Kansas City
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Kansas City clear sky chart from 2005-11-06 to 2024-11-04.

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 6% 4 4 4 3 5% 7% 45%	101023
	Night	11% 8% 3 6% 4 3 4 3 5% 6% 48%	98051
Transparency	Day	21% 46% 7% 15% 10% 1	104674
	Night	21% 46% 6% 14% 11% 2	102540
Seeing	Day	15% 11% 29% 27% 13% 3	15678
	Night	15% 10% 32% 31% 11% 1	25499

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	15% 10% 4 9% 4 4 4 3 5% 7% 36%	2847
	11th to 20th	Day	11% 11% 5% 10% 5% 7% 5% 3 4 4 35%	2850
	21st to end	Day	15% 18% 5% 9% 3 3 3 2 4 5% 32%	3135
February	1st to 10th	Day	15% 12% 4 7% 6% 3 3 3 5% 6% 36%	1710
	11th to 20th	Day	13% 11% 4 7% 5% 4 4 3 5% 5% 42%	1664
	21st to end	Day	12% 9% 3 8% 4 3 4 3 5% 6% 43%	1615
March	1st to 10th	Day	14% 10% 3 6% 3 3 3 2 3 5% 47%	3436
	11th to 20th	Day	12% 7% 2 4 3 3 3 3 4 6% 52%	3480
	21st to end	Day	16% 13% 4 7% 4 4 4 3 4 7% 34%	3814
April	1st to 10th	Day	14% 8% 2 7% 4 3 4 3 5% 6% 45%	2199
	11th to 20th	Day	15% 9% 2 6% 5% 4 4 4 5% 6% 40%	2254
	21st to end	Day	20% 7% 3 7% 5% 4 4 4 5% 7% 35%	2413
May	1st to 10th	Day	16% 9% 3 6% 4 4 4 4 5% 6% 39%	4082
	11th to 20th	Day	16% 8% 2 7% 4 4 4 3 5% 7% 39%	4082
	21st to end	Day	13% 6% 2 5% 4 4 4 3 5% 8% 44%	4622
June	1st to 10th	Day	7% 4 2 5% 4 5% 5% 5% 7% 9% 48%	2660
	11th to 20th	Day	7% 5% 2 5% 4 4 5% 4 7% 9% 47%	2660
	21st to end	Day	7% 3 1 5% 5% 4 5% 4 6% 9% 52%	2660
July	1st to 10th	Day	12% 6% 2 6% 4 5% 5% 4 6% 8% 41%	4138
	11th to 20th	Day	5% 3 1 5% 4 3 4 4 7% 9% 54%	4120
	21st to end	Day	5% 4 1 5% 5% 5% 6% 5% 8% 10% 45%	4465
August	1st to 10th	Day	5% 4 1 5% 4 4 5% 4 6% 9% 53%	4104
	11th to 20th	Day	12% 5% 2 5% 4 4 4 4 5% 8% 47%	4041
	21st to end	Day	6% 5% 1 4 3 4 4 4 5% 8% 55%	4261
September	1st to 10th	Day	12% 5% 2 5% 3 3 3 3 6% 6% 53%	2280
	11th to 20th	Day	9% 5% 2 5% 5% 4 5% 3 5% 7% 50%	2114
	21st to end	Day	9% 5% 2 5% 4 3 4 3 5% 6% 55%	2074
October	1st to 10th	Day	12% 5% 2 6% 2 3 3 3 5% 6% 53%	1900
	11th to 20th	Day	12% 7% 2 4 3 3 3 2 4 5% 55%	1900
	21st to end	Day	15% 7% 2 6% 3 4 3 3 5% 7% 46%	2090
November	1st to 10th	Day	10% 6% 2 5% 3 3 3 3 5% 6% 54%	1888
	11th to 20th	Day	14% 7% 2 4 3 3 4 2 5% 5% 50%	1623
	21st to end	Day	16% 9% 3 7% 3 2 3 3 3 4 47%	1520
December	1st to 10th	Day	9% 10% 3 7% 5% 3 3 3 5% 7% 45%	1520
	11th to 20th	Day	12% 11% 4 8% 4 4 4 3 5% 6% 40%	1918
	21st to end	Day	17% 15% 7% 13% 4 4 4 3 4 5% 25%	2884
January	1st to 10th	Night	9% 9% 4 15% 6% 5% 4 2 4 5% 39%	4108
	11th to 20th	Night	11% 10% 3 9% 5% 6% 6% 4 4 4 37%	4120
	21st to end	Night	17% 13% 6% 9% 4 4 3 3 4 5% 34%	4532
February	1st to 10th	Night	12% 12% 3 7% 5% 4 4 4 5% 6% 38%	2470
	11th to 20th	Night	12% 10% 3 7% 5% 3 4 3 5% 6% 43%	2403
	21st to end	Night	13% 8% 3 7% 4 3 4 3 4 5% 46%	1854
March	1st to 10th	Night	14% 10% 3 6% 2 2 3 3 4 5% 49%	3419
	11th to 20th	Night	12% 7% 2 4 3 2 3 2 4 6% 55%	3480
	21st to end	Night	16% 10% 4 8% 5% 4 3 3 6% 6% 35%	3817
April	1st to 10th	Night	11% 7% 3 6% 3 3 4 4 4 7% 50%	1981
	11th to 20th	Night	14% 7% 3 5% 4 3 3 3 5% 6% 47%	1875
	21st to end	Night	18% 6% 2 7% 4 3 4 3 5% 6% 42%	1762
May	1st to 10th	Night	15% 7% 2 6% 4 4 4 4 6% 7% 40%	2823
	11th to 20th	Night	15% 7% 2 6% 4 3 4 4 5% 7% 43%	2823
	21st to end	Night	12% 5% 2 4 4 3 3 3 5% 6% 53%	2941
June	1st to 10th	Night	5% 3 2 3 4 4 5% 4 6% 9% 55%	1520
	11th to 20th	Night	5% 4 2 4 4 4 4 4 7% 11% 50%	1520
	21st to end	Night	4 3 1 3 3 3 4 3 7% 8% 61%	1520
July	1st to 10th	Night	10% 7% 3 5% 4 3 3 4 5% 7% 47%	2811
	11th to 20th	Night	3 2 2 3 3 3 4 3 6% 9% 62%	2850
	21st to end	Night	6% 4 2 4 3 4 5% 4 8% 10% 50%	3098
August	1st to 10th	Night	2 2 1 3 3 3 4 4 6% 11% 61%	2836
	11th to 20th	Night	12% 7% 2 5% 3 3 3 3 5% 6% 51%	2798
	21st to end	Night	4 4 1 6% 4 4 4 3 5% 7% 59%	3383
September	1st to 10th	Night	9% 5% 2 5% 3 3 3 3 5% 6% 57%	1900
	11th to 20th	Night	8% 4 2 4 3 3 4 4 6% 7% 55%	2061
	21st to end	Night	7% 4 2 5% 3 4 3 3 4 6% 58%	2090
October	1st to 10th	Night	11% 5% 2 4 3 3 3 3 4 5% 58%	2276
	11th to 20th	Night	13% 6% 1 4 3 3 2 2 4 5% 57%	2280
	21st to end	Night	15% 7% 3 4 3 3 3 2 3 5% 51%	2508
November	1st to 10th	Night	9% 4 2 4 3 3 3 2 5% 6% 61%	2263
	11th to 20th	Night	11% 6% 1 5% 4 3 3 3 4 6% 54%	2552
	21st to end	Night	14% 9% 2 5% 3 3 3 2 4 5% 50%	2660
December	1st to 10th	Night	11% 8% 3 5% 4 4 4 4 5% 6% 45%	2660
	11th to 20th	Night	12% 9% 3 6% 4 3 3 3 5% 6% 45%	3279
	21st to end	Night	20% 19% 5% 9% 4 3 3 3 3 3 28%	4778

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	35% 36% 7% 16% 6%	2848
	11th to 20th	Day	39% 36% 8% 12% 6%	2850
	21st to end	Day	37% 38% 4 10% 10%	3135
February	1st to 10th	Day	19% 65% 6% 6% 4 1	1710
	11th to 20th	Day	16% 63% 5% 8% 7% 1	1673
	21st to end	Day	16% 64% 3 6% 8% 2	1615
March	1st to 10th	Day	25% 39% 5% 12% 17% 1	3436
	11th to 20th	Day	14% 39% 9% 19% 16% 2	3480
	21st to end	Day	31% 40% 9% 17% 3	3814
April	1st to 10th	Day	16% 65% 5% 8% 6% 1	2199
	11th to 20th	Day	14% 66% 5% 8% 6%	2254
	21st to end	Day	18% 65% 3 9% 5%	2413
May	1st to 10th	Day	27% 39% 6% 17% 9% 1	4120
	11th to 20th	Day	28% 39% 9% 15% 8%	4086
	21st to end	Day	22% 39% 4 25% 9% 1	4635
June	1st to 10th	Day	10% 66% 5% 10% 7% 2	2660
	11th to 20th	Day	12% 66% 6% 12% 5%	2660
	21st to end	Day	11% 65% 7% 12% 5% 1	2660
July	1st to 10th	Day	28% 38% 9% 13% 10% 2	4074
	11th to 20th	Day	16% 38% 7% 28% 10% 1	4051
	21st to end	Day	16% 39% 13% 22% 8% 1	4325
August	1st to 10th	Day	17% 39% 8% 20% 15% 1	4090
	11th to 20th	Day	24% 39% 13% 15% 10%	4080
	21st to end	Day	18% 38% 11% 23% 7% 2	4260
September	1st to 10th	Day	11% 60% 6% 12% 9% 2	2280
	11th to 20th	Day	12% 60% 6% 13% 9% 1	2114
	21st to end	Day	15% 60% 4 12% 9% 1	2074
October	1st to 10th	Day	10% 36% 3 11% 34% 6%	3160
	11th to 20th	Day	8% 36% 1 16% 31% 8%	3140
	21st to end	Day	19% 37% 5% 18% 19% 2	3428
November	1st to 10th	Day	16% 58% 5% 11% 8% 2	1888
	11th to 20th	Day	16% 60% 3 10% 9% 2	1623
	21st to end	Day	19% 59% 3 11% 8%	1520
December	1st to 10th	Day	16% 60% 6% 11% 7% 1	1520
	11th to 20th	Day	24% 47% 7% 16% 5% 1	1915
	21st to end	Day	49% 36% 5% 7% 3 1	2884
January	1st to 10th	Night	38% 35% 8% 12% 6% 1	4108
	11th to 20th	Night	38% 36% 7% 12% 7% 1	4120
	21st to end	Night	38% 38% 7% 10% 6%	4532
February	1st to 10th	Night	17% 65% 5% 8% 4 1	2470
	11th to 20th	Night	17% 63% 4 9% 6%	2404
	21st to end	Night	15% 65% 3 7% 8% 3	1854
March	1st to 10th	Night	26% 40% 5% 14% 14% 1	3419
	11th to 20th	Night	15% 39% 4 19% 20% 4	3480
	21st to end	Night	30% 39% 11% 16% 4 1	3817
April	1st to 10th	Night	14% 66% 4 8% 7% 1	1981
	11th to 20th	Night	14% 66% 4 11% 5% 1	1875
	21st to end	Night	16% 65% 4 9% 6% 1	1762
May	1st to 10th	Night	27% 40% 9% 13% 10% 1	2850
	11th to 20th	Night	27% 39% 8% 19% 7%	2824
	21st to end	Night	20% 39% 4 20% 16%	2949
June	1st to 10th	Night	8% 65% 7% 11% 8% 1	1520
	11th to 20th	Night	10% 66% 4 11% 8% 1	1520
	21st to end	Night	6% 64% 8% 16% 6%	1520
July	1st to 10th	Night	28% 36% 7% 13% 14% 3	2766
	11th to 20th	Night	11% 37% 9% 28% 13% 1	2796
	21st to end	Night	16% 37% 16% 23% 7%	2999
August	1st to 10th	Night	10% 39% 14% 17% 18% 3	2826
	11th to 20th	Night	24% 38% 8% 18% 12% 1	2825
	21st to end	Night	18% 38% 10% 25% 8% 1	3383
September	1st to 10th	Night	11% 60% 5% 11% 9% 3	1900
	11th to 20th	Night	9% 60% 5% 13% 12% 2	2061
	21st to end	Night	14% 60% 3 12% 10% 1	2090
October	1st to 10th	Night	11% 36% 3 10% 35% 5%	3796
	11th to 20th	Night	9% 36% 2 18% 25% 10%	3779
	21st to end	Night	21% 37% 4 21% 17% 1	4120
November	1st to 10th	Night	13% 57% 5% 11% 11% 2	2263
	11th to 20th	Night	13% 59% 4 10% 12% 2	2552
	21st to end	Night	18% 59% 3 11% 9%	2660
December	1st to 10th	Night	15% 60% 4 10% 10%	2660
	11th to 20th	Night	19% 48% 4 18% 9% 1	3281
	21st to end	Night	47% 36% 2 9% 5% 1	4778

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% 18% 35% 19% 4	270
	11th to 20th	Day	29% 19% 37% 13% 1	270
	21st to end	Day	18% 20% 44% 16% 2	297
February	1st to 10th	Day	24% 24% 37% 13% 1	270
	11th to 20th	Day	21% 23% 39% 12% 6%	270
	21st to end	Day	20% 27% 37% 13% 3	225
March	1st to 10th	Day	16% 25% 44% 13% 1	270
	11th to 20th	Day	31% 16% 33% 17% 2	270
	21st to end	Day	37% 21% 29% 10% 2 1	297
April	1st to 10th	Day	25% 18% 35% 17% 5%	379
	11th to 20th	Day	21% 18% 35% 19% 6%	452
	21st to end	Day	24% 18% 34% 17% 7%	593
May	1st to 10th	Day	22% 15% 36% 19% 7%	653
	11th to 20th	Day	21% 12% 28% 27% 11% 2	675
	21st to end	Day	18% 11% 30% 23% 15% 3	734
June	1st to 10th	Day	6% 5% 25% 35% 23% 6%	680
	11th to 20th	Day	8% 5% 28% 38% 18% 4	680
	21st to end	Day	7% 7% 37% 36% 11% 1	680
July	1st to 10th	Day	11% 4 18% 33% 26% 8%	671
	11th to 20th	Day	7% 2 24% 40% 23% 6%	668
	21st to end	Day	9% 2 19% 39% 25% 6%	739
August	1st to 10th	Day	7% 3 22% 39% 25% 4	676
	11th to 20th	Day	9% 5% 19% 39% 23% 5%	665
	21st to end	Day	9% 2 18% 33% 30% 7%	594
September	1st to 10th	Day	12% 4 18% 39% 22% 5%	490
	11th to 20th	Day	6% 4 23% 41% 20% 5%	324
	21st to end	Day	12% 10% 28% 34% 11% 5%	300
October	1st to 10th	Day	15% 7% 31% 27% 15% 5%	300
	11th to 20th	Day	12% 22% 40% 20% 5% 1	300
	21st to end	Day	21% 23% 33% 19% 4	330
November	1st to 10th	Day	16% 14% 38% 23% 8% 1	279
	11th to 20th	Day	19% 19% 34% 20% 6% 1	270
	21st to end	Day	26% 15% 31% 22% 6%	270
December	1st to 10th	Day	12% 18% 40% 23% 6% 3	270
	11th to 20th	Day	20% 22% 34% 18% 5%	270
	21st to end	Day	22% 26% 37% 14% 1	297
January	1st to 10th	Night	13% 16% 38% 27% 6%	950
	11th to 20th	Night	18% 16% 37% 23% 5% 1	950
	21st to end	Night	15% 14% 40% 27% 3	1045
February	1st to 10th	Night	18% 15% 42% 21% 3	950
	11th to 20th	Night	18% 16% 37% 26% 3	929
	21st to end	Night	20% 15% 42% 19% 4 1	598
March	1st to 10th	Night	17% 13% 41% 25% 4	570
	11th to 20th	Night	23% 10% 35% 25% 6%	570
	21st to end	Night	28% 14% 34% 21% 3	627
April	1st to 10th	Night	13% 16% 40% 27% 4	570
	11th to 20th	Night	20% 15% 33% 27% 5%	563
	21st to end	Night	21% 13% 36% 25% 6% 1	570
May	1st to 10th	Night	19% 9% 36% 29% 6% 1	570
	11th to 20th	Night	16% 8% 28% 35% 13% 1	561
	21st to end	Night	12% 7% 30% 36% 13% 2	617
June	1st to 10th	Night	6% 4 22% 44% 22% 1	570
	11th to 20th	Night	6% 4 29% 44% 15% 1	570
	21st to end	Night	6% 3 35% 42% 13% 1	570
July	1st to 10th	Night	8% 1 15% 45% 27% 3	555
	11th to 20th	Night	4 2 21% 45% 27% 2	552
	21st to end	Night	8% 2 15% 46% 28% 1	624
August	1st to 10th	Night	5% 2 19% 48% 26% 1	567
	11th to 20th	Night	9% 2 17% 41% 28% 2	564
	21st to end	Night	7% 1 17% 42% 31% 2	627
September	1st to 10th	Night	12% 2 17% 43% 22% 3	570
	11th to 20th	Night	10% 3 22% 40% 22% 3	570
	21st to end	Night	9% 5% 23% 43% 18% 2	570
October	1st to 10th	Night	13% 6% 29% 32% 18% 2	756
	11th to 20th	Night	16% 11% 38% 28% 7%	760
	21st to end	Night	20% 13% 32% 28% 7%	836
November	1st to 10th	Night	12% 10% 36% 32% 10% 1	755
	11th to 20th	Night	15% 16% 35% 27% 8%	948
	21st to end	Night	19% 13% 35% 28% 5%	950
December	1st to 10th	Night	16% 14% 36% 27% 6% 1	950
	11th to 20th	Night	20% 11% 37% 27% 5%	950
	21st to end	Night	22% 17% 35% 23% 3	1045

Page generated at 2024-11-01 21:47:48. Version ac07

Copyright © 2024 Attilla Danko.