Kickapoo Valley Reserve Visitor Center
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Kickapoo Valley Reserve Visitor Center clear sky chart from 2005-11-06 to 2024-01-14.

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	13% 9% 4 7% 6% 3 5% 5% 5% 7% 36%	74770
	Night	13% 9% 4 7% 6% 3 4 4 5% 7% 38%	75017
Transparency	Day	46% 6% 13% 22% 11% 1	74470
	Night	45% 6% 12% 22% 13% 2	74837
Seeing	Day	17% 12% 30% 24% 12% 4	14762
	Night	17% 11% 31% 29% 11% 1	24767

By Month

Percentage Cloud Cover SE (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	10% 12% 6% 9% 8% 3 6% 5% 5% 7% 28%	1517
	11th to 20th	Day	11% 15% 8% 10% 9% 3 5% 5% 6% 7% 22%	1464
	21st to end	Day	12% 14% 6% 11% 9% 4 5% 5% 6% 7% 22%	1706
February	1st to 10th	Day	10% 11% 6% 10% 5% 4 6% 6% 5% 7% 31%	1620
	11th to 20th	Day	13% 10% 6% 7% 6% 3 5% 5% 5% 6% 34%	1619
	21st to end	Day	13% 10% 5% 10% 8% 3 5% 4 4 7% 31%	1480
March	1st to 10th	Day	14% 11% 7% 7% 5% 3 4 4 5% 5% 34%	1800
	11th to 20th	Day	13% 9% 4 6% 5% 3 4 5% 5% 7% 39%	1980
	21st to end	Day	19% 12% 3 7% 6% 2 5% 5% 4 7% 31%	2297
April	1st to 10th	Day	18% 11% 5% 7% 6% 3 4 4 4 6% 31%	2160
	11th to 20th	Day	17% 12% 3 6% 6% 3 5% 3 5% 6% 32%	2134
	21st to end	Day	19% 10% 4 7% 5% 4 5% 5% 6% 6% 30%	2172
May	1st to 10th	Day	16% 9% 4 7% 6% 4 5% 6% 6% 8% 30%	2513
	11th to 20th	Day	17% 8% 3 7% 6% 4 5% 5% 5% 8% 33%	2479
	21st to end	Day	16% 6% 2 6% 6% 3 5% 6% 6% 7% 36%	2725
June	1st to 10th	Day	11% 5% 3 5% 4 3 4 5% 6% 9% 45%	2520
	11th to 20th	Day	12% 6% 2 6% 5% 3 5% 5% 5% 8% 42%	2520
	21st to end	Day	12% 6% 3 5% 7% 3 5% 5% 6% 9% 40%	2520
July	1st to 10th	Day	8% 4 2 5% 4 3 6% 6% 7% 9% 47%	2520
	11th to 20th	Day	8% 4 2 6% 5% 4 5% 5% 6% 9% 45%	2520
	21st to end	Day	8% 3 2 4 5% 3 5% 5% 7% 10% 46%	2743
August	1st to 10th	Day	7% 5% 2 6% 6% 4 6% 7% 8% 10% 40%	2414
	11th to 20th	Day	13% 6% 3 5% 5% 4 4 5% 6% 7% 42%	2247
	21st to end	Day	11% 6% 2 5% 5% 3 5% 5% 6% 8% 45%	2376
September	1st to 10th	Day	14% 6% 2 5% 6% 3 4 4 5% 8% 43%	2160
	11th to 20th	Day	12% 7% 2 4 5% 3 4 5% 5% 7% 46%	2152
	21st to end	Day	13% 6% 3 5% 5% 3 4 4 5% 8% 42%	1937
October	1st to 10th	Day	15% 7% 2 5% 5% 2 5% 4 4 6% 44%	1800
	11th to 20th	Day	18% 9% 4 5% 5% 2 4 4 6% 6% 37%	1800
	21st to end	Day	17% 10% 4 7% 6% 3 4 4 3 5% 38%	1860
November	1st to 10th	Day	13% 8% 3 6% 5% 3 3 4 5% 8% 41%	1672
	11th to 20th	Day	14% 12% 4 10% 7% 3 4 4 4 7% 31%	1602
	21st to end	Day	13% 9% 4 8% 6% 3 4 3 4 6% 39%	1520
December	1st to 10th	Day	13% 13% 5% 10% 7% 3 5% 4 5% 6% 30%	1520
	11th to 20th	Day	13% 12% 6% 8% 6% 4 5% 4 5% 8% 27%	1918
	21st to end	Day	18% 20% 9% 10% 7% 3 3 3 3 4 18%	2783
January	1st to 10th	Night	10% 10% 6% 9% 7% 5% 5% 5% 5% 6% 32%	2648
	11th to 20th	Night	12% 13% 6% 11% 8% 4 5% 4 5% 7% 26%	2575
	21st to end	Night	12% 13% 7% 11% 7% 4 5% 4 5% 7% 26%	2646
February	1st to 10th	Night	8% 12% 6% 10% 7% 5% 5% 6% 4 6% 32%	2340
	11th to 20th	Night	10% 9% 4 8% 6% 4 6% 5% 5% 5% 38%	2228
	21st to end	Night	15% 11% 4 8% 6% 3 4 4 4 6% 35%	1776
March	1st to 10th	Night	15% 9% 5% 6% 6% 3 4 6% 5% 7% 35%	2160
	11th to 20th	Night	14% 8% 3 6% 6% 3 6% 5% 6% 7% 38%	1995
	21st to end	Night	20% 10% 3 7% 6% 3 5% 4 5% 6% 33%	2058
April	1st to 10th	Night	17% 8% 4 8% 5% 3 5% 4 4 6% 36%	1800
	11th to 20th	Night	20% 8% 3 5% 6% 3 4 3 5% 7% 37%	1775
	21st to end	Night	19% 7% 3 5% 5% 3 5% 5% 6% 7% 35%	1787
May	1st to 10th	Night	18% 8% 3 5% 4 3 5% 6% 6% 7% 35%	1444
	11th to 20th	Night	15% 8% 3 6% 4 3 4 4 5% 7% 40%	1416
	21st to end	Night	13% 6% 2 5% 4 3 5% 5% 6% 9% 43%	1551
June	1st to 10th	Night	10% 5% 3 5% 5% 3 4 5% 7% 9% 46%	1440
	11th to 20th	Night	11% 5% 3 6% 6% 3 2 4 5% 8% 47%	1440
	21st to end	Night	8% 5% 2 5% 5% 2 4 5% 6% 9% 50%	1440
July	1st to 10th	Night	6% 4 2 3 3 3 4 5% 5% 9% 56%	1440
	11th to 20th	Night	7% 3 2 3 4 3 3 5% 7% 9% 53%	1440
	21st to end	Night	6% 3 2 4 4 2 4 5% 7% 9% 54%	1575
August	1st to 10th	Night	5% 4 2 4 5% 3 5% 6% 6% 10% 51%	1522
	11th to 20th	Night	9% 5% 2 4 5% 3 3 4 6% 6% 53%	1654
	21st to end	Night	10% 4 3 4 3 2 4 4 5% 6% 54%	1980
September	1st to 10th	Night	11% 5% 3 4 5% 2 4 4 5% 7% 51%	1800
	11th to 20th	Night	13% 5% 2 3 4 3 3 4 4 7% 53%	1800
	21st to end	Night	11% 5% 2 5% 5% 2 4 4 5% 6% 51%	2010
October	1st to 10th	Night	13% 6% 3 4 4 3 4 4 4 6% 50%	2160
	11th to 20th	Night	16% 7% 3 6% 5% 2 4 5% 5% 7% 40%	2160
	21st to end	Night	17% 10% 4 6% 4 3 4 5% 6% 6% 36%	2494
November	1st to 10th	Night	13% 8% 3 6% 4 3 5% 4 5% 5% 44%	2406
	11th to 20th	Night	13% 11% 5% 9% 8% 4 4 4 5% 6% 33%	2574
	21st to end	Night	15% 10% 3 8% 5% 3 4 4 4 5% 38%	2660
December	1st to 10th	Night	12% 11% 5% 9% 7% 4 5% 4 6% 8% 29%	2660
	11th to 20th	Night	13% 13% 6% 11% 8% 4 5% 5% 4 5% 27%	3279
	21st to end	Night	19% 16% 6% 11% 7% 4 5% 4 4 5% 20%	4884

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	55% 6% 13% 18% 9%	1518
	11th to 20th	Day	62% 4 11% 14% 8%	1464
	21st to end	Day	61% 4 13% 13% 8% 1	1706
February	1st to 10th	Day	52% 6% 15% 17% 10% 1	1620
	11th to 20th	Day	50% 5% 12% 22% 9% 2	1628
	21st to end	Day	54% 5% 10% 18% 12% 2	1480
March	1st to 10th	Day	52% 5% 13% 21% 8% 1	1800
	11th to 20th	Day	45% 5% 13% 22% 13% 2	1980
	21st to end	Day	53% 6% 10% 22% 8% 1	2297
April	1st to 10th	Day	54% 5% 12% 19% 10% 1	2160
	11th to 20th	Day	52% 5% 9% 21% 10% 2	2134
	21st to end	Day	52% 7% 11% 18% 11% 1	2172
May	1st to 10th	Day	50% 8% 14% 20% 8% 1	2513
	11th to 20th	Day	49% 6% 13% 20% 11% 1	2483
	21st to end	Day	45% 7% 11% 21% 14% 2	2725
June	1st to 10th	Day	35% 7% 14% 28% 14% 2	2520
	11th to 20th	Day	39% 7% 14% 23% 16% 1	2520
	21st to end	Day	41% 8% 14% 24% 13% 1	2520
July	1st to 10th	Day	32% 9% 15% 30% 12% 2	2451
	11th to 20th	Day	34% 7% 14% 25% 17% 2	2445
	21st to end	Day	30% 8% 17% 28% 14% 3	2591
August	1st to 10th	Day	33% 10% 16% 28% 10% 2	2399
	11th to 20th	Day	39% 7% 13% 27% 13% 1	2247
	21st to end	Day	36% 7% 13% 26% 17% 2	2376
September	1st to 10th	Day	39% 7% 13% 25% 17% 1	2160
	11th to 20th	Day	37% 6% 14% 31% 12% 1	2152
	21st to end	Day	40% 6% 12% 29% 13%	1937
October	1st to 10th	Day	41% 5% 12% 30% 12%	1800
	11th to 20th	Day	46% 6% 12% 23% 11% 1	1800
	21st to end	Day	49% 5% 12% 21% 12% 1	1860
November	1st to 10th	Day	41% 5% 14% 23% 15% 2	1672
	11th to 20th	Day	54% 5% 11% 20% 9% 1	1602
	21st to end	Day	46% 5% 16% 23% 9% 1	1520
December	1st to 10th	Day	55% 6% 12% 17% 8% 1	1520
	11th to 20th	Day	56% 5% 16% 15% 7% 1	1915
	21st to end	Day	71% 4 7% 13% 5%	2783
January	1st to 10th	Night	51% 6% 11% 21% 10% 1	2648
	11th to 20th	Night	58% 6% 14% 14% 8%	2575
	21st to end	Night	58% 5% 12% 15% 9% 1	2646
February	1st to 10th	Night	53% 5% 11% 20% 10% 2	2340
	11th to 20th	Night	47% 5% 12% 22% 12% 1	2229
	21st to end	Night	51% 5% 11% 21% 11% 2	1776
March	1st to 10th	Night	49% 6% 13% 22% 9% 2	2160
	11th to 20th	Night	44% 6% 13% 23% 13% 2	1995
	21st to end	Night	52% 5% 9% 21% 11% 2	2058
April	1st to 10th	Night	49% 6% 9% 20% 14% 2	1800
	11th to 20th	Night	47% 5% 9% 21% 15% 3	1775
	21st to end	Night	46% 7% 13% 19% 14% 2	1787
May	1st to 10th	Night	45% 8% 12% 20% 14%	1444
	11th to 20th	Night	43% 7% 13% 23% 14% 1	1417
	21st to end	Night	36% 8% 13% 25% 16% 2	1552
June	1st to 10th	Night	33% 7% 14% 27% 17% 1	1440
	11th to 20th	Night	35% 7% 10% 26% 19% 2	1440
	21st to end	Night	30% 8% 15% 27% 16% 4	1440
July	1st to 10th	Night	25% 6% 15% 33% 18% 3	1400
	11th to 20th	Night	26% 7% 16% 28% 20% 3	1392
	21st to end	Night	24% 7% 18% 30% 17% 4	1487
August	1st to 10th	Night	27% 9% 15% 31% 16% 3	1513
	11th to 20th	Night	31% 6% 15% 29% 16% 2	1654
	21st to end	Night	30% 6% 13% 27% 19% 4	1980
September	1st to 10th	Night	33% 6% 11% 27% 23% 1	1800
	11th to 20th	Night	33% 4 12% 33% 17% 1	1800
	21st to end	Night	33% 6% 11% 30% 19% 1	2010
October	1st to 10th	Night	36% 5% 10% 29% 19% 2	2160
	11th to 20th	Night	42% 6% 13% 21% 17% 1	2160
	21st to end	Night	47% 6% 11% 22% 13% 1	2494
November	1st to 10th	Night	41% 5% 12% 24% 16% 2	2406
	11th to 20th	Night	53% 5% 13% 18% 10% 1	2574
	21st to end	Night	49% 4 13% 25% 8% 1	2660
December	1st to 10th	Night	54% 5% 13% 20% 7% 1	2660
	11th to 20th	Night	58% 6% 11% 18% 7% 1	3281
	21st to end	Night	67% 4 9% 14% 5%	4884

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	17% 18% 35% 20% 7% 3	270
	11th to 20th	Day	23% 18% 36% 15% 6% 1	249
	21st to end	Day	21% 18% 37% 19% 5%	264
February	1st to 10th	Day	17% 23% 40% 16% 3 1	240
	11th to 20th	Day	22% 26% 33% 15% 5%	240
	21st to end	Day	21% 24% 40% 13% 2	198
March	1st to 10th	Day	21% 20% 40% 14% 5%	240
	11th to 20th	Day	22% 20% 34% 16% 7% 2	240
	21st to end	Day	30% 13% 32% 15% 9% 1	383
April	1st to 10th	Day	28% 15% 35% 18% 4	420
	11th to 20th	Day	28% 17% 27% 17% 9% 2	412
	21st to end	Day	24% 15% 31% 20% 8% 2	420
May	1st to 10th	Day	20% 16% 32% 23% 7% 2	596
	11th to 20th	Day	21% 14% 29% 23% 10% 2	625
	21st to end	Day	19% 10% 28% 23% 15% 4	679
June	1st to 10th	Day	11% 7% 30% 33% 17% 3	630
	11th to 20th	Day	15% 9% 33% 26% 14% 3	630
	21st to end	Day	13% 9% 31% 29% 14% 4	630
July	1st to 10th	Day	7% 3 23% 30% 25% 11%	621
	11th to 20th	Day	9% 7% 29% 31% 18% 6%	618
	21st to end	Day	6% 4 30% 35% 19% 7%	684
August	1st to 10th	Day	7% 3 24% 33% 24% 8%	626
	11th to 20th	Day	16% 5% 19% 29% 22% 10%	561
	21st to end	Day	14% 9% 20% 30% 20% 7%	495
September	1st to 10th	Day	17% 8% 23% 29% 17% 5%	450
	11th to 20th	Day	15% 6% 24% 31% 19% 5%	450
	21st to end	Day	19% 13% 27% 24% 14% 2	407
October	1st to 10th	Day	17% 11% 33% 26% 10% 2	270
	11th to 20th	Day	25% 18% 35% 16% 6%	270
	21st to end	Day	25% 20% 34% 15% 4 1	297
November	1st to 10th	Day	20% 15% 38% 20% 6% 2	270
	11th to 20th	Day	22% 17% 40% 17% 4 1	270
	21st to end	Day	22% 17% 40% 16% 4	270
December	1st to 10th	Day	15% 21% 40% 17% 7%	270
	11th to 20th	Day	19% 18% 37% 19% 6%	270
	21st to end	Day	31% 17% 37% 13% 2	297
January	1st to 10th	Night	14% 17% 36% 25% 7% 1	950
	11th to 20th	Night	19% 13% 37% 25% 5% 1	920
	21st to end	Night	19% 12% 37% 26% 5% 1	990
February	1st to 10th	Night	15% 17% 36% 26% 6% 1	900
	11th to 20th	Night	16% 16% 40% 22% 6%	834
	21st to end	Night	22% 17% 35% 21% 5%	592
March	1st to 10th	Night	20% 14% 35% 24% 6% 1	720
	11th to 20th	Night	19% 12% 34% 26% 8% 1	555
	21st to end	Night	24% 9% 30% 28% 7% 1	594
April	1st to 10th	Night	20% 14% 38% 23% 5%	540
	11th to 20th	Night	25% 11% 29% 28% 7%	533
	21st to end	Night	22% 10% 31% 27% 8% 1	540
May	1st to 10th	Night	20% 9% 33% 32% 6%	540
	11th to 20th	Night	18% 8% 32% 32% 10% 1	531
	21st to end	Night	16% 5% 30% 33% 14% 2	584
June	1st to 10th	Night	10% 7% 29% 41% 12% 1	540
	11th to 20th	Night	13% 5% 30% 38% 13%	540
	21st to end	Night	10% 4 25% 43% 17% 1	540
July	1st to 10th	Night	7% 2 18% 39% 30% 3	525
	11th to 20th	Night	8% 3 20% 44% 22% 3	522
	21st to end	Night	7% 2 17% 50% 23% 2	591
August	1st to 10th	Night	7% 2 16% 46% 27% 2	537
	11th to 20th	Night	12% 3 16% 37% 26% 7%	534
	21st to end	Night	12% 3 20% 40% 22% 3	594
September	1st to 10th	Night	13% 5% 23% 37% 16% 6%	540
	11th to 20th	Night	15% 3 25% 32% 21% 4	540
	21st to end	Night	13% 10% 28% 34% 14% 1	710
October	1st to 10th	Night	15% 8% 28% 28% 19% 1	720
	11th to 20th	Night	19% 13% 33% 27% 8% 1	720
	21st to end	Night	22% 11% 31% 28% 6% 1	792
November	1st to 10th	Night	17% 11% 36% 26% 9%	740
	11th to 20th	Night	17% 17% 39% 20% 6%	864
	21st to end	Night	20% 16% 33% 24% 7%	950
December	1st to 10th	Night	19% 13% 41% 22% 5% 1	950
	11th to 20th	Night	22% 13% 35% 23% 6%	950
	21st to end	Night	27% 15% 33% 21% 4	1045

Page generated at 2024-01-11 12:32:02. Version ac07

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