Kenosha Pass
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Kenosha Pass clear sky chart from 2005-11-06 to 2024-01-12.

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	4 6% 3 6% 6% 3 5% 5% 6% 8% 47%	74757
	Night	2 4 2 4 4 3 4 4 5% 8% 59%	74995
Transparency	Day	33% 4 11% 24% 21% 7%	74468
	Night	23% 4 14% 29% 23% 7%	74806
Seeing	Day	14% 19% 27% 23% 13% 3	14376
	Night	6% 15% 33% 31% 14% 2	24551

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	2 3 6% 4 2 5% 4 7% 9% 60%	1518
	11th to 20th	Day	4 3 6% 5% 3 6% 4 4 7% 57%	1556
	21st to end	Day	4 4 7% 6% 4 4 6% 6% 8% 51%	1782
February	1st to 10th	Day	3 4 7% 6% 3 5% 4 6% 9% 53%	1620
	11th to 20th	Day	3 2 5% 6% 4 5% 5% 4 9% 57%	1696
	21st to end	Day	3 4 8% 8% 4 5% 6% 5% 6% 51%	1480
March	1st to 10th	Day	1 6% 3 6% 6% 4 5% 5% 4 8% 50%	1822
	11th to 20th	Day	2 9% 4 8% 6% 3 5% 4 6% 8% 46%	1980
	21st to end	Day	2 7% 4 8% 7% 4 5% 5% 6% 9% 42%	2281
April	1st to 10th	Day	2 7% 3 6% 5% 3 5% 6% 6% 8% 48%	2160
	11th to 20th	Day	3 12% 4 10% 7% 4 6% 4 5% 7% 38%	2131
	21st to end	Day	4 11% 5% 7% 7% 3 6% 5% 6% 7% 38%	2160
May	1st to 10th	Day	6% 12% 5% 8% 6% 3 5% 5% 6% 7% 35%	2245
	11th to 20th	Day	8% 12% 4 8% 7% 4 5% 6% 6% 7% 34%	2478
	21st to end	Day	7% 10% 3 8% 6% 4 6% 6% 6% 8% 36%	2724
June	1st to 10th	Day	5% 6% 3 7% 6% 4 6% 6% 6% 8% 43%	2520
	11th to 20th	Day	7% 7% 2 5% 5% 3 5% 5% 6% 7% 49%	2520
	21st to end	Day	5% 5% 2 5% 6% 4 6% 7% 7% 9% 44%	2520
July	1st to 10th	Day	7% 6% 3 7% 7% 5% 7% 6% 7% 9% 36%	2520
	11th to 20th	Day	7% 6% 3 7% 7% 4 6% 6% 8% 8% 38%	2520
	21st to end	Day	11% 8% 5% 8% 8% 5% 7% 6% 7% 7% 29%	2624
August	1st to 10th	Day	12% 9% 4 8% 8% 5% 5% 6% 7% 7% 29%	2328
	11th to 20th	Day	8% 7% 3 7% 7% 4 6% 6% 6% 6% 40%	2153
	21st to end	Day	8% 7% 4 6% 8% 4 6% 6% 6% 6% 38%	2376
September	1st to 10th	Day	7% 7% 3 5% 6% 3 5% 4 5% 5% 49%	2160
	11th to 20th	Day	8% 5% 2 6% 6% 4 5% 4 5% 5% 51%	2160
	21st to end	Day	6% 6% 2 5% 5% 3 4 4 4 7% 56%	1957
October	1st to 10th	Day	6% 7% 2 5% 5% 3 5% 4 5% 5% 54%	1800
	11th to 20th	Day	3 5% 2 3 4 2 3 4 5% 6% 64%	1800
	21st to end	Day	3 6% 2 6% 4 2 3 3 4 7% 59%	1961
November	1st to 10th	Day	1 4 2 2 3 2 3 3 5% 8% 68%	1673
	11th to 20th	Day	3 2 3 3 2 3 3 5% 8% 67%	1710
	21st to end	Day	4 4 4 4 2 3 3 5% 10% 60%	1582
December	1st to 10th	Day	4 2 6% 5% 3 5% 5% 5% 9% 57%	1520
	11th to 20th	Day	3 2 5% 5% 3 4 5% 4 10% 57%	1926
	21st to end	Day	4 3 8% 6% 3 4 4 5% 9% 54%	2794
January	1st to 10th	Night	2 1 4 4 3 4 5% 5% 9% 63%	2647
	11th to 20th	Night	2 2 3 3 3 3 3 4 9% 66%	2460
	21st to end	Night	2 2 5% 4 3 3 4 5% 8% 64%	2574
February	1st to 10th	Night	2 2 5% 4 3 4 4 5% 9% 63%	2340
	11th to 20th	Night	3 2 6% 4 2 4 4 6% 8% 61%	2151
	21st to end	Night	4 3 5% 4 3 3 4 5% 9% 60%	1776
March	1st to 10th	Night	4 2 4 4 2 3 5% 6% 9% 60%	2135
	11th to 20th	Night	1 5% 3 6% 4 3 4 3 4 7% 59%	1980
	21st to end	Night	2 5% 3 5% 4 3 4 4 5% 8% 57%	2075
April	1st to 10th	Night	1 4 2 4 4 2 4 5% 5% 8% 61%	1800
	11th to 20th	Night	2 9% 3 6% 4 3 4 5% 5% 7% 53%	1777
	21st to end	Night	4 9% 3 5% 4 3 3 4 5% 8% 53%	1800
May	1st to 10th	Night	5% 7% 4 6% 5% 2 4 4 6% 8% 49%	1711
	11th to 20th	Night	7% 8% 3 5% 6% 3 5% 6% 6% 7% 46%	1417
	21st to end	Night	6% 6% 3 4 4 3 4 4 5% 9% 52%	1552
June	1st to 10th	Night	3 4 1 4 3 2 5% 4 6% 11% 57%	1440
	11th to 20th	Night	5% 3 1 3 3 2 3 4 5% 9% 62%	1440
	21st to end	Night	3 3 1 3 4 3 5% 5% 6% 9% 58%	1440
July	1st to 10th	Night	6% 4 2 4 5% 4 6% 6% 7% 8% 47%	1440
	11th to 20th	Night	2 3 2 5% 5% 3 6% 6% 6% 9% 54%	1440
	21st to end	Night	5% 5% 2 5% 5% 4 6% 7% 8% 10% 42%	1691
August	1st to 10th	Night	5% 6% 2 6% 5% 4 6% 5% 5% 9% 46%	1611
	11th to 20th	Night	6% 4 2 4 4 3 4 6% 7% 8% 52%	1748
	21st to end	Night	5% 5% 2 5% 6% 3 4 5% 6% 9% 50%	1980
September	1st to 10th	Night	5% 4 2 3 5% 3 6% 5% 6% 8% 54%	1800
	11th to 20th	Night	5% 4 2 4 4 3 4 5% 4 6% 59%	1800
	21st to end	Night	5% 4 2 4 3 2 4 4 5% 7% 61%	1999
October	1st to 10th	Night	5% 5% 1 3 4 2 4 4 5% 7% 60%	2160
	11th to 20th	Night	2 3 1 3 2 2 2 3 4 6% 73%	2160
	21st to end	Night	2 6% 3 4 4 2 3 4 4 6% 63%	2376
November	1st to 10th	Night	1 3 1 2 3 1 3 3 5% 8% 70%	2405
	11th to 20th	Night	3 2 3 3 2 3 3 5% 8% 69%	2470
	21st to end	Night	1 5% 2 4 4 2 4 4 5% 9% 61%	2596
December	1st to 10th	Night	3 1 4 4 2 3 4 4 9% 64%	2660
	11th to 20th	Night	3 2 4 4 3 4 6% 7% 9% 57%	3271
	21st to end	Night	4 2 6% 6% 3 4 4 5% 8% 57%	4873

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	20% 2 19% 34% 20% 5%	1519
	11th to 20th	Day	26% 2 18% 26% 23% 5%	1556
	21st to end	Day	26% 4 14% 33% 17% 6%	1782
February	1st to 10th	Day	25% 4 18% 29% 18% 6%	1620
	11th to 20th	Day	23% 3 12% 28% 27% 7%	1706
	21st to end	Day	29% 4 11% 24% 24% 8%	1480
March	1st to 10th	Day	30% 2 12% 29% 24% 3	1822
	11th to 20th	Day	35% 3 12% 29% 17% 6%	1980
	21st to end	Day	35% 3 12% 28% 18% 4	2281
April	1st to 10th	Day	30% 4 13% 25% 20% 8%	2160
	11th to 20th	Day	43% 3 11% 21% 19% 3	2134
	21st to end	Day	41% 3 9% 30% 15% 2	2160
May	1st to 10th	Day	44% 4 9% 23% 17% 3	2245
	11th to 20th	Day	47% 5% 12% 24% 10% 1	2482
	21st to end	Day	43% 5% 10% 22% 15% 5%	2724
June	1st to 10th	Day	35% 5% 12% 21% 20% 7%	2520
	11th to 20th	Day	33% 4 8% 20% 22% 14%	2520
	21st to end	Day	33% 5% 9% 20% 21% 11%	2520
July	1st to 10th	Day	41% 6% 10% 16% 18% 9%	2451
	11th to 20th	Day	39% 7% 12% 21% 13% 7%	2445
	21st to end	Day	50% 6% 16% 15% 10% 3	2478
August	1st to 10th	Day	50% 6% 13% 13% 13% 5%	2313
	11th to 20th	Day	41% 5% 10% 18% 19% 7%	2153
	21st to end	Day	41% 5% 9% 20% 18% 6%	2376
September	1st to 10th	Day	36% 4 8% 15% 24% 14%	2160
	11th to 20th	Day	33% 3 10% 19% 26% 10%	2160
	21st to end	Day	28% 2 5% 26% 30% 8%	1957
October	1st to 10th	Day	31% 4 6% 22% 28% 9%	1800
	11th to 20th	Day	21% 3 5% 28% 35% 9%	1800
	21st to end	Day	26% 2 9% 30% 24% 9%	1961
November	1st to 10th	Day	17% 2 12% 24% 35% 10%	1673
	11th to 20th	Day	16% 2 11% 36% 25% 10%	1710
	21st to end	Day	20% 3 11% 30% 24% 12%	1582
December	1st to 10th	Day	23% 5% 16% 30% 20% 6%	1520
	11th to 20th	Day	23% 3 15% 32% 23% 4	1924
	21st to end	Day	27% 3 9% 26% 26% 10%	2794
January	1st to 10th	Night	18% 3 16% 34% 23% 5%	2647
	11th to 20th	Night	17% 3 18% 30% 24% 7%	2460
	21st to end	Night	20% 3 11% 35% 25% 6%	2574
February	1st to 10th	Night	20% 3 15% 34% 22% 6%	2340
	11th to 20th	Night	20% 4 12% 31% 27% 6%	2151
	21st to end	Night	21% 2 11% 30% 27% 9%	1776
March	1st to 10th	Night	20% 4 11% 32% 29% 4	2135
	11th to 20th	Night	25% 3 11% 34% 21% 5%	1980
	21st to end	Night	26% 4 13% 32% 21% 4	2075
April	1st to 10th	Night	20% 5% 15% 31% 23% 5%	1800
	11th to 20th	Night	30% 3 12% 31% 20% 3	1777
	21st to end	Night	29% 4 14% 33% 19% 1	1800
May	1st to 10th	Night	33% 4 13% 30% 17% 3	1711
	11th to 20th	Night	36% 6% 18% 26% 13% 1	1418
	21st to end	Night	31% 4 14% 25% 21% 5%	1552
June	1st to 10th	Night	22% 4 22% 28% 17% 8%	1440
	11th to 20th	Night	19% 4 14% 23% 25% 14%	1440
	21st to end	Night	21% 5% 15% 24% 24% 12%	1440
July	1st to 10th	Night	30% 7% 15% 24% 14% 9%	1400
	11th to 20th	Night	24% 6% 19% 26% 18% 7%	1392
	21st to end	Night	33% 8% 27% 21% 9% 2	1597
August	1st to 10th	Night	33% 8% 22% 19% 13% 5%	1602
	11th to 20th	Night	29% 5% 17% 23% 22% 6%	1748
	21st to end	Night	30% 6% 14% 26% 18% 5%	1980
September	1st to 10th	Night	26% 5% 11% 24% 24% 10%	1800
	11th to 20th	Night	25% 5% 11% 25% 22% 12%	1800
	21st to end	Night	23% 3 9% 32% 27% 6%	1999
October	1st to 10th	Night	25% 4 10% 26% 25% 10%	2160
	11th to 20th	Night	14% 3 8% 30% 34% 11%	2160
	21st to end	Night	22% 3 9% 30% 28% 8%	2376
November	1st to 10th	Night	14% 3 12% 28% 32% 11%	2405
	11th to 20th	Night	14% 3 11% 36% 28% 9%	2470
	21st to end	Night	20% 3 11% 31% 25% 10%	2596
December	1st to 10th	Night	18% 4 17% 30% 24% 7%	2660
	11th to 20th	Night	21% 4 15% 29% 28% 4	3272
	21st to end	Night	26% 3 11% 26% 24% 10%	4873

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	16% 22% 30% 20% 10% 3	270
	11th to 20th	Day	11% 31% 33% 20% 4 1	245
	21st to end	Day	11% 29% 39% 17% 3	264
February	1st to 10th	Day	20% 35% 31% 12% 1	240
	11th to 20th	Day	20% 32% 33% 11% 4 1	240
	21st to end	Day	21% 34% 28% 15% 1 1	198
March	1st to 10th	Day	17% 29% 29% 19% 6%	262
	11th to 20th	Day	16% 27% 32% 19% 6%	420
	21st to end	Day	17% 36% 31% 13% 3	462
April	1st to 10th	Day	20% 31% 30% 15% 3 1	420
	11th to 20th	Day	28% 32% 25% 9% 4 1	412
	21st to end	Day	22% 31% 28% 14% 4 1	420
May	1st to 10th	Day	18% 26% 29% 20% 6% 1	481
	11th to 20th	Day	17% 16% 28% 23% 14% 2	625
	21st to end	Day	16% 16% 25% 24% 16% 2	679
June	1st to 10th	Day	10% 13% 26% 27% 19% 5%	630
	11th to 20th	Day	12% 13% 28% 29% 14% 3	630
	21st to end	Day	6% 12% 28% 30% 19% 4	630
July	1st to 10th	Day	9% 4 18% 36% 26% 7%	621
	11th to 20th	Day	9% 4 16% 33% 30% 8%	618
	21st to end	Day	12% 7% 16% 31% 27% 7%	566
August	1st to 10th	Day	17% 6% 24% 31% 16% 6%	447
	11th to 20th	Day	10% 8% 24% 31% 20% 7%	437
	21st to end	Day	12% 10% 22% 31% 18% 6%	495
September	1st to 10th	Day	12% 10% 26% 27% 19% 6%	450
	11th to 20th	Day	10% 11% 29% 31% 16% 4	450
	21st to end	Day	11% 16% 24% 24% 17% 8%	280
October	1st to 10th	Day	13% 19% 23% 20% 17% 8%	270
	11th to 20th	Day	13% 22% 27% 24% 11% 3	270
	21st to end	Day	14% 23% 31% 22% 9% 1	297
November	1st to 10th	Day	14% 26% 31% 18% 11% 1	270
	11th to 20th	Day	16% 22% 32% 23% 6% 2	270
	21st to end	Day	10% 22% 42% 19% 6% 1	270
December	1st to 10th	Day	14% 30% 31% 17% 6% 2	270
	11th to 20th	Day	14% 29% 36% 15% 6% 1	270
	21st to end	Day	18% 27% 32% 15% 6% 2	297
January	1st to 10th	Night	7% 23% 36% 25% 9% 1	950
	11th to 20th	Night	8% 24% 38% 20% 8% 1	822
	21st to end	Night	5% 21% 45% 23% 6% 1	792
February	1st to 10th	Night	5% 23% 49% 17% 5%	720
	11th to 20th	Night	5% 24% 44% 21% 6%	704
	21st to end	Night	4 22% 48% 25% 2	592
March	1st to 10th	Night	5% 20% 43% 26% 6% 1	720
	11th to 20th	Night	4 16% 38% 34% 8% 1	720
	21st to end	Night	6% 16% 49% 24% 5%	689
April	1st to 10th	Night	5% 19% 44% 27% 4	540
	11th to 20th	Night	8% 19% 39% 26% 9% 1	533
	21st to end	Night	9% 16% 34% 33% 8% 1	540
May	1st to 10th	Night	9% 9% 38% 32% 11% 1	540
	11th to 20th	Night	10% 10% 25% 39% 15% 2	531
	21st to end	Night	9% 10% 25% 38% 17% 2	584
June	1st to 10th	Night	4 6% 23% 42% 23% 2	540
	11th to 20th	Night	6% 6% 30% 44% 12% 2	540
	21st to end	Night	4 4 19% 44% 26% 3	540
July	1st to 10th	Night	7% 3 10% 41% 37% 4	525
	11th to 20th	Night	4 2 7% 41% 43% 4	522
	21st to end	Night	7% 2 6% 36% 43% 6%	591
August	1st to 10th	Night	7% 2 10% 42% 35% 4	537
	11th to 20th	Night	7% 2 9% 46% 31% 5%	534
	21st to end	Night	6% 4 12% 40% 32% 5%	594
September	1st to 10th	Night	5% 3 14% 47% 25% 6%	540
	11th to 20th	Night	6% 3 19% 45% 23% 3	540
	21st to end	Night	7% 6% 27% 38% 18% 3	569
October	1st to 10th	Night	7% 8% 36% 30% 16% 3	720
	11th to 20th	Night	5% 13% 38% 31% 12% 2	720
	21st to end	Night	7% 13% 38% 31% 10% 2	792
November	1st to 10th	Night	4 16% 43% 27% 9% 1	925
	11th to 20th	Night	6% 21% 42% 23% 5% 1	950
	21st to end	Night	5% 18% 40% 29% 7%	950
December	1st to 10th	Night	6% 23% 42% 23% 5% 1	950
	11th to 20th	Night	5% 24% 41% 24% 7%	950
	21st to end	Night	7% 26% 39% 21% 6% 1	1045

Page generated at 2024-01-09 14:24:21. Version ac07

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