Independence Creek Campground
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Independence Creek Campground clear sky chart from 2005-11-06 to 2024-01-13.

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
63%
23772
39%
74424
28%
23735
76%
23735
67%
29983

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 10thNight
52%
756
33%
2646
20%
756
72%
756
61%
1007
January11th to 20thNight
52%
732
36%
2531
23%
732
73%
732
63%
970
January21st to endNight
48%
792
41%
2537
25%
792
69%
792
53%
1119
February1st to 10thNight
51%
720
39%
2160
24%
720
70%
720
64%
907
February11th to 20thNight
53%
700
40%
2098
28%
700
71%
700
60%
913
February21st to endNight
43%
592
39%
1776
27%
592
63%
592
63%
762
March1st to 10thNight
50%
720
35%
2160
20%
720
72%
720
65%
903
March11th to 20thNight
52%
720
37%
2108
24%
720
70%
720
66%
898
March21st to endNight
47%
792
40%
1980
15%
792
66%
792
63%
982
April1st to 10thNight
52%
720
38%
1800
16%
720
64%
720
68%
866
April11th to 20thNight
47%
711
40%
1779
13%
711
62%
711
71%
816
April21st to endNight
54%
720
38%
1800
15%
720
64%
720
74%
825
May1st to 10thNight
52%
576
36%
1656
18%
576
62%
576
65%
711
May11th to 20thNight
62%
531
39%
1594
26%
531
71%
531
69%
632
May21st to endNight
59%
524
33%
1688
23%
524
70%
524
63%
679
June1st to 10thNight
73%
360
37%
1440
37%
360
85%
360
69%
465
June11th to 20thNight
76%
360
40%
1440
43%
360
85%
360
72%
453
June21st to endNight
81%
360
40%
1440
43%
360
91%
360
78%
422
July1st to 10thNight
92%
350
40%
1400
49%
350
94%
350
76%
426
July11th to 20thNight
91%
348
39%
1392
47%
348
93%
348
69%
455
July21st to endNight
89%
474
40%
1564
39%
448
91%
448
62%
610
August1st to 10thNight
83%
716
37%
1780
25%
712
84%
712
75%
831
August11th to 20thNight
87%
712
41%
1780
24%
712
89%
712
84%
782
August21st to endNight
90%
792
46%
1980
29%
792
91%
792
86%
856
September1st to 10thNight
86%
720
46%
1800
32%
720
89%
720
86%
769
September11th to 20thNight
81%
720
49%
1915
37%
720
88%
720
83%
800
September21st to endNight
79%
720
47%
1980
38%
720
88%
720
83%
800
October1st to 10thNight
71%
720
45%
1980
34%
720
83%
720
80%
815
October11th to 20thNight
73%
720
46%
2143
41%
720
84%
720
76%
842
October21st to endNight
69%
792
46%
2470
40%
792
83%
792
76%
912
November1st to 10thNight
69%
740
43%
2405
36%
740
84%
740
79%
854
November11th to 20thNight
65%
760
44%
2470
33%
760
83%
760
77%
878
November21st to endNight
59%
760
41%
2470
30%
760
76%
760
67%
966
December1st to 10thNight
55%
760
39%
2470
26%
760
72%
760
61%
1005
December11th to 20thNight
48%
758
34%
3077
22%
758
68%
758
48%
1247
December21st to endNight
45%
824
23%
4715
21%
817
66%
817
35%
1805

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
1212222347%75%
74835
Night
1112212346%78%
74917
TransparencyDay
11%25%19%30%32%
74545
Night
10%27%21%32%27%
74729
SeeingDay
312%34%31%16%4
14084
Night
1429%39%23%3
23796

By Month

Percentage Cloud Cover SW (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 10thDay
111221235%9%73%
1519
11th to 20thDay
21222335%9%71%
1482
21st to endDay
2313323348%69%
1817
February1st to 10thDay
121211225%7%76%
1800
11th to 20thDay
121232346%8%69%
1750
21st to endDay
1312122246%74%
1480
March1st to 10thDay
1112222449%71%
1800
11th to 20thDay
21232336%10%68%
1846
21st to endDay
211223348%74%
2376
April1st to 10thDay
1212212347%74%
2160
11th to 20thDay
1111222347%77%
2129
21st to endDay
111212347%77%
2160
May1st to 10thDay
1212222346%76%
2302
11th to 20thDay
2212323346%73%
2301
21st to endDay
121332345%7%68%
2584
June1st to 10thDay
111232335%7%72%
2520
11th to 20thDay
1112112235%82%
2520
21st to endDay
11121234480%
2520
July1st to 10thDay
1213323435%74%
2520
11th to 20thDay
221333445%5%68%
2520
21st to endDay
322443445%7%63%
2654
August1st to 10thDay
211222444475%
2149
11th to 20thDay
1112223336%77%
2122
21st to endDay
1112222335%79%
2376
September1st to 10thDay
1112213345%78%
2160
11th to 20thDay
11121223483%
2044
21st to endDay
11111223484%
1980
October1st to 10thDay
111112235%82%
1980
11th to 20thDay
112112135%83%
1814
21st to endDay
11237%84%
1886
November1st to 10thDay
11111237%83%
1674
11th to 20thDay
111136%86%
1710
21st to endDay
211112347%77%
1710
December1st to 10thDay
1112212248%77%
1710
11th to 20thDay
141332335%9%67%
1966
21st to endDay
241332335%10%64%
2794
January1st to 10thNight
121222349%74%
2646
11th to 20thNight
112212447%76%
2531
21st to endNight
2313312346%72%
2537
February1st to 10thNight
22223248%76%
2160
11th to 20thNight
1213212336%75%
2098
21st to endNight
1213222347%74%
1776
March1st to 10thNight
11221135%9%74%
2160
11th to 20thNight
121221245%10%71%
2108
21st to endNight
1212212447%74%
1980
April1st to 10thNight
1212212236%78%
1800
11th to 20thNight
1111112346%79%
1779
21st to endNight
1111112235%82%
1800
May1st to 10thNight
1212212347%75%
1656
11th to 20thNight
1111222336%79%
1594
21st to endNight
1112212335%77%
1688
June1st to 10thNight
11111235%6%78%
1440
11th to 20thNight
111111235%83%
1440
21st to endNight
11213389%
1440
July1st to 10thNight
111235%84%
1440
11th to 20thNight
1111113345%79%
1440
21st to endNight
1111223445%75%
1656
August1st to 10thNight
1112212235%80%
1790
11th to 20thNight
1111122387%
1780
21st to endNight
1111122487%
1980
September1st to 10thNight
11212290%
1800
11th to 20thNight
111123486%
1915
21st to endNight
1111222486%
1980
October1st to 10thNight
111112235%84%
1980
11th to 20thNight
21111225%85%
2143
21st to endNight
111123486%
2470
November1st to 10thNight
11111125%87%
2405
11th to 20thNight
11111235%86%
2470
21st to endNight
211111337%78%
2470
December1st to 10thNight
1212213347%74%
2470
11th to 20thNight
212325%35%9%68%
3233
21st to endNight
431332346%10%62%
4862

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 10thDay
12%312%34%31%8%
1519
11th to 20thDay
13%211%28%31%16%
1482
21st to endDay
16%38%26%33%13%
1817
February1st to 10thDay
11%210%28%31%20%
1800
11th to 20thDay
14%26%24%34%19%
1760
21st to endDay
13%28%29%32%16%
1480
March1st to 10thDay
12%28%27%33%18%
1800
11th to 20thDay
13%27%29%30%18%
1846
21st to endDay
11%29%31%32%15%
2376
April1st to 10thDay
12%28%31%28%20%
2160
11th to 20thDay
9%27%22%36%23%
2132
21st to endDay
9%26%28%37%18%
2160
May1st to 10thDay
10%25%21%40%22%
2302
11th to 20thDay
13%3418%40%22%
2304
21st to endDay
16%35%19%38%19%
2584
June1st to 10thDay
11%25%15%31%35%
2520
11th to 20thDay
8%128%26%54%
2520
21st to endDay
9%215%21%62%
2520
July1st to 10thDay
13%326%14%63%
2451
11th to 20thDay
16%439%19%49%
2445
21st to endDay
18%4414%20%41%
2506
August1st to 10thDay
12%327%18%58%
2135
11th to 20thDay
9%326%24%56%
2122
21st to endDay
9%315%21%61%
2376
September1st to 10thDay
11%216%19%60%
2160
11th to 20thDay
7%2110%29%51%
2044
21st to endDay
7%119%38%43%
1980
October1st to 10thDay
8%1215%33%40%
1980
11th to 20thDay
9%2211%38%38%
1814
21st to endDay
5%1217%44%30%
1886
November1st to 10thDay
6%16%19%41%26%
1674
11th to 20thDay
416%25%44%20%
1710
21st to endDay
9%26%26%33%24%
1710
December1st to 10thDay
9%313%28%29%19%
1710
11th to 20thDay
18%312%25%29%12%
1966
21st to endDay
20%214%32%22%10%
2794
January1st to 10thNight
11%215%32%30%10%
2646
11th to 20thNight
11%211%31%32%13%
2531
21st to endNight
16%310%24%35%13%
2537
February1st to 10thNight
11%210%28%31%18%
2160
11th to 20thNight
13%25%26%36%18%
2099
21st to endNight
12%38%25%38%14%
1776
March1st to 10thNight
10%38%32%30%18%
2160
11th to 20thNight
11%27%27%38%15%
2108
21st to endNight
14%29%32%32%11%
1980
April1st to 10thNight
11%210%29%32%16%
1800
11th to 20thNight
9%26%26%38%20%
1779
21st to endNight
9%26%29%40%15%
1800
May1st to 10thNight
12%26%23%39%19%
1656
11th to 20thNight
9%26%22%40%21%
1595
21st to endNight
11%29%20%40%18%
1688
June1st to 10thNight
8%27%17%36%31%
1440
11th to 20thNight
7%1413%28%48%
1440
21st to endNight
5%25%26%61%
1440
July1st to 10thNight
6%228%19%64%
1400
11th to 20thNight
8%2412%23%51%
1392
21st to endNight
13%26%14%25%40%
1564
August1st to 10thNight
10%239%22%54%
1780
11th to 20thNight
5%227%29%55%
1780
21st to endNight
5%117%28%59%
1980
September1st to 10thNight
5%117%26%60%
1800
11th to 20thNight
5%1112%31%50%
1915
21st to endNight
5%1112%33%48%
1980
October1st to 10thNight
6%2417%32%39%
1980
11th to 20thNight
8%1214%41%35%
2143
21st to endNight
5%2415%42%33%
2470
November1st to 10thNight
6%16%19%41%26%
2405
11th to 20thNight
7%19%23%39%23%
2470
21st to endNight
10%27%23%37%21%
2470
December1st to 10thNight
12%39%31%27%18%
2470
11th to 20thNight
16%313%30%26%11%
3233
21st to endNight
21%215%27%25%9%
4862

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 10thDay
5%11%42%29%12%1
180
11th to 20thDay
213%39%23%20%4
190
21st to endDay
5%18%29%30%16%2
390
February1st to 10thDay
416%36%30%12%2
420
11th to 20thDay
6%15%40%30%8%1
415
21st to endDay
6%14%47%25%6%1
346
March1st to 10thDay
415%46%26%8%1
420
11th to 20thDay
415%35%30%13%2
420
21st to endDay
419%47%23%6%
462
April1st to 10thDay
5%20%35%26%12%2
420
11th to 20thDay
6%21%39%27%6%1
412
21st to endDay
318%38%27%10%4
420
May1st to 10thDay
6%14%39%29%10%2
423
11th to 20thDay
5%14%33%30%14%3
448
21st to endDay
5%16%29%31%17%2
485
June1st to 10thDay
311%30%32%18%6%
450
11th to 20thDay
312%31%30%20%4
450
21st to endDay
10%32%35%17%5%
450
July1st to 10thDay
26%34%36%17%5%
446
11th to 20thDay
2423%39%24%9%
444
21st to endDay
4328%36%23%6%
487
August1st to 10thDay
28%35%32%19%4
447
11th to 20thDay
28%27%36%21%5%
437
21st to endDay
1433%35%21%5%
495
September1st to 10thDay
37%30%34%20%6%
450
11th to 20thDay
310%33%35%16%3
450
21st to endDay
9%33%33%20%4
450
October1st to 10thDay
214%32%31%17%4
450
11th to 20thDay
210%32%33%20%3
450
21st to endDay
112%30%32%20%5%
401
November1st to 10thDay
17%34%29%24%5%
270
11th to 20thDay
28%30%34%21%4
270
21st to endDay
110%30%34%20%5%
270
December1st to 10thDay
27%39%39%12%2
270
11th to 20thDay
11%39%29%17%4
198
21st to endDay
217%38%24%17%2
198
January1st to 10thNight
27%36%33%18%4
760
11th to 20thNight
1442%36%15%2
732
21st to endNight
48%38%33%14%3
792
February1st to 10thNight
26%39%34%15%4
720
11th to 20thNight
38%34%39%15%2
704
21st to endNight
36%46%33%11%2
592
March1st to 10thNight
16%41%37%13%3
720
11th to 20thNight
15%38%32%20%4
720
21st to endNight
36%41%35%14%1
792
April1st to 10thNight
36%36%38%16%1
720
11th to 20thNight
28%41%30%17%3
711
21st to endNight
16%39%33%20%2
720
May1st to 10thNight
26%38%35%16%3
576
11th to 20thNight
15%30%42%22%2
531
21st to endNight
26%31%39%20%2
526
June1st to 10thNight
1322%47%23%5%
360
11th to 20thNight
1220%50%24%4
360
21st to endNight
115%53%29%1
360
July1st to 10thNight
15%47%44%4
350
11th to 20thNight
1449%42%3
348
21st to endNight
16%47%43%3
474
August1st to 10thNight
1111%55%29%2
716
11th to 20thNight
1110%48%38%4
712
21st to endNight
17%45%45%2
792
September1st to 10thNight
1110%47%38%4
720
11th to 20thNight
1114%49%30%5%
720
21st to endNight
1117%38%34%8%
720
October1st to 10thNight
1225%40%28%4
720
11th to 20thNight
1320%44%28%5%
720
21st to endNight
6%24%35%26%9%
792
November1st to 10thNight
1227%37%26%7%
740
11th to 20thNight
1329%41%19%6%
760
21st to endNight
3334%37%20%3
760
December1st to 10thNight
2435%41%16%3
760
11th to 20thNight
1444%34%14%2
760
21st to endNight
17%44%32%15%1
836
Page generated at 2024-01-10 07:16:13. Version ac07

Copyright 2024 Attilla Danko


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