Batesville
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Batesville clear sky chart from 2005-11-05 to 2017-09-14.

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 TypeMinimum conditions for hour to be usableOut of hours
Clear of CloudsTransparencySeeingSky Brightness
Planetary:50%(no limit)Average(no limit)Nighttime Hours
Deep Sky:70%Average(no limit)5.9Nighttime Hours
CCD Imaging:70%Below AveragePoor(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

PlanetaryData
Pts
Deep Sky
Max 60%
Data
Pts
Both Planetary and Deep Sky
Max 60%
Data
Pts
Either Planetary or Deep SkyData
Pts
CCD ImagingData
Pts
Night
47%
15527
23%
46896
15%
15484
56%
15484
27%
29121

By Month

MonthDays of MonthPlanetaryData
Pts
Deep Sky
Max 60%
Data
Pts
Both Planetary and Deep Sky
Max 60%
Data
Pts
Either Planetary or Deep SkyData
Pts
CCD ImagingData
Pts
January1st to 15thNight
29%
720
24%
2327
11%
716
45%
716
20%
1427
January16th to endNight
26%
768
25%
2496
10%
768
44%
768
21%
1533
February1st to 15thNight
30%
702
27%
2109
11%
699
46%
699
26%
1238
February16th to endNight
27%
631
24%
1893
10%
631
40%
631
22%
1203
March1st to 15thNight
33%
720
24%
2045
12%
720
44%
720
25%
1312
March16th to endNight
36%
768
20%
2112
11%
768
44%
768
28%
1341
April1st to 15thNight
40%
665
25%
1923
15%
665
51%
665
32%
1131
April16th to endNight
49%
540
24%
1666
16%
540
57%
540
29%
994
May1st to 15thNight
49%
540
18%
1620
10%
540
56%
540
28%
1014
May16th to endNight
61%
561
18%
1683
13%
561
64%
561
30%
1047
June1st to 15thNight
63%
540
14%
1620
12%
540
65%
540
28%
1044
June16th to endNight
74%
540
16%
1620
13%
540
76%
540
33%
975
July1st to 15thNight
69%
510
11%
1530
10%
510
70%
510
25%
1024
July16th to endNight
72%
564
15%
1595
12%
531
74%
531
29%
1038
August1st to 15thNight
65%
539
16%
1609
14%
536
66%
536
25%
1086
August16th to endNight
66%
574
19%
1882
20%
574
66%
574
24%
1236
September1st to 15thNight
60%
716
17%
1969
15%
716
61%
716
27%
1319
September16th to endNight
57%
657
22%
1815
17%
657
61%
657
28%
1181
October1st to 15thNight
51%
660
33%
1848
25%
660
59%
660
35%
1103
October16th to endNight
51%
704
34%
2112
25%
704
64%
704
37%
1167
November1st to 15thNight
52%
700
31%
2246
25%
700
62%
700
35%
1213
November16th to endNight
39%
720
27%
2340
17%
720
52%
720
25%
1392
December1st to 15thNight
37%
720
24%
2340
15%
720
48%
720
22%
1448
December16th to endNight
30%
768
22%
2496
11%
768
43%
768
18%
1655

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 ForecastData
Points
Cloud CoverDay
14%5%25%5%35%5%5%7%39%
47808
Night
14%5%2442445%7%44%
47097
TransparencyDay
41%5%11%19%17%4
47509
Night
37%5%11%20%19%5%
46900
SeeingDay
17%6%17%22%20%14%
5399
Night
17%8%19%28%21%4
15531

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
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 15thDay
19%5%245%23335%44%
1611
16th to endDay
16%5%13323445%47%
1728
February1st to 15thDay
16%6%2432445%6%44%
1747
16th to endDay
17%425%324436%44%
1580
March1st to 15thDay
18%5%23324346%43%
1914
16th to endDay
17%5%245%25%446%40%
2111
April1st to 15thDay
13%425%425%5%6%8%41%
2034
16th to endDay
14%4245%2445%5%45%
2292
May1st to 15thDay
13%6%26%435%5%5%7%40%
2331
16th to endDay
11%416%7%46%6%5%8%35%
2431
June1st to 15thDay
10%5%26%7%5%8%6%7%10%30%
2340
16th to endDay
5%325%7%47%7%8%10%36%
2340
July1st to 15thDay
10%5%37%8%5%9%7%8%9%23%
2340
16th to endDay
7%427%8%6%8%8%8%10%26%
2465
August1st to 15thDay
11%5%26%5%5%8%8%7%10%28%
2340
16th to endDay
13%6%36%7%46%7%7%8%26%
2304
September1st to 15thDay
14%5%26%6%47%7%6%7%32%
1967
16th to endDay
18%5%25%5%2336%7%38%
1815
October1st to 15thDay
15%5%12312246%54%
1780
16th to endDay
13%41331222458%
1760
November1st to 15thDay
13%313223335%57%
1610
16th to endDay
18%413323345%48%
1620
December1st to 15thDay
19%6%2441445%441%
1620
16th to endDay
26%6%13413345%39%
1728
January1st to 15thNight
19%423423345%46%
2327
16th to endNight
16%5%25%423345%45%
2496
February1st to 15thNight
14%314423445%50%
2103
16th to endNight
15%5%25%5%2445%6%43%
1893
March1st to 15thNight
16%5%14324445%45%
2045
16th to endNight
14%7%135%23446%46%
2112
April1st to 15thNight
14%313323447%50%
1923
16th to endNight
11%415%42445%6%48%
1666
May1st to 15thNight
12%4244335%6%8%43%
1619
16th to endNight
9%5%25%435%5%6%7%45%
1682
June1st to 15thNight
9%5%25%6%35%6%9%10%38%
1620
16th to endNight
5%313445%6%7%12%44%
1620
July1st to 15thNight
9%425%6%47%6%8%12%33%
1620
16th to endNight
6%4246%26%7%9%13%34%
1703
August1st to 15thNight
13%5%25%5%36%5%7%11%34%
1620
16th to endNight
12%5%26%5%35%5%8%10%34%
1882
September1st to 15thNight
12%6%25%445%6%5%8%37%
1969
16th to endNight
15%5%1442445%7%42%
1815
October1st to 15thNight
14%41341333454%
1848
16th to endNight
11%31342234458%
2112
November1st to 15thNight
13%313312235%57%
2246
16th to endNight
17%413333345%49%
2340
December1st to 15thNight
17%5%25%5%13345%45%
2340
16th to endNight
22%7%144245%5%5%36%
2496

Transparency (when cloud cover <= 30%)
Color Meanings:
Too cloudy to forecast Poor Below Average Average Above average Transparent
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 15thDay
43%37%15%23%6%
1612
16th to endDay
38%36%21%21%8%
1728
February1st to 15thDay
38%38%20%24%4
1749
16th to endDay
40%38%21%18%6%
1580
March1st to 15thDay
41%37%19%20%6%
1914
16th to endDay
43%411%20%16%3
2112
April1st to 15thDay
37%5%10%21%19%5%
2034
16th to endDay
37%49%21%20%5%
2292
May1st to 15thDay
41%412%19%18%2
2331
16th to endDay
42%7%14%19%13%2
2435
June1st to 15thDay
44%8%19%20%5%1
2340
16th to endDay
37%9%16%19%14%2
2340
July1st to 15thDay
49%9%17%16%6%1
2201
16th to endDay
43%10%18%17%7%1
2310
August1st to 15thDay
44%9%15%20%8%1
2327
16th to endDay
50%8%14%17%8%
2304
September1st to 15thDay
45%6%12%17%14%3
1967
16th to endDay
43%411%17%19%4
1815
October1st to 15thDay
31%310%18%27%8%
1780
16th to endDay
30%15%19%30%12%
1760
November1st to 15thDay
30%27%16%31%11%
1610
16th to endDay
38%25%18%27%7%
1620
December1st to 15thDay
43%37%18%18%7%
1620
16th to endDay
47%27%17%16%7%
1728
January1st to 15thNight
40%37%16%25%6%
2327
16th to endNight
41%25%18%23%7%
2496
February1st to 15thNight
35%27%21%25%7%
2112
16th to endNight
40%47%21%22%4
1893
March1st to 15thNight
38%5%8%19%19%7%
2045
16th to endNight
38%311%23%18%3
2112
April1st to 15thNight
32%310%25%22%5%
1923
16th to endNight
35%49%23%20%6%
1666
May1st to 15thNight
37%5%15%21%17%1
1620
16th to endNight
35%6%16%25%11%2
1684
June1st to 15thNight
36%9%21%22%8%1
1620
16th to endNight
29%10%20%22%14%2
1620
July1st to 15thNight
40%9%22%19%7%1
1530
16th to endNight
34%10%22%20%8%1
1595
August1st to 15thNight
40%9%17%21%10%1
1609
16th to endNight
40%8%18%20%9%1
1882
September1st to 15thNight
41%7%14%18%14%3
1969
16th to endNight
39%6%11%21%16%4
1815
October1st to 15thNight
33%310%18%26%6%
1848
16th to endNight
29%25%20%29%11%
2112
November1st to 15thNight
30%25%18%30%12%
2246
16th to endNight
37%4419%24%9%
2340
December1st to 15thNight
41%38%18%19%8%
2340
16th to endNight
47%38%16%17%5%
2496

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
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 15thDay
26%17%32%17%41
90
16th to endDay
20%33%31%12%2
96
February1st to 15thDay
18%25%43%12%
90
16th to endDay
29%16%40%11%2
81
March1st to 15thDay
23%13%27%25%8%
204
16th to endDay
20%14%25%25%12%1
288
April1st to 15thDay
17%10%23%27%17%4
270
16th to endDay
15%8%20%28%20%8%
270
May1st to 15thDay
16%9%26%17%14%15%
288
16th to endDay
17%5%16%20%22%17%
331
June1st to 15thDay
15%37%24%27%21%
315
16th to endDay
9%116%24%23%24%
315
July1st to 15thDay
10%112%20%25%29%
305
16th to endDay
6%16%17%32%34%
326
August1st to 15thDay
20%7%20%23%26%
313
16th to endDay
18%17%20%28%23%
332
September1st to 15thDay
16%411%18%30%17%
310
16th to endDay
22%19%24%29%11%
254
October1st to 15thDay
20%417%29%20%7%
255
16th to endDay
16%5%17%29%25%5%
272
November1st to 15thDay
25%12%19%22%16%4
118
16th to endDay
24%432%25%11%2
90
December1st to 15thDay
24%21%28%18%5%1
90
16th to endDay
43%9%31%13%2
96
January1st to 15thNight
24%16%24%26%7%
720
16th to endNight
21%17%28%29%3
768
February1st to 15thNight
18%16%29%31%4
704
16th to endNight
19%18%29%27%4
631
March1st to 15thNight
20%15%28%30%5%
720
16th to endNight
19%11%25%30%12%
768
April1st to 15thNight
18%12%25%27%14%1
665
16th to endNight
13%7%21%34%19%2
540
May1st to 15thNight
16%5%20%31%22%3
540
16th to endNight
13%115%27%33%8%
563
June1st to 15thNight
11%110%29%37%10%
540
16th to endNight
6%110%27%39%13%
540
July1st to 15thNight
11%17%20%47%11%
510
16th to endNight
8%16%24%41%18%
564
August1st to 15thNight
17%15%20%41%13%
539
16th to endNight
14%1425%41%12%
574
September1st to 15thNight
15%110%25%35%11%
716
16th to endNight
19%212%34%27%3
657
October1st to 15thNight
16%6%18%27%23%6%
660
16th to endNight
13%8%19%32%21%4
704
November1st to 15thNight
15%8%20%31%20%4
700
16th to endNight
20%12%22%28%14%1
720
December1st to 15thNight
20%13%22%32%10%1
720
16th to endNight
27%11%25%27%7%
768
Page generated at 2017-09-15 10:29:58. Version ac04

Copyright 2017 A. Danko


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