Hobuck Beach
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Hobuck Beach clear sky chart from 2005-11-06 to 2024-01-11.

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
35%
22718
8%
74821
8%
22661
37%
22661
11%
59575

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
19%
850
7%
2836
5%
846
22%
846
6%
2479
January11th to 20thNight
29%
804
6%
2712
6%
804
29%
804
7%
2276
January21st to endNight
26%
826
8%
2718
7%
826
28%
826
8%
2254
February1st to 10thNight
24%
720
8%
2340
4%
720
29%
720
8%
1960
February11th to 20thNight
31%
700
10%
2274
8%
700
34%
700
11%
1799
February21st to endNight
26%
592
10%
1924
8%
592
30%
592
10%
1531
March1st to 10thNight
31%
720
10%
2048
9%
720
32%
720
11%
1668
March11th to 20thNight
27%
720
7%
1980
5%
720
28%
720
9%
1671
March21st to endNight
28%
792
7%
2178
4%
792
29%
792
9%
1870
April1st to 10thNight
33%
720
5%
1809
3%
720
33%
720
12%
1524
April11th to 20thNight
37%
554
9%
1622
7%
554
37%
554
11%
1318
April21st to endNight
37%
540
8%
1620
7%
540
39%
540
12%
1288
May1st to 10thNight
47%
404
10%
1484
14%
404
47%
404
15%
1068
May11th to 20thNight
42%
354
7%
1416
12%
354
42%
354
9%
1101
May21st to endNight
42%
389
6%
1448
9%
388
43%
388
10%
1116
June1st to 10thNight
41%
360
4%
1260
4%
360
41%
360
11%
983
June11th to 20thNight
42%
360
3%
1260
3%
360
42%
360
10%
1023
June21st to endNight
50%
360
6%
1260
5%
360
50%
360
13%
940
July1st to 10thNight
52%
350
4%
1225
6%
350
52%
350
16%
888
July11th to 20thNight
56%
348
9%
1218
12%
348
56%
348
18%
847
July21st to endNight
53%
394
10%
1389
17%
372
54%
372
17%
944
August1st to 10thNight
39%
498
8%
1564
9%
496
39%
496
13%
1187
August11th to 20thNight
58%
534
17%
1602
16%
534
58%
534
23%
1069
August21st to endNight
47%
602
12%
1790
10%
602
47%
602
17%
1291
September1st to 10thNight
57%
720
15%
1800
10%
720
57%
720
26%
1297
September11th to 20thNight
48%
720
12%
1888
9%
720
48%
720
19%
1420
September21st to endNight
49%
720
14%
2006
13%
720
50%
720
21%
1461
October1st to 10thNight
47%
720
9%
2160
9%
720
48%
720
18%
1562
October11th to 20thNight
43%
720
10%
2160
11%
720
44%
720
15%
1657
October21st to endNight
36%
792
12%
2484
12%
792
39%
792
14%
1904
November1st to 10thNight
28%
740
6%
2590
6%
740
30%
740
8%
2122
November11th to 20thNight
27%
760
6%
2660
6%
760
29%
760
8%
2189
November21st to endNight
30%
760
7%
2660
5%
760
32%
760
9%
2137
December1st to 10thNight
30%
793
8%
2728
7%
793
33%
793
9%
2192
December11th to 20thNight
21%
850
4%
3502
3%
849
23%
849
5%
3010
December21st to endNight
17%
932
4%
5206
4%
905
21%
905
3%
4529

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
27%12%47%6%34446%22%
74695
Night
30%12%47%5%34345%23%
75011
TransparencyDay
61%9%12%12%5%1
74381
Night
63%7%10%12%6%1
74843
SeeingDay
28%311%21%24%13%
14467
Night
36%413%20%18%8%
22725

By Month

Percentage Cloud Cover NW (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
49%11%3432232316%
1329
11th to 20thDay
37%13%5%6%5%24447%14%
1260
21st to endDay
37%12%38%5%3343415%
1636
February1st to 10thDay
39%12%45%5%345%46%14%
1620
11th to 20thDay
34%11%38%5%2332423%
1575
21st to endDay
27%13%5%7%6%35%445%21%
1332
March1st to 10thDay
30%11%5%9%6%3434420%
1908
11th to 20thDay
34%12%5%8%5%33345%18%
1980
21st to endDay
33%13%5%7%6%3443418%
2178
April1st to 10thDay
32%12%47%6%445%5%5%17%
2150
11th to 20thDay
26%11%5%8%6%445%5%6%22%
2285
21st to endDay
27%11%5%7%6%45%446%21%
2340
May1st to 10thDay
23%11%46%6%45%5%5%5%25%
2475
11th to 20thDay
22%12%5%9%7%45%5%5%6%20%
2477
21st to endDay
22%12%5%9%7%46%5%5%7%18%
2824
June1st to 10thDay
28%11%47%6%4445%6%20%
2700
11th to 20thDay
23%14%5%9%7%44447%18%
2700
21st to endDay
20%13%5%9%6%35%5%46%24%
2700
July1st to 10thDay
19%13%48%7%35%5%5%7%24%
2700
11th to 20thDay
18%13%46%6%35%5%5%7%28%
2700
21st to endDay
14%15%5%8%7%46%5%5%7%25%
2844
August1st to 10thDay
16%17%5%10%8%5%5%347%20%
2364
11th to 20thDay
13%10%47%7%45%5%7%8%31%
2298
21st to endDay
18%13%48%6%345%6%7%25%
2566
September1st to 10thDay
17%13%46%6%345%5%5%32%
2160
11th to 20thDay
20%11%49%6%3435%5%30%
2070
21st to endDay
23%7%46%6%35%45%6%31%
1954
October1st to 10thDay
23%9%47%6%35%45%6%29%
1800
11th to 20thDay
30%9%36%5%35%45%7%22%
1800
21st to endDay
31%8%36%5%335%5%5%26%
1866
November1st to 10thDay
39%8%36%6%44445%18%
1488
11th to 20thDay
38%9%47%5%24335%20%
1520
21st to endDay
37%11%47%434445%18%
1520
December1st to 10thDay
33%10%45%43333426%
1449
11th to 20thDay
41%12%37%6%4333415%
1685
21st to endDay
38%14%5%9%6%3443411%
2442
January1st to 10thNight
44%11%47%6%2333314%
2836
11th to 20thNight
42%10%36%6%3334417%
2712
21st to endNight
38%12%47%5%2344417%
2718
February1st to 10thNight
38%11%46%424445%18%
2340
11th to 20thNight
33%11%37%5%3433425%
2272
21st to endNight
31%13%47%5%2334423%
1924
March1st to 10thNight
30%12%47%6%34445%21%
2048
11th to 20thNight
35%13%5%7%6%23345%17%
1979
21st to endNight
34%14%5%8%5%3334417%
2178
April1st to 10thNight
31%12%47%6%34445%19%
1809
11th to 20thNight
28%11%5%8%5%35%446%21%
1622
21st to endNight
27%12%38%6%44447%23%
1620
May1st to 10thNight
22%10%5%7%5%24346%33%
1484
11th to 20thNight
23%14%48%6%4446%7%20%
1416
21st to endNight
25%13%5%6%6%23347%25%
1448
June1st to 10thNight
25%14%5%7%5%24346%24%
1260
11th to 20thNight
28%15%46%435%346%22%
1260
21st to endNight
19%13%38%5%346%5%6%28%
1260
July1st to 10thNight
21%14%2442346%8%32%
1260
11th to 20thNight
16%15%35%423447%36%
1260
21st to endNight
13%17%47%423447%34%
1471
August1st to 10thNight
18%20%48%5%23437%26%
1572
11th to 20thNight
11%11%36%6%3446%9%38%
1602
21st to endNight
19%14%46%43445%8%30%
1790
September1st to 10thNight
15%12%35%5%3445%7%38%
1800
11th to 20thNight
21%12%37%5%23345%33%
1888
21st to endNight
24%9%35%323346%36%
2006
October1st to 10thNight
22%9%47%6%3445%5%33%
2160
11th to 20thNight
29%10%35%5%2435%5%28%
2160
21st to endNight
32%8%35%5%3344430%
2484
November1st to 10thNight
37%10%38%5%33335%19%
2590
11th to 20thNight
37%11%36%5%2443420%
2660
21st to endNight
36%8%46%6%34345%21%
2660
December1st to 10thNight
32%12%46%5%3444423%
2728
11th to 20thNight
40%14%5%6%5%2333415%
3520
21st to endNight
40%13%5%7%6%3433412%
5214

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
76%47%8%5%
1329
11th to 20thDay
74%5%9%6%42
1260
21st to endDay
74%5%7%11%3
1636
February1st to 10thDay
72%7%8%8%5%
1620
11th to 20thDay
68%48%13%7%1
1584
21st to endDay
66%7%11%9%5%2
1332
March1st to 10thDay
68%6%10%14%2
1908
11th to 20thDay
71%5%9%9%31
1980
21st to endDay
73%5%10%10%1
2178
April1st to 10thDay
71%7%11%9%2
2150
11th to 20thDay
66%7%9%11%7%
2285
21st to endDay
66%7%11%12%41
2340
May1st to 10thDay
59%9%13%13%5%1
2475
11th to 20thDay
60%9%12%13%4
2480
21st to endDay
64%11%14%11%1
2825
June1st to 10thDay
64%9%14%9%31
2700
11th to 20thDay
67%9%11%9%3
2700
21st to endDay
57%11%15%10%6%1
2700
July1st to 10thDay
54%11%13%13%8%1
2626
11th to 20thDay
48%13%18%15%6%1
2619
21st to endDay
44%15%17%18%5%2
2686
August1st to 10thDay
50%15%15%13%5%2
2347
11th to 20thDay
41%14%17%16%10%3
2298
21st to endDay
51%13%14%18%41
2566
September1st to 10thDay
49%10%13%18%7%3
2160
11th to 20thDay
54%10%9%14%12%1
2070
21st to endDay
50%12%15%14%8%1
1954
October1st to 10thDay
53%9%15%13%9%
1800
11th to 20thDay
61%7%16%10%5%
1800
21st to endDay
60%8%12%11%9%
1866
November1st to 10thDay
71%5%11%9%31
1488
11th to 20thDay
69%49%10%6%1
1520
21st to endDay
69%7%8%11%6%
1520
December1st to 10thDay
64%5%10%13%7%1
1449
11th to 20thDay
73%6%9%9%31
1688
21st to endDay
76%7%8%6%21
2442
January1st to 10thNight
76%5%6%6%5%1
2836
11th to 20thNight
71%6%9%8%42
2712
21st to endNight
71%5%7%12%5%1
2718
February1st to 10thNight
70%6%8%10%5%1
2340
11th to 20thNight
64%5%9%13%8%1
2274
21st to endNight
65%5%9%14%5%1
1924
March1st to 10thNight
66%6%9%14%5%
2048
11th to 20thNight
69%6%10%10%32
1980
21st to endNight
73%5%9%11%2
2178
April1st to 10thNight
67%6%13%10%4
1809
11th to 20thNight
65%7%10%12%42
1622
21st to endNight
63%6%10%13%7%1
1620
May1st to 10thNight
52%9%14%17%7%1
1484
11th to 20thNight
60%10%11%13%6%1
1416
21st to endNight
60%9%15%13%3
1448
June1st to 10thNight
63%6%13%11%5%1
1260
11th to 20thNight
64%9%12%12%4
1260
21st to endNight
54%11%15%12%6%2
1260
July1st to 10thNight
51%9%14%13%10%2
1225
11th to 20thNight
47%9%17%17%9%1
1218
21st to endNight
44%12%14%19%9%2
1389
August1st to 10thNight
55%11%12%12%9%2
1564
11th to 20thNight
38%13%14%21%10%4
1602
21st to endNight
50%10%14%19%7%
1790
September1st to 10thNight
43%10%12%22%9%4
1800
11th to 20thNight
52%8%12%11%13%3
1888
21st to endNight
49%8%12%18%10%3
2006
October1st to 10thNight
50%8%12%18%10%1
2160
11th to 20thNight
59%6%12%15%8%
2160
21st to endNight
59%6%10%15%9%1
2484
November1st to 10thNight
69%6%9%12%4
2590
11th to 20thNight
69%6%10%7%6%2
2660
21st to endNight
67%5%10%10%7%1
2660
December1st to 10thNight
65%7%9%11%6%1
2728
11th to 20thNight
75%5%8%8%31
3516
21st to endNight
77%7%8%6%3
5214

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
51%7%19%14%8%1
180
11th to 20thDay
43%7%20%17%14%
160
21st to endDay
41%412%27%13%4
305
February1st to 10thDay
44%6%14%24%11%
340
11th to 20thDay
39%314%27%14%2
335
21st to endDay
31%11%15%25%15%4
280
March1st to 10thDay
30%5%17%25%17%5%
404
11th to 20thDay
34%5%15%25%15%6%
420
21st to endDay
38%6%13%21%17%5%
462
April1st to 10thDay
34%5%17%24%14%7%
420
11th to 20thDay
27%313%27%19%11%
412
21st to endDay
29%413%26%21%7%
420
May1st to 10thDay
22%212%26%28%10%
423
11th to 20thDay
27%18%22%26%15%
448
21st to endDay
22%310%21%28%16%
586
June1st to 10thDay
29%29%20%28%13%
630
11th to 20thDay
24%310%25%27%11%
630
21st to endDay
22%18%19%32%18%
630
July1st to 10thDay
22%19%13%33%22%
621
11th to 20thDay
18%17%18%35%20%
618
21st to endDay
15%7%15%33%31%
590
August1st to 10thDay
24%17%15%23%30%
447
11th to 20thDay
16%1414%35%29%
437
21st to endDay
22%19%18%31%19%
495
September1st to 10thDay
25%18%19%33%14%
450
11th to 20thDay
27%111%17%26%18%
450
21st to endDay
26%210%22%29%12%
450
October1st to 10thDay
27%313%19%24%14%
450
11th to 20thDay
35%212%20%23%8%
450
21st to endDay
33%418%25%15%5%
426
November1st to 10thDay
38%6%10%28%17%1
180
11th to 20thDay
39%314%26%16%3
180
21st to endDay
45%8%12%17%12%6%
180
December1st to 10thDay
41%7%18%19%11%6%
180
11th to 20thDay
40%7%21%24%7%1
180
21st to endDay
43%7%17%22%10%1
198
January1st to 10thNight
46%10%17%17%9%1
850
11th to 20thNight
46%5%12%23%13%
804
21st to endNight
44%5%15%18%14%2
826
February1st to 10thNight
43%5%19%23%8%1
720
11th to 20thNight
40%417%23%15%1
704
21st to endNight
37%8%19%23%11%3
592
March1st to 10thNight
35%7%17%21%16%4
720
11th to 20thNight
41%6%15%20%14%4
720
21st to endNight
38%6%15%19%18%4
792
April1st to 10thNight
36%5%13%22%18%6%
720
11th to 20thNight
35%414%23%18%6%
554
21st to endNight
32%412%25%20%7%
540
May1st to 10thNight
28%28%26%26%9%
404
11th to 20thNight
30%38%19%28%12%
354
21st to endNight
28%311%20%28%10%
389
June1st to 10thNight
31%311%22%24%9%
360
11th to 20thNight
34%311%21%21%9%
360
21st to endNight
25%29%18%30%17%
360
July1st to 10thNight
26%110%9%32%21%
350
11th to 20thNight
22%27%19%30%20%
348
21st to endNight
21%27%16%28%26%
394
August1st to 10thNight
33%35%11%20%28%
498
11th to 20thNight
20%15%11%31%32%
534
21st to endNight
28%29%16%29%16%
602
September1st to 10thNight
23%26%19%31%20%
720
11th to 20thNight
28%28%18%23%21%
720
21st to endNight
30%211%22%24%11%
720
October1st to 10thNight
26%211%23%25%12%
720
11th to 20thNight
35%311%20%22%10%
720
21st to endNight
37%416%22%17%4
792
November1st to 10thNight
45%415%24%11%1
740
11th to 20thNight
43%6%18%20%11%2
760
21st to endNight
41%418%21%14%2
760
December1st to 10thNight
40%6%17%21%15%2
793
11th to 20thNight
47%6%17%21%8%1
850
21st to endNight
48%9%19%18%6%1
935
Page generated at 2024-01-08 08:14:16. Version ac07

Copyright 2024 Attilla Danko


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