Weilmunster Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Weilmunster Park clear sky chart from 2005-11-05 to 2018-01-20.

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
57%
15243
19%
48450
17%
15217
60%
15217
26%
30543

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
43%
776
9%
2716
8%
776
45%
776
14%
2021
January16th to endNight
50%
788
13%
2758
15%
788
52%
788
18%
1896
February1st to 15thNight
40%
698
9%
2269
7%
696
44%
696
16%
1674
February16th to endNight
43%
632
11%
1895
10%
632
46%
632
16%
1428
March1st to 15thNight
43%
720
9%
2148
8%
720
45%
720
16%
1605
March16th to endNight
44%
768
12%
2052
8%
768
46%
768
21%
1500
April1st to 15thNight
49%
719
17%
1799
9%
719
51%
719
27%
1253
April16th to endNight
55%
558
23%
1638
16%
558
58%
558
31%
987
May1st to 15thNight
62%
539
20%
1619
16%
539
66%
539
36%
909
May16th to endNight
64%
376
16%
1498
24%
376
66%
376
25%
858
June1st to 15thNight
65%
360
16%
1440
23%
360
69%
360
27%
804
June16th to endNight
79%
360
24%
1440
37%
360
83%
360
42%
627
July1st to 15thNight
87%
340
23%
1360
37%
340
90%
340
53%
517
July16th to endNight
87%
376
34%
1416
49%
354
88%
354
58%
512
August1st to 15thNight
82%
482
32%
1555
32%
480
83%
480
53%
706
August16th to endNight
82%
675
37%
1821
27%
675
83%
675
64%
868
September1st to 15thNight
84%
720
34%
1854
24%
720
86%
720
62%
939
September16th to endNight
70%
716
34%
1980
28%
716
72%
716
43%
1122
October1st to 15thNight
65%
720
25%
2024
21%
720
68%
720
38%
1174
October16th to endNight
61%
768
23%
2496
24%
768
65%
768
29%
1506
November1st to 15thNight
52%
760
18%
2470
19%
760
54%
760
21%
1664
November16th to endNight
46%
780
13%
2560
11%
780
49%
780
18%
1790
December1st to 15thNight
45%
780
10%
2730
7%
780
48%
780
15%
1959
December16th to endNight
34%
832
11%
2912
9%
832
39%
832
12%
2224

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
10%8%35%5%24446%45%
49097
Night
11%8%24424446%44%
48623
TransparencyDay
39%5%10%19%16%8%
48768
Night
40%5%11%20%15%6%
48451
SeeingDay
14%13%31%28%10%2
5697
Night
16%415%36%24%2
15255

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 15thDay
15%13%5%6%6%4345%5%29%
1552
16th to endDay
15%13%46%6%33346%31%
1569
February1st to 15thDay
14%13%5%6%6%35%5%45%28%
1592
16th to endDay
12%18%7%6%6%25%45%6%23%
1579
March1st to 15thDay
15%15%5%7%6%25%45%6%24%
1812
16th to endDay
18%13%46%6%35%447%24%
2171
April1st to 15thDay
11%11%48%7%346%47%30%
2149
16th to endDay
12%10%35%424445%42%
2322
May1st to 15thDay
8%6%25%6%3445%8%44%
2331
16th to endDay
10%8%37%7%45%5%5%7%35%
2610
June1st to 15thDay
12%5%247%35%46%7%38%
2520
16th to endDay
6%213323345%63%
2520
July1st to 15thDay
2211313346%69%
2520
16th to endDay
21221333473%
2657
August1st to 15thDay
3112323245%69%
2397
16th to endDay
212213335%72%
2378
September1st to 15thDay
421232223470%
2106
16th to endDay
8%413323346%57%
1980
October1st to 15thDay
9%425%4345%46%49%
1932
16th to endDay
11%7%36%6%34336%42%
1728
November1st to 15thDay
16%13%36%5%2345%7%31%
1719
16th to endDay
15%12%5%5%6%24445%32%
1729
December1st to 15thDay
18%12%47%423346%31%
1560
16th to endDay
20%14%48%42343428%
1664
January1st to 15thNight
18%13%45%6%335%46%28%
2716
16th to endNight
15%13%35%424336%36%
2758
February1st to 15thNight
16%14%47%5%23445%31%
2258
16th to endNight
13%15%5%6%435%5%46%29%
1895
March1st to 15thNight
15%14%46%6%34445%30%
2148
16th to endNight
14%12%35%4345%5%8%32%
2052
April1st to 15thNight
11%6%25%5%35%5%5%7%39%
1799
16th to endNight
12%424424445%51%
1638
May1st to 15thNight
5%4143345%46%53%
1619
16th to endNight
7%6%26%5%3445%10%43%
1498
June1st to 15thNight
11%314335%45%7%48%
1440
16th to endNight
5%2232345%6%63%
1440
July1st to 15thNight
1131346%8%68%
1440
16th to endNight
1212225%475%
1512
August1st to 15thNight
322312446%67%
1563
16th to endNight
112312235%74%
1821
September1st to 15thNight
122313345%72%
1854
16th to endNight
9%313413335%60%
1980
October1st to 15thNight
9%413423446%54%
2024
16th to endNight
12%6%235%2345%6%46%
2496
November1st to 15thNight
19%8%245%3345%7%36%
2470
16th to endNight
17%12%3443445%5%34%
2560
December1st to 15thNight
15%12%36%5%35%5%5%6%30%
2730
16th to endNight
19%16%47%5%2443426%
2912

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
56%10%14%15%3
1552
16th to endDay
53%7%17%15%5%
1569
February1st to 15thDay
57%8%14%16%3
1592
16th to endDay
61%8%10%15%2
1579
March1st to 15thDay
60%6%12%15%5%
1812
16th to endDay
60%5%11%16%4
2171
April1st to 15thDay
53%6%14%18%6%
2149
16th to endDay
44%5%10%25%12%1
2322
May1st to 15thDay
37%6%9%31%12%2
2331
16th to endDay
47%7%10%21%11%2
2614
June1st to 15thDay
42%6%9%21%15%3
2520
16th to endDay
23%45%22%31%13%
2520
July1st to 15thDay
16%35%15%30%28%
2371
16th to endDay
12%328%28%44%
2490
August1st to 15thDay
18%3416%30%26%
2380
16th to endDay
15%3417%37%21%
2378
September1st to 15thDay
18%35%19%32%20%
2106
16th to endDay
27%47%28%23%7%
1980
October1st to 15thDay
35%5%12%23%19%4
1932
16th to endDay
44%5%12%21%17%
1728
November1st to 15thDay
51%6%13%19%8%
1719
16th to endDay
53%414%17%7%1
1729
December1st to 15thDay
54%6%18%17%2
1560
16th to endDay
59%6%12%16%4
1664
January1st to 15thNight
57%6%16%14%4
2716
16th to endNight
49%6%15%19%8%
2758
February1st to 15thNight
54%6%14%18%5%
2269
16th to endNight
56%7%14%16%41
1895
March1st to 15thNight
55%6%13%17%5%
2148
16th to endNight
49%8%15%19%7%
2052
April1st to 15thNight
43%6%14%24%10%
1799
16th to endNight
35%413%27%17%1
1638
May1st to 15thNight
29%5%12%32%19%1
1620
16th to endNight
37%5%12%30%12%1
1498
June1st to 15thNight
34%6%10%30%14%4
1440
16th to endNight
20%46%23%30%14%
1440
July1st to 15thNight
13%36%15%33%27%
1360
16th to endNight
12%2211%29%41%
1416
August1st to 15thNight
16%4416%30%27%
1555
16th to endNight
13%35%16%32%28%
1821
September1st to 15thNight
15%35%18%34%22%
1854
16th to endNight
28%35%24%25%12%
1980
October1st to 15thNight
31%411%27%20%3
2024
16th to endNight
37%413%22%20%1
2496
November1st to 15thNight
47%5%13%21%11%
2470
16th to endNight
50%5%13%20%7%1
2560
December1st to 15thNight
52%7%16%15%6%
2730
16th to endNight
61%5%12%15%5%
2912

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
21%6%17%25%18%10%
90
16th to endDay
30%423%23%15%2
72
February1st to 15thDay
25%429%16%20%3
155
16th to endDay
23%15%34%19%5%
238
March1st to 15thDay
27%16%31%20%4
270
16th to endDay
26%23%26%19%3
288
April1st to 15thDay
15%21%29%20%9%2
269
16th to endDay
21%21%31%20%5%
270
May1st to 15thDay
11%16%37%25%7%1
288
16th to endDay
14%13%24%28%14%4
330
June1st to 15thDay
10%16%37%24%8%2
315
16th to endDay
7%15%38%26%9%3
315
July1st to 15thDay
310%34%35%12%3
305
16th to endDay
114%40%33%8%1
327
August1st to 15thDay
5%10%39%35%8%1
315
16th to endDay
39%31%37%15%2
332
September1st to 15thDay
7%8%28%37%14%2
315
16th to endDay
12%5%34%34%11%
315
October1st to 15thDay
11%11%32%29%11%1
294
16th to endDay
18%6%20%34%17%2
144
November1st to 15thDay
20%8%18%34%18%
135
16th to endDay
22%14%31%20%9%1
129
December1st to 15thDay
40%420%14%12%8%
90
16th to endDay
22%8%21%35%10%1
96
January1st to 15thNight
27%414%31%18%3
780
16th to endNight
23%315%29%24%3
788
February1st to 15thNight
25%319%30%18%1
704
16th to endNight
20%5%20%35%15%2
632
March1st to 15thNight
21%6%19%33%16%2
720
16th to endNight
21%7%21%34%13%
768
April1st to 15thNight
14%6%20%34%20%3
719
16th to endNight
15%5%17%41%18%1
558
May1st to 15thNight
7%6%17%41%25%1
540
16th to endNight
10%412%35%34%2
377
June1st to 15thNight
11%214%42%25%3
360
16th to endNight
6%17%48%34%
360
July1st to 15thNight
16%50%39%2
340
16th to endNight
35%49%38%2
376
August1st to 15thNight
425%41%43%2
482
16th to endNight
118%42%40%4
675
September1st to 15thNight
37%44%40%3
720
16th to endNight
11%29%32%35%7%
716
October1st to 15thNight
10%314%40%27%3
720
16th to endNight
16%213%38%26%3
768
November1st to 15thNight
25%313%34%21%2
760
16th to endNight
24%5%18%31%17%3
780
December1st to 15thNight
22%417%33%17%3
780
16th to endNight
28%5%21%29%12%1
832
Page generated at 2018-01-21 10:19:33. Version ac04

Copyright 2018 A. Danko


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