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 2018-02-22.

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%
16748
18%
48851
15%
16708
65%
16708
27%
31880

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
47%
777
18%
2522
14%
776
55%
776
24%
1605
January16th to endNight
46%
832
23%
2704
18%
832
55%
832
27%
1650
February1st to 15thNight
52%
761
22%
2293
17%
758
60%
758
33%
1365
February16th to endNight
54%
659
29%
1846
19%
659
64%
659
39%
1068
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%
560
8%
1630
7%
557
79%
557
24%
1126
August16th to endNight
65%
764
6%
1991
5%
764
65%
764
19%
1501
September1st to 15thNight
65%
720
6%
1980
6%
720
65%
720
17%
1529
September16th to endNight
59%
717
8%
1980
9%
717
59%
717
16%
1566
October1st to 15thNight
64%
720
19%
2094
20%
720
64%
720
24%
1421
October16th to endNight
59%
768
22%
2304
20%
768
63%
768
26%
1471
November1st to 15thNight
58%
760
22%
2281
20%
760
63%
760
29%
1451
November16th to endNight
54%
780
25%
2340
21%
780
60%
780
28%
1506
December1st to 15thNight
55%
780
22%
2516
21%
780
61%
780
24%
1613
December16th to endNight
60%
832
22%
2704
22%
832
64%
832
29%
1627

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%425%6%36%6%7%10%36%
49381
Night
7%5%25%5%35%6%7%9%40%
49060
TransparencyDay
40%11%15%16%12%3
49082
Night
36%10%16%19%12%4
48863
SeeingDay
8%213%23%26%25%
6497
Night
10%215%29%31%11%
16757

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%25%5%36%6%7%8%35%
1746
16th to endDay
9%5%24435%5%6%8%44%
1872
February1st to 15thDay
8%5%24435%46%9%45%
1887
16th to endDay
8%424425%46%7%49%
1773
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%425%6%47%8%9%14%29%
2305
16th to endDay
9%5%36%7%5%7%7%8%12%25%
2208
September1st to 15thDay
7%437%7%5%7%8%11%12%26%
1980
16th to endDay
10%7%37%7%6%8%8%8%9%21%
1980
October1st to 15thDay
9%5%26%7%47%7%8%10%29%
1863
16th to endDay
11%5%25%5%345%6%8%40%
1920
November1st to 15thDay
6%416%7%36%6%7%8%40%
1907
16th to endDay
8%5%35%6%35%5%7%9%38%
1950
December1st to 15thDay
10%5%36%5%35%6%6%8%38%
1771
16th to endDay
7%425%5%37%6%6%9%41%
1872
January1st to 15thNight
10%6%25%5%35%5%6%9%39%
2522
16th to endNight
9%5%35%5%25%5%5%8%41%
2704
February1st to 15thNight
10%5%24423448%49%
2293
16th to endNight
7%32332446%8%53%
1846
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%
1641
16th to endNight
9%6%36%6%5%5%7%7%10%30%
1991
September1st to 15thNight
7%6%36%8%5%7%8%9%10%26%
1980
16th to endNight
9%7%310%8%5%6%7%7%9%22%
1980
October1st to 15thNight
8%7%26%6%35%7%7%9%34%
2094
16th to endNight
11%7%24425%5%6%9%38%
2304
November1st to 15thNight
6%436%7%37%5%5%8%41%
2281
16th to endNight
10%6%35%5%35%6%6%9%39%
2340
December1st to 15thNight
7%5%36%6%45%6%5%8%40%
2516
16th to endNight
6%425%5%25%6%7%10%43%
2704

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
42%9%9%17%16%4
1747
16th to endDay
36%6%9%18%21%7%
1872
February1st to 15thDay
36%7%10%16%20%9%
1889
16th to endDay
32%8%13%17%20%7%
1773
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
39%20%27%11%
2292
16th to endDay
48%20%21%9%1
2208
September1st to 15thDay
45%18%21%11%2
1980
16th to endDay
52%15%17%10%4
1980
October1st to 15thDay
44%11%12%15%12%3
1863
16th to endDay
39%6%11%13%21%7%
1920
November1st to 15thDay
37%8%12%19%16%5%
1907
16th to endDay
39%8%10%16%16%8%
1950
December1st to 15thDay
43%8%11%18%13%5%
1771
16th to endDay
35%10%13%19%14%5%
1872
January1st to 15thNight
39%8%12%19%14%5%
2522
16th to endNight
37%5%11%21%15%8%
2704
February1st to 15thNight
32%6%11%19%19%10%
2302
16th to endNight
27%7%14%22%21%6%
1846
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%17%33%13%
1630
16th to endNight
44%16%26%12%
1991
September1st to 15thNight
45%18%21%12%2
1980
16th to endNight
52%14%16%12%31
1980
October1st to 15thNight
40%10%14%15%15%3
2094
16th to endNight
38%7%11%14%20%7%
2304
November1st to 15thNight
37%7%12%19%17%5%
2281
16th to endNight
38%7%10%18%16%8%
2340
December1st to 15thNight
40%7%12%22%11%6%
2516
16th to endNight
32%9%16%23%13%5%
2704

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
20%7%36%21%11%2
135
16th to endDay
13%9%36%25%13%2
144
February1st to 15thDay
5%6%27%35%19%5%
135
16th to endDay
12%326%35%18%3
230
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%28%52%
313
16th to endDay
11%412%24%47%
332
September1st to 15thDay
9%1413%24%46%
315
16th to endDay
13%416%28%36%
314
October1st to 15thDay
14%19%25%35%13%
315
16th to endDay
12%223%30%23%8%
336
November1st to 15thDay
6%116%34%30%10%
325
16th to endDay
8%320%40%24%3
330
December1st to 15thDay
9%5%25%39%15%5%
151
16th to endDay
7%312%37%29%9%
144
January1st to 15thNight
14%5%25%31%20%2
780
16th to endNight
10%6%27%38%15%
832
February1st to 15thNight
11%5%23%38%18%1
764
16th to endNight
9%227%40%19%1
659
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%
560
16th to endNight
12%1411%40%30%
764
September1st to 15thNight
10%5%11%44%28%
720
16th to endNight
12%15%15%44%21%
717
October1st to 15thNight
13%17%27%40%9%
720
16th to endNight
16%112%28%33%6%
768
November1st to 15thNight
8%218%35%29%5%
760
16th to endNight
12%322%35%23%3
780
December1st to 15thNight
9%421%35%25%2
780
16th to endNight
7%320%34%30%3
832
Page generated at 2018-02-23 11:21:34. Version ac04

Copyright 2018 A. Danko


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