Buescher State Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Buescher 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
48%
23726
25%
74254
17%
23673
56%
23673
32%
42778

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
35%
947
29%
2458
12%
946
45%
946
33%
1534
January11th to 20thNight
35%
910
26%
2366
11%
910
43%
910
31%
1502
January21st to endNight
34%
955
29%
2539
11%
955
44%
955
31%
1607
February1st to 10thNight
29%
720
25%
2160
10%
720
40%
720
24%
1361
February11th to 20thNight
28%
704
22%
2098
10%
700
37%
700
27%
1303
February21st to endNight
20%
554
26%
1738
7%
554
36%
554
22%
1109
March1st to 10thNight
26%
540
24%
1980
10%
540
42%
540
22%
1201
March11th to 20thNight
31%
540
21%
1980
13%
540
41%
540
21%
1206
March21st to endNight
28%
594
25%
2178
14%
594
44%
594
26%
1232
April1st to 10thNight
27%
540
24%
1980
12%
540
43%
540
25%
1141
April11th to 20thNight
28%
533
22%
1927
13%
533
43%
533
25%
1124
April21st to endNight
30%
540
27%
1728
14%
540
48%
540
29%
1024
May1st to 10thNight
32%
540
24%
1620
16%
540
43%
540
28%
1008
May11th to 20thNight
42%
531
23%
1594
20%
531
49%
531
33%
944
May21st to endNight
50%
582
23%
1745
19%
582
60%
582
35%
1023
June1st to 10thNight
71%
540
23%
1620
23%
540
77%
540
48%
821
June11th to 20thNight
62%
540
25%
1620
22%
540
71%
540
47%
821
June21st to endNight
71%
540
22%
1620
24%
540
75%
540
36%
935
July1st to 10thNight
73%
525
17%
1575
20%
525
75%
525
37%
915
July11th to 20thNight
80%
522
26%
1566
27%
522
85%
522
52%
765
July21st to endNight
82%
591
24%
1673
27%
558
85%
558
51%
834
August1st to 10thNight
87%
537
28%
1601
29%
534
91%
534
63%
711
August11th to 20thNight
78%
534
25%
1659
27%
534
80%
534
40%
896
August21st to endNight
80%
594
19%
2137
22%
594
82%
594
34%
1123
September1st to 10thNight
75%
540
21%
1980
25%
540
78%
540
34%
1057
September11th to 20thNight
69%
540
22%
1980
26%
540
70%
540
29%
1124
September21st to endNight
67%
540
26%
1980
27%
540
70%
540
35%
1034
October1st to 10thNight
76%
540
37%
1980
37%
540
79%
540
46%
897
October11th to 20thNight
57%
702
32%
2142
22%
702
64%
702
38%
1194
October21st to endNight
50%
792
33%
2376
20%
792
58%
792
39%
1299
November1st to 10thNight
56%
740
30%
2220
21%
740
61%
740
37%
1270
November11th to 20thNight
48%
793
28%
2313
17%
793
55%
793
35%
1351
November21st to endNight
38%
950
27%
2470
13%
950
46%
950
31%
1580
December1st to 10thNight
40%
950
29%
2470
15%
950
48%
950
31%
1604
December11th to 20thNight
34%
948
26%
2877
12%
948
41%
948
24%
1860
December21st to endNight
36%
1038
17%
4304
11%
1026
44%
1026
22%
2368

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
12%5%25%5%35%5%5%7%45%
74900
Night
13%5%2442445%7%50%
74848
TransparencyDay
39%410%21%18%8%
74625
Night
34%311%22%19%11%
74643
SeeingDay
14%6%19%27%25%9%
13713
Night
15%6%25%36%17%2
23740

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
18%5%244235%36%48%
1707
11th to 20thDay
20%5%24424345%47%
1634
21st to endDay
16%7%35%323345%51%
1832
February1st to 10thDay
22%6%35%423445%43%
1800
11th to 20thDay
21%7%36%333345%43%
1749
21st to endDay
19%7%35%423335%45%
1516
March1st to 10thDay
20%8%26%5%34447%37%
1980
11th to 20thDay
16%7%36%5%34445%42%
1980
21st to endDay
16%6%45%324446%46%
2178
April1st to 10thDay
16%7%36%5%345%5%7%40%
1980
11th to 20thDay
15%7%36%6%34345%42%
1979
21st to endDay
15%5%35%424447%46%
2227
May1st to 10thDay
14%6%36%6%35%6%5%7%40%
2340
11th to 20thDay
11%7%26%6%35%5%6%8%40%
2302
21st to endDay
12%6%37%6%5%6%6%6%9%34%
2531
June1st to 10thDay
5%325%446%6%7%9%49%
2340
11th to 20thDay
6%325%5%36%6%7%10%48%
2340
21st to endDay
6%5%36%6%5%8%8%8%9%36%
2340
July1st to 10thDay
9%6%35%7%5%6%7%7%10%36%
2340
11th to 20thDay
43246%48%7%8%13%43%
2340
21st to endDay
43245%46%6%7%13%47%
2546
August1st to 10thDay
2223435%5%6%10%56%
2328
11th to 20thDay
6%3245%46%7%7%10%47%
2237
21st to endDay
6%426%6%47%7%8%11%40%
2218
September1st to 10thDay
6%6%36%7%47%6%5%8%43%
1980
11th to 20thDay
10%6%26%7%5%6%7%6%6%39%
1980
21st to endDay
6%5%25%5%36%6%6%8%47%
1980
October1st to 10thDay
5%3244346%5%7%55%
1980
11th to 20thDay
15%424424336%52%
1800
21st to endDay
12%5%25%323335%57%
1980
November1st to 10thDay
13%6%25%43346%6%48%
1858
11th to 20thDay
12%5%25%335%35%5%52%
1862
21st to endDay
18%7%35%5%34445%43%
1710
December1st to 10thDay
16%7%36%43345%6%44%
1710
11th to 20thDay
18%6%36%5%34335%44%
2161
21st to endDay
16%7%24433345%50%
3135
January1st to 10thNight
18%6%24223446%50%
2458
11th to 20thNight
19%6%24222335%51%
2366
21st to endNight
17%6%24424335%51%
2539
February1st to 10thNight
20%7%34423345%45%
2160
11th to 20thNight
21%7%24422335%47%
2098
21st to endNight
22%7%34334336%43%
1738
March1st to 10thNight
18%7%2443445%7%42%
1980
11th to 20thNight
17%8%35%5%2335%7%42%
1980
21st to endNight
15%5%34324446%50%
2178
April1st to 10thNight
12%6%35%5%3346%7%45%
1980
11th to 20thNight
17%6%245%23348%45%
1927
21st to endNight
14%6%35%42335%6%48%
1728
May1st to 10thNight
12%6%26%5%345%6%8%43%
1620
11th to 20thNight
12%5%25%5%345%5%7%48%
1593
21st to endNight
10%434425%5%6%10%47%
1745
June1st to 10thNight
421342346%11%59%
1620
11th to 20thNight
4213425%5%6%10%58%
1620
21st to endNight
5%4245%35%5%8%10%48%
1620
July1st to 10thNight
7%4245%35%5%7%11%47%
1620
11th to 20thNight
32123345%6%10%62%
1620
21st to endNight
3213325%45%13%58%
1772
August1st to 10thNight
11222346%11%68%
1611
11th to 20thNight
44244345%8%11%52%
1659
21st to endNight
43135%45%6%8%12%49%
2137
September1st to 10thNight
6%4245%35%46%10%51%
1980
11th to 20thNight
8%6%25%5%35%46%8%46%
1980
21st to endNight
8%4245%3446%8%52%
1980
October1st to 10thNight
332332345%7%64%
1980
11th to 20thNight
12%5%2333335%5%56%
2142
21st to endNight
14%413313335%60%
2376
November1st to 10thNight
12%424433446%54%
2220
11th to 20thNight
11%6%24434347%52%
2313
21st to endNight
18%6%345%23347%45%
2470
December1st to 10thNight
17%6%35%434345%48%
2470
11th to 20thNight
18%8%34423346%44%
3036
21st to endNight
17%6%24323345%52%
4532

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
40%25%18%23%12%
1708
11th to 20thDay
41%25%18%19%14%
1634
21st to endDay
38%25%15%25%15%
1832
February1st to 10thDay
46%26%13%20%14%
1800
11th to 20thDay
45%26%18%18%10%
1759
21st to endDay
44%27%16%17%14%
1516
March1st to 10thDay
49%28%13%19%9%
1980
11th to 20thDay
46%26%12%21%13%
1980
21st to endDay
41%37%18%21%10%
2178
April1st to 10thDay
44%37%20%15%10%
1980
11th to 20thDay
46%26%16%19%10%
1979
21st to endDay
40%36%22%22%8%
2227
May1st to 10thDay
44%49%18%16%9%
2340
11th to 20thDay
41%410%22%18%5%
2306
21st to endDay
44%5%11%24%14%2
2531
June1st to 10thDay
31%415%28%20%2
2340
11th to 20thDay
31%5%13%29%18%4
2340
21st to endDay
41%7%13%24%13%2
2340
July1st to 10thDay
41%6%17%25%10%1
2276
11th to 20thDay
31%6%20%26%17%2
2271
21st to endDay
26%5%23%33%11%1
2405
August1st to 10thDay
23%417%37%18%1
2314
11th to 20thDay
31%5%19%29%12%3
2237
21st to endDay
34%6%18%27%11%3
2218
September1st to 10thDay
38%5%11%23%16%7%
1980
11th to 20thDay
42%6%12%18%17%5%
1980
21st to endDay
35%49%22%17%13%
1980
October1st to 10thDay
28%410%24%23%12%
1980
11th to 20thDay
37%25%17%22%17%
1800
21st to endDay
33%2416%26%20%
1980
November1st to 10thDay
38%27%21%21%11%
1858
11th to 20thDay
35%39%18%22%14%
1862
21st to endDay
44%35%16%18%13%
1710
December1st to 10thDay
43%28%19%20%7%
1710
11th to 20thDay
45%16%13%23%12%
2159
21st to endDay
40%15%16%26%13%
3135
January1st to 10thNight
37%25%18%23%15%
2458
11th to 20thNight
39%25%17%22%14%
2366
21st to endNight
40%2417%20%18%
2539
February1st to 10thNight
44%26%13%19%16%
2160
11th to 20thNight
41%26%17%19%14%
2098
21st to endNight
46%15%16%16%15%
1738
March1st to 10thNight
42%410%17%18%9%
1980
11th to 20thNight
44%39%13%19%12%
1980
21st to endNight
37%311%16%20%13%
2178
April1st to 10thNight
38%410%19%18%11%
1980
11th to 20thNight
40%210%17%16%15%
1927
21st to endNight
38%28%24%19%9%
1728
May1st to 10thNight
40%311%20%17%9%
1620
11th to 20thNight
35%412%27%18%4
1594
21st to endNight
33%417%31%14%1
1746
June1st to 10thNight
22%419%31%22%3
1620
11th to 20thNight
22%415%35%20%4
1620
21st to endNight
30%6%17%29%16%2
1620
July1st to 10thNight
31%5%24%30%9%
1575
11th to 20thNight
18%5%26%35%15%1
1566
21st to endNight
19%5%29%38%9%
1673
August1st to 10thNight
12%427%39%18%1
1601
11th to 20thNight
24%7%24%32%10%2
1659
21st to endNight
26%8%24%28%10%4
2137
September1st to 10thNight
29%6%18%24%16%7%
1980
11th to 20thNight
35%5%16%23%15%6%
1980
21st to endNight
30%415%20%18%13%
1980
October1st to 10thNight
21%310%29%24%13%
1980
11th to 20thNight
31%38%19%21%18%
2142
21st to endNight
30%26%19%22%23%
2376
November1st to 10thNight
33%39%21%21%13%
2220
11th to 20thNight
34%39%20%20%14%
2313
21st to endNight
41%18%18%17%14%
2470
December1st to 10thNight
41%26%22%18%11%
2470
11th to 20thNight
43%16%13%21%16%
3037
21st to endNight
37%25%16%29%12%
4532

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
21%11%35%25%7%1
270
11th to 20thDay
26%9%28%29%7%2
245
21st to endDay
22%15%36%20%7%
264
February1st to 10thDay
32%15%25%21%7%1
240
11th to 20thDay
30%18%30%16%6%
240
21st to endDay
31%19%32%15%31
198
March1st to 10thDay
25%14%36%19%5%1
240
11th to 20thDay
20%14%38%20%8%1
240
21st to endDay
21%13%38%19%8%1
264
April1st to 10thDay
24%9%39%22%5%1
240
11th to 20thDay
21%15%30%23%9%1
257
21st to endDay
20%10%34%26%9%1
487
May1st to 10thDay
15%9%37%30%10%
603
11th to 20thDay
15%7%24%34%16%3
625
21st to endDay
14%5%23%33%22%3
679
June1st to 10thDay
6%111%37%33%10%
630
11th to 20thDay
7%111%44%29%8%
630
21st to endDay
7%210%33%32%16%
630
July1st to 10thDay
9%35%29%38%16%
621
11th to 20thDay
31328%49%15%
618
21st to endDay
32327%50%15%
684
August1st to 10thDay
32226%50%18%
626
11th to 20thDay
6%3323%49%17%
551
21st to endDay
8%3320%31%34%
337
September1st to 10thDay
6%1221%43%27%
270
11th to 20thDay
6%15%25%41%21%
270
21st to endDay
9%1426%42%17%
270
October1st to 10thDay
4113%31%39%11%
270
11th to 20thDay
15%317%32%26%7%
270
21st to endDay
21%8%26%22%18%5%
297
November1st to 10thDay
19%6%21%31%17%7%
270
11th to 20thDay
21%7%23%31%15%3
270
21st to endDay
24%13%31%20%10%2
270
December1st to 10thDay
20%6%35%22%12%5%
270
11th to 20thDay
25%11%29%26%7%1
270
21st to endDay
24%10%36%21%7%2
297
January1st to 10thNight
22%8%29%31%8%
950
11th to 20thNight
23%11%27%31%8%
910
21st to endNight
21%10%30%32%7%
955
February1st to 10thNight
24%11%30%29%5%
720
11th to 20thNight
26%9%34%27%5%
704
21st to endNight
28%11%38%20%3
554
March1st to 10thNight
22%9%39%25%4
540
11th to 20thNight
21%8%35%32%4
540
21st to endNight
17%10%42%26%41
594
April1st to 10thNight
14%10%44%28%3
540
11th to 20thNight
19%9%40%27%6%
533
21st to endNight
16%8%41%25%9%1
540
May1st to 10thNight
15%7%43%29%5%1
540
11th to 20thNight
13%5%34%36%11%1
531
21st to endNight
11%429%40%15%1
584
June1st to 10thNight
5%216%51%26%1
540
11th to 20thNight
5%125%51%16%1
540
21st to endNight
4311%47%30%5%
540
July1st to 10thNight
6%28%48%32%4
525
11th to 20thNight
310%48%35%3
522
21st to endNight
317%52%34%4
591
August1st to 10thNight
17%57%32%3
537
11th to 20thNight
5%15%52%31%6%
534
21st to endNight
5%15%40%43%7%
594
September1st to 10thNight
7%25%39%42%5%
540
11th to 20thNight
10%26%37%41%4
540
21st to endNight
11%112%34%37%4
540
October1st to 10thNight
4112%47%30%5%
540
11th to 20thNight
15%419%42%19%2
702
21st to endNight
14%7%25%32%19%2
792
November1st to 10thNight
12%323%40%21%1
740
11th to 20thNight
14%7%24%38%16%1
793
21st to endNight
20%9%27%28%14%1
950
December1st to 10thNight
21%6%28%32%13%1
950
11th to 20thNight
25%9%27%31%8%1
950
21st to endNight
21%8%31%33%8%
1045
Page generated at 2024-01-09 15:24:24. Version ac07

Copyright 2024 Attilla Danko


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