Palm Bay
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Palm Bay clear sky chart from 2005-11-05 to 2017-08-12.

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 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
61%
15970
18%
46526
15%
15930
65%
15930
27%
30435

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
49%
717
18%
2327
14%
716
56%
716
24%
1476
January16th to endNight
47%
768
23%
2496
18%
768
56%
768
28%
1518
February1st to 15thNight
50%
701
23%
2112
17%
698
59%
698
33%
1254
February16th to endNight
52%
631
26%
1767
16%
631
62%
631
38%
1038
March1st to 15thNight
54%
720
28%
1980
18%
720
63%
720
40%
1146
March16th to endNight
61%
768
22%
2112
18%
768
65%
768
39%
1249
April1st to 15thNight
63%
718
22%
1970
19%
718
66%
718
41%
1132
April16th to endNight
67%
720
24%
1800
15%
720
70%
720
39%
1114
May1st to 15thNight
71%
677
24%
1757
17%
677
73%
677
40%
1073
May16th to endNight
72%
561
18%
1682
14%
561
73%
561
28%
1095
June1st to 15thNight
67%
540
11%
1620
9%
540
67%
540
20%
1167
June16th to endNight
75%
540
10%
1620
9%
540
75%
540
21%
1156
July1st to 15thNight
71%
510
7%
1530
6%
510
71%
510
18%
1119
July16th to endNight
77%
564
9%
1595
8%
531
78%
531
23%
1130
August1st to 15thNight
79%
546
8%
1594
7%
543
79%
543
24%
1102
August16th to endNight
64%
700
6%
1824
4%
700
64%
700
19%
1385
September1st to 15thNight
66%
660
6%
1815
6%
660
66%
660
17%
1399
September16th to endNight
58%
657
8%
1815
8%
657
58%
657
15%
1449
October1st to 15thNight
65%
660
20%
1919
21%
660
65%
660
25%
1280
October16th to endNight
59%
704
21%
2112
19%
704
64%
704
26%
1344
November1st to 15thNight
57%
700
23%
2101
21%
700
62%
700
28%
1343
November16th to endNight
52%
720
24%
2160
19%
720
58%
720
27%
1404
December1st to 15thNight
54%
720
22%
2322
21%
720
58%
720
23%
1525
December16th to endNight
58%
768
20%
2496
20%
768
62%
768
27%
1537

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
8%426%6%46%6%7%10%36%
47427
Night
7%5%25%5%35%6%7%9%40%
46735
TransparencyDay
40%11%15%16%12%3
47128
Night
36%10%16%19%12%4
46538
SeeingDay
8%213%22%26%26%
5798
Night
9%215%29%31%11%
15979

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
11%6%35%5%36%6%7%8%35%
1611
16th to endDay
9%6%244245%6%8%44%
1728
February1st to 15thDay
9%6%24435%45%8%45%
1738
16th to endDay
8%424425%46%7%48%
1706
March1st to 15thDay
6%315%435%46%9%48%
1980
16th to endDay
7%325%435%5%5%9%47%
2111
April1st to 15thDay
5%324436%5%7%9%47%
1978
16th to endDay
5%3145%35%6%6%10%44%
2160
May1st to 15thDay
43145%35%5%7%9%48%
2202
16th to endDay
7%327%5%5%6%7%8%10%33%
2431
June1st to 15thDay
9%7%26%7%47%8%7%11%25%
2340
16th to endDay
6%426%8%48%7%9%12%29%
2340
July1st to 15thDay
8%5%37%6%36%8%9%13%26%
2340
16th to endDay
9%426%7%47%9%9%12%27%
2465
August1st to 15thDay
5%426%6%47%8%9%14%28%
2256
16th to endDay
9%5%36%7%5%7%7%9%13%23%
2023
September1st to 15thDay
6%437%7%5%6%8%11%12%26%
1815
16th to endDay
10%7%37%8%6%9%8%8%9%20%
1815
October1st to 15thDay
8%5%26%7%47%6%8%9%31%
1708
16th to endDay
11%5%25%5%345%6%8%40%
1760
November1st to 15thDay
6%416%7%36%6%7%8%40%
1757
16th to endDay
8%5%35%6%36%6%7%10%36%
1800
December1st to 15thDay
11%6%46%5%36%6%6%8%35%
1635
16th to endDay
7%425%5%37%6%7%9%40%
1728
January1st to 15thNight
9%5%35%5%35%5%6%9%39%
2327
16th to endNight
9%5%35%5%25%45%8%42%
2496
February1st to 15thNight
10%5%25%313447%50%
2112
16th to endNight
7%42332446%8%51%
1767
March1st to 15thNight
44245%2445%8%53%
1980
16th to endNight
6%323435%5%7%8%49%
2112
April1st to 15thNight
5%21442446%9%53%
1970
16th to endNight
6%414435%5%6%9%48%
1800
May1st to 15thNight
5%3234245%6%8%52%
1757
16th to endNight
6%425%447%5%8%13%37%
1682
June1st to 15thNight
10%7%35%7%48%6%8%11%27%
1620
16th to endNight
6%425%6%47%8%8%12%32%
1620
July1st to 15thNight
9%5%26%6%37%7%8%11%31%
1620
16th to endNight
45%36%5%46%7%8%10%36%
1703
August1st to 15thNight
44145%5%6%8%10%13%34%
1605
16th to endNight
9%6%37%6%5%6%7%7%11%29%
1824
September1st to 15thNight
6%6%36%7%5%7%8%9%11%25%
1815
16th to endNight
9%8%311%8%5%6%7%7%9%21%
1815
October1st to 15thNight
9%7%25%6%35%6%7%9%36%
1919
16th to endNight
11%7%24435%5%6%9%39%
2112
November1st to 15thNight
6%5%36%7%37%5%5%8%41%
2101
16th to endNight
11%6%35%5%35%5%6%9%37%
2160
December1st to 15thNight
8%6%36%6%46%6%5%8%37%
2322
16th to endNight
6%425%6%26%6%7%9%41%
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
41%10%9%17%15%4
1612
16th to endDay
35%6%9%18%21%8%
1728
February1st to 15thDay
36%6%9%16%21%10%
1740
16th to endDay
33%8%13%17%19%7%
1706
March1st to 15thDay
31%6%13%25%17%5%
1980
16th to endDay
33%7%15%19%19%5%
2112
April1st to 15thDay
30%8%15%22%19%3
1978
16th to endDay
33%7%13%19%21%5%
2160
May1st to 15thDay
30%8%13%22%18%6%
2202
16th to endDay
40%12%14%18%12%
2435
June1st to 15thDay
49%12%17%16%3
2340
16th to endDay
45%15%21%14%3
2340
July1st to 15thDay
44%18%23%11%
2201
16th to endDay
44%18%21%13%1
2310
August1st to 15thDay
40%20%27%11%
2243
16th to endDay
48%20%21%8%
2023
September1st to 15thDay
45%19%20%11%3
1815
16th to endDay
53%15%16%9%4
1815
October1st to 15thDay
43%10%12%15%13%4
1708
16th to endDay
39%6%11%13%23%6%
1760
November1st to 15thDay
37%7%12%19%17%5%
1757
16th to endDay
40%8%10%15%15%9%
1800
December1st to 15thDay
45%8%11%16%13%4
1635
16th to endDay
37%10%13%18%15%5%
1728
January1st to 15thNight
38%8%13%19%14%5%
2327
16th to endNight
37%5%11%21%15%8%
2496
February1st to 15thNight
33%5%9%19%20%11%
2121
16th to endNight
28%7%15%22%20%6%
1767
March1st to 15thNight
27%6%12%29%19%5%
1980
16th to endNight
28%7%15%22%18%7%
2112
April1st to 15thNight
26%7%17%24%19%5%
1970
16th to endNight
29%6%15%21%21%4
1800
May1st to 15thNight
27%8%12%26%18%6%
1758
16th to endNight
34%12%16%22%13%
1684
June1st to 15thNight
44%12%21%17%4
1620
16th to endNight
39%15%21%18%3
1620
July1st to 15thNight
41%17%23%15%1
1530
16th to endNight
35%18%28%15%1
1595
August1st to 15thNight
34%18%34%13%
1594
16th to endNight
44%16%26%11%
1824
September1st to 15thNight
45%18%22%11%2
1815
16th to endNight
52%14%14%12%31
1815
October1st to 15thNight
39%10%15%15%15%3
1919
16th to endNight
38%7%11%15%20%6%
2112
November1st to 15thNight
38%7%11%18%18%5%
2101
16th to endNight
39%6%10%17%15%8%
2160
December1st to 15thNight
43%6%11%21%11%5%
2322
16th to endNight
34%9%15%20%13%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
23%428%22%16%4
90
16th to endDay
16%12%31%17%18%3
96
February1st to 15thDay
6%8%28%30%18%6%
90
16th to endDay
13%428%36%15%1
207
March1st to 15thDay
6%425%37%20%4
270
16th to endDay
7%5%24%25%28%8%
288
April1st to 15thDay
2126%30%28%8%
270
16th to endDay
7%12%33%30%16%
270
May1st to 15thDay
3212%28%33%20%
288
16th to endDay
9%6%19%32%30%
331
June1st to 15thDay
11%16%19%24%37%
315
16th to endDay
7%110%26%53%
315
July1st to 15thDay
5%7%31%54%
305
16th to endDay
8%1311%24%50%
326
August1st to 15thDay
6%39%27%52%
297
16th to endDay
10%310%23%51%
268
September1st to 15thDay
8%1313%23%50%
255
16th to endDay
14%5%12%27%40%
254
October1st to 15thDay
12%19%25%36%15%
255
16th to endDay
13%120%27%25%10%
272
November1st to 15thDay
6%116%33%30%12%
265
16th to endDay
8%423%36%24%3
270
December1st to 15thDay
14%426%37%13%3
105
16th to endDay
9%5%12%36%29%7%
96
January1st to 15thNight
13%5%23%31%22%3
720
16th to endNight
11%6%26%37%17%
768
February1st to 15thNight
12%5%25%37%17%1
704
16th to endNight
9%229%41%17%
631
March1st to 15thNight
7%328%41%16%2
720
16th to endNight
8%222%39%25%1
768
April1st to 15thNight
5%220%41%27%1
718
16th to endNight
7%215%44%26%2
720
May1st to 15thNight
7%110%44%30%4
678
16th to endNight
7%16%26%45%12%
563
June1st to 15thNight
10%1419%46%16%
540
16th to endNight
7%1211%46%29%
540
July1st to 15thNight
9%39%43%33%
510
16th to endNight
6%7%46%37%
564
August1st to 15thNight
6%26%47%36%
546
16th to endNight
13%1410%40%30%
700
September1st to 15thNight
10%5%11%44%28%
660
16th to endNight
13%15%15%43%21%
657
October1st to 15thNight
13%16%28%41%9%
660
16th to endNight
16%112%26%35%6%
704
November1st to 15thNight
8%219%34%29%6%
700
16th to endNight
12%323%34%22%4
720
December1st to 15thNight
10%5%21%36%24%2
720
16th to endNight
7%321%34%29%3
768
Page generated at 2017-08-13 14:16:54. Version ac04

Copyright 2017 A. Danko


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