Capon Springs and Farms
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Capon Springs and Farms 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
34%
15767
20%
48529
10%
15729
45%
15729
20%
30528

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
19%
777
20%
2551
8%
776
35%
776
14%
1613
January16th to endNight
16%
788
21%
2560
6%
788
35%
788
15%
1625
February1st to 15thNight
19%
702
19%
2287
5%
701
36%
701
15%
1421
February16th to endNight
15%
631
20%
1934
4%
631
33%
631
13%
1261
March1st to 15thNight
19%
720
21%
1980
7%
720
33%
720
18%
1289
March16th to endNight
19%
768
19%
2112
7%
768
30%
768
17%
1401
April1st to 15thNight
23%
718
18%
1811
5%
718
30%
718
20%
1240
April16th to endNight
32%
690
19%
1770
6%
690
40%
690
22%
1195
May1st to 15thNight
33%
540
16%
1620
7%
540
41%
540
18%
1098
May16th to endNight
41%
423
17%
1546
12%
423
50%
423
19%
951
June1st to 15thNight
45%
360
19%
1440
15%
360
57%
360
22%
826
June16th to endNight
51%
360
18%
1440
17%
360
61%
360
23%
821
July1st to 15thNight
51%
402
12%
1422
11%
402
55%
402
20%
909
July16th to endNight
59%
564
16%
1595
11%
531
67%
531
34%
941
August1st to 15thNight
59%
539
19%
1609
14%
536
62%
536
29%
993
August16th to endNight
62%
708
22%
1854
15%
708
64%
708
33%
1159
September1st to 15thNight
53%
720
25%
1800
14%
720
58%
720
33%
1169
September16th to endNight
50%
717
25%
2006
18%
717
56%
717
28%
1270
October1st to 15thNight
45%
720
23%
2160
19%
720
53%
720
26%
1337
October16th to endNight
35%
768
30%
2304
15%
768
55%
768
28%
1324
November1st to 15thNight
35%
760
25%
2356
15%
760
48%
760
24%
1425
November16th to endNight
27%
780
23%
2730
10%
780
45%
780
17%
1619
December1st to 15thNight
24%
780
17%
2730
6%
780
37%
780
12%
1785
December16th to endNight
21%
832
20%
2912
7%
832
38%
832
13%
1856

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%5%35%5%35%5%5%7%38%
48981
Night
12%5%2443445%7%43%
48717
Cloud CoverDay
13%6%25%5%35%5%5%7%39%
48991
Night
13%5%2443445%7%43%
48721
TransparencyDay
42%6%11%21%14%2
48687
Night
38%6%12%23%16%2
48529
SeeingDay
17%19%21%20%15%6%
5967
Night
14%25%20%25%13%1
15773

By Month

Percentage Cloud Cover NE (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
12%6%45%6%35%6%5%8%36%
1714
16th to endDay
13%6%46%6%34445%39%
1768
February1st to 15thDay
11%10%46%6%35%45%6%36%
1575
16th to endDay
12%7%36%5%35%346%40%
1537
March1st to 15thDay
15%6%35%434335%43%
1969
16th to endDay
15%8%35%5%25%5%47%36%
2112
April1st to 15thDay
11%6%35%5%35%45%7%40%
2136
16th to endDay
16%5%245%24446%41%
2199
May1st to 15thDay
19%5%26%5%345%5%7%34%
2331
16th to endDay
15%425%7%35%447%37%
2567
June1st to 15thDay
11%4245%35%6%6%10%39%
2520
16th to endDay
9%425%6%47%6%7%9%38%
2520
July1st to 15thDay
10%5%46%6%47%6%6%9%34%
2450
16th to endDay
8%426%6%47%7%7%10%34%
2465
August1st to 15thDay
10%5%26%8%47%7%6%9%31%
2340
16th to endDay
11%425%5%46%6%7%8%37%
2336
September1st to 15thDay
14%425%43445%6%43%
2160
16th to endDay
15%5%245%45%5%5%7%38%
1952
October1st to 15thDay
20%423324446%43%
1800
16th to endDay
13%5%25%5%2245%5%47%
1920
November1st to 15thDay
12%5%2442445%6%47%
1826
16th to endDay
16%5%245%25%446%42%
1560
December1st to 15thDay
16%7%235%35%5%6%6%37%
1560
16th to endDay
15%7%35%5%35%5%5%7%35%
1664
January1st to 15thNight
14%6%244245%5%7%40%
2551
16th to endNight
14%8%45%32445%7%40%
2560
February1st to 15thNight
12%7%244245%5%7%43%
2285
16th to endNight
10%7%25%6%36%5%5%6%39%
1934
March1st to 15thNight
15%5%15%5%245%5%6%42%
1968
16th to endNight
15%5%36%5%34345%42%
2112
April1st to 15thNight
12%5%25%5%36%5%6%6%40%
1811
16th to endNight
14%5%244345%46%43%
1770
May1st to 15thNight
16%5%35%5%34447%38%
1620
16th to endNight
12%5%24435%448%44%
1544
June1st to 15thNight
10%324335%5%6%8%46%
1440
16th to endNight
8%424425%5%7%10%43%
1440
July1st to 15thNight
10%425%6%446%6%8%39%
1507
16th to endNight
5%313435%6%7%10%46%
1703
August1st to 15thNight
8%5%235%35%5%6%8%45%
1620
16th to endNight
9%42442445%10%46%
1854
September1st to 15thNight
12%415%32346%8%46%
1800
16th to endNight
13%5%14333346%48%
2006
October1st to 15thNight
18%413324446%46%
2160
16th to endNight
13%313323346%52%
2304
November1st to 15thNight
13%6%2342335%5%48%
2356
16th to endNight
13%5%244245%5%7%44%
2730
December1st to 15thNight
14%5%36%5%36%5%5%6%37%
2730
16th to endNight
13%6%25%5%35%5%6%8%37%
2912

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
12%6%35%5%45%6%5%7%37%
1714
16th to endDay
13%6%36%6%34345%40%
1768
February1st to 15thDay
11%9%36%6%35%45%6%37%
1575
16th to endDay
12%6%46%5%35%346%40%
1537
March1st to 15thDay
14%6%25%5%34335%43%
1980
16th to endDay
14%9%25%5%345%5%6%36%
2111
April1st to 15thDay
11%6%35%435%5%6%7%41%
2136
16th to endDay
16%5%25%4245%5%5%42%
2199
May1st to 15thDay
19%6%35%5%35%45%7%34%
2331
16th to endDay
15%5%25%6%35%45%6%37%
2567
June1st to 15thDay
10%424435%6%6%9%40%
2520
16th to endDay
9%415%6%46%6%6%9%38%
2520
July1st to 15thDay
9%6%36%6%47%5%7%8%34%
2450
16th to endDay
8%4346%37%7%7%10%34%
2465
August1st to 15thDay
10%5%26%7%48%6%7%8%32%
2340
16th to endDay
11%415%5%46%6%6%9%37%
2336
September1st to 15thDay
14%5%25%43445%6%42%
2160
16th to endDay
15%5%25%6%4445%6%39%
1952
October1st to 15thDay
20%423323446%44%
1800
16th to endDay
13%415%43345%5%47%
1920
November1st to 15thDay
12%5%2433445%6%47%
1826
16th to endDay
16%5%245%24447%42%
1560
December1st to 15thDay
15%6%35%435%5%6%6%37%
1560
16th to endDay
15%8%346%25%5%6%6%35%
1664
January1st to 15thNight
14%6%24435%5%5%7%41%
2551
16th to endNight
14%9%25%42445%6%41%
2560
February1st to 15thNight
12%7%234245%6%6%44%
2278
16th to endNight
10%7%346%36%6%5%7%39%
1934
March1st to 15thNight
15%5%245%3446%6%43%
1980
16th to endNight
14%5%36%5%24445%42%
2112
April1st to 15thNight
13%6%25%5%35%5%5%6%40%
1811
16th to endNight
15%5%23425%5%5%6%44%
1770
May1st to 15thNight
17%6%245%35%447%39%
1619
16th to endNight
13%4235%3445%8%44%
1544
June1st to 15thNight
9%423435%5%5%9%46%
1440
16th to endNight
8%424436%47%10%44%
1440
July1st to 15thNight
10%4246%445%7%9%39%
1507
16th to endNight
5%313426%5%8%10%46%
1703
August1st to 15thNight
8%425%435%5%6%8%45%
1620
16th to endNight
10%42342346%9%46%
1854
September1st to 15thNight
12%42443445%7%46%
1800
16th to endNight
14%5%15%423447%47%
2006
October1st to 15thNight
18%414323446%46%
2160
16th to endNight
13%412323447%52%
2304
November1st to 15thNight
13%7%23323346%48%
2356
16th to endNight
13%4244245%5%7%44%
2730
December1st to 15thNight
14%5%37%5%35%5%5%6%37%
2730
16th to endNight
12%6%25%6%345%5%8%38%
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
43%7%10%20%15%2
1715
16th to endDay
45%411%22%14%2
1768
February1st to 15thDay
46%5%12%18%14%2
1577
16th to endDay
43%5%12%23%13%1
1537
March1st to 15thDay
43%410%24%13%2
1980
16th to endDay
46%6%11%18%15%2
2112
April1st to 15thDay
40%5%11%20%17%3
2136
16th to endDay
42%5%9%20%16%5%
2199
May1st to 15thDay
47%7%11%19%12%
2331
16th to endDay
46%6%12%22%10%2
2571
June1st to 15thDay
38%9%13%23%14%
2520
16th to endDay
39%9%15%19%14%2
2520
July1st to 15thDay
43%9%11%18%12%3
2306
16th to endDay
38%10%12%21%14%1
2310
August1st to 15thDay
45%8%14%17%14%
2327
16th to endDay
40%8%13%24%11%1
2336
September1st to 15thDay
39%7%11%19%19%2
2160
16th to endDay
44%5%7%23%18%1
1952
October1st to 15thDay
40%5%9%26%14%3
1800
16th to endDay
36%48%27%19%2
1920
November1st to 15thDay
37%411%20%20%5%
1826
16th to endDay
41%5%9%24%18%1
1560
December1st to 15thDay
43%6%13%21%12%2
1560
16th to endDay
46%6%11%22%11%1
1664
January1st to 15thNight
41%5%12%18%16%4
2551
16th to endNight
42%5%12%23%15%1
2560
February1st to 15thNight
39%6%12%23%15%2
2287
16th to endNight
41%7%11%23%14%1
1934
March1st to 15thNight
39%5%12%27%11%2
1980
16th to endNight
41%6%12%22%15%1
2112
April1st to 15thNight
41%6%10%22%16%3
1811
16th to endNight
39%6%11%20%16%5%
1770
May1st to 15thNight
44%6%10%22%13%2
1620
16th to endNight
38%7%16%22%13%1
1546
June1st to 15thNight
34%7%12%30%13%1
1440
16th to endNight
34%7%15%24%16%1
1440
July1st to 15thNight
40%9%15%18%12%3
1422
16th to endNight
27%9%20%24%17%1
1595
August1st to 15thNight
35%6%15%25%16%
1609
16th to endNight
33%6%14%28%16%1
1854
September1st to 15thNight
36%5%12%21%20%3
1800
16th to endNight
37%48%25%21%1
2006
October1st to 15thNight
38%411%24%18%2
2160
16th to endNight
31%49%29%22%1
2304
November1st to 15thNight
36%49%21%19%7%
2356
16th to endNight
37%5%10%23%19%3
2730
December1st to 15thNight
45%6%11%22%12%1
2730
16th to endNight
42%7%14%23%12%1
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
25%33%20%14%5%
128
16th to endDay
30%28%30%7%3
109
February1st to 15thDay
25%37%32%31
90
16th to endDay
20%30%32%15%1
165
March1st to 15thDay
23%32%18%19%5%
270
16th to endDay
19%29%24%17%6%2
288
April1st to 15thDay
14%31%20%20%11%1
270
16th to endDay
20%22%22%16%10%6%
270
May1st to 15thDay
24%29%17%12%10%5%
288
16th to endDay
20%20%16%20%16%5%
331
June1st to 15thDay
13%19%23%18%18%6%
315
16th to endDay
11%18%28%25%12%3
315
July1st to 15thDay
13%10%24%29%14%7%
305
16th to endDay
7%11%17%27%23%12%
326
August1st to 15thDay
14%8%16%22%26%11%
313
16th to endDay
12%6%12%25%23%19%
332
September1st to 15thDay
13%13%16%17%25%13%
315
16th to endDay
21%8%15%19%23%11%
314
October1st to 15thDay
22%8%15%25%22%5%
315
16th to endDay
13%22%28%19%12%3
336
November1st to 15thDay
17%19%24%19%15%3
296
16th to endDay
18%22%28%20%8%1
90
December1st to 15thDay
22%31%22%14%8%1
90
16th to endDay
18%27%34%16%3
96
January1st to 15thNight
18%33%23%20%4
780
16th to endNight
17%34%26%19%1
788
February1st to 15thNight
16%35%24%23%1
704
16th to endNight
16%39%25%16%2
631
March1st to 15thNight
18%33%24%19%4
720
16th to endNight
14%33%26%18%41
768
April1st to 15thNight
15%32%26%20%4
718
16th to endNight
15%27%22%23%11%
690
May1st to 15thNight
17%23%20%22%14%
540
16th to endNight
16%20%15%29%17%1
424
June1st to 15thNight
9%19%18%27%21%2
360
16th to endNight
7%18%14%41%16%
360
July1st to 15thNight
11%12%13%33%27%1
402
16th to endNight
5%17%11%29%30%4
564
August1st to 15thNight
10%10%10%40%24%3
539
16th to endNight
9%10%8%34%32%3
708
September1st to 15thNight
11%12%16%25%30%4
720
16th to endNight
15%12%14%23%28%4
717
October1st to 15thNight
18%15%14%26%21%2
720
16th to endNight
14%22%23%26%11%1
768
November1st to 15thNight
13%26%20%25%12%1
760
16th to endNight
15%32%20%22%7%
780
December1st to 15thNight
16%30%22%23%6%
780
16th to endNight
16%34%24%24%1
832
Page generated at 2018-01-21 12:19:23. Version ac04

Copyright 2018 A. Danko


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