Monument Hill & Kreische Brewery State Historic Site
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Monument Hill & Kreische Brewery State Historic Site clear sky chart from 2005-11-05 to 2017-09-21.

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
52%
15405
25%
46978
18%
15361
58%
15361
32%
27614

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 15thNight
36%
896
24%
2327
11%
895
44%
895
30%
1526
January16th to endNight
36%
951
27%
2487
11%
951
45%
951
31%
1598
February1st to 15thNight
34%
704
26%
2108
12%
699
45%
699
27%
1295
February16th to endNight
27%
590
26%
1852
9%
590
41%
590
25%
1119
March1st to 15thNight
32%
540
26%
1980
14%
540
47%
540
23%
1206
March16th to endNight
33%
576
23%
2112
15%
576
44%
576
25%
1207
April1st to 15thNight
32%
539
22%
1977
12%
539
46%
539
25%
1133
April16th to endNight
34%
540
23%
1810
16%
540
46%
540
26%
1091
May1st to 15thNight
38%
539
21%
1620
16%
539
46%
539
29%
1007
May16th to endNight
55%
563
24%
1684
21%
561
62%
561
35%
977
June1st to 15thNight
74%
540
21%
1620
24%
540
77%
540
49%
808
June16th to endNight
76%
540
20%
1620
23%
540
79%
540
35%
967
July1st to 15thNight
78%
510
20%
1530
23%
510
80%
510
43%
817
July16th to endNight
84%
564
22%
1594
26%
531
86%
531
44%
856
August1st to 15thNight
88%
539
27%
1610
31%
536
89%
536
56%
760
August16th to endNight
78%
573
18%
1991
22%
573
79%
573
29%
1164
September1st to 15thNight
77%
540
19%
1980
23%
540
79%
540
32%
1094
September16th to endNight
70%
510
25%
1881
28%
510
72%
510
29%
1074
October1st to 15thNight
70%
550
34%
1870
31%
550
73%
550
43%
919
October16th to endNight
61%
704
35%
2112
26%
704
66%
704
46%
1094
November1st to 15thNight
54%
700
27%
2100
20%
700
58%
700
33%
1248
November16th to endNight
49%
837
30%
2277
18%
837
55%
837
37%
1331
December1st to 15thNight
38%
900
25%
2340
14%
900
44%
900
27%
1592
December16th to endNight
37%
960
21%
2496
10%
960
42%
960
26%
1731

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
11%5%25%5%35%5%5%7%42%
47873
Night
10%5%24423347%50%
47178
TransparencyDay
39%6%11%18%16%8%
47573
Night
33%5%12%21%17%10%
46983
SeeingDay
10%416%27%29%11%
5383
Night
13%5%23%35%20%1
15410

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 15thDay
19%5%15%41434444%
1611
16th to endDay
18%6%23312245%48%
1748
February1st to 15thDay
18%5%2432233449%
1750
16th to endDay
17%6%36%332335%44%
1620
March1st to 15thDay
20%7%25%423326%39%
1980
16th to endDay
16%7%35%323335%44%
2110
April1st to 15thDay
13%6%35%5%45%347%40%
1971
16th to endDay
13%6%36%43435%6%42%
2145
May1st to 15thDay
11%7%36%6%35%5%6%8%36%
2331
16th to endDay
11%6%25%5%36%5%7%8%36%
2430
June1st to 15thDay
4325%6%47%6%7%9%42%
2340
16th to endDay
7%426%7%5%8%8%8%9%31%
2340
July1st to 15thDay
7%436%7%47%6%7%11%35%
2340
16th to endDay
5%325%7%47%7%8%11%35%
2466
August1st to 15thDay
2245%36%6%7%10%50%
2340
16th to endDay
7%416%7%47%6%7%11%35%
2205
September1st to 15thDay
8%5%36%6%45%6%5%7%41%
1980
16th to endDay
7%5%26%5%35%6%5%7%43%
1871
October1st to 15thDay
8%425%5%34447%50%
1749
16th to endDay
9%21231324462%
1760
November1st to 15thDay
10%5%35%42345%7%46%
1758
16th to endDay
13%5%23322435%52%
1680
December1st to 15thDay
20%8%35%323335%39%
1620
16th to endDay
15%8%35%334445%39%
1728
January1st to 15thNight
18%7%24313236%46%
2327
16th to endNight
19%5%14322235%48%
2487
February1st to 15thNight
15%7%23323235%49%
2102
16th to endNight
15%5%24423345%48%
1852
March1st to 15thNight
18%7%23323336%45%
1980
16th to endNight
12%5%3441435%6%49%
2112
April1st to 15thNight
10%6%25%42345%8%46%
1977
16th to endNight
14%6%14424346%46%
1810
May1st to 15thNight
7%6%26%5%35%449%44%
1619
16th to endNight
4324425%6%6%10%49%
1683
June1st to 15thNight
311332335%12%58%
1620
16th to endNight
3313436%6%7%10%48%
1620
July1st to 15thNight
432332345%8%58%
1620
16th to endNight
32123245%5%12%55%
1702
August1st to 15thNight
111121345%10%65%
1620
16th to endNight
5%3245%35%5%7%12%45%
1991
September1st to 15thNight
5%324425%45%11%49%
1980
16th to endNight
8%415%5%35%45%8%48%
1881
October1st to 15thNight
6%313313248%60%
1870
16th to endNight
8%312212235%65%
2112
November1st to 15thNight
8%5%25%5%24346%50%
2100
16th to endNight
12%5%13422335%56%
2277
December1st to 15thNight
18%7%235%23345%42%
2340
16th to endNight
18%7%25%423345%41%
2496

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 15thDay
43%36%14%21%10%
1612
16th to endDay
38%26%15%21%14%
1748
February1st to 15thDay
38%36%17%18%15%
1751
16th to endDay
43%37%14%19%11%
1620
March1st to 15thDay
47%46%10%20%10%
1980
16th to endDay
42%37%15%22%8%
2112
April1st to 15thDay
44%46%16%16%11%
1971
16th to endDay
42%48%19%16%9%
2145
May1st to 15thDay
44%6%10%15%15%7%
2331
16th to endDay
42%8%12%19%14%3
2434
June1st to 15thDay
34%8%12%21%19%3
2340
16th to endDay
42%11%13%19%11%1
2340
July1st to 15thDay
37%9%17%23%10%1
2201
16th to endDay
35%10%22%25%5%
2311
August1st to 15thDay
26%9%19%32%12%
2326
16th to endDay
39%11%18%19%7%2
2205
September1st to 15thDay
39%9%13%19%13%4
1980
16th to endDay
37%6%10%19%15%9%
1871
October1st to 15thDay
33%5%9%18%17%15%
1749
16th to endDay
25%3418%27%19%
1760
November1st to 15thDay
36%6%10%18%17%11%
1758
16th to endDay
34%37%13%20%19%
1680
December1st to 15thDay
48%37%16%16%8%
1620
16th to endDay
45%5%8%14%17%8%
1728
January1st to 15thNight
40%36%15%19%14%
2327
16th to endNight
39%25%15%20%15%
2487
February1st to 15thNight
38%36%13%20%17%
2112
16th to endNight
38%46%17%19%14%
1852
March1st to 15thNight
42%38%14%18%11%
1980
16th to endNight
35%5%9%17%20%10%
2112
April1st to 15thNight
35%5%10%17%17%12%
1977
16th to endNight
38%411%18%14%11%
1810
May1st to 15thNight
37%5%12%20%14%9%
1620
16th to endNight
29%7%17%27%14%3
1685
June1st to 15thNight
20%5%17%30%24%2
1620
16th to endNight
27%10%17%30%12%1
1620
July1st to 15thNight
23%6%24%35%9%
1530
16th to endNight
20%9%29%33%6%
1594
August1st to 15thNight
13%6%28%37%13%
1610
16th to endNight
28%12%24%25%6%2
1991
September1st to 15thNight
29%7%20%23%13%5%
1980
16th to endNight
33%6%14%19%16%9%
1881
October1st to 15thNight
23%413%25%19%14%
1870
16th to endNight
24%35%18%26%22%
2112
November1st to 15thNight
34%5%11%20%18%10%
2100
16th to endNight
31%38%14%20%21%
2277
December1st to 15thNight
44%48%18%16%8%
2340
16th to endNight
46%36%14%17%12%
2496

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 15thDay
22%334%32%7%
90
16th to endDay
22%13%34%17%9%2
96
February1st to 15thDay
8%18%37%20%12%2
90
16th to endDay
17%11%37%27%7%
81
March1st to 15thDay
23%14%34%13%14%
90
16th to endDay
14%9%22%35%16%1
96
April1st to 15thDay
11%14%32%24%15%2
90
16th to endDay
20%432%27%13%
255
May1st to 15thDay
12%9%39%28%10%
468
16th to endDay
15%427%32%16%3
517
June1st to 15thDay
5%9%36%38%9%
495
16th to endDay
7%210%30%34%15%
495
July1st to 15thDay
416%31%40%15%
475
16th to endDay
41322%47%20%
515
August1st to 15thDay
5%219%50%22%
493
16th to endDay
13%2324%33%23%
245
September1st to 15thDay
5%318%45%26%
135
16th to endDay
5%112%49%29%
105
October1st to 15thDay
3328%50%14%
90
16th to endDay
18%29%22%37%9%
96
November1st to 15thDay
14%230%31%16%5%
90
16th to endDay
22%11%22%24%12%7%
90
December1st to 15thDay
30%5%17%26%11%8%
90
16th to endDay
20%14%33%23%7%
96
January1st to 15thNight
21%9%28%30%10%
900
16th to endNight
20%11%29%31%7%
951
February1st to 15thNight
20%10%30%31%6%
704
16th to endNight
17%11%40%25%4
590
March1st to 15thNight
22%7%34%29%5%
540
16th to endNight
14%8%40%30%6%
576
April1st to 15thNight
12%9%41%33%3
539
16th to endNight
16%7%37%27%8%1
540
May1st to 15thNight
9%7%42%32%7%
540
16th to endNight
4330%42%17%
563
June1st to 15thNight
4113%55%25%
540
16th to endNight
3111%47%31%3
540
July1st to 15thNight
48%46%36%4
510
16th to endNight
3343%43%5%
564
August1st to 15thNight
2244%44%4
539
16th to endNight
7%433%49%5%
573
September1st to 15thNight
6%6%30%50%5%
540
16th to endNight
9%10%27%44%7%
510
October1st to 15thNight
6%214%43%27%5%
550
16th to endNight
8%6%20%35%25%3
704
November1st to 15thNight
10%5%24%38%19%1
700
16th to endNight
15%6%23%34%18%1
837
December1st to 15thNight
23%8%25%30%11%
900
16th to endNight
23%9%26%31%9%
960
Page generated at 2017-09-22 06:35:30. Version ac04

Copyright 2017 A. Danko


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