Batesville
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Batesville clear sky chart from 2005-11-06 to 2024-01-31.

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% 6% 2 5% 5% 3 5% 5% 5% 7% 45%	74816
	Night	12% 5% 2 5% 4 3 4 4 5% 7% 50%	75330
Transparency	Day	38% 4 11% 25% 18% 4	74539
	Night	36% 3 10% 25% 22% 5%	75128
Seeing	Day	15% 10% 24% 26% 19% 7%	14318
	Night	16% 10% 26% 30% 17% 2	24276

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	17% 7% 2 4 5% 2 3 3 4 5% 48%	1707
	11th to 20th	Day	17% 7% 4 5% 5% 2 4 4 3 5% 45%	1710
	21st to end	Day	15% 8% 2 4 4 2 3 3 4 5% 51%	1872
February	1st to 10th	Day	18% 6% 3 6% 5% 2 4 3 3 5% 44%	1620
	11th to 20th	Day	15% 8% 3 6% 6% 3 4 4 5% 6% 41%	1726
	21st to end	Day	18% 9% 4 6% 6% 3 3 3 5% 6% 37%	1480
March	1st to 10th	Day	16% 7% 2 4 4 2 4 5% 5% 6% 44%	1947
	11th to 20th	Day	21% 7% 3 6% 5% 2 4 4 4 5% 40%	1980
	21st to end	Day	18% 7% 3 7% 5% 2 5% 5% 5% 6% 38%	2222
April	1st to 10th	Day	12% 6% 3 6% 5% 3 3 4 6% 7% 46%	2160
	11th to 20th	Day	15% 6% 2 6% 5% 3 4 4 6% 7% 43%	2134
	21st to end	Day	17% 7% 3 6% 6% 3 5% 4 6% 5% 41%	2160
May	1st to 10th	Day	14% 7% 4 6% 7% 4 5% 4 5% 7% 38%	2160
	11th to 20th	Day	12% 6% 3 5% 5% 4 6% 5% 6% 8% 40%	2242
	21st to end	Day	9% 5% 2 6% 8% 4 7% 6% 7% 9% 37%	2712
June	1st to 10th	Day	7% 5% 2 5% 5% 3 6% 6% 8% 9% 43%	2520
	11th to 20th	Day	5% 2 2 4 4 4 6% 7% 7% 11% 49%	2520
	21st to end	Day	4 3 2 4 5% 3 5% 5% 6% 11% 51%	2520
July	1st to 10th	Day	7% 5% 2 6% 6% 4 8% 5% 7% 10% 39%	2442
	11th to 20th	Day	5% 3 2 5% 6% 3 6% 7% 8% 10% 44%	2340
	21st to end	Day	7% 4 2 5% 6% 4 5% 5% 7% 10% 45%	2546
August	1st to 10th	Day	7% 4 2 5% 6% 4 6% 5% 8% 11% 43%	2314
	11th to 20th	Day	10% 5% 2 4 6% 3 5% 5% 6% 9% 44%	2125
	21st to end	Day	8% 5% 2 4 5% 3 5% 5% 6% 10% 47%	2376
September	1st to 10th	Day	10% 5% 2 4 4 3 4 6% 6% 7% 48%	2160
	11th to 20th	Day	13% 4 2 5% 4 3 4 4 5% 8% 47%	2160
	21st to end	Day	10% 3 2 4 4 2 4 4 4 6% 57%	1918
October	1st to 10th	Day	8% 5% 2 4 4 3 4 4 5% 7% 56%	1800
	11th to 20th	Day	14% 5% 2 3 4 2 3 3 4 5% 56%	1800
	21st to end	Day	19% 5% 2 3 4 3 3 4 5% 5% 49%	1980
November	1st to 10th	Day	12% 5% 3 4 3 2 3 2 4 6% 57%	1841
	11th to 20th	Day	10% 5% 2 5% 4 2 3 4 5% 7% 53%	1710
	21st to end	Day	20% 7% 2 5% 4 2 3 3 4 5% 46%	1691
December	1st to 10th	Day	17% 6% 2 5% 5% 3 3 4 4 5% 46%	1520
	11th to 20th	Day	15% 7% 2 7% 4 4 4 3 3 5% 45%	1918
	21st to end	Day	13% 9% 4 7% 5% 3 4 5% 6% 6% 38%	2783
January	1st to 10th	Night	16% 7% 3 4 4 2 4 3 4 5% 49%	2458
	11th to 20th	Night	17% 7% 3 5% 4 2 4 3 4 5% 48%	2470
	21st to end	Night	17% 6% 2 4 4 2 3 3 4 5% 51%	2711
February	1st to 10th	Night	18% 7% 4 6% 5% 3 3 3 3 5% 43%	2340
	11th to 20th	Night	16% 7% 2 6% 4 3 4 3 4 5% 47%	2120
	21st to end	Night	18% 6% 3 5% 5% 3 3 3 4 5% 45%	1776
March	1st to 10th	Night	16% 7% 2 6% 4 2 4 3 4 5% 47%	2029
	11th to 20th	Night	19% 6% 2 6% 4 2 4 3 4 6% 42%	1980
	21st to end	Night	16% 6% 3 5% 5% 3 5% 4 5% 6% 41%	2134
April	1st to 10th	Night	9% 6% 3 5% 5% 3 4 5% 4 7% 51%	1800
	11th to 20th	Night	13% 4 2 3 5% 2 4 4 5% 7% 51%	1775
	21st to end	Night	15% 6% 2 5% 4 3 4 4 5% 9% 44%	1800
May	1st to 10th	Night	14% 5% 2 4 4 2 4 3 5% 9% 48%	1800
	11th to 20th	Night	14% 5% 2 5% 4 2 4 4 5% 7% 47%	1649
	21st to end	Night	8% 4 3 5% 7% 4 4 4 7% 10% 43%	1561
June	1st to 10th	Night	5% 4 2 4 4 2 5% 5% 6% 10% 52%	1440
	11th to 20th	Night	2 2 2 3 5% 2 4 3 5% 10% 62%	1440
	21st to end	Night	3 2 2 3 4 3 4 5% 5% 11% 58%	1440
July	1st to 10th	Night	4 3 1 4 4 3 6% 6% 8% 10% 51%	1512
	11th to 20th	Night	4 2 2 3 4 4 5% 4 6% 12% 53%	1620
	21st to end	Night	4 5% 1 4 5% 3 6% 5% 7% 10% 51%	1772
August	1st to 10th	Night	4 3 2 4 4 3 5% 5% 8% 11% 52%	1623
	11th to 20th	Night	5% 4 2 5% 5% 3 5% 4 7% 9% 50%	1776
	21st to end	Night	5% 3 2 5% 4 3 5% 5% 7% 10% 50%	1980
September	1st to 10th	Night	8% 5% 1 3 4 3 4 5% 4 7% 55%	1800
	11th to 20th	Night	10% 5% 2 4 4 3 4 4 4 7% 53%	1800
	21st to end	Night	7% 4 2 4 4 2 3 4 3 6% 61%	2020
October	1st to 10th	Night	8% 3 1 3 3 2 3 3 5% 8% 60%	2160
	11th to 20th	Night	13% 4 1 3 4 2 3 3 3 4 60%	2160
	21st to end	Night	17% 4 2 5% 3 2 3 3 3 4 53%	2376
November	1st to 10th	Night	12% 5% 2 3 3 2 3 3 3 5% 59%	2234
	11th to 20th	Night	11% 4 2 4 3 3 3 4 4 6% 57%	2470
	21st to end	Night	14% 5% 2 4 4 2 5% 4 5% 7% 48%	2485
December	1st to 10th	Night	17% 7% 2 5% 4 2 4 3 4 5% 47%	2660
	11th to 20th	Night	15% 6% 2 5% 5% 2 4 3 4 5% 48%	3279
	21st to end	Night	16% 8% 3 6% 6% 3 4 4 5% 6% 39%	4880

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	42% 1 8% 26% 18% 6%	1708
	11th to 20th	Day	44% 3 9% 25% 19% 2	1710
	21st to end	Day	38% 2 8% 28% 18% 5%	1872
February	1st to 10th	Day	45% 3 9% 24% 16% 3	1620
	11th to 20th	Day	45% 4 10% 20% 18% 4	1736
	21st to end	Day	49% 2 8% 19% 14% 8%	1480
March	1st to 10th	Day	42% 3 8% 20% 18% 8%	1947
	11th to 20th	Day	49% 3 8% 21% 16% 4	1980
	21st to end	Day	47% 4 12% 23% 13% 2	2222
April	1st to 10th	Day	37% 4 8% 28% 20% 3	2160
	11th to 20th	Day	41% 3 10% 24% 16% 7%	2134
	21st to end	Day	44% 3 10% 23% 18% 2	2160
May	1st to 10th	Day	46% 4 11% 20% 17% 2	2160
	11th to 20th	Day	40% 5% 14% 24% 15% 2	2246
	21st to end	Day	41% 6% 15% 23% 12% 2	2712
June	1st to 10th	Day	36% 6% 13% 27% 18% 1	2520
	11th to 20th	Day	26% 6% 15% 32% 17% 4	2520
	21st to end	Day	27% 5% 15% 29% 20% 4	2520
July	1st to 10th	Day	37% 6% 16% 23% 16% 2	2377
	11th to 20th	Day	31% 6% 13% 29% 16% 5%	2271
	21st to end	Day	33% 5% 14% 34% 12% 1	2405
August	1st to 10th	Day	33% 5% 16% 32% 13% 1	2300
	11th to 20th	Day	35% 5% 14% 28% 16% 2	2125
	21st to end	Day	32% 4 15% 27% 18% 4	2376
September	1st to 10th	Day	36% 3 11% 25% 18% 6%	2160
	11th to 20th	Day	35% 4 10% 20% 27% 4	2160
	21st to end	Day	30% 3 7% 25% 30% 6%	1918
October	1st to 10th	Day	29% 3 9% 26% 25% 8%	1800
	11th to 20th	Day	33% 2 5% 26% 27% 8%	1800
	21st to end	Day	38% 2 7% 25% 21% 7%	1980
November	1st to 10th	Day	32% 2 8% 26% 25% 8%	1841
	11th to 20th	Day	33% 2 7% 25% 25% 8%	1710
	21st to end	Day	43% 1 7% 21% 23% 5%	1691
December	1st to 10th	Day	41% 3 9% 26% 18% 4	1520
	11th to 20th	Day	43% 2 5% 24% 22% 2	1915
	21st to end	Day	48% 1 9% 21% 16% 5%	2783
January	1st to 10th	Night	41% 2 6% 24% 23% 4	2458
	11th to 20th	Night	42% 2 8% 25% 20% 3	2470
	21st to end	Night	38% 2 8% 28% 21% 4	2711
February	1st to 10th	Night	47% 2 8% 23% 18% 3	2340
	11th to 20th	Night	43% 2 9% 24% 18% 5%	2121
	21st to end	Night	43% 2 7% 21% 19% 8%	1776
March	1st to 10th	Night	42% 2 8% 16% 22% 10%	2029
	11th to 20th	Night	45% 3 9% 21% 18% 4	1980
	21st to end	Night	44% 3 9% 24% 18% 3	2134
April	1st to 10th	Night	35% 4 11% 25% 20% 5%	1800
	11th to 20th	Night	34% 3 8% 24% 22% 8%	1775
	21st to end	Night	38% 4 10% 24% 21% 3	1800
May	1st to 10th	Night	35% 5% 14% 25% 18% 4	1800
	11th to 20th	Night	37% 4 14% 24% 18% 4	1650
	21st to end	Night	35% 5% 17% 25% 15% 3	1562
June	1st to 10th	Night	28% 4 12% 30% 23% 2	1440
	11th to 20th	Night	21% 4 13% 34% 24% 4	1440
	21st to end	Night	21% 4 14% 32% 20% 9%	1440
July	1st to 10th	Night	26% 6% 19% 27% 20% 3	1468
	11th to 20th	Night	24% 5% 17% 30% 17% 6%	1566
	21st to end	Night	29% 4 13% 34% 19%	1673
August	1st to 10th	Night	25% 5% 18% 34% 16% 1	1613
	11th to 20th	Night	30% 4 14% 29% 20% 2	1776
	21st to end	Night	29% 5% 14% 29% 18% 5%	1980
September	1st to 10th	Night	30% 4 11% 27% 21% 8%	1800
	11th to 20th	Night	33% 3 10% 22% 26% 6%	1800
	21st to end	Night	26% 3 7% 24% 31% 9%	2020
October	1st to 10th	Night	24% 3 10% 28% 26% 9%	2160
	11th to 20th	Night	30% 2 5% 20% 33% 9%	2160
	21st to end	Night	37% 2 6% 20% 26% 8%	2376
November	1st to 10th	Night	30% 3 7% 27% 25% 8%	2234
	11th to 20th	Night	30% 2 6% 27% 26% 9%	2470
	21st to end	Night	37% 3 8% 23% 25% 5%	2485
December	1st to 10th	Night	41% 2 9% 23% 20% 5%	2660
	11th to 20th	Night	40% 2 7% 23% 24% 4	3281
	21st to end	Night	49% 1 9% 21% 18% 3	4880

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	26% 19% 34% 17% 5%	270
	11th to 20th	Day	28% 23% 33% 13% 1	270
	21st to end	Day	22% 21% 38% 14% 4	294
February	1st to 10th	Day	27% 21% 35% 12% 5% 1	240
	11th to 20th	Day	29% 27% 32% 10% 3	240
	21st to end	Day	34% 22% 31% 10% 2 1	198
March	1st to 10th	Day	25% 19% 34% 18% 4	240
	11th to 20th	Day	33% 19% 30% 18% 1	240
	21st to end	Day	26% 22% 34% 13% 6%	308
April	1st to 10th	Day	19% 15% 35% 20% 10% 1	420
	11th to 20th	Day	20% 17% 33% 20% 9% 1	412
	21st to end	Day	20% 14% 36% 20% 8% 1	420
May	1st to 10th	Day	16% 17% 34% 24% 9% 1	423
	11th to 20th	Day	14% 10% 31% 24% 16% 5%	565
	21st to end	Day	9% 7% 28% 31% 18% 6%	679
June	1st to 10th	Day	8% 5% 20% 30% 26% 10%	630
	11th to 20th	Day	5% 2 20% 38% 27% 8%	630
	21st to end	Day	5% 3 23% 35% 26% 9%	630
July	1st to 10th	Day	6% 2 17% 28% 34% 13%	621
	11th to 20th	Day	6% 2 14% 34% 30% 14%	618
	21st to end	Day	7% 1 11% 31% 35% 15%	684
August	1st to 10th	Day	7% 2 11% 36% 37% 7%	612
	11th to 20th	Day	14% 2 11% 30% 31% 12%	439
	21st to end	Day	9% 2 9% 29% 33% 18%	495
September	1st to 10th	Day	9% 4 10% 27% 39% 12%	450
	11th to 20th	Day	10% 3 13% 27% 29% 18%	450
	21st to end	Day	13% 5% 18% 29% 23% 11%	356
October	1st to 10th	Day	8% 6% 22% 39% 20% 4	270
	11th to 20th	Day	16% 15% 33% 23% 12% 1	270
	21st to end	Day	28% 11% 31% 23% 6% 1	297
November	1st to 10th	Day	13% 13% 35% 24% 13% 2	270
	11th to 20th	Day	14% 16% 37% 22% 9% 1	270
	21st to end	Day	30% 12% 28% 19% 9% 1	270
December	1st to 10th	Day	21% 21% 30% 18% 8% 1	270
	11th to 20th	Day	27% 14% 31% 22% 5% 1	270
	21st to end	Day	20% 26% 37% 14% 2	297
January	1st to 10th	Night	22% 17% 32% 23% 5%	950
	11th to 20th	Night	22% 19% 34% 21% 3	950
	21st to end	Night	21% 14% 37% 25% 2	1043
February	1st to 10th	Night	25% 16% 32% 24% 4	900
	11th to 20th	Night	22% 18% 37% 21% 2	725
	21st to end	Night	25% 18% 34% 21% 2	592
March	1st to 10th	Night	23% 13% 30% 30% 4	589
	11th to 20th	Night	24% 13% 33% 26% 3	540
	21st to end	Night	20% 13% 32% 28% 7%	594
April	1st to 10th	Night	13% 17% 37% 26% 7%	540
	11th to 20th	Night	16% 16% 28% 29% 10% 1	533
	21st to end	Night	17% 9% 37% 26% 10%	540
May	1st to 10th	Night	16% 9% 29% 37% 9% 1	540
	11th to 20th	Night	16% 6% 30% 28% 17% 4	531
	21st to end	Night	11% 4 22% 36% 23% 4	584
June	1st to 10th	Night	8% 3 17% 33% 34% 5%	540
	11th to 20th	Night	3 1 13% 45% 35% 3	540
	21st to end	Night	4 2 16% 40% 35% 4	540
July	1st to 10th	Night	6% 1 8% 38% 36% 11%	525
	11th to 20th	Night	6% 1 8% 36% 41% 8%	522
	21st to end	Night	5% 1 9% 40% 36% 9%	591
August	1st to 10th	Night	5% 1 9% 38% 42% 6%	537
	11th to 20th	Night	6% 1 10% 40% 36% 6%	534
	21st to end	Night	7% 1 9% 31% 43% 8%	594
September	1st to 10th	Night	10% 2 9% 32% 44% 4	540
	11th to 20th	Night	11% 2 10% 31% 39% 6%	540
	21st to end	Night	8% 4 19% 31% 34% 3	670
October	1st to 10th	Night	9% 5% 17% 34% 33% 3	720
	11th to 20th	Night	14% 8% 28% 32% 16% 1	720
	21st to end	Night	21% 8% 27% 30% 14% 1	792
November	1st to 10th	Night	14% 9% 27% 34% 14% 1	740
	11th to 20th	Night	14% 10% 31% 33% 12%	760
	21st to end	Night	18% 12% 32% 27% 10%	775
December	1st to 10th	Night	22% 11% 32% 29% 6%	950
	11th to 20th	Night	22% 11% 31% 32% 4	950
	21st to end	Night	23% 17% 31% 24% 4	1045

Page generated at 2024-01-28 04:26:35. Version ac07

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