Kenosha
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Kenosha clear sky chart from 2005-11-06 to 2026-07-16.

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	12% 8% 3 8% 5% 5% 5% 4 6% 7% 38%	137915
	Night	13% 9% 3 8% 5% 4 4 4 5% 7% 37%	135061
Transparency	Day	44% 5% 13% 24% 13% 2	141428
	Night	47% 3 13% 23% 13% 2	139612
Seeing	Day	15% 7% 24% 31% 19% 5%	18184
	Night	18% 8% 27% 29% 16% 3	28014

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	12% 12% 6% 12% 5% 6% 5% 4 6% 6% 26%	4691
	11th to 20th	Day	8% 10% 5% 11% 5% 5% 6% 7% 7% 6% 30%	4710
	21st to end	Day	12% 14% 6% 9% 5% 4 4 3 5% 7% 33%	5190
February	1st to 10th	Day	12% 13% 5% 9% 6% 5% 4 5% 7% 7% 27%	1929
	11th to 20th	Day	13% 11% 4 8% 5% 5% 5% 4 5% 6% 35%	2048
	21st to end	Day	11% 13% 4 11% 7% 6% 5% 3 6% 6% 29%	1730
March	1st to 10th	Day	13% 10% 3 7% 4 4 3 3 4 6% 43%	4580
	11th to 20th	Day	11% 6% 2 6% 5% 5% 5% 4 6% 8% 41%	4754
	21st to end	Day	18% 12% 6% 10% 6% 5% 5% 4 5% 5% 24%	6099
April	1st to 10th	Day	16% 11% 3 8% 5% 5% 5% 3 6% 5% 32%	2520
	11th to 20th	Day	14% 8% 3 8% 5% 5% 5% 4 6% 7% 36%	2494
	21st to end	Day	16% 9% 2 7% 5% 5% 5% 4 5% 7% 35%	2667
May	1st to 10th	Day	13% 8% 3 7% 5% 5% 5% 4 6% 7% 37%	7616
	11th to 20th	Day	12% 7% 3 8% 5% 5% 5% 4 6% 7% 37%	8079
	21st to end	Day	14% 6% 2 6% 4 4 4 4 6% 8% 42%	9047
June	1st to 10th	Day	9% 6% 3 6% 5% 4 4 4 6% 8% 44%	2940
	11th to 20th	Day	11% 5% 2 6% 4 5% 4 4 6% 9% 44%	2940
	21st to end	Day	9% 6% 3 7% 5% 5% 5% 4 7% 8% 42%	2940
July	1st to 10th	Day	10% 6% 3 7% 4 5% 5% 5% 7% 10% 39%	6500
	11th to 20th	Day	7% 5% 2 6% 4 4 5% 4 7% 10% 47%	6431
	21st to end	Day	8% 6% 2 7% 5% 4 5% 4 6% 9% 43%	6924
August	1st to 10th	Day	10% 5% 2 6% 4 4 4 4 7% 9% 45%	4478
	11th to 20th	Day	9% 5% 2 5% 4 4 4 3 6% 9% 50%	3945
	21st to end	Day	6% 5% 2 7% 5% 4 4 4 6% 8% 49%	4312
September	1st to 10th	Day	12% 5% 2 5% 4 4 4 4 7% 7% 47%	2400
	11th to 20th	Day	11% 4 1 4 3 3 4 3 5% 7% 53%	2263
	21st to end	Day	11% 5% 3 7% 5% 4 4 4 7% 9% 42%	2200
October	1st to 10th	Day	12% 6% 2 7% 4 4 3 3 4 8% 46%	2157
	11th to 20th	Day	17% 8% 3 8% 5% 5% 5% 3 6% 7% 33%	1960
	21st to end	Day	18% 8% 2 6% 4 5% 4 4 4 7% 37%	1980
November	1st to 10th	Day	11% 10% 3 7% 5% 4 4 3 6% 7% 42%	1852
	11th to 20th	Day	14% 11% 3 9% 5% 5% 4 3 6% 8% 31%	1890
	21st to end	Day	18% 11% 3 8% 4 4 4 3 4 5% 34%	1801
December	1st to 10th	Day	9% 9% 4 7% 6% 6% 6% 4 7% 7% 35%	2690
	11th to 20th	Day	12% 14% 5% 10% 6% 6% 6% 4 6% 7% 24%	3088
	21st to end	Day	21% 21% 8% 11% 6% 4 4 3 3 4 14%	4070
January	1st to 10th	Night	12% 12% 7% 12% 6% 4 4 3 5% 5% 31%	8232
	11th to 20th	Night	11% 14% 6% 12% 7% 7% 6% 6% 6% 5% 22%	8280
	21st to end	Night	13% 14% 5% 9% 5% 4 4 3 5% 6% 31%	9021
February	1st to 10th	Night	14% 14% 4 9% 5% 5% 4 4 5% 6% 31%	2689
	11th to 20th	Night	13% 10% 3 7% 5% 4 5% 4 5% 6% 37%	2458
	21st to end	Night	18% 11% 3 7% 5% 4 4 2 4 5% 37%	2076
March	1st to 10th	Night	15% 9% 3 7% 4 4 4 3 5% 6% 42%	5493
	11th to 20th	Night	10% 7% 2 6% 4 4 4 3 6% 9% 46%	5466
	21st to end	Night	18% 12% 5% 10% 5% 5% 4 4 4 5% 29%	5072
April	1st to 10th	Night	17% 9% 2 6% 5% 5% 5% 4 6% 6% 37%	2100
	11th to 20th	Night	19% 8% 3 8% 4 5% 4 3 3 5% 38%	2075
	21st to end	Night	18% 7% 2 6% 4 5% 4 3 5% 7% 39%	1952
May	1st to 10th	Night	15% 7% 3 7% 4 4 5% 3 6% 8% 39%	5237
	11th to 20th	Night	11% 7% 4 6% 4 4 4 3 6% 8% 42%	4791
	21st to end	Night	14% 6% 2 7% 5% 4 4 3 5% 6% 43%	5139
June	1st to 10th	Night	8% 6% 2 6% 4 4 5% 4 6% 9% 46%	1680
	11th to 20th	Night	11% 5% 2 6% 4 4 5% 4 6% 9% 43%	1680
	21st to end	Night	9% 6% 2 7% 5% 5% 5% 3 7% 8% 43%	1680
July	1st to 10th	Night	10% 5% 2 8% 5% 5% 5% 4 6% 8% 42%	3698
	11th to 20th	Night	7% 5% 2 6% 4 4 5% 4 6% 9% 50%	3657
	21st to end	Night	8% 5% 2 5% 5% 4 5% 4 7% 8% 47%	3947
August	1st to 10th	Night	10% 4 1 5% 3 3 4 4 6% 8% 51%	2677
	11th to 20th	Night	10% 4 2 5% 3 4 4 3 5% 9% 51%	3100
	21st to end	Night	8% 4 1 5% 4 4 4 3 5% 9% 51%	3586
September	1st to 10th	Night	9% 5% 2 5% 3 3 4 3 6% 7% 52%	2000
	11th to 20th	Night	10% 3 2 4 3 3 3 3 5% 7% 55%	2115
	21st to end	Night	13% 6% 2 7% 4 5% 4 3 5% 7% 46%	2200
October	1st to 10th	Night	13% 5% 2 6% 4 4 4 4 4 6% 50%	2240
	11th to 20th	Night	17% 8% 3 6% 4 3 4 3 5% 6% 41%	2440
	21st to end	Night	20% 7% 2 6% 4 4 4 3 5% 8% 37%	2860
November	1st to 10th	Night	13% 8% 3 6% 5% 4 3 3 5% 7% 44%	2666
	11th to 20th	Night	14% 12% 4 8% 4 4 4 4 5% 7% 35%	2730
	21st to end	Night	17% 10% 4 8% 5% 5% 4 3 5% 6% 34%	2815
December	1st to 10th	Night	11% 11% 3 8% 5% 5% 5% 4 4 6% 38%	4720
	11th to 20th	Night	17% 14% 4 9% 6% 5% 4 4 5% 6% 26%	5339
	21st to end	Night	23% 18% 5% 10% 5% 5% 4 3 4 5% 18%	7150

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	59% 5% 18% 14% 4	4692
	11th to 20th	Day	52% 2 20% 16% 8% 1	4710
	21st to end	Day	53% 3 13% 21% 10%	5190
February	1st to 10th	Day	55% 5% 13% 19% 7% 1	1929
	11th to 20th	Day	50% 4 11% 24% 9% 2	2058
	21st to end	Day	55% 4 11% 18% 10% 2	1730
March	1st to 10th	Day	44% 3 13% 24% 12% 4	4580
	11th to 20th	Day	41% 4 15% 27% 12% 1	4754
	21st to end	Day	61% 5% 13% 14% 7% 1	6101
April	1st to 10th	Day	52% 6% 10% 21% 11%	2520
	11th to 20th	Day	47% 5% 11% 22% 12% 3	2494
	21st to end	Day	48% 6% 12% 20% 11% 2	2667
May	1st to 10th	Day	43% 5% 11% 26% 13% 2	7651
	11th to 20th	Day	44% 5% 11% 24% 16% 1	8083
	21st to end	Day	39% 4 11% 25% 17% 4	9061
June	1st to 10th	Day	37% 4 13% 25% 18% 2	2940
	11th to 20th	Day	35% 6% 14% 24% 19% 2	2940
	21st to end	Day	37% 7% 13% 25% 15% 2	2940
July	1st to 10th	Day	39% 6% 13% 28% 13% 2	6431
	11th to 20th	Day	31% 6% 15% 31% 16% 1	6356
	21st to end	Day	36% 6% 16% 22% 17% 2	6728
August	1st to 10th	Day	34% 5% 17% 30% 14% 1	4463
	11th to 20th	Day	32% 5% 13% 35% 14% 1	3984
	21st to end	Day	32% 6% 13% 27% 20% 2	4311
September	1st to 10th	Day	35% 6% 13% 28% 17% 2	2400
	11th to 20th	Day	30% 5% 13% 33% 17% 2	2263
	21st to end	Day	37% 6% 12% 28% 16% 1	2200
October	1st to 10th	Day	26% 3 8% 41% 21% 1	3508
	11th to 20th	Day	39% 3 13% 27% 18% 1	3176
	21st to end	Day	43% 3 10% 28% 12% 3	3180
November	1st to 10th	Day	42% 4 15% 22% 15% 1	1852
	11th to 20th	Day	53% 4 15% 20% 8% 1	1890
	21st to end	Day	54% 4 14% 22% 7%	1801
December	1st to 10th	Day	48% 3 23% 20% 5%	2690
	11th to 20th	Day	60% 4 14% 16% 6%	3085
	21st to end	Day	75% 2 8% 11% 4	4070
January	1st to 10th	Night	57% 2 14% 20% 6%	8233
	11th to 20th	Night	64% 2 17% 10% 7%	8280
	21st to end	Night	54% 3 17% 18% 7%	9021
February	1st to 10th	Night	55% 3 12% 19% 10% 1	2689
	11th to 20th	Night	48% 3 12% 24% 12% 1	2459
	21st to end	Night	51% 2 12% 22% 10% 3	2076
March	1st to 10th	Night	45% 2 14% 25% 11% 3	5493
	11th to 20th	Night	37% 3 12% 31% 14% 3	5466
	21st to end	Night	59% 3 10% 17% 11% 1	5072
April	1st to 10th	Night	48% 4 12% 21% 14% 1	2100
	11th to 20th	Night	49% 4 8% 19% 17% 4	2075
	21st to end	Night	45% 4 12% 22% 15% 2	1952
May	1st to 10th	Night	44% 4 11% 24% 15% 3	5264
	11th to 20th	Night	41% 4 14% 24% 16% 3	4792
	21st to end	Night	43% 3 8% 21% 19% 6%	5149
June	1st to 10th	Night	35% 5% 12% 27% 19% 3	1680
	11th to 20th	Night	37% 5% 10% 25% 21% 2	1680
	21st to end	Night	38% 6% 15% 24% 15% 2	1680
July	1st to 10th	Night	40% 5% 13% 28% 11% 4	3660
	11th to 20th	Night	31% 5% 14% 30% 18% 2	3612
	21st to end	Night	33% 5% 14% 23% 22% 2	3832
August	1st to 10th	Night	31% 5% 15% 29% 19% 2	2668
	11th to 20th	Night	31% 5% 12% 34% 17% 1	3127
	21st to end	Night	30% 5% 12% 30% 20% 3	3586
September	1st to 10th	Night	31% 6% 12% 28% 21% 2	2000
	11th to 20th	Night	29% 4 9% 36% 21% 2	2115
	21st to end	Night	40% 3 9% 30% 16% 1	2200
October	1st to 10th	Night	25% 3 7% 38% 25% 1	3656
	11th to 20th	Night	39% 2 12% 22% 23% 2	3963
	21st to end	Night	42% 4 11% 25% 17% 2	4610
November	1st to 10th	Night	42% 3 11% 24% 16% 2	2666
	11th to 20th	Night	50% 3 14% 21% 10% 2	2730
	21st to end	Night	52% 3 14% 23% 7%	2815
December	1st to 10th	Night	49% 3 17% 23% 6% 2	4720
	11th to 20th	Night	60% 3 14% 15% 7% 1	5341
	21st to end	Night	70% 2 10% 12% 4	7150

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	19% 10% 33% 28% 9% 1	330
	11th to 20th	Day	18% 14% 38% 22% 7% 1	330
	21st to end	Day	19% 8% 38% 27% 7% 1	363
February	1st to 10th	Day	13% 15% 39% 25% 7%	330
	11th to 20th	Day	18% 16% 33% 26% 7% 1	330
	21st to end	Day	16% 14% 44% 21% 4	273
March	1st to 10th	Day	17% 10% 41% 26% 5%	330
	11th to 20th	Day	20% 14% 32% 26% 8% 1	370
	21st to end	Day	22% 11% 31% 27% 8% 1	594
April	1st to 10th	Day	20% 11% 30% 32% 7%	540
	11th to 20th	Day	17% 10% 36% 24% 9% 4	532
	21st to end	Day	18% 9% 29% 27% 15% 2	540
May	1st to 10th	Day	18% 4 31% 33% 12% 2	543
	11th to 20th	Day	17% 4 25% 36% 15% 4	721
	21st to end	Day	15% 2 23% 32% 22% 7%	844
June	1st to 10th	Day	10% 3 19% 39% 24% 5%	780
	11th to 20th	Day	13% 3 16% 40% 23% 6%	780
	21st to end	Day	10% 3 18% 39% 27% 4	780
July	1st to 10th	Day	7% 2 10% 33% 36% 12%	771
	11th to 20th	Day	10% 1 15% 35% 30% 9%	744
	21st to end	Day	8% 1 14% 42% 29% 7%	794
August	1st to 10th	Day	7% 3 10% 36% 34% 10%	680
	11th to 20th	Day	10% 3 12% 32% 32% 11%	519
	21st to end	Day	8% 2 14% 33% 32% 11%	583
September	1st to 10th	Day	12% 5% 18% 30% 24% 11%	530
	11th to 20th	Day	9% 2 13% 30% 30% 15%	530
	21st to end	Day	15% 5% 21% 27% 21% 11%	530
October	1st to 10th	Day	16% 6% 23% 27% 23% 6%	487
	11th to 20th	Day	22% 11% 27% 25% 12% 3	330
	21st to end	Day	23% 10% 26% 29% 10% 1	363
November	1st to 10th	Day	13% 10% 35% 27% 14% 2	330
	11th to 20th	Day	20% 15% 36% 19% 9%	330
	21st to end	Day	24% 8% 37% 26% 5%	330
December	1st to 10th	Day	17% 15% 37% 21% 10% 1	330
	11th to 20th	Day	18% 14% 38% 22% 8%	330
	21st to end	Day	27% 14% 34% 21% 3 1	363
January	1st to 10th	Night	19% 14% 37% 24% 5%	1050
	11th to 20th	Night	21% 14% 37% 22% 5% 1	1050
	21st to end	Night	20% 10% 39% 26% 5%	1155
February	1st to 10th	Night	21% 9% 37% 26% 7%	1009
	11th to 20th	Night	20% 13% 36% 26% 6%	823
	21st to end	Night	25% 9% 36% 25% 4 1	692
March	1st to 10th	Night	18% 8% 35% 29% 9% 1	840
	11th to 20th	Night	15% 9% 34% 31% 10% 1	840
	21st to end	Night	23% 6% 29% 30% 11% 1	693
April	1st to 10th	Night	21% 7% 32% 30% 9%	630
	11th to 20th	Night	22% 6% 27% 29% 13% 2	623
	21st to end	Night	22% 6% 20% 35% 16% 1	630
May	1st to 10th	Night	18% 4 23% 38% 15% 1	630
	11th to 20th	Night	18% 2 20% 33% 23% 3	621
	21st to end	Night	14% 3 15% 34% 28% 6%	683
June	1st to 10th	Night	10% 3 13% 43% 27% 4	630
	11th to 20th	Night	13% 3 17% 40% 25% 3	630
	21st to end	Night	10% 3 15% 39% 31% 3	630
July	1st to 10th	Night	8% 2 8% 34% 37% 11%	615
	11th to 20th	Night	8% 3 10% 38% 33% 9%	597
	21st to end	Night	7% 1 10% 40% 37% 4	657
August	1st to 10th	Night	8% 1 9% 38% 36% 8%	597
	11th to 20th	Night	9% 2 11% 31% 37% 9%	594
	21st to end	Night	8% 2 12% 34% 35% 8%	660
September	1st to 10th	Night	12% 3 15% 33% 29% 9%	600
	11th to 20th	Night	11% 4 14% 27% 32% 13%	715
	21st to end	Night	15% 6% 19% 27% 24% 9%	800
October	1st to 10th	Night	15% 5% 22% 31% 24% 4	800
	11th to 20th	Night	20% 10% 30% 27% 13% 1	800
	21st to end	Night	24% 9% 28% 27% 11% 1	880
November	1st to 10th	Night	17% 11% 35% 24% 12% 1	820
	11th to 20th	Night	22% 16% 33% 21% 7% 1	840
	21st to end	Night	23% 12% 35% 23% 7%	925
December	1st to 10th	Night	22% 15% 35% 22% 5%	1050
	11th to 20th	Night	24% 11% 38% 22% 5%	1050
	21st to end	Night	31% 12% 33% 20% 3	1155

Page generated at 2026-07-13 02:14:52. Version ac07

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