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 2017-03-14.

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
44%
15142
26%
45196
16%
15095
54%
15095
32%
26593

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
24%
900
28%
2327
9%
895
38%
895
27%
1487
January16th to endNight
24%
960
27%
2496
8%
960
37%
960
30%
1569
February1st to 15thNight
25%
839
21%
2242
7%
835
34%
835
27%
1439
February16th to endNight
23%
631
27%
1893
9%
631
37%
631
27%
1100
March1st to 15thNight
28%
570
21%
2002
12%
570
37%
570
22%
1247
March16th to endNight
35%
528
18%
1909
15%
528
42%
528
22%
1169
April1st to 15thNight
30%
494
26%
1647
12%
494
49%
494
30%
913
April16th to endNight
38%
495
24%
1650
17%
495
54%
495
30%
960
May1st to 15thNight
42%
494
19%
1628
13%
494
52%
494
26%
1000
May16th to endNight
53%
515
21%
1426
15%
513
58%
513
34%
891
June1st to 15thNight
70%
495
28%
1320
21%
495
75%
495
50%
719
June16th to endNight
73%
495
27%
1320
21%
495
76%
495
48%
731
July1st to 15thNight
73%
465
21%
1330
20%
465
76%
465
37%
787
July16th to endNight
81%
522
22%
1468
23%
489
82%
489
45%
776
August1st to 15thNight
78%
494
26%
1538
30%
491
80%
491
45%
800
August16th to endNight
76%
525
24%
1750
29%
525
77%
525
36%
952
September1st to 15thNight
65%
495
29%
1650
30%
495
69%
495
32%
953
September16th to endNight
62%
572
31%
1785
25%
572
67%
572
36%
988
October1st to 15thNight
55%
660
32%
1980
25%
660
61%
660
39%
1087
October16th to endNight
50%
704
34%
2112
22%
704
61%
704
40%
1141
November1st to 15thNight
45%
700
32%
2169
21%
700
57%
700
37%
1167
November16th to endNight
35%
729
27%
2349
16%
729
48%
729
28%
1370
December1st to 15thNight
34%
900
21%
2520
11%
900
43%
900
28%
1600
December16th to endNight
27%
960
23%
2685
8%
960
39%
960
25%
1747

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
12%5%245%2445%7%44%
45496
Night
11%424424347%50%
45397
TransparencyDay
37%411%24%17%3
45196
Night
34%310%25%20%5%
45202
SeeingDay
12%6%21%26%22%10%
4931
Night
14%9%25%29%17%2
15143

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
17%5%1341333450%
1611
16th to endDay
12%7%34413235%49%
1728
February1st to 15thDay
14%5%25%5%2433447%
1615
16th to endDay
13%7%36%6%2435%6%40%
1580
March1st to 15thDay
18%6%24424445%42%
1940
16th to endDay
18%6%35%424446%39%
1961
April1st to 15thDay
13%5%26%42345%6%45%
1971
16th to endDay
15%7%345%2446%6%39%
1980
May1st to 15thDay
14%7%35%6%45%45%7%34%
1990
16th to endDay
10%5%25%6%46%5%6%8%36%
2334
June1st to 15thDay
6%3245%36%6%7%9%44%
2310
16th to endDay
4214435%6%7%12%46%
2310
July1st to 15thDay
7%5%26%6%48%5%7%9%34%
2208
16th to endDay
5%3145%36%6%8%10%43%
2284
August1st to 15thDay
8%314435%5%7%9%46%
2081
16th to endDay
8%4235%35%5%7%11%42%
2100
September1st to 15thDay
12%5%244346%5%7%43%
1980
16th to endDay
13%325%324447%49%
1831
October1st to 15thDay
11%5%24433345%51%
1650
16th to endDay
15%31232233457%
1760
November1st to 15thDay
11%424312347%54%
1688
16th to endDay
17%6%2341233448%
1608
December1st to 15thDay
17%6%15%323345%45%
1440
16th to endDay
17%6%35%324335%43%
1536
January1st to 15thNight
16%6%3432323351%
2327
16th to endNight
14%5%2432323451%
2496
February1st to 15thNight
15%6%25%423325%47%
2238
16th to endNight
13%424423345%51%
1893
March1st to 15thNight
17%6%26%423335%44%
2002
16th to endNight
18%6%25%424345%42%
1909
April1st to 15thNight
9%424424446%52%
1647
16th to endNight
11%4244245%48%48%
1650
May1st to 15thNight
13%5%24425%45%9%41%
1627
16th to endNight
9%5%246%3446%7%45%
1425
June1st to 15thNight
222331445%11%56%
1320
16th to endNight
221243446%11%55%
1320
July1st to 15thNight
5%214446%5%6%11%46%
1419
16th to endNight
321443446%11%53%
1576
August1st to 15thNight
421332446%10%54%
1548
16th to endNight
4314435%5%7%11%47%
1750
September1st to 15thNight
8%6%14434447%49%
1650
16th to endNight
9%424424436%54%
1785
October1st to 15thNight
11%313323346%56%
1980
16th to endNight
13%21331223361%
2112
November1st to 15thNight
10%412323346%56%
2169
16th to endNight
15%423324345%49%
2349
December1st to 15thNight
18%5%24323345%46%
2520
16th to endNight
18%7%2442323444%
2685

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
39%28%27%17%5%
1612
16th to endDay
37%19%27%18%3
1728
February1st to 15thDay
41%210%25%16%2
1617
16th to endDay
43%39%23%16%3
1580
March1st to 15thDay
44%310%20%15%6%
1940
16th to endDay
45%312%24%12%1
1963
April1st to 15thDay
37%39%24%20%3
1971
16th to endDay
43%39%22%18%2
1980
May1st to 15thDay
49%411%17%14%1
1990
16th to endDay
42%6%15%22%10%1
2338
June1st to 15thDay
31%5%14%29%16%1
2310
16th to endDay
27%7%14%29%17%2
2310
July1st to 15thDay
40%6%14%24%11%2
2068
16th to endDay
30%6%16%31%13%2
2129
August1st to 15thDay
30%5%13%29%18%2
2067
16th to endDay
33%5%14%24%17%4
2100
September1st to 15thDay
38%411%20%18%6%
1980
16th to endDay
34%36%23%27%4
1831
October1st to 15thDay
35%37%23%23%7%
1650
16th to endDay
30%2428%26%7%
1760
November1st to 15thDay
32%27%26%23%8%
1688
16th to endDay
40%17%22%22%4
1608
December1st to 15thDay
41%211%24%17%2
1440
16th to endDay
44%310%21%16%3
1536
January1st to 15thNight
39%15%25%24%3
2327
16th to endNight
37%28%27%20%4
2496
February1st to 15thNight
40%19%26%18%4
2247
16th to endNight
35%210%27%17%6%
1893
March1st to 15thNight
44%29%18%19%6%
2002
16th to endNight
43%210%23%18%1
1909
April1st to 15thNight
32%310%24%22%6%
1647
16th to endNight
33%5%10%25%21%3
1650
May1st to 15thNight
39%5%14%21%15%3
1628
16th to endNight
35%5%17%22%15%4
1427
June1st to 15thNight
21%5%15%31%25%1
1320
16th to endNight
23%413%30%21%6%
1320
July1st to 15thNight
30%6%15%29%14%3
1330
16th to endNight
23%5%18%32%17%2
1468
August1st to 15thNight
23%5%15%30%22%2
1538
16th to endNight
29%5%14%28%17%4
1750
September1st to 15thNight
35%310%23%16%10%
1650
16th to endNight
31%37%21%27%8%
1785
October1st to 15thNight
29%38%23%24%9%
1980
16th to endNight
28%25%22%32%9%
2112
November1st to 15thNight
29%27%26%24%9%
2169
16th to endNight
36%26%24%23%5%
2349
December1st to 15thNight
40%211%21%17%5%
2520
16th to endNight
43%19%22%19%3
2685

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
24%15%37%16%41
90
16th to endDay
17%25%40%13%3
96
February1st to 15thDay
14%21%48%11%22
90
16th to endDay
12%24%40%16%41
81
March1st to 15thDay
29%14%37%15%3
85
16th to endDay
17%24%20%29%9%
75
April1st to 15thDay
13%18%33%21%10%1
210
16th to endDay
19%434%22%15%3
210
May1st to 15thDay
13%13%34%25%10%3
247
16th to endDay
14%5%29%27%16%7%
437
June1st to 15thDay
6%320%30%23%14%
420
16th to endDay
4218%34%30%10%
420
July1st to 15thDay
6%217%38%26%9%
400
16th to endDay
5%16%26%37%22%
445
August1st to 15thDay
9%17%26%38%16%
354
16th to endDay
13%15%26%33%19%
268
September1st to 15thDay
9%49%20%38%18%
255
16th to endDay
14%215%20%26%20%
196
October1st to 15thDay
8%5%26%33%21%4
90
16th to endDay
18%329%29%15%4
96
November1st to 15thDay
11%7%28%23%23%5%
90
16th to endDay
36%13%25%13%10%1
90
December1st to 15thDay
18%12%32%20%13%3
90
16th to endDay
23%17%41%15%1
96
January1st to 15thNight
21%18%32%21%5%
900
16th to endNight
18%15%38%25%2
960
February1st to 15thNight
19%17%34%25%3
839
16th to endNight
16%19%36%24%2
631
March1st to 15thNight
21%12%34%29%2
570
16th to endNight
19%11%28%31%8%
528
April1st to 15thNight
12%15%39%23%8%1
494
16th to endNight
13%11%32%32%10%
495
May1st to 15thNight
16%7%29%33%11%1
495
16th to endNight
12%422%33%21%4
515
June1st to 15thNight
5%217%37%34%4
495
16th to endNight
2113%40%37%4
495
July1st to 15thNight
6%29%42%31%7%
465
16th to endNight
45%33%44%11%
522
August1st to 15thNight
5%18%29%45%9%
494
16th to endNight
5%19%34%41%7%
525
September1st to 15thNight
10%213%25%43%4
495
16th to endNight
9%317%31%33%4
572
October1st to 15thNight
13%5%20%28%29%3
660
16th to endNight
14%7%24%33%18%
704
November1st to 15thNight
11%10%27%32%15%1
700
16th to endNight
18%12%31%25%12%
729
December1st to 15thNight
21%11%29%29%7%
900
16th to endNight
23%13%31%26%5%
960
Page generated at 2017-03-15 10:32:37. Version ac04

Copyright 2017 A. Danko


Batesville Clear Sky Chart | Charts Home