Weinberg-King State Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Weinberg-King State Park clear sky chart from 2005-11-06 to 2024-01-12.

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
38%
24522
19%
74670
12%
24464
45%
24464
25%
48465

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
22%
950
17%
2648
6%
946
32%
946
21%
1837
January11th to 20thNight
20%
908
15%
2464
6%
908
27%
908
19%
1804
January21st to endNight
22%
990
14%
2574
4%
990
29%
990
18%
1899
February1st to 10thNight
20%
900
13%
2340
3%
900
26%
900
19%
1736
February11th to 20thNight
23%
780
18%
2177
6%
778
32%
778
23%
1474
February21st to endNight
20%
592
21%
1776
6%
592
33%
592
21%
1202
March1st to 10thNight
23%
694
19%
2134
7%
694
34%
694
21%
1405
March11th to 20thNight
30%
540
18%
1980
13%
540
39%
540
18%
1282
March21st to endNight
22%
594
11%
2080
7%
594
30%
594
13%
1525
April1st to 10thNight
27%
540
18%
1800
9%
540
39%
540
23%
1124
April11th to 20thNight
33%
533
20%
1775
15%
533
43%
533
23%
1122
April21st to endNight
29%
540
18%
1800
9%
540
41%
540
21%
1185
May1st to 10thNight
32%
540
15%
1649
8%
540
40%
540
23%
1105
May11th to 20thNight
42%
531
20%
1417
11%
531
49%
531
28%
953
May21st to endNight
48%
584
18%
1551
10%
582
53%
582
28%
1038
June1st to 10thNight
60%
540
19%
1440
13%
540
63%
540
42%
852
June11th to 20thNight
55%
540
22%
1440
13%
540
59%
540
37%
879
June21st to endNight
52%
540
19%
1440
10%
540
57%
540
34%
910
July1st to 10thNight
70%
525
17%
1400
13%
525
71%
525
39%
840
July11th to 20thNight
69%
522
25%
1392
18%
522
73%
522
44%
794
July21st to endNight
70%
591
25%
1566
21%
558
73%
558
42%
883
August1st to 10thNight
73%
537
22%
1601
23%
534
75%
534
39%
898
August11th to 20thNight
68%
534
25%
1715
28%
534
71%
534
36%
956
August21st to endNight
72%
594
24%
1980
26%
594
76%
594
39%
1035
September1st to 10thNight
62%
540
26%
1800
26%
540
67%
540
36%
964
September11th to 20thNight
64%
540
33%
1800
33%
540
68%
540
37%
968
September21st to endNight
55%
702
26%
2006
17%
702
63%
702
38%
1144
October1st to 10thNight
50%
720
24%
2160
18%
720
55%
720
35%
1246
October11th to 20thNight
35%
720
26%
2160
14%
720
46%
720
30%
1282
October21st to endNight
28%
792
20%
2405
10%
792
38%
792
24%
1579
November1st to 10thNight
35%
740
26%
2406
16%
740
48%
740
32%
1346
November11th to 20thNight
27%
760
23%
2470
11%
760
41%
760
24%
1508
November21st to endNight
27%
931
20%
2641
9%
931
37%
931
24%
1765
December1st to 10thNight
24%
950
15%
2660
6%
950
32%
950
21%
1856
December11th to 20thNight
28%
949
17%
3153
7%
948
35%
948
19%
2083
December21st to endNight
18%
1039
9%
4870
4%
1026
28%
1026
8%
3986

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
13%7%36%5%35%5%5%7%40%
74741
Night
13%8%36%5%3445%7%43%
74998
TransparencyDay
43%7%12%23%13%2
74446
Night
42%5%12%23%15%2
74813
SeeingDay
15%10%27%27%16%5%
14567
Night
16%10%31%30%12%1
24530

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 10thDay
12%11%5%10%7%4445%7%31%
1517
11th to 20thDay
15%13%6%11%6%34345%28%
1524
21st to endDay
14%13%6%10%8%34445%30%
1782
February1st to 10thDay
16%9%6%9%6%45%5%46%30%
1620
11th to 20thDay
14%9%37%7%45%5%6%7%34%
1670
21st to endDay
16%11%48%6%33447%34%
1480
March1st to 10thDay
15%11%5%6%6%35%45%5%36%
1842
11th to 20thDay
14%10%46%5%345%47%37%
1980
21st to endDay
20%10%5%8%6%3445%6%29%
2276
April1st to 10thDay
14%8%46%5%35%46%6%39%
2160
11th to 20thDay
16%9%27%6%35%35%6%39%
2134
21st to endDay
20%6%36%6%345%5%7%34%
2160
May1st to 10thDay
17%8%36%6%35%5%6%8%33%
2308
11th to 20thDay
17%7%37%6%3435%7%38%
2479
21st to endDay
14%7%36%7%46%6%6%8%35%
2725
June1st to 10thDay
7%426%6%35%5%6%10%46%
2520
11th to 20thDay
7%436%6%36%5%6%6%48%
2520
21st to endDay
10%436%5%36%6%7%8%43%
2520
July1st to 10thDay
8%325%5%35%6%6%10%46%
2520
11th to 20thDay
7%4245%46%6%7%9%47%
2520
21st to endDay
8%4245%446%6%10%46%
2656
August1st to 10thDay
8%5%25%6%35%6%6%9%43%
2328
11th to 20thDay
9%5%25%5%45%5%5%9%46%
2184
21st to endDay
8%425%4346%6%7%51%
2376
September1st to 10thDay
13%425%4345%6%7%48%
2160
11th to 20thDay
10%42442445%9%53%
2160
21st to endDay
7%4245%45%6%5%9%51%
1933
October1st to 10thDay
13%5%26%5%3445%6%50%
1800
11th to 20thDay
15%8%36%5%24346%45%
1800
21st to endDay
19%8%36%434445%41%
1949
November1st to 10thDay
10%7%25%5%2445%6%51%
1672
11th to 20thDay
15%8%5%6%32435%7%43%
1710
21st to endDay
17%10%48%5%24336%37%
1535
December1st to 10thDay
14%12%47%5%3435%6%36%
1520
11th to 20thDay
15%10%47%43446%6%37%
1918
21st to endDay
22%17%7%10%5%24345%20%
2783
January1st to 10thNight
12%9%5%7%5%45%5%46%38%
2648
11th to 20thNight
14%12%5%8%7%35%35%5%33%
2464
21st to endNight
14%11%5%9%6%35%5%5%7%32%
2574
February1st to 10thNight
16%11%5%7%5%35%445%33%
2340
11th to 20thNight
15%8%5%6%6%2445%7%38%
2176
21st to endNight
16%10%46%5%3344441%
1776
March1st to 10thNight
13%10%46%5%35%346%42%
2134
11th to 20thNight
16%10%47%434447%38%
1980
21st to endNight
21%10%47%5%3445%6%29%
2080
April1st to 10thNight
13%7%36%5%345%5%7%42%
1800
11th to 20thNight
14%7%25%5%345%5%7%43%
1775
21st to endNight
18%7%36%5%24446%40%
1800
May1st to 10thNight
16%7%25%6%3446%8%39%
1649
11th to 20thNight
16%5%25%5%3445%7%43%
1416
21st to endNight
12%6%35%5%36%47%8%42%
1551
June1st to 10thNight
7%5%3443445%9%53%
1440
11th to 20thNight
8%425%5%3446%8%50%
1440
21st to endNight
6%435%5%45%6%6%7%48%
1440
July1st to 10thNight
8%324435%46%10%51%
1440
11th to 20thNight
43245%35%5%6%9%55%
1440
21st to endNight
7%42443445%9%55%
1658
August1st to 10thNight
6%4134346%6%11%51%
1611
11th to 20thNight
7%5%25%5%3445%7%54%
1715
21st to endNight
7%32342445%8%58%
1980
September1st to 10thNight
11%5%25%323346%56%
1800
11th to 20thNight
8%4244235%5%8%54%
1800
21st to endNight
8%4245%35%5%5%8%53%
2006
October1st to 10thNight
10%424424447%54%
2160
11th to 20thNight
15%424423446%52%
2160
21st to endNight
17%8%25%434445%44%
2405
November1st to 10thNight
11%5%24424446%55%
2406
11th to 20thNight
14%7%26%5%3445%6%46%
2470
21st to endNight
17%8%36%424347%41%
2641
December1st to 10thNight
14%11%47%5%345%5%6%36%
2660
11th to 20thNight
15%8%37%5%34345%40%
3279
21st to endNight
22%17%7%10%6%4343420%
4884

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
53%5%11%17%13%1
1518
11th to 20thDay
59%5%12%17%7%
1524
21st to endDay
57%5%12%17%8%1
1782
February1st to 10thDay
55%6%13%17%7%2
1620
11th to 20thDay
49%7%12%20%11%1
1679
21st to endDay
51%5%12%20%11%2
1480
March1st to 10thDay
50%6%11%23%9%1
1842
11th to 20thDay
48%6%14%21%10%1
1980
21st to endDay
56%7%10%19%7%1
2276
April1st to 10thDay
44%6%12%25%12%
2160
11th to 20thDay
46%5%10%24%13%2
2134
21st to endDay
48%7%11%19%13%2
2160
May1st to 10thDay
48%8%13%20%10%1
2308
11th to 20thDay
47%6%12%22%12%1
2483
21st to endDay
45%9%12%18%15%1
2725
June1st to 10thDay
33%8%15%28%15%2
2520
11th to 20thDay
36%7%11%22%21%3
2520
21st to endDay
36%9%15%21%16%3
2520
July1st to 10thDay
31%10%14%27%14%4
2451
11th to 20thDay
32%9%16%26%15%3
2445
21st to endDay
32%8%15%30%15%1
2508
August1st to 10thDay
35%9%17%28%10%2
2314
11th to 20thDay
34%9%14%28%14%2
2184
21st to endDay
30%8%11%26%20%5%
2376
September1st to 10thDay
34%7%11%26%17%5%
2160
11th to 20thDay
29%5%11%29%21%4
2160
21st to endDay
30%7%11%29%21%2
1933
October1st to 10thDay
35%6%10%25%22%3
1800
11th to 20thDay
42%48%25%19%3
1800
21st to endDay
45%5%10%24%13%3
1949
November1st to 10thDay
35%5%15%24%19%3
1672
11th to 20thDay
43%311%25%15%2
1710
21st to endDay
50%5%13%22%10%
1535
December1st to 10thDay
49%5%14%22%10%
1520
11th to 20thDay
46%6%10%26%10%2
1915
21st to endDay
67%5%10%13%5%
2783
January1st to 10thNight
47%5%11%22%14%1
2648
11th to 20thNight
54%413%21%8%
2464
21st to endNight
52%5%14%18%9%1
2574
February1st to 10thNight
54%412%18%10%2
2340
11th to 20thNight
46%312%25%12%1
2177
21st to endNight
47%410%24%13%3
1776
March1st to 10thNight
45%5%10%25%14%1
2134
11th to 20thNight
47%5%11%21%13%3
1980
21st to endNight
57%6%11%19%7%1
2080
April1st to 10thNight
41%6%12%24%14%3
1800
11th to 20thNight
41%6%10%25%15%4
1775
21st to endNight
45%6%11%20%15%3
1800
May1st to 10thNight
43%7%13%22%13%1
1649
11th to 20thNight
41%7%12%22%18%1
1417
21st to endNight
39%8%13%19%18%4
1552
June1st to 10thNight
28%6%17%28%19%3
1440
11th to 20thNight
32%6%11%24%22%5%
1440
21st to endNight
31%10%16%20%20%3
1440
July1st to 10thNight
30%7%15%31%13%4
1400
11th to 20thNight
25%7%14%32%19%3
1392
21st to endNight
26%6%14%29%22%2
1566
August1st to 10thNight
25%9%17%33%14%2
1601
11th to 20thNight
30%6%11%31%20%2
1715
21st to endNight
24%8%13%25%23%7%
1980
September1st to 10thNight
29%412%25%22%7%
1800
11th to 20thNight
28%6%12%25%24%5%
1800
21st to endNight
29%5%12%25%26%3
2006
October1st to 10thNight
31%6%11%24%24%5%
2160
11th to 20thNight
35%5%10%26%21%4
2160
21st to endNight
43%5%10%20%20%2
2405
November1st to 10thNight
31%5%13%26%20%5%
2406
11th to 20thNight
40%412%23%19%2
2470
21st to endNight
45%311%25%14%1
2641
December1st to 10thNight
48%5%13%22%11%1
2660
11th to 20thNight
46%414%25%11%1
3281
21st to endNight
68%5%8%12%6%1
4884

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
20%17%34%19%9%
270
11th to 20thDay
26%20%36%15%2
243
21st to endDay
16%23%39%15%6%
264
February1st to 10thDay
28%17%35%16%4
240
11th to 20thDay
23%20%32%18%5%1
240
21st to endDay
24%17%39%18%2
198
March1st to 10thDay
20%23%40%15%2
240
11th to 20thDay
24%16%37%16%7%
240
21st to endDay
33%16%31%15%41
362
April1st to 10thDay
19%15%35%23%7%1
420
11th to 20thDay
19%15%34%20%11%1
412
21st to endDay
21%13%36%22%7%1
420
May1st to 10thDay
21%11%34%26%6%2
495
11th to 20thDay
19%12%29%25%13%2
625
21st to endDay
15%7%31%25%16%7%
679
June1st to 10thDay
8%422%35%24%7%
630
11th to 20thDay
8%426%35%21%5%
630
21st to endDay
9%9%28%34%17%4
630
July1st to 10thDay
9%415%30%27%15%
621
11th to 20thDay
7%323%36%26%6%
618
21st to endDay
10%217%35%31%5%
684
August1st to 10thDay
7%315%41%25%9%
626
11th to 20thDay
9%318%28%31%11%
498
21st to endDay
7%216%30%33%12%
495
September1st to 10thDay
14%416%31%27%8%
450
11th to 20thDay
8%216%37%27%10%
450
21st to endDay
7%10%23%30%21%9%
403
October1st to 10thDay
14%10%27%31%13%5%
270
11th to 20thDay
16%20%36%20%7%1
270
21st to endDay
30%12%34%20%4
297
November1st to 10thDay
10%12%41%23%11%3
270
11th to 20thDay
19%19%27%26%6%2
270
21st to endDay
25%14%32%21%7%
270
December1st to 10thDay
13%17%39%22%7%3
270
11th to 20thDay
20%16%37%22%5%
270
21st to endDay
24%22%38%14%2
297
January1st to 10thNight
17%15%41%21%6%
950
11th to 20thNight
19%15%39%21%5%
908
21st to endNight
18%15%38%26%3
990
February1st to 10thNight
21%13%40%23%4
900
11th to 20thNight
20%14%38%25%3
781
21st to endNight
22%17%38%21%2
592
March1st to 10thNight
18%15%41%21%5%
694
11th to 20thNight
21%11%33%29%5%
540
21st to endNight
25%11%35%22%5%1
594
April1st to 10thNight
17%15%38%25%4
540
11th to 20thNight
18%10%34%30%7%1
533
21st to endNight
21%10%35%27%7%
540
May1st to 10thNight
18%6%38%30%8%1
540
11th to 20thNight
16%8%29%34%12%1
531
21st to endNight
13%6%25%35%19%2
584
June1st to 10thNight
8%423%44%20%1
540
11th to 20thNight
10%424%43%18%1
540
21st to endNight
6%5%29%38%20%1
540
July1st to 10thNight
9%212%39%34%4
525
11th to 20thNight
5%217%46%29%2
522
21st to endNight
7%212%45%32%1
591
August1st to 10thNight
6%212%47%30%3
537
11th to 20thNight
7%214%40%32%5%
534
21st to endNight
7%113%40%38%2
594
September1st to 10thNight
12%317%38%25%4
540
11th to 20thNight
9%218%36%30%5%
540
21st to endNight
9%7%23%34%24%5%
702
October1st to 10thNight
11%6%28%32%20%3
720
11th to 20thNight
17%11%33%27%11%1
720
21st to endNight
20%14%34%25%7%
792
November1st to 10thNight
14%11%38%29%9%1
740
11th to 20thNight
16%15%38%25%6%
760
21st to endNight
21%13%36%24%5%
931
December1st to 10thNight
19%13%39%24%5%1
950
11th to 20thNight
22%11%33%28%6%
950
21st to endNight
26%17%33%22%2
1045
Page generated at 2024-01-09 06:14:39. Version ac07

Copyright 2024 Attilla Danko


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