ZEC Kisskissink
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the ZEC Kisskissink clear sky chart from 2005-11-06 to 2025-04-11.

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	17% 13% 5% 11% 6% 5% 5% 4 5% 6% 23%	112956
	Night	15% 15% 5% 12% 7% 6% 5% 3 4 5% 22%	115357
Transparency	Day	61% 6% 10% 15% 7% 1	116423
	Night	64% 6% 10% 14% 6%	120055
Seeing	Day	27% 18% 31% 17% 6% 1	15550
	Night	25% 15% 31% 22% 6% 1	24253

By Month

Percentage Cloud Cover NE (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	11% 22% 11% 21% 9% 6% 6% 2 3 3 7%	3597
	11th to 20th	Day	8% 14% 8% 24% 13% 8% 6% 3 4 4 9%	3570
	21st to end	Day	6% 10% 6% 20% 7% 5% 7% 4 5% 5% 23%	3960
February	1st to 10th	Day	8% 15% 6% 15% 11% 9% 8% 4 4 5% 15%	1606
	11th to 20th	Day	12% 17% 7% 15% 7% 7% 6% 4 5% 4 16%	1869
	21st to end	Day	10% 17% 6% 13% 7% 6% 6% 4 4 5% 21%	1650
March	1st to 10th	Day	13% 21% 6% 14% 6% 4 3 3 4 3 23%	4476
	11th to 20th	Day	12% 17% 6% 16% 5% 6% 5% 3 4 4 20%	4653
	21st to end	Day	12% 18% 5% 12% 5% 4 4 3 4 5% 28%	5959
April	1st to 10th	Day	20% 19% 6% 10% 5% 4 3 2 3 5% 23%	2400
	11th to 20th	Day	19% 15% 3 8% 4 3 3 3 5% 6% 31%	2323
	21st to end	Day	21% 14% 3 10% 5% 5% 4 3 4 6% 27%	2470
May	1st to 10th	Day	20% 12% 3 9% 5% 6% 5% 4 5% 7% 24%	4380
	11th to 20th	Day	16% 9% 3 7% 5% 5% 5% 4 6% 8% 31%	4398
	21st to end	Day	18% 9% 3 8% 6% 5% 5% 4 6% 7% 30%	4898
June	1st to 10th	Day	22% 10% 3 8% 5% 5% 4 4 6% 6% 26%	2850
	11th to 20th	Day	20% 8% 2 7% 4 5% 4 4 6% 8% 30%	2850
	21st to end	Day	25% 8% 3 7% 7% 5% 5% 4 6% 7% 24%	2850
July	1st to 10th	Day	18% 9% 3 8% 5% 5% 5% 5% 7% 8% 26%	4521
	11th to 20th	Day	17% 9% 3 9% 6% 6% 6% 4 6% 8% 27%	4440
	21st to end	Day	15% 8% 3 8% 5% 6% 6% 5% 7% 7% 32%	4814
August	1st to 10th	Day	18% 8% 3 8% 6% 5% 6% 5% 8% 9% 23%	4423
	11th to 20th	Day	20% 8% 3 7% 5% 5% 6% 4 7% 8% 24%	4146
	21st to end	Day	19% 11% 4 9% 5% 4 4 4 5% 6% 30%	4285
September	1st to 10th	Day	20% 10% 2 7% 5% 5% 4 4 5% 7% 32%	2280
	11th to 20th	Day	19% 10% 3 6% 4 3 4 4 5% 7% 36%	2156
	21st to end	Day	23% 12% 3 6% 5% 4 4 3 5% 6% 30%	2090
October	1st to 10th	Day	21% 13% 5% 8% 5% 4 4 4 5% 6% 26%	2019
	11th to 20th	Day	26% 20% 5% 9% 5% 4 3 3 4 5% 16%	1765
	21st to end	Day	26% 21% 5% 7% 4 3 3 3 4 5% 19%	1881
November	1st to 10th	Day	19% 22% 6% 10% 5% 4 4 3 3 3 20%	1761
	11th to 20th	Day	21% 20% 7% 13% 6% 4 3 2 2 4 19%	1697
	21st to end	Day	19% 24% 7% 15% 9% 3 2 2 3 4 12%	1440
December	1st to 10th	Day	15% 19% 8% 17% 13% 6% 5% 3 3 2 9%	2280
	11th to 20th	Day	15% 18% 5% 15% 10% 7% 6% 3 4 4 13%	2618
	21st to end	Day	15% 19% 7% 15% 10% 7% 5% 3 4 4 12%	3581
January	1st to 10th	Night	12% 22% 11% 19% 9% 8% 5% 2 2 2 7%	6349
	11th to 20th	Night	8% 15% 8% 23% 15% 8% 4 3 3 3 11%	6315
	21st to end	Night	5% 11% 7% 14% 9% 10% 9% 5% 6% 5% 19%	6996
February	1st to 10th	Night	8% 14% 7% 13% 9% 9% 7% 4 5% 5% 19%	2790
	11th to 20th	Night	9% 19% 7% 16% 8% 7% 5% 4 4 4 17%	2416
	21st to end	Night	9% 18% 6% 12% 7% 6% 6% 4 5% 6% 20%	1980
March	1st to 10th	Night	15% 17% 5% 14% 8% 5% 5% 5% 4 5% 18%	5364
	11th to 20th	Night	12% 16% 5% 12% 8% 7% 6% 4 5% 6% 19%	5306
	21st to end	Night	13% 15% 5% 13% 6% 6% 4 3 5% 5% 26%	4972
April	1st to 10th	Night	20% 19% 5% 10% 5% 4 3 2 3 4 23%	2000
	11th to 20th	Night	21% 13% 4 7% 4 4 3 4 5% 7% 29%	1813
	21st to end	Night	18% 14% 4 8% 6% 4 4 3 5% 6% 30%	1710
May	1st to 10th	Night	20% 12% 3 8% 5% 4 4 3 4 5% 32%	2589
	11th to 20th	Night	17% 11% 3 7% 5% 5% 4 3 5% 7% 32%	2495
	21st to end	Night	22% 9% 2 8% 5% 4 4 4 5% 7% 29%	2676
June	1st to 10th	Night	19% 10% 3 8% 6% 3 5% 4 4 7% 31%	1330
	11th to 20th	Night	17% 8% 3 7% 5% 3 5% 4 6% 9% 33%	1330
	21st to end	Night	19% 10% 3 8% 5% 5% 5% 4 5% 8% 29%	1330
July	1st to 10th	Night	17% 10% 3 8% 5% 5% 5% 4 7% 7% 28%	2423
	11th to 20th	Night	15% 9% 3 8% 6% 6% 5% 4 6% 8% 31%	2520
	21st to end	Night	15% 6% 2 6% 5% 4 5% 3 5% 8% 40%	2739
August	1st to 10th	Night	15% 7% 3 7% 4 5% 7% 5% 7% 7% 33%	2506
	11th to 20th	Night	19% 9% 2 8% 5% 5% 5% 4 6% 8% 30%	2651
	21st to end	Night	17% 8% 3 7% 5% 4 5% 4 5% 6% 35%	3370
September	1st to 10th	Night	20% 7% 3 6% 4 3 4 3 5% 7% 38%	1900
	11th to 20th	Night	19% 8% 3 7% 3 4 5% 3 5% 7% 37%	2023
	21st to end	Night	18% 11% 3 8% 5% 4 4 3 4 5% 37%	2090
October	1st to 10th	Night	19% 11% 3 7% 5% 4 4 3 5% 5% 33%	2159
	11th to 20th	Night	25% 17% 4 7% 4 5% 4 3 4 6% 22%	2414
	21st to end	Night	25% 19% 5% 8% 5% 5% 4 3 4 5% 19%	2717
November	1st to 10th	Night	19% 18% 7% 11% 6% 5% 3 3 4 4 20%	2537
	11th to 20th	Night	18% 17% 7% 12% 6% 5% 4 3 4 5% 18%	2700
	21st to end	Night	19% 21% 7% 15% 7% 5% 4 3 3 4 12%	2959
December	1st to 10th	Night	12% 18% 9% 21% 12% 6% 4 3 3 3 10%	4910
	11th to 20th	Night	18% 18% 6% 14% 9% 6% 4 3 3 3 16%	5591
	21st to end	Night	15% 20% 7% 15% 8% 6% 4 3 3 4 15%	7387

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	85% 3 5% 6% 1	3598
	11th to 20th	Day	79% 4 7% 6% 4	3600
	21st to end	Day	61% 5% 5% 16% 11%	3960
February	1st to 10th	Day	72% 4 6% 10% 7% 1	1606
	11th to 20th	Day	72% 3 8% 9% 7% 1	1878
	21st to end	Day	66% 4 7% 16% 5% 2	1650
March	1st to 10th	Day	67% 4 6% 11% 10% 3	4479
	11th to 20th	Day	66% 5% 9% 11% 8% 1	4653
	21st to end	Day	60% 3 5% 14% 15% 3	5959
April	1st to 10th	Day	67% 4 8% 11% 8% 3	2400
	11th to 20th	Day	55% 5% 8% 18% 12% 2	2323
	21st to end	Day	60% 4 9% 13% 12% 2	2470
May	1st to 10th	Day	57% 7% 10% 14% 10% 1	4394
	11th to 20th	Day	49% 9% 12% 22% 8% 1	4402
	21st to end	Day	52% 7% 8% 17% 14% 2	4898
June	1st to 10th	Day	58% 6% 9% 18% 8% 2	2850
	11th to 20th	Day	50% 8% 12% 19% 9% 2	2850
	21st to end	Day	58% 8% 10% 14% 9%	2850
July	1st to 10th	Day	52% 8% 13% 23% 3	4451
	11th to 20th	Day	53% 9% 17% 18% 3	4365
	21st to end	Day	49% 9% 15% 22% 5%	4661
August	1st to 10th	Day	52% 10% 18% 17% 3	4409
	11th to 20th	Day	53% 10% 19% 14% 3	4188
	21st to end	Day	54% 6% 13% 16% 10%	4285
September	1st to 10th	Day	51% 7% 14% 21% 7%	2280
	11th to 20th	Day	48% 7% 17% 21% 7%	2156
	21st to end	Day	56% 6% 14% 17% 7%	2090
October	1st to 10th	Day	56% 7% 12% 20% 5%	3357
	11th to 20th	Day	67% 5% 12% 14% 1	2903
	21st to end	Day	63% 6% 15% 13% 2	3081
November	1st to 10th	Day	68% 6% 9% 12% 4	1761
	11th to 20th	Day	72% 5% 8% 10% 4 1	1697
	21st to end	Day	80% 4 8% 7% 1	1440
December	1st to 10th	Day	83% 4 5% 7% 1	2280
	11th to 20th	Day	75% 5% 5% 12% 3	2618
	21st to end	Day	77% 3 5% 9% 6%	3581
January	1st to 10th	Night	86% 3 6% 5% 1	6349
	11th to 20th	Night	80% 4 6% 7% 3 1	6360
	21st to end	Night	64% 6% 8% 15% 8%	6996
February	1st to 10th	Night	67% 5% 6% 13% 7% 1	2790
	11th to 20th	Night	72% 3 8% 11% 5% 1	2418
	21st to end	Night	66% 4 8% 15% 7% 1	1980
March	1st to 10th	Night	69% 5% 6% 10% 9%	5374
	11th to 20th	Night	64% 7% 11% 11% 7%	5307
	21st to end	Night	60% 4 6% 18% 9% 2	4972
April	1st to 10th	Night	65% 4 8% 13% 8% 2	2000
	11th to 20th	Night	56% 5% 9% 19% 10% 1	1813
	21st to end	Night	56% 5% 7% 19% 11% 1	1710
May	1st to 10th	Night	53% 8% 9% 18% 11% 1	2595
	11th to 20th	Night	47% 9% 15% 19% 9%	2496
	21st to end	Night	52% 7% 11% 17% 12% 1	2677
June	1st to 10th	Night	54% 6% 10% 20% 8% 2	1330
	11th to 20th	Night	47% 8% 14% 18% 11% 3	1330
	21st to end	Night	53% 8% 13% 17% 10%	1330
July	1st to 10th	Night	53% 9% 14% 21% 3	2383
	11th to 20th	Night	50% 8% 20% 18% 4	2472
	21st to end	Night	41% 8% 20% 22% 9%	2651
August	1st to 10th	Night	49% 9% 18% 18% 6%	2496
	11th to 20th	Night	51% 9% 20% 16% 4	2675
	21st to end	Night	48% 8% 14% 23% 7%	3370
September	1st to 10th	Night	47% 7% 14% 24% 8%	1900
	11th to 20th	Night	48% 6% 18% 23% 5%	2023
	21st to end	Night	52% 6% 13% 23% 6%	2090
October	1st to 10th	Night	54% 6% 14% 20% 5% 1	3601
	11th to 20th	Night	62% 5% 13% 17% 3	4015
	21st to end	Night	64% 6% 12% 12% 5%	4467
November	1st to 10th	Night	69% 6% 9% 12% 4	2537
	11th to 20th	Night	70% 5% 9% 12% 4	2700
	21st to end	Night	79% 4 8% 8% 2	2959
December	1st to 10th	Night	81% 4 6% 7% 2	4910
	11th to 20th	Night	75% 3 5% 13% 3	5592
	21st to end	Night	75% 3 6% 11% 5%	7387

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	23% 20% 42% 13% 3	200
	11th to 20th	Day	20% 21% 35% 18% 7%	200
	21st to end	Day	19% 18% 35% 21% 5% 1	220
February	1st to 10th	Day	20% 30% 39% 9% 2	204
	11th to 20th	Day	24% 25% 34% 15% 2	417
	21st to end	Day	20% 27% 35% 14% 3	414
March	1st to 10th	Day	25% 21% 32% 18% 5%	500
	11th to 20th	Day	28% 18% 32% 15% 6%	500
	21st to end	Day	27% 23% 29% 16% 4 1	550
April	1st to 10th	Day	34% 20% 27% 13% 5% 1	500
	11th to 20th	Day	33% 18% 26% 13% 8% 2	452
	21st to end	Day	29% 20% 35% 12% 3 1	460
May	1st to 10th	Day	32% 19% 29% 14% 6% 1	463
	11th to 20th	Day	24% 18% 34% 17% 6% 1	487
	21st to end	Day	26% 24% 32% 13% 4	564
June	1st to 10th	Day	27% 17% 30% 19% 7% 1	680
	11th to 20th	Day	26% 14% 31% 20% 8% 1	680
	21st to end	Day	27% 12% 31% 22% 7% 1	680
July	1st to 10th	Day	21% 14% 33% 25% 6% 1	540
	11th to 20th	Day	20% 15% 33% 21% 9% 1	484
	21st to end	Day	22% 11% 33% 25% 8% 1	532
August	1st to 10th	Day	23% 14% 30% 22% 9% 1	486
	11th to 20th	Day	22% 9% 29% 26% 11% 3	479
	21st to end	Day	25% 16% 26% 18% 10% 6%	539
September	1st to 10th	Day	28% 17% 27% 17% 9% 3	490
	11th to 20th	Day	24% 13% 29% 22% 8% 3	490
	21st to end	Day	27% 17% 25% 17% 11% 3	490
October	1st to 10th	Day	26% 20% 26% 18% 8% 3	490
	11th to 20th	Day	37% 18% 26% 11% 7% 1	418
	21st to end	Day	39% 17% 27% 14% 3	429
November	1st to 10th	Day	36% 21% 32% 8% 3	395
	11th to 20th	Day	30% 21% 29% 13% 6%	297
	21st to end	Day	36% 25% 28% 10% 2 1	200
December	1st to 10th	Day	32% 12% 32% 20% 5% 1	200
	11th to 20th	Day	28% 23% 40% 6% 3 2	200
	21st to end	Day	31% 20% 30% 13% 5% 1	220
January	1st to 10th	Night	25% 17% 35% 19% 5%	800
	11th to 20th	Night	25% 19% 29% 21% 6% 1	800
	21st to end	Night	14% 15% 37% 26% 8% 1	880
February	1st to 10th	Night	17% 19% 36% 22% 6%	800
	11th to 20th	Night	22% 16% 40% 16% 5%	783
	21st to end	Night	20% 18% 36% 20% 5%	660
March	1st to 10th	Night	22% 18% 34% 21% 5%	800
	11th to 20th	Night	25% 17% 33% 19% 6% 1	800
	21st to end	Night	21% 20% 31% 22% 5%	880
April	1st to 10th	Night	30% 14% 30% 22% 4 1	800
	11th to 20th	Night	30% 14% 29% 21% 6% 1	685
	21st to end	Night	28% 17% 32% 20% 3	570
May	1st to 10th	Night	27% 14% 33% 21% 5%	429
	11th to 20th	Night	24% 13% 31% 25% 7%	374
	21st to end	Night	28% 16% 32% 20% 3 1	411
June	1st to 10th	Night	23% 9% 35% 26% 6% 1	380
	11th to 20th	Night	17% 12% 33% 28% 8% 1	380
	21st to end	Night	21% 12% 28% 30% 7% 1	380
July	1st to 10th	Night	22% 10% 31% 27% 10%	370
	11th to 20th	Night	18% 7% 30% 35% 10% 1	368
	21st to end	Night	20% 7% 28% 35% 9%	416
August	1st to 10th	Night	17% 8% 30% 34% 10% 1	378
	11th to 20th	Night	23% 5% 27% 30% 14% 1	479
	21st to end	Night	23% 11% 28% 22% 13% 2	769
September	1st to 10th	Night	24% 9% 29% 28% 9% 1	760
	11th to 20th	Night	25% 9% 26% 27% 11% 1	760
	21st to end	Night	23% 13% 29% 24% 10% 1	760
October	1st to 10th	Night	26% 14% 30% 23% 7% 1	760
	11th to 20th	Night	35% 13% 29% 15% 7%	760
	21st to end	Night	38% 15% 29% 14% 4	836
November	1st to 10th	Night	30% 18% 32% 14% 5% 1	780
	11th to 20th	Night	30% 18% 29% 17% 6% 1	800
	21st to end	Night	33% 18% 29% 17% 3	880
December	1st to 10th	Night	28% 17% 29% 19% 6%	900
	11th to 20th	Night	26% 18% 32% 18% 5% 1	900
	21st to end	Night	28% 19% 29% 19% 4 1	965

Page generated at 2025-04-08 09:17:26. Version ac07

Copyright © 2025 Attilla Danko.