Raymore-Peculiar High School
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Raymore-Peculiar High School clear sky chart from 2005-11-06 to 2024-03-06.

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% 7% 3 6% 5% 3 4 4 5% 7% 44%	78665
	Night	12% 7% 3 5% 4 3 4 4 5% 6% 47%	80898
Transparency	Day	40% 5% 13% 25% 15% 2	78388
	Night	38% 4 11% 26% 17% 3	80695
Seeing	Day	15% 9% 27% 28% 17% 4	14642
	Night	15% 8% 31% 32% 13% 1	24707

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% 8% 3 8% 5% 3 4 4 5% 5% 38%	2847
	11th to 20th	Day	11% 10% 4 7% 7% 5% 7% 3 3 4 38%	2850
	21st to end	Day	15% 16% 5% 7% 4 3 4 3 3 6% 34%	3135
February	1st to 10th	Day	16% 9% 6% 6% 4 3 5% 4 4 6% 38%	1710
	11th to 20th	Day	13% 8% 4 7% 5% 4 4 4 4 7% 41%	1664
	21st to end	Day	11% 9% 3 7% 5% 2 4 4 5% 8% 43%	1625
March	1st to 10th	Day	11% 8% 4 8% 5% 3 5% 4 5% 6% 42%	2035
	11th to 20th	Day	21% 9% 4 5% 5% 2 4 3 4 7% 35%	1980
	21st to end	Day	21% 11% 4 6% 5% 3 4 4 5% 5% 32%	2178
April	1st to 10th	Day	13% 7% 3 5% 4 3 4 4 5% 7% 44%	2088
	11th to 20th	Day	14% 9% 3 6% 5% 3 4 5% 5% 6% 40%	2134
	21st to end	Day	19% 8% 3 7% 6% 3 5% 4 3 6% 36%	2262
May	1st to 10th	Day	18% 8% 3 6% 6% 3 5% 4 4 7% 35%	2340
	11th to 20th	Day	16% 7% 3 6% 4 3 5% 5% 5% 7% 39%	2302
	21st to end	Day	14% 7% 3 6% 6% 4 6% 5% 6% 8% 35%	2596
June	1st to 10th	Day	7% 3 2 4 4 3 5% 6% 7% 10% 49%	2520
	11th to 20th	Day	7% 5% 2 5% 5% 3 5% 5% 6% 9% 47%	2520
	21st to end	Day	6% 3 2 5% 4 3 5% 5% 6% 9% 52%	2520
July	1st to 10th	Day	9% 5% 2 5% 5% 3 4 5% 7% 10% 45%	2342
	11th to 20th	Day	4 2 1 4 4 3 5% 6% 6% 10% 54%	2340
	21st to end	Day	8% 5% 2 5% 4 4 6% 6% 7% 9% 43%	2546
August	1st to 10th	Day	8% 3 2 6% 5% 3 5% 5% 6% 11% 45%	2328
	11th to 20th	Day	8% 4 2 4 5% 3 4 5% 7% 9% 49%	2301
	21st to end	Day	7% 4 2 5% 4 3 4 5% 6% 9% 52%	2412
September	1st to 10th	Day	12% 5% 2 4 3 2 3 5% 4 8% 51%	2160
	11th to 20th	Day	9% 4 1 4 5% 3 5% 5% 5% 7% 51%	2013
	21st to end	Day	8% 4 1 4 4 3 4 4 5% 7% 55%	1958
October	1st to 10th	Day	12% 6% 2 4 4 2 2 3 6% 8% 51%	1800
	11th to 20th	Day	13% 6% 2 4 3 2 3 3 4 6% 55%	1800
	21st to end	Day	16% 7% 3 5% 5% 2 3 3 4 6% 47%	1980
November	1st to 10th	Day	9% 6% 2 5% 4 2 3 4 4 6% 55%	1858
	11th to 20th	Day	15% 6% 3 5% 3 1 3 4 4 6% 51%	1652
	21st to end	Day	15% 8% 3 5% 3 2 4 3 3 4 49%	1520
December	1st to 10th	Day	10% 8% 3 5% 6% 3 3 3 5% 7% 46%	1520
	11th to 20th	Day	12% 9% 4 7% 5% 3 4 4 4 6% 42%	1918
	21st to end	Day	16% 13% 7% 11% 6% 2 4 4 4 5% 27%	2911
January	1st to 10th	Night	9% 9% 3 12% 6% 3 4 3 3 5% 42%	4108
	11th to 20th	Night	11% 10% 3 7% 7% 5% 8% 5% 4 5% 37%	4120
	21st to end	Night	17% 12% 5% 9% 4 2 3 4 3 5% 36%	4532
February	1st to 10th	Night	13% 9% 4 7% 6% 3 5% 4 5% 7% 39%	2470
	11th to 20th	Night	12% 8% 4 6% 5% 3 4 4 5% 7% 43%	2403
	21st to end	Night	13% 8% 2 6% 5% 3 4 3 4 5% 47%	1845
March	1st to 10th	Night	11% 8% 3 5% 3 2 4 4 4 6% 49%	2041
	11th to 20th	Night	16% 8% 3 6% 4 3 4 3 5% 6% 41%	1980
	21st to end	Night	20% 10% 3 6% 5% 3 4 4 4 7% 33%	2178
April	1st to 10th	Night	11% 6% 3 4 4 2 4 3 5% 6% 50%	1872
	11th to 20th	Night	14% 7% 4 6% 5% 2 3 3 5% 6% 46%	1775
	21st to end	Night	17% 6% 3 6% 5% 3 4 4 5% 5% 44%	1694
May	1st to 10th	Night	15% 7% 3 5% 4 3 5% 5% 5% 7% 40%	1620
	11th to 20th	Night	13% 6% 2 4 4 2 3 4 5% 7% 49%	1593
	21st to end	Night	11% 5% 3 6% 5% 2 5% 4 7% 8% 44%	1675
June	1st to 10th	Night	5% 3 1 3 3 3 5% 4 7% 10% 56%	1440
	11th to 20th	Night	5% 3 2 5% 4 3 4 5% 6% 10% 51%	1440
	21st to end	Night	4 2 1 2 4 3 4 5% 5% 9% 61%	1440
July	1st to 10th	Night	7% 3 2 4 4 3 5% 5% 7% 11% 50%	1611
	11th to 20th	Night	3 3 2 4 3 2 5% 4 6% 11% 59%	1620
	21st to end	Night	6% 3 2 4 4 3 4 6% 7% 9% 50%	1772
August	1st to 10th	Night	4 2 1 4 4 3 5% 6% 5% 9% 56%	1611
	11th to 20th	Night	7% 4 2 4 3 3 4 4 6% 7% 57%	1600
	21st to end	Night	5% 3 2 4 4 2 4 3 6% 8% 60%	1942
September	1st to 10th	Night	11% 5% 2 5% 4 2 3 4 4 6% 56%	1800
	11th to 20th	Night	9% 5% 2 4 4 2 3 5% 6% 6% 55%	1944
	21st to end	Night	7% 3 1 4 5% 3 4 4 5% 7% 58%	1984
October	1st to 10th	Night	10% 5% 2 3 4 2 4 4 4 6% 57%	2160
	11th to 20th	Night	12% 5% 2 4 4 2 3 3 3 5% 56%	2160
	21st to end	Night	16% 7% 2 4 3 2 3 3 3 5% 51%	2376
November	1st to 10th	Night	10% 4 2 3 4 2 3 3 3 6% 61%	2220
	11th to 20th	Night	10% 6% 3 4 4 2 3 4 4 7% 53%	2521
	21st to end	Night	15% 6% 3 4 3 2 3 3 4 5% 51%	2660
December	1st to 10th	Night	13% 7% 3 5% 5% 2 4 4 5% 7% 46%	2660
	11th to 20th	Night	12% 7% 3 6% 4 3 4 4 4 7% 45%	3279
	21st to end	Night	19% 16% 6% 8% 5% 3 3 4 3 4 29%	4752

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	48% 3 10% 26% 13% 1	2848
	11th to 20th	Day	51% 2 12% 22% 12%	2850
	21st to end	Day	53% 3 11% 17% 16% 1	3135
February	1st to 10th	Day	49% 4 11% 22% 11% 2	1710
	11th to 20th	Day	45% 4 12% 21% 15% 2	1673
	21st to end	Day	41% 3 11% 24% 16% 4	1625
March	1st to 10th	Day	45% 3 11% 22% 15% 4	2035
	11th to 20th	Day	50% 5% 9% 22% 12% 2	1980
	21st to end	Day	55% 4 14% 18% 8% 1	2178
April	1st to 10th	Day	41% 5% 13% 24% 16% 1	2088
	11th to 20th	Day	45% 4 13% 23% 14% 1	2134
	21st to end	Day	50% 4 10% 23% 11% 1	2262
May	1st to 10th	Day	50% 6% 10% 21% 12% 1	2340
	11th to 20th	Day	45% 6% 13% 24% 13%	2306
	21st to end	Day	46% 7% 14% 21% 10% 2	2596
June	1st to 10th	Day	29% 6% 18% 31% 15% 1	2520
	11th to 20th	Day	32% 6% 14% 30% 16% 2	2520
	21st to end	Day	27% 6% 16% 31% 16% 4	2520
July	1st to 10th	Day	34% 7% 16% 25% 16% 3	2278
	11th to 20th	Day	24% 7% 17% 30% 18% 3	2271
	21st to end	Day	33% 7% 13% 33% 13% 1	2405
August	1st to 10th	Day	32% 7% 19% 27% 14% 1	2314
	11th to 20th	Day	31% 7% 13% 32% 15% 2	2301
	21st to end	Day	29% 6% 13% 26% 20% 6%	2412
September	1st to 10th	Day	32% 5% 13% 27% 18% 6%	2160
	11th to 20th	Day	31% 5% 13% 25% 24% 2	2013
	21st to end	Day	30% 5% 9% 30% 23% 3	1958
October	1st to 10th	Day	32% 3 12% 29% 21% 3	1800
	11th to 20th	Day	33% 4 7% 28% 24% 5%	1800
	21st to end	Day	41% 3 10% 21% 19% 5%	1980
November	1st to 10th	Day	31% 4 12% 29% 19% 5%	1858
	11th to 20th	Day	36% 3 10% 26% 22% 3	1652
	21st to end	Day	40% 3 9% 27% 20% 1	1520
December	1st to 10th	Day	39% 4 12% 31% 13% 1	1520
	11th to 20th	Day	45% 3 13% 27% 11% 2	1915
	21st to end	Day	60% 3 11% 17% 8% 1	2911
January	1st to 10th	Night	47% 3 14% 23% 12% 1	4108
	11th to 20th	Night	51% 4 11% 22% 12% 1	4120
	21st to end	Night	53% 3 11% 20% 11% 1	4532
February	1st to 10th	Night	46% 4 11% 23% 14% 3	2470
	11th to 20th	Night	41% 4 11% 23% 17% 3	2404
	21st to end	Night	40% 3 9% 24% 19% 6%	1845
March	1st to 10th	Night	37% 3 10% 25% 20% 4	2041
	11th to 20th	Night	44% 5% 9% 23% 15% 4	1980
	21st to end	Night	51% 5% 12% 20% 10% 2	2178
April	1st to 10th	Night	35% 3 11% 25% 22% 4	1872
	11th to 20th	Night	40% 3 8% 28% 17% 4	1775
	21st to end	Night	42% 4 11% 26% 16% 1	1694
May	1st to 10th	Night	43% 6% 11% 23% 16% 1	1620
	11th to 20th	Night	37% 6% 14% 27% 16% 1	1594
	21st to end	Night	36% 6% 16% 28% 11% 2	1676
June	1st to 10th	Night	22% 6% 19% 32% 17% 3	1440
	11th to 20th	Night	27% 7% 14% 31% 19% 2	1440
	21st to end	Night	19% 5% 14% 35% 22% 5%	1440
July	1st to 10th	Night	27% 6% 16% 31% 16% 4	1566
	11th to 20th	Night	20% 4 14% 34% 23% 4	1566
	21st to end	Night	27% 6% 13% 33% 18% 2	1673
August	1st to 10th	Night	24% 6% 18% 33% 16% 3	1601
	11th to 20th	Night	26% 5% 11% 34% 22% 2	1600
	21st to end	Night	23% 5% 11% 28% 26% 7%	1942
September	1st to 10th	Night	30% 4 9% 29% 20% 8%	1800
	11th to 20th	Night	28% 5% 9% 28% 25% 5%	1944
	21st to end	Night	27% 4 7% 28% 29% 5%	1984
October	1st to 10th	Night	29% 3 10% 27% 24% 6%	2160
	11th to 20th	Night	32% 3 6% 29% 22% 8%	2160
	21st to end	Night	38% 3 7% 23% 24% 4	2376
November	1st to 10th	Night	28% 3 12% 28% 24% 6%	2220
	11th to 20th	Night	33% 3 8% 26% 25% 5%	2521
	21st to end	Night	38% 3 8% 29% 19% 3	2660
December	1st to 10th	Night	38% 4 13% 27% 16% 2	2660
	11th to 20th	Night	40% 4 10% 30% 16% 2	3281
	21st to end	Night	59% 4 8% 19% 9% 2	4752

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	24% 15% 34% 21% 6%	270
	11th to 20th	Day	29% 16% 37% 18% 1	270
	21st to end	Day	17% 14% 44% 19% 5%	297
February	1st to 10th	Day	26% 15% 40% 17% 2	270
	11th to 20th	Day	19% 20% 40% 17% 4 1	270
	21st to end	Day	20% 26% 40% 11% 4	225
March	1st to 10th	Day	17% 20% 43% 17% 4	255
	11th to 20th	Day	30% 12% 33% 20% 4	240
	21st to end	Day	36% 18% 30% 13% 3	264
April	1st to 10th	Day	22% 14% 39% 18% 6% 1	348
	11th to 20th	Day	20% 17% 34% 20% 8% 1	412
	21st to end	Day	23% 14% 33% 20% 9% 1	522
May	1st to 10th	Day	20% 11% 37% 22% 9% 1	603
	11th to 20th	Day	19% 10% 29% 27% 11% 3	625
	21st to end	Day	19% 7% 26% 27% 15% 6%	679
June	1st to 10th	Day	7% 3 18% 36% 28% 8%	630
	11th to 20th	Day	8% 4 24% 40% 20% 4	630
	21st to end	Day	6% 6% 32% 34% 19% 3	630
July	1st to 10th	Day	13% 2 11% 29% 33% 12%	621
	11th to 20th	Day	4 3 18% 37% 29% 9%	618
	21st to end	Day	8% 2 15% 37% 31% 7%	684
August	1st to 10th	Day	8% 3 14% 40% 31% 5%	626
	11th to 20th	Day	8% 3 16% 33% 34% 6%	615
	21st to end	Day	9% 2 12% 31% 35% 11%	531
September	1st to 10th	Day	14% 3 13% 35% 27% 7%	450
	11th to 20th	Day	6% 3 19% 43% 23% 5%	303
	21st to end	Day	11% 6% 27% 34% 16% 6%	270
October	1st to 10th	Day	16% 7% 29% 26% 14% 7%	270
	11th to 20th	Day	13% 18% 40% 22% 6% 1	270
	21st to end	Day	26% 12% 34% 20% 7%	297
November	1st to 10th	Day	16% 11% 35% 26% 8% 3	270
	11th to 20th	Day	19% 18% 31% 19% 11% 1	270
	21st to end	Day	23% 12% 36% 22% 7%	270
December	1st to 10th	Day	13% 14% 38% 25% 5% 4	270
	11th to 20th	Day	22% 16% 34% 20% 6% 1	270
	21st to end	Day	21% 22% 37% 20% 1	297
January	1st to 10th	Night	15% 12% 40% 27% 6%	950
	11th to 20th	Night	16% 13% 40% 25% 5% 1	950
	21st to end	Night	14% 14% 39% 29% 4	1045
February	1st to 10th	Night	18% 13% 40% 25% 4	950
	11th to 20th	Night	18% 14% 37% 28% 3	929
	21st to end	Night	19% 15% 42% 19% 4	589
March	1st to 10th	Night	16% 12% 42% 25% 4	557
	11th to 20th	Night	22% 10% 35% 26% 7% 1	540
	21st to end	Night	26% 10% 37% 23% 4	594
April	1st to 10th	Night	15% 12% 37% 29% 6%	540
	11th to 20th	Night	19% 12% 33% 29% 7%	533
	21st to end	Night	21% 8% 37% 27% 7%	540
May	1st to 10th	Night	18% 7% 33% 33% 9% 1	540
	11th to 20th	Night	17% 6% 28% 35% 12% 1	531
	21st to end	Night	14% 5% 25% 35% 18% 2	584
June	1st to 10th	Night	7% 3 17% 44% 27% 3	540
	11th to 20th	Night	6% 3 21% 46% 22% 2	540
	21st to end	Night	5% 3 25% 50% 16% 1	540
July	1st to 10th	Night	9% 1 10% 42% 34% 5%	525
	11th to 20th	Night	4 2 13% 45% 33% 3	522
	21st to end	Night	8% 2 11% 41% 37% 2	591
August	1st to 10th	Night	4 2 12% 46% 35% 1	537
	11th to 20th	Night	7% 3 10% 44% 32% 4	534
	21st to end	Night	6% 2 11% 37% 40% 3	594
September	1st to 10th	Night	13% 3 16% 40% 26% 3	540
	11th to 20th	Night	11% 2 18% 37% 26% 6%	540
	21st to end	Night	8% 5% 24% 40% 21% 4	544
October	1st to 10th	Night	13% 3 26% 37% 18% 3	720
	11th to 20th	Night	16% 8% 38% 30% 8%	720
	21st to end	Night	21% 11% 33% 25% 10%	792
November	1st to 10th	Night	13% 9% 35% 31% 12% 1	740
	11th to 20th	Night	14% 11% 38% 27% 10%	921
	21st to end	Night	20% 10% 36% 29% 5%	950
December	1st to 10th	Night	17% 10% 36% 29% 6% 1	950
	11th to 20th	Night	20% 9% 36% 31% 5%	950
	21st to end	Night	20% 15% 35% 26% 4	1045

Page generated at 2024-03-03 05:28:59. Version ac07

Copyright © 2024 Attilla Danko.