Caspers Wilderness Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Caspers Wilderness Park 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
74%
24698
29%
74239
27%
24646
77%
24646
40%
41231

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
65%
756
29%
2457
29%
756
69%
756
39%
1296
January11th to 20thNight
69%
728
35%
2244
33%
728
74%
728
42%
1178
January21st to endNight
63%
792
35%
2376
30%
792
70%
792
40%
1295
February1st to 10thNight
71%
720
34%
2160
34%
720
75%
720
44%
1136
February11th to 20thNight
66%
700
31%
2098
30%
700
72%
700
39%
1169
February21st to endNight
61%
592
27%
1776
29%
592
64%
592
34%
1045
March1st to 10thNight
63%
720
24%
2160
26%
720
67%
720
34%
1266
March11th to 20thNight
67%
720
24%
2102
26%
720
69%
720
37%
1232
March21st to endNight
68%
792
26%
2008
20%
792
71%
792
42%
1211
April1st to 10thNight
67%
720
24%
1800
18%
720
69%
720
38%
1142
April11th to 20thNight
67%
711
28%
1779
19%
711
69%
711
44%
1064
April21st to endNight
72%
720
26%
1800
16%
720
73%
720
41%
1114
May1st to 10thNight
69%
635
22%
1715
15%
635
70%
635
35%
1077
May11th to 20thNight
71%
531
20%
1595
16%
531
72%
531
30%
1020
May21st to endNight
68%
582
22%
1746
18%
582
69%
582
33%
1081
June1st to 10thNight
71%
540
17%
1620
14%
540
71%
540
25%
1119
June11th to 20thNight
81%
540
24%
1620
21%
540
81%
540
38%
947
June21st to endNight
86%
364
26%
1444
32%
364
86%
364
32%
741
July1st to 10thNight
86%
371
25%
1421
28%
371
86%
371
35%
711
July11th to 20thNight
88%
522
25%
1566
22%
522
88%
522
46%
838
July21st to endNight
86%
726
26%
1802
19%
686
86%
686
45%
1035
August1st to 10thNight
87%
716
28%
1780
18%
712
87%
712
51%
1001
August11th to 20thNight
91%
712
33%
1780
21%
712
91%
712
55%
972
August21st to endNight
89%
792
35%
1980
24%
792
89%
792
56%
1067
September1st to 10thNight
84%
720
35%
1800
28%
720
84%
720
52%
1012
September11th to 20thNight
87%
720
37%
1966
35%
720
87%
720
57%
981
September21st to endNight
85%
720
38%
1980
37%
720
87%
720
56%
989
October1st to 10thNight
82%
720
34%
1980
33%
720
83%
720
53%
1012
October11th to 20thNight
79%
720
37%
2026
37%
720
80%
720
50%
1055
October21st to endNight
77%
792
37%
2439
39%
792
80%
792
50%
1173
November1st to 10thNight
80%
740
33%
2405
37%
740
82%
740
47%
1140
November11th to 20thNight
81%
760
36%
2470
40%
760
83%
760
50%
1166
November21st to endNight
70%
760
31%
2470
34%
760
73%
760
39%
1296
December1st to 10thNight
68%
760
30%
2470
31%
760
72%
760
37%
1326
December11th to 20thNight
62%
760
28%
2962
32%
759
67%
759
26%
1767
December21st to endNight
60%
824
19%
4442
29%
817
67%
817
20%
2557

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
5%423323346%64%
75131
Night
6%5%24423447%60%
74607
TransparencyDay
21%5%8%19%25%22%
74863
Night
27%6%8%16%21%23%
74398
SeeingDay
6%5%20%36%24%8%
14617
Night
7%29%31%39%12%
24720

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
10%5%24324448%55%
1708
11th to 20thDay
8%42442445%460%
1755
21st to endDay
10%5%2432335%5%58%
1980
February1st to 10thDay
9%424323346%60%
1800
11th to 20thDay
9%333323348%58%
1750
21st to endDay
10%6%25%434446%54%
1480
March1st to 10thDay
9%6%24435%5%5%8%48%
1800
11th to 20thDay
7%42442346%10%54%
1856
21st to endDay
5%42433446%8%57%
2344
April1st to 10thDay
7%5%244245%5%7%55%
2160
11th to 20thDay
45%23333445%63%
2129
21st to endDay
6%323313348%65%
2160
May1st to 10thDay
6%6%2432345%8%57%
2243
11th to 20thDay
342442445%8%60%
2301
21st to endDay
5%6%2442346%9%55%
2530
June1st to 10thDay
5%42432335%8%61%
2340
11th to 20thDay
3413323335%70%
2340
21st to endDay
1312322235%76%
2503
July1st to 10thDay
1213213346%75%
2484
11th to 20thDay
121222335%6%74%
2340
21st to endDay
211233345%7%69%
2405
August1st to 10thDay
1212212246%77%
2149
11th to 20thDay
1111212235%80%
2122
21st to endDay
111222234477%
2376
September1st to 10thDay
2212212335%77%
2160
11th to 20thDay
221221233479%
1994
21st to endDay
1212213335%77%
1980
October1st to 10thDay
4322312446%67%
1980
11th to 20thDay
6%312223445%70%
1930
21st to endDay
4313223445%70%
1913
November1st to 10thDay
4322223345%70%
1674
11th to 20thDay
5%21332445%6%67%
1710
21st to endDay
6%4233235%6%7%58%
1710
December1st to 10thDay
8%5%1342446%8%56%
1710
11th to 20thDay
13%6%36%5%3445%7%43%
2169
21st to endDay
12%8%26%6%45%5%5%6%41%
3146
January1st to 10thNight
10%5%2342445%8%54%
2457
11th to 20thNight
8%5%24423447%58%
2244
21st to endNight
10%6%23313246%60%
2376
February1st to 10thNight
7%423413345%63%
2160
11th to 20thNight
9%6%23433346%59%
2098
21st to endNight
12%7%345%24435%52%
1776
March1st to 10thNight
9%7%3443346%8%47%
2160
11th to 20thNight
8%7%3442345%7%54%
2102
21st to endNight
7%6%2442446%7%55%
2008
April1st to 10thNight
8%7%25%43445%8%50%
1800
11th to 20thNight
5%7%24433336%59%
1779
21st to endNight
6%6%24423447%58%
1800
May1st to 10thNight
48%36%4235%5%8%53%
1715
11th to 20thNight
37%46%5%335%6%9%50%
1594
21st to endNight
49%45%423338%54%
1746
June1st to 10thNight
37%35%4345%7%9%50%
1620
11th to 20thNight
1335%42345%7%63%
1620
21st to endNight
2312223348%69%
1444
July1st to 10thNight
111332347%8%66%
1462
11th to 20thNight
12133235%6%8%67%
1620
21st to endNight
22134245%6%7%63%
1908
August1st to 10thNight
3212223346%71%
1790
11th to 20thNight
1112313447%74%
1780
21st to endNight
121221235%6%74%
1980
September1st to 10thNight
231332245%5%70%
1800
11th to 20thNight
231222323378%
1966
21st to endNight
241221232477%
1980
October1st to 10thNight
431232345%6%67%
1980
11th to 20thNight
5%42331233470%
2026
21st to endNight
4423323336%68%
2439
November1st to 10thNight
4422323237%69%
2405
11th to 20thNight
4413323336%68%
2470
21st to endNight
6%5%2443445%8%55%
2470
December1st to 10thNight
8%5%25%42345%7%56%
2470
11th to 20thNight
13%8%35%42345%8%45%
3041
21st to endNight
11%8%36%6%35%5%46%42%
4521

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
27%6%8%20%20%19%
1709
11th to 20thDay
27%47%15%23%25%
1755
21st to endDay
29%47%17%16%27%
1980
February1st to 10thDay
26%46%14%24%26%
1800
11th to 20thDay
23%5%7%17%28%20%
1760
21st to endDay
28%410%18%25%17%
1480
March1st to 10thDay
29%6%8%19%18%20%
1800
11th to 20thDay
23%6%12%21%24%14%
1856
21st to endDay
22%6%14%24%21%14%
2344
April1st to 10thDay
26%5%12%27%20%10%
2160
11th to 20thDay
22%5%9%21%25%18%
2132
21st to endDay
18%6%11%27%26%12%
2160
May1st to 10thDay
25%6%12%21%22%13%
2243
11th to 20thDay
23%6%8%26%25%11%
2304
21st to endDay
26%6%10%28%24%6%
2530
June1st to 10thDay
25%7%9%20%26%12%
2340
11th to 20thDay
18%5%6%17%30%24%
2340
21st to endDay
17%45%12%26%37%
2503
July1st to 10thDay
16%6%5%12%26%35%
2417
11th to 20thDay
15%6%10%19%27%22%
2271
21st to endDay
16%6%11%25%27%14%
2271
August1st to 10thDay
12%45%17%31%31%
2135
11th to 20thDay
10%45%19%33%29%
2122
21st to endDay
13%45%16%33%29%
2376
September1st to 10thDay
12%45%11%35%32%
2160
11th to 20thDay
12%45%14%34%31%
1994
21st to endDay
15%3416%33%29%
1980
October1st to 10thDay
19%48%18%23%29%
1980
11th to 20thDay
18%46%17%25%30%
1930
21st to endDay
17%45%13%22%38%
1913
November1st to 10thDay
17%5%7%19%21%32%
1674
11th to 20thDay
18%49%15%19%35%
1710
21st to endDay
22%410%14%22%28%
1710
December1st to 10thDay
25%5%10%19%18%23%
1710
11th to 20thDay
37%6%9%14%19%14%
2168
21st to endDay
37%8%12%19%14%10%
3146
January1st to 10thNight
27%5%8%15%24%21%
2457
11th to 20thNight
26%47%15%19%29%
2244
21st to endNight
28%48%14%14%31%
2376
February1st to 10thNight
25%47%14%23%28%
2160
11th to 20thNight
29%5%6%14%20%25%
2099
21st to endNight
33%5%5%14%21%22%
1776
March1st to 10thNight
32%6%8%19%15%19%
2160
11th to 20thNight
31%6%9%18%21%15%
2102
21st to endNight
29%5%11%22%21%13%
2008
April1st to 10thNight
33%6%11%21%17%12%
1800
11th to 20thNight
25%8%9%19%22%18%
1779
21st to endNight
28%8%11%21%21%12%
1800
May1st to 10thNight
34%7%11%19%17%13%
1715
11th to 20thNight
36%8%10%18%17%11%
1595
21st to endNight
33%8%9%22%20%8%
1746
June1st to 10thNight
41%10%9%10%19%10%
1620
11th to 20thNight
27%9%7%13%25%19%
1620
21st to endNight
25%10%8%10%20%26%
1444
July1st to 10thNight
24%9%7%15%20%26%
1421
11th to 20thNight
21%7%11%17%23%20%
1566
21st to endNight
23%8%10%23%25%11%
1802
August1st to 10thNight
20%7%6%15%28%24%
1780
11th to 20thNight
18%6%6%16%28%25%
1780
21st to endNight
17%7%7%14%28%28%
1980
September1st to 10thNight
22%5%5%10%28%29%
1800
11th to 20thNight
17%45%10%29%35%
1966
21st to endNight
18%4413%33%28%
1980
October1st to 10thNight
18%6%8%19%22%28%
1980
11th to 20thNight
22%46%14%24%30%
2026
21st to endNight
19%5%5%11%23%38%
2439
November1st to 10thNight
19%5%6%16%19%35%
2405
11th to 20thNight
20%36%15%18%38%
2470
21st to endNight
27%5%8%16%16%29%
2470
December1st to 10thNight
27%6%8%16%18%26%
2470
11th to 20thNight
36%6%9%13%20%16%
3041
21st to endNight
35%9%12%18%13%12%
4521

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
16%6%17%36%21%4
270
11th to 20thDay
13%6%19%39%21%3
363
21st to endDay
12%7%27%34%16%3
462
February1st to 10thDay
12%7%23%31%20%6%
420
11th to 20thDay
10%10%27%36%16%1
415
21st to endDay
12%12%30%32%13%1
346
March1st to 10thDay
14%9%33%28%12%3
420
11th to 20thDay
13%8%29%31%17%4
420
21st to endDay
7%13%32%33%12%2
462
April1st to 10thDay
9%7%32%28%20%4
420
11th to 20thDay
6%12%32%34%13%4
412
21st to endDay
410%30%32%17%7%
420
May1st to 10thDay
9%7%29%33%16%6%
423
11th to 20thDay
7%7%23%39%19%5%
448
21st to endDay
8%9%27%35%16%5%
485
June1st to 10thDay
3421%35%30%7%
450
11th to 20thDay
4320%38%26%10%
450
21st to endDay
2115%38%32%11%
450
July1st to 10thDay
28%39%38%13%
446
11th to 20thDay
2435%39%20%
444
21st to endDay
15%40%36%18%
487
August1st to 10thDay
110%39%35%14%
447
11th to 20thDay
126%41%33%17%
437
21st to endDay
16%39%38%16%
495
September1st to 10thDay
2210%48%24%13%
450
11th to 20thDay
3116%44%27%9%
450
21st to endDay
3318%37%29%10%
450
October1st to 10thDay
4421%38%26%7%
450
11th to 20thDay
4421%38%24%8%
450
21st to endDay
4419%33%29%10%
428
November1st to 10thDay
5%5%16%34%31%9%
270
11th to 20thDay
45%12%40%28%10%
270
21st to endDay
7%6%20%33%25%9%
270
December1st to 10thDay
12%415%33%31%5%
270
11th to 20thDay
9%219%35%27%8%
270
21st to endDay
17%9%21%31%18%4
297
January1st to 10thNight
11%214%37%26%10%
760
11th to 20thNight
9%210%40%30%9%
728
21st to endNight
12%314%39%28%5%
792
February1st to 10thNight
9%210%38%31%10%
720
11th to 20thNight
11%313%39%26%8%
704
21st to endNight
15%313%40%24%6%
592
March1st to 10thNight
10%412%43%25%5%
720
11th to 20thNight
11%311%36%30%9%
720
21st to endNight
8%313%38%33%5%
792
April1st to 10thNight
11%29%41%32%6%
720
11th to 20thNight
6%414%38%31%7%
711
21st to endNight
7%49%35%36%9%
720
May1st to 10thNight
8%311%33%38%7%
635
11th to 20thNight
6%312%28%42%9%
531
21st to endNight
7%313%33%38%7%
584
June1st to 10thNight
5%215%32%39%7%
540
11th to 20thNight
2110%31%49%7%
540
21st to endNight
41418%59%13%
364
July1st to 10thNight
218%9%62%19%
371
11th to 20thNight
15%11%63%21%
522
21st to endNight
215%8%58%26%
726
August1st to 10thNight
215%14%57%21%
716
11th to 20thNight
139%60%27%
712
21st to endNight
2311%58%26%
792
September1st to 10thNight
32415%54%21%
720
11th to 20thNight
325%18%56%16%
720
21st to endNight
31427%48%17%
720
October1st to 10thNight
415%38%43%9%
720
11th to 20thNight
6%26%32%40%14%
720
21st to endNight
439%31%37%16%
792
November1st to 10thNight
428%34%38%14%
740
11th to 20thNight
5%15%39%36%13%
760
21st to endNight
7%311%38%31%10%
760
December1st to 10thNight
10%39%40%30%8%
760
11th to 20thNight
14%212%38%27%7%
760
21st to endNight
13%5%15%34%25%8%
836
Page generated at 2024-01-09 22:25:00. Version ac07

Copyright 2024 Attilla Danko


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