th	Day	48% 8% 12% 21% 9% 1	1712
	11th to 20th	Day	41% 6% 19% 24% 9% 1	1680
	21st to end	Day	43% 6% 18% 21% 10% 2	1480
December	1st to 10th	Day	48% 6% 14% 24% 7% 2	2360
	11th to 20th	Day	47% 7% 19% 21% 5% 1	2714
	21st to end	Day	41% 6% 11% 22% 19% 1	3575
January	1st to 10th	Night	50% 6% 13% 21% 9% 1	8769
	11th to 20th	Night	42% 5% 17% 21% 13% 3	8764
	21st to end	Night	40% 7% 16% 26% 11% 1	8994
February	1st to 10th	Night	50% 7% 12% 15% 13% 2	2878
	11th to 20th	Night	51% 7% 11% 19% 11% 1	2663
	21st to end	Night	47% 6% 14% 20% 10% 2	2141
March	1st to 10th	Night	39% 7% 18% 23% 11% 2	5462
	11th to 20th	Night	39% 8% 17% 24% 12%	5110
	21st to end	Night	56% 7% 16% 15% 6% 1	5610
April	1st to 10th	Night	46% 9% 12% 22% 11% 1	1951
	11th to 20th	Night	48% 7% 13% 22% 10% 1	1781
	21st to end	Night	46% 8% 12% 23% 10% 2	1800
May	1st to 10th	Night	48% 6% 9% 22% 11% 3	3937
	11th to 20th	Night	43% 10% 12% 28% 6% 1	3159
	21st to end	Night	39% 8% 16% 25% 11% 2	3470
June	1st to 10th	Night	43% 8% 13% 24% 12% 1	1400
	11th to 20th	Night	45% 7% 15% 21% 10% 2	1400
	21st to end	Night	30% 8% 18% 27% 15% 2	1400
July	1st to 10th	Night	27% 7% 18% 21% 22% 5%	3145
	11th to 20th	Night	28% 8% 18% 30% 13% 4	3138
	21st to end	Night	28% 5% 14% 27% 16% 10%	3538
August	1st to 10th	Night	30% 7% 15% 28% 17% 3	2663
	11th to 20th	Night	32% 6% 19% 27% 13% 3	2928
	21st to end	Night	22% 5% 13% 38% 18% 4	3245
September	1st to 10th	Night	29% 6% 12% 28% 18% 7%	1925
	11th to 20th	Night	30% 6% 14% 27% 18% 5%	2200
	21st to end	Night	31% 6% 15% 29% 16% 4	2200
October	1st to 10th	Night	28% 5% 11% 32% 21% 3	3782
	11th to 20th	Night	33% 5% 16% 25% 18% 3	4046
	21st to end	Night	34% 6% 12% 32% 16% 1	4600
November	1st to 10th	Night	45% 8% 13% 22% 10% 1	2785
	11th to 20th	Night	38% 9% 17% 21% 15% 1	2940
	21st to end	Night	40% 7% 21% 20% 10% 3	3135
December	1st to 10th	Night	47% 8% 17% 18% 8% 2	5040
	11th to 20th	Night	48% 8% 21% 18% 5% 1	5697
	21st to end	Night	39% 6% 13% 25% 14% 3	7623

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	6% 12% 32% 30% 11% 8%	220
	11th to 20th	Day	10% 11% 32% 27% 15% 5%	220
	21st to end	Day	5% 14% 34% 31% 13% 3	242
February	1st to 10th	Day	13% 15% 30% 28% 10% 4	253
	11th to 20th	Day	8% 13% 29% 35% 12% 3	330
	21st to end	Day	13% 15% 28% 26% 15% 3	378
March	1st to 10th	Day	12% 18% 32% 22% 11% 5%	540
	11th to 20th	Day	10% 13% 30% 28% 15% 4	540
	21st to end	Day	12% 16% 33% 24% 12% 3	594
April	1st to 10th	Day	14% 16% 30% 27% 10% 3	505
	11th to 20th	Day	15% 14% 25% 27% 16% 4	492
	21st to end	Day	16% 11% 27% 27% 15% 4	500
May	1st to 10th	Day	15% 8% 23% 27% 19% 8%	548
	11th to 20th	Day	17% 6% 22% 25% 23% 6%	725
	21st to end	Day	16% 7% 18% 30% 21% 8%	789
June	1st to 10th	Day	14% 10% 24% 29% 18% 4	730
	11th to 20th	Day	17% 11% 24% 29% 17% 3	730
	21st to end	Day	10% 4 22% 34% 23% 8%	730
July	1st to 10th	Day	8% 5% 17% 34% 27% 9%	721
	11th to 20th	Day	7% 5% 23% 32% 25% 8%	718
	21st to end	Day	6% 4 21% 37% 24% 8%	719
August	1st to 10th	Day	9% 5% 17% 34% 25% 9%	527
	11th to 20th	Day	7% 4 21% 31% 26% 11%	517
	21st to end	Day	9% 6% 23% 28% 22% 11%	583
September	1st to 10th	Day	10% 8% 27% 25% 22% 9%	530
	11th to 20th	Day	14% 8% 22% 25% 22% 8%	530
	21st to end	Day	14% 14% 28% 26% 14% 4	530
October	1st to 10th	Day	14% 11% 20% 25% 24% 6%	420
	11th to 20th	Day	11% 15% 32% 22% 15% 6%	330
	21st to end	Day	15% 18% 28% 23% 13% 3	363
November	1st to 10th	Day	19% 15% 29% 24% 9% 3	330
	11th to 20th	Day	12% 15% 36% 26% 8% 2	330
	21st to end	Day	6% 17% 32% 25% 13% 8%	225
December	1st to 10th	Day	10% 15% 35% 23% 14% 4	220
	11th to 20th	Day	10% 16% 38% 20% 13% 2	220
	21st to end	Day	8% 12% 28% 31% 15% 6%	242
January	1st to 10th	Night	9% 16% 35% 26% 11% 2	1050
	11th to 20th	Night	10% 13% 35% 31% 10% 2	1033
	21st to end	Night	9% 13% 37% 29% 11% 2	924
February	1st to 10th	Night	11% 13% 29% 31% 14% 3	840
	11th to 20th	Night	9% 9% 32% 36% 12% 2	824
	21st to end	Night	10% 9% 30% 28% 21% 2	692
March	1st to 10th	Night	8% 11% 35% 30% 14% 2	840
	11th to 20th	Night	10% 12% 36% 31% 9% 2	840
	21st to end	Night	12% 10% 32% 31% 12% 2	924
April	1st to 10th	Night	12% 10% 36% 28% 12% 1	729
	11th to 20th	Night	14% 10% 33% 32% 10% 1	593
	21st to end	Night	14% 9% 29% 35% 12% 1	600
May	1st to 10th	Night	13% 8% 27% 33% 17% 1	590
	11th to 20th	Night	13% 6% 26% 32% 21% 3	394
	21st to end	Night	16% 9% 21% 30% 22% 1	433
June	1st to 10th	Night	17% 7% 28% 32% 15% 1	400
	11th to 20th	Night	20% 6% 29% 32% 13%	400
	21st to end	Night	8% 4 28% 38% 21% 1	400
July	1st to 10th	Night	9% 3 18% 43% 25% 1	390
	11th to 20th	Night	8% 4 23% 42% 22% 1	388
	21st to end	Night	5% 3 23% 43% 25% 2	438
August	1st to 10th	Night	8% 2 20% 41% 27% 2	434
	11th to 20th	Night	7% 3 20% 46% 22% 2	594
	21st to end	Night	8% 4 24% 42% 20% 2	660
September	1st to 10th	Night	11% 4 24% 38% 22% 2	670
	11th to 20th	Night	14% 3 23% 34% 24% 2	800
	21st to end	Night	11% 8% 34% 33% 12% 3	800
October	1st to 10th	Night	13% 7% 27% 33% 18% 2	800
	11th to 20th	Night	13% 8% 34% 30% 14% 2	800
	21st to end	Night	11% 12% 35% 29% 11% 1	880
November	1st to 10th	Night	16% 11% 42% 22% 8% 1	940
	11th to 20th	Night	11% 16% 40% 24% 7% 2	1050
	21st to end	Night	9% 13% 37% 29% 10% 2	1050
December	1st to 10th	Night	11% 10% 33% 31% 14% 2	1050
	11th to 20th	Night	9% 12% 38% 32% 8% 2	1050
	21st to end	Night	12% 12% 35% 28% 10% 2	1155

Page generated at 2026-03-30 00:18:40. Version ac07

Copyright © 2026 Attilla Danko.