Kingsland
Clear Sky Chart
History

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

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	10% 6% 2 7% 5% 5% 6% 5% 7% 9% 39%	101083
	Night	10% 6% 2 6% 5% 4 5% 4 6% 8% 42%	98052
Transparency	Day	21% 49% 9% 10% 8% 3	104825
	Night	21% 49% 8% 10% 8% 4	102436
Seeing	Day	12% 7% 22% 27% 20% 13%	15449
	Night	12% 6% 20% 32% 25% 5%	25497

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	11% 8% 3 6% 3 4 4 3 5% 7% 47%	2836
	11th to 20th	Day	14% 6% 2 7% 5% 4 4 3 5% 7% 42%	2840
	21st to end	Day	13% 6% 2 6% 5% 4 4 4 6% 8% 44%	3124
February	1st to 10th	Day	15% 8% 3 6% 4 3 4 3 5% 6% 43%	1881
	11th to 20th	Day	14% 5% 2 6% 4 3 4 3 4 5% 49%	1848
	21st to end	Day	13% 7% 2 5% 4 3 3 3 5% 6% 48%	1633
March	1st to 10th	Day	15% 8% 3 7% 5% 4 4 4 6% 7% 37%	3435
	11th to 20th	Day	7% 4 2 5% 3 4 4 4 6% 8% 53%	3480
	21st to end	Day	15% 6% 2 6% 4 4 4 3 6% 7% 42%	3815
April	1st to 10th	Day	9% 4 2 5% 5% 4 3 4 7% 8% 49%	2090
	11th to 20th	Day	10% 6% 2 6% 5% 5% 5% 4 6% 6% 45%	2137
	21st to end	Day	6% 4 1 4 3 4 4 3 6% 9% 54%	2341
May	1st to 10th	Day	6% 3 2 5% 4 4 4 5% 7% 9% 51%	4082
	11th to 20th	Day	11% 6% 2 7% 5% 5% 5% 4 6% 9% 39%	4081
	21st to end	Day	6% 3 2 5% 4 5% 6% 4 7% 12% 47%	4476
June	1st to 10th	Day	11% 6% 2 7% 5% 7% 7% 5% 9% 10% 31%	2470
	11th to 20th	Day	5% 5% 2 7% 7% 6% 7% 6% 9% 11% 34%	2470
	21st to end	Day	7% 7% 3 8% 7% 8% 7% 6% 9% 10% 26%	2470
July	1st to 10th	Day	7% 6% 3 9% 8% 8% 9% 7% 9% 11% 22%	4120
	11th to 20th	Day	4 5% 2 8% 7% 8% 9% 7% 11% 14% 26%	4120
	21st to end	Day	5% 5% 2 8% 7% 8% 8% 8% 11% 13% 24%	4466
August	1st to 10th	Day	12% 7% 3 9% 6% 7% 8% 6% 8% 10% 23%	4104
	11th to 20th	Day	6% 4 2 7% 5% 7% 7% 5% 9% 12% 36%	4044
	21st to end	Day	10% 6% 3 8% 7% 7% 7% 6% 8% 10% 28%	3869
September	1st to 10th	Day	13% 9% 3 8% 7% 7% 7% 5% 7% 8% 25%	2090
	11th to 20th	Day	16% 7% 3 8% 7% 7% 7% 6% 7% 9% 24%	2090
	21st to end	Day	14% 7% 3 8% 5% 5% 5% 5% 7% 8% 34%	2090
October	1st to 10th	Day	13% 6% 3 7% 6% 5% 5% 4 6% 8% 36%	2050
	11th to 20th	Day	7% 5% 2 6% 5% 3 4 4 6% 6% 53%	1900
	21st to end	Day	10% 5% 2 5% 3 5% 4 4 5% 7% 50%	2090
November	1st to 10th	Day	12% 5% 2 6% 4 4 4 4 5% 7% 47%	1957
	11th to 20th	Day	12% 5% 3 6% 5% 4 3 3 4 6% 49%	1887
	21st to end	Day	14% 7% 2 6% 4 3 5% 3 5% 7% 44%	1710
December	1st to 10th	Day	11% 6% 2 7% 6% 4 4 4 5% 7% 45%	1710
	11th to 20th	Day	16% 7% 2 4 5% 4 3 3 4 6% 45%	2153
	21st to end	Day	16% 7% 2 7% 5% 4 5% 3 4 5% 42%	3124
January	1st to 10th	Night	14% 8% 3 6% 4 3 3 3 5% 7% 44%	4109
	11th to 20th	Night	10% 8% 3 7% 4 4 5% 5% 6% 8% 40%	4120
	21st to end	Night	12% 7% 3 7% 5% 4 4 3 5% 7% 42%	4532
February	1st to 10th	Night	15% 8% 2 6% 5% 4 4 3 4 6% 43%	2295
	11th to 20th	Night	14% 8% 2 6% 4 4 4 3 4 6% 46%	2218
	21st to end	Night	12% 7% 2 5% 4 4 4 3 5% 6% 47%	1819
March	1st to 10th	Night	20% 11% 3 6% 4 3 3 3 4 6% 35%	3418
	11th to 20th	Night	7% 5% 2 5% 3 3 4 3 6% 10% 52%	3480
	21st to end	Night	13% 6% 2 6% 4 4 4 3 5% 6% 48%	3817
April	1st to 10th	Night	9% 5% 2 4 3 4 4 4 6% 8% 50%	2090
	11th to 20th	Night	9% 6% 2 5% 3 3 3 3 5% 7% 53%	1989
	21st to end	Night	6% 4 1 3 3 4 4 5% 7% 8% 55%	1854
May	1st to 10th	Night	5% 3 2 4 3 4 5% 4 7% 9% 54%	2813
	11th to 20th	Night	11% 5% 2 6% 4 5% 5% 4 6% 9% 42%	2812
	21st to end	Night	5% 3 2 5% 3 4 4 4 6% 9% 55%	3079
June	1st to 10th	Night	8% 5% 2 6% 5% 6% 6% 7% 8% 12% 36%	1710
	11th to 20th	Night	6% 4 2 6% 5% 6% 6% 5% 8% 13% 38%	1710
	21st to end	Night	7% 5% 2 5% 6% 6% 6% 5% 9% 14% 34%	1710
July	1st to 10th	Night	7% 6% 4 9% 7% 7% 6% 6% 9% 11% 28%	2840
	11th to 20th	Night	3 5% 3 8% 6% 6% 8% 6% 11% 15% 29%	2840
	21st to end	Night	5% 6% 3 8% 6% 7% 8% 8% 11% 12% 26%	3087
August	1st to 10th	Night	12% 6% 2 7% 6% 6% 8% 6% 8% 12% 27%	2825
	11th to 20th	Night	4 4 2 6% 5% 5% 6% 5% 8% 12% 41%	2785
	21st to end	Night	9% 6% 3 7% 5% 5% 5% 5% 8% 10% 37%	3747
September	1st to 10th	Night	11% 8% 3 9% 6% 6% 7% 5% 7% 9% 29%	2090
	11th to 20th	Night	13% 7% 3 8% 7% 6% 7% 6% 8% 9% 27%	2090
	21st to end	Night	10% 7% 3 8% 4 5% 5% 3 7% 9% 40%	2090
October	1st to 10th	Night	12% 7% 3 7% 4 4 4 4 6% 8% 41%	2128
	11th to 20th	Night	7% 5% 1 5% 3 3 4 3 5% 7% 56%	2280
	21st to end	Night	8% 5% 2 6% 4 4 5% 3 5% 6% 53%	2508
November	1st to 10th	Night	10% 5% 2 6% 5% 4 4 4 5% 7% 48%	2341
	11th to 20th	Night	13% 7% 1 5% 4 4 5% 3 4 7% 47%	2312
	21st to end	Night	13% 6% 2 7% 4 4 5% 4 6% 7% 43%	2470
December	1st to 10th	Night	11% 7% 2 6% 5% 4 4 4 5% 8% 43%	2470
	11th to 20th	Night	15% 7% 3 7% 4 3 3 3 4 6% 47%	3042
	21st to end	Night	15% 8% 3 8% 4 5% 5% 3 5% 6% 38%	4532

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	26% 37% 4 9% 16% 7%	2837
	11th to 20th	Day	31% 37% 5% 6% 10% 11%	2840
	21st to end	Day	21% 42% 7% 11% 10% 8%	3124
February	1st to 10th	Day	14% 66% 5% 5% 7% 3	1881
	11th to 20th	Day	13% 64% 4 7% 9% 3	1858
	21st to end	Day	14% 65% 4 5% 7% 5%	1633
March	1st to 10th	Day	33% 44% 7% 11% 4 2	3435
	11th to 20th	Day	16% 42% 10% 10% 10% 12%	3480
	21st to end	Day	26% 43% 4 12% 9% 6%	3815
April	1st to 10th	Day	11% 66% 5% 8% 5% 5%	2090
	11th to 20th	Day	14% 65% 3 8% 5% 4	2137
	21st to end	Day	9% 65% 5% 11% 8% 2	2341
May	1st to 10th	Day	15% 45% 9% 19% 9% 2	4120
	11th to 20th	Day	26% 43% 7% 15% 8% 1	4085
	21st to end	Day	11% 43% 11% 23% 11% 1	4489
June	1st to 10th	Day	15% 68% 8% 6% 3	2470
	11th to 20th	Day	14% 67% 7% 8% 4	2470
	21st to end	Day	15% 67% 10% 5% 2	2470
July	1st to 10th	Day	29% 44% 19% 8%	4055
	11th to 20th	Day	22% 43% 30% 5% 1	4051
	21st to end	Day	27% 46% 21% 5% 1	4324
August	1st to 10th	Day	34% 41% 19% 5%	4091
	11th to 20th	Day	16% 42% 15% 18% 9%	4083
	21st to end	Day	23% 42% 13% 21% 1	3869
September	1st to 10th	Day	23% 63% 5% 3 4 1	2090
	11th to 20th	Day	18% 62% 8% 7% 4	2090
	21st to end	Day	17% 61% 8% 8% 5% 1	2090
October	1st to 10th	Day	35% 38% 6% 5% 9% 7%	3401
	11th to 20th	Day	10% 38% 3 12% 25% 12%	3140
	21st to end	Day	10% 37% 4 16% 26% 6%	3428
November	1st to 10th	Day	18% 57% 7% 9% 6% 4	1957
	11th to 20th	Day	18% 60% 3 7% 8% 4	1887
	21st to end	Day	15% 61% 4 10% 8% 2	1710
December	1st to 10th	Day	17% 60% 6% 8% 6% 2	1710
	11th to 20th	Day	18% 48% 5% 8% 15% 5%	2150
	21st to end	Day	32% 38% 4 12% 9% 5%	3124
January	1st to 10th	Night	28% 38% 4 7% 13% 11%	4109
	11th to 20th	Night	30% 38% 4 8% 12% 8%	4120
	21st to end	Night	25% 42% 5% 10% 11% 7%	4532
February	1st to 10th	Night	14% 66% 4 6% 8% 3	2295
	11th to 20th	Night	14% 63% 4 9% 7% 4	2219
	21st to end	Night	14% 65% 5% 5% 6% 5%	1819
March	1st to 10th	Night	37% 43% 7% 7% 4 2	3418
	11th to 20th	Night	16% 42% 9% 13% 11% 8%	3480
	21st to end	Night	26% 42% 4 8% 12% 8%	3817
April	1st to 10th	Night	12% 65% 6% 7% 5% 5%	2090
	11th to 20th	Night	12% 66% 3 9% 5% 4	1989
	21st to end	Night	9% 65% 5% 11% 7% 2	1854
May	1st to 10th	Night	15% 46% 13% 17% 7% 2	2840
	11th to 20th	Night	24% 43% 9% 16% 7% 1	2813
	21st to end	Night	9% 44% 11% 23% 12% 1	3087
June	1st to 10th	Night	12% 68% 10% 7% 3	1710
	11th to 20th	Night	12% 68% 8% 9% 3	1710
	21st to end	Night	13% 67% 10% 7% 2	1710
July	1st to 10th	Night	28% 41% 22% 9%	2795
	11th to 20th	Night	24% 48% 23% 4 1	2786
	21st to end	Night	32% 45% 17% 5% 1	2988
August	1st to 10th	Night	34% 43% 19% 4	2814
	11th to 20th	Night	18% 41% 16% 17% 7%	2812
	21st to end	Night	20% 42% 17% 20% 1	3747
September	1st to 10th	Night	21% 63% 8% 4 3 1	2090
	11th to 20th	Night	19% 63% 8% 7% 4	2090
	21st to end	Night	14% 61% 8% 10% 6%	2090
October	1st to 10th	Night	35% 38% 5% 7% 9% 6%	3544
	11th to 20th	Night	12% 37% 4 12% 23% 14%	3779
	21st to end	Night	10% 39% 5% 13% 26% 8%	4120
November	1st to 10th	Night	19% 57% 6% 8% 6% 4	2341
	11th to 20th	Night	18% 60% 4 6% 8% 4	2312
	21st to end	Night	16% 60% 4 9% 9% 3	2470
December	1st to 10th	Night	16% 60% 8% 9% 5% 1	2470
	11th to 20th	Night	20% 49% 3 9% 14% 6%	3044
	21st to end	Night	33% 40% 8% 8% 10% 1	4532

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	14% 12% 49% 21% 4	270
	11th to 20th	Day	7% 11% 43% 27% 9% 2	270
	21st to end	Day	18% 20% 42% 16% 4	297
February	1st to 10th	Day	16% 14% 38% 25% 6% 1	270
	11th to 20th	Day	18% 14% 40% 21% 6%	270
	21st to end	Day	12% 16% 36% 28% 6%	288
March	1st to 10th	Day	12% 14% 33% 29% 11% 1	460
	11th to 20th	Day	13% 9% 39% 26% 10% 3	460
	21st to end	Day	14% 12% 37% 24% 12% 2	506
April	1st to 10th	Day	13% 14% 34% 23% 14% 2	460
	11th to 20th	Day	11% 11% 31% 26% 15% 5%	452
	21st to end	Day	5% 8% 30% 30% 18% 8%	460
May	1st to 10th	Day	6% 8% 25% 34% 19% 8%	463
	11th to 20th	Day	8% 2 26% 30% 23% 11%	487
	21st to end	Day	9% 3 14% 28% 28% 18%	529
June	1st to 10th	Day	13% 3 12% 32% 22% 18%	490
	11th to 20th	Day	6% 3 15% 26% 27% 24%	490
	21st to end	Day	7% 3 7% 27% 29% 26%	490
July	1st to 10th	Day	7% 2 4 19% 32% 36%	485
	11th to 20th	Day	5% 2 2 20% 36% 36%	484
	21st to end	Day	8% 2 5% 23% 36% 27%	532
August	1st to 10th	Day	10% 2 8% 22% 30% 27%	486
	11th to 20th	Day	7% 1 4 19% 34% 34%	479
	21st to end	Day	13% 3 6% 26% 30% 23%	539
September	1st to 10th	Day	16% 5% 6% 22% 27% 24%	490
	11th to 20th	Day	18% 3 11% 31% 25% 13%	490
	21st to end	Day	13% 2 11% 28% 30% 15%	490
October	1st to 10th	Day	16% 5% 26% 27% 19% 6%	490
	11th to 20th	Day	8% 8% 25% 34% 19% 6%	490
	21st to end	Day	12% 5% 22% 37% 20% 4	539
November	1st to 10th	Day	15% 8% 27% 30% 15% 5%	495
	11th to 20th	Day	20% 10% 26% 31% 12% 2	441
	21st to end	Day	14% 11% 36% 31% 7% 1	270
December	1st to 10th	Day	10% 13% 37% 26% 12% 2	270
	11th to 20th	Day	20% 12% 34% 25% 7% 2	270
	21st to end	Day	16% 9% 33% 32% 10%	297
January	1st to 10th	Night	14% 11% 35% 29% 9% 1	760
	11th to 20th	Night	11% 11% 27% 37% 12% 1	760
	21st to end	Night	16% 11% 36% 31% 6%	836
February	1st to 10th	Night	16% 10% 31% 34% 8% 1	760
	11th to 20th	Night	18% 9% 32% 33% 7%	743
	21st to end	Night	15% 10% 32% 37% 6%	628
March	1st to 10th	Night	11% 9% 31% 38% 11%	760
	11th to 20th	Night	10% 10% 32% 36% 11% 1	760
	21st to end	Night	12% 8% 32% 36% 11% 1	836
April	1st to 10th	Night	11% 8% 32% 37% 12% 1	760
	11th to 20th	Night	12% 7% 30% 33% 17% 1	751
	21st to end	Night	7% 4 25% 44% 19% 1	714
May	1st to 10th	Night	6% 3 19% 45% 25% 2	570
	11th to 20th	Night	8% 2 18% 37% 29% 6%	561
	21st to end	Night	8% 2 9% 34% 39% 8%	617
June	1st to 10th	Night	9% 2 8% 38% 35% 8%	570
	11th to 20th	Night	6% 2 9% 28% 39% 15%	570
	21st to end	Night	8% 2 7% 29% 42% 12%	570
July	1st to 10th	Night	6% 2 4 25% 47% 16%	555
	11th to 20th	Night	6% 2 2 17% 53% 21%	552
	21st to end	Night	4 1 4 26% 54% 11%	624
August	1st to 10th	Night	8% 1 2 25% 50% 13%	567
	11th to 20th	Night	6% 1 1 19% 54% 19%	564
	21st to end	Night	14% 3 6% 23% 39% 16%	812
September	1st to 10th	Night	13% 4 5% 25% 41% 12%	760
	11th to 20th	Night	14% 4 8% 27% 39% 8%	760
	21st to end	Night	15% 4 8% 29% 37% 8%	760
October	1st to 10th	Night	17% 3 19% 28% 29% 5%	760
	11th to 20th	Night	8% 5% 18% 37% 28% 5%	760
	21st to end	Night	10% 5% 19% 37% 26% 3	836
November	1st to 10th	Night	12% 7% 23% 35% 22% 2	780
	11th to 20th	Night	15% 8% 23% 34% 20% 1	765
	21st to end	Night	14% 6% 28% 35% 16% 1	760
December	1st to 10th	Night	14% 8% 26% 33% 18% 1	760
	11th to 20th	Night	16% 6% 28% 31% 18% 1	760
	21st to end	Night	18% 6% 25% 37% 13% 1	836

Page generated at 2024-11-08 22:45:35. Version ac07

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