Carmangay Village
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Carmangay Village clear sky chart from 2005-11-05 to 2017-10-06.

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
39%
15322
14%
47003
9%
15294
45%
15294
23%
31210

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
30%
898
12%
2685
7%
895
35%
895
16%
1959
January16th to endNight
34%
819
17%
2739
13%
819
42%
819
19%
1836
February1st to 15thNight
37%
698
13%
2373
10%
697
43%
697
17%
1655
February16th to endNight
38%
632
12%
1991
10%
632
43%
632
16%
1449
March1st to 15thNight
31%
720
13%
2094
7%
720
37%
720
20%
1469
March16th to endNight
31%
768
11%
2112
3%
768
37%
768
18%
1571
April1st to 15thNight
32%
614
13%
1703
5%
614
37%
614
19%
1244
April16th to endNight
39%
540
14%
1620
11%
540
43%
540
20%
1139
May1st to 15thNight
45%
473
12%
1466
11%
473
49%
473
24%
960
May16th to endNight
43%
374
7%
1309
6%
374
46%
374
16%
925
June1st to 15thNight
41%
360
3%
1260
1%
360
42%
360
20%
825
June16th to endNight
49%
360
4%
1260
1%
360
50%
360
26%
749
July1st to 15thNight
60%
340
5%
1190
3%
340
62%
340
34%
644
July16th to endNight
60%
376
14%
1278
14%
354
67%
354
37%
634
August1st to 15thNight
65%
443
15%
1515
16%
441
70%
441
34%
820
August16th to endNight
62%
573
26%
1719
21%
573
66%
573
43%
903
September1st to 15thNight
54%
642
21%
1815
14%
642
58%
642
38%
1066
September16th to endNight
49%
716
23%
1980
14%
716
56%
716
39%
1172
October1st to 15thNight
39%
684
18%
1998
8%
684
48%
684
24%
1347
October16th to endNight
41%
704
20%
2282
12%
704
51%
704
26%
1419
November1st to 15thNight
28%
828
19%
2403
10%
828
37%
828
22%
1612
November16th to endNight
30%
900
15%
2631
7%
900
38%
900
24%
1765
December1st to 15thNight
35%
900
12%
2700
8%
900
38%
900
17%
1973
December16th to endNight
31%
960
14%
2880
7%
960
37%
960
17%
2074

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%7%36%5%35%5%6%8%38%
48229
Night
8%8%36%5%35%5%5%8%38%
47153
Cloud CoverDay
9%7%36%5%35%5%6%8%38%
48230
Night
7%8%36%6%35%5%6%8%38%
47156
TransparencyDay
41%8%15%23%10%1
47883
Night
42%8%14%21%11%1
47003
SeeingDay
13%8%26%28%18%5%
6084
Night
11%7%31%31%15%2
15332

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 15thDay
9%10%5%7%7%34446%36%
1253
16th to endDay
5%9%49%6%45%5%7%10%30%
1497
February1st to 15thDay
8%10%5%6%7%46%5%5%7%30%
1489
16th to endDay
5%14%5%10%7%346%6%8%26%
1482
March1st to 15thDay
5%11%47%7%45%5%5%8%35%
1866
16th to endDay
9%12%48%7%445%5%7%29%
2111
April1st to 15thDay
12%11%5%6%6%346%5%7%30%
2244
16th to endDay
13%9%36%5%35%5%6%7%31%
2340
May1st to 15thDay
12%7%25%5%3445%8%38%
2482
16th to endDay
20%7%26%5%35%5%6%7%29%
2802
June1st to 15thDay
16%7%25%5%35%5%5%9%32%
2700
16th to endDay
12%424435%5%7%8%40%
2700
July1st to 15thDay
7%3144245%7%9%49%
2700
16th to endDay
5%2133235%5%8%56%
2801
August1st to 15thDay
8%3134245%6%10%48%
2436
16th to endDay
9%31332345%9%53%
2483
September1st to 15thDay
12%413213445%53%
2142
16th to endDay
10%423324348%51%
1980
October1st to 15thDay
14%10%26%5%3445%6%35%
1759
16th to endDay
7%8%26%5%45%6%6%7%37%
1588
November1st to 15thDay
10%8%26%6%345%8%7%34%
1444
16th to endDay
6%10%48%42446%9%37%
1326
December1st to 15thDay
6%11%5%11%8%47%35%8%26%
1260
16th to endDay
5%11%5%8%6%47%6%6%8%28%
1344
January1st to 15thNight
6%11%5%9%6%36%5%7%8%29%
2685
16th to endNight
6%10%47%6%35%5%6%7%35%
2739
February1st to 15thNight
9%9%48%6%36%5%5%7%33%
2362
16th to endNight
5%11%6%10%8%45%5%5%6%29%
1991
March1st to 15thNight
49%5%7%7%35%5%8%10%32%
2094
16th to endNight
8%11%5%7%6%36%5%6%8%29%
2109
April1st to 15thNight
11%9%38%5%35%6%6%7%32%
1703
16th to endNight
12%9%37%6%35%45%7%34%
1620
May1st to 15thNight
9%8%37%5%25%447%41%
1465
16th to endNight
19%5%26%5%26%5%6%7%32%
1309
June1st to 15thNight
14%6%345%345%5%8%37%
1260
16th to endNight
9%4245%35%46%10%42%
1260
July1st to 15thNight
6%3145%2445%7%54%
1260
16th to endNight
41124246%6%8%57%
1365
August1st to 15thNight
6%214435%45%9%52%
1523
16th to endNight
5%3432345%7%59%
1719
September1st to 15thNight
11%413322347%54%
1815
16th to endNight
9%5%2332445%8%50%
1980
October1st to 15thNight
12%8%25%5%345%5%8%38%
1998
16th to endNight
8%6%35%5%35%5%5%8%43%
2282
November1st to 15thNight
6%8%36%6%36%6%5%7%40%
2403
16th to endNight
6%11%37%5%2446%9%38%
2631
December1st to 15thNight
5%10%5%8%7%47%5%6%7%31%
2700
16th to endNight
6%12%5%9%6%446%6%7%29%
2880

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
9%10%48%6%245%47%35%
1253
16th to endDay
5%9%49%7%36%5%7%11%29%
1497
February1st to 15thDay
8%10%5%6%6%46%6%5%7%30%
1489
16th to endDay
415%6%9%7%46%5%5%8%26%
1482
March1st to 15thDay
5%12%38%6%45%5%5%8%34%
1866
16th to endDay
9%13%5%7%7%35%5%5%7%28%
2112
April1st to 15thDay
12%10%5%6%7%35%6%5%8%29%
2244
16th to endDay
12%9%37%5%35%5%6%7%31%
2340
May1st to 15thDay
12%8%25%6%245%5%8%38%
2482
16th to endDay
19%7%36%5%35%5%6%7%28%
2802
June1st to 15thDay
15%6%36%5%46%5%5%9%31%
2700
16th to endDay
11%5%245%35%5%7%9%39%
2700
July1st to 15thDay
6%324425%47%10%48%
2700
16th to endDay
5%3134245%5%9%56%
2801
August1st to 15thDay
8%313425%5%6%9%48%
2436
16th to endDay
8%31332445%8%53%
2483
September1st to 15thDay
12%5%23323446%52%
2142
16th to endDay
10%424423447%51%
1980
October1st to 15thDay
13%9%27%5%3446%6%35%
1759
16th to endDay
7%7%46%5%45%6%6%7%37%
1588
November1st to 15thDay
9%9%37%6%345%8%8%33%
1444
16th to endDay
5%11%49%42347%9%37%
1326
December1st to 15thDay
5%11%6%10%8%5%7%45%7%26%
1260
16th to endDay
5%11%49%8%37%7%6%8%27%
1344
January1st to 15thNight
6%10%5%8%7%36%5%6%8%28%
2685
16th to endNight
6%11%47%6%35%6%6%7%35%
2739
February1st to 15thNight
8%9%48%6%36%5%6%7%32%
2362
16th to endNight
412%6%9%7%5%5%6%46%29%
1991
March1st to 15thNight
49%5%8%6%36%6%7%10%31%
2094
16th to endNight
8%11%5%8%6%45%5%6%9%28%
2112
April1st to 15thNight
11%9%37%7%45%5%5%8%31%
1703
16th to endNight
11%9%46%6%35%5%6%7%34%
1620
May1st to 15thNight
8%9%46%5%34447%40%
1465
16th to endNight
18%5%26%5%26%5%6%8%30%
1309
June1st to 15thNight
14%7%36%425%5%5%8%36%
1260
16th to endNight
10%4145%35%5%7%9%42%
1260
July1st to 15thNight
6%3145%2445%8%52%
1260
16th to endNight
31124345%7%7%56%
1365
August1st to 15thNight
5%224436%36%8%52%
1523
16th to endNight
5%32322245%8%59%
1719
September1st to 15thNight
11%414323346%53%
1815
16th to endNight
8%5%14325%45%8%50%
1980
October1st to 15thNight
12%8%36%6%2445%8%38%
1998
16th to endNight
7%6%26%435%5%5%8%43%
2282
November1st to 15thNight
5%8%36%6%35%6%5%7%40%
2403
16th to endNight
6%10%46%5%245%6%9%37%
2631
December1st to 15thNight
5%10%5%8%7%46%6%6%7%31%
2700
16th to endNight
6%12%6%8%6%45%6%6%7%28%
2880

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
47%8%14%22%42
1253
16th to endDay
45%9%15%18%8%3
1497
February1st to 15thDay
50%9%14%17%7%1
1489
16th to endDay
52%8%15%17%6%
1482
March1st to 15thDay
46%9%18%17%8%
1866
16th to endDay
52%8%13%19%6%
2112
April1st to 15thDay
51%8%13%18%7%1
2244
16th to endDay
48%8%12%20%8%1
2340
May1st to 15thDay
42%7%13%24%12%
2482
16th to endDay
52%8%13%18%7%
2807
June1st to 15thDay
46%9%15%19%8%1
2700
16th to endDay
38%8%16%25%9%1
2700
July1st to 15thDay
28%9%16%31%12%1
2541
16th to endDay
23%8%17%27%18%3
2625
August1st to 15thDay
29%9%18%32%9%1
2419
16th to endDay
27%5%13%32%18%2
2483
September1st to 15thDay
31%7%12%24%17%7%
2142
16th to endDay
32%5%11%31%14%3
1980
October1st to 15thDay
46%6%15%19%9%1
1759
16th to endDay
41%9%15%23%8%1
1588
November1st to 15thDay
44%9%15%21%8%
1444
16th to endDay
42%6%18%22%8%1
1326
December1st to 15thDay
55%7%13%18%5%
1260
16th to endDay
49%8%14%18%8%
1344
January1st to 15thNight
51%7%15%17%6%1
2685
16th to endNight
44%8%14%19%10%2
2739
February1st to 15thNight
48%7%12%18%10%1
2373
16th to endNight
53%6%12%18%8%
1991
March1st to 15thNight
44%9%18%20%6%
2094
16th to endNight
50%8%15%19%6%
2112
April1st to 15thNight
48%9%11%19%10%
1703
16th to endNight
46%7%12%23%8%1
1620
May1st to 15thNight
41%7%11%26%12%1
1466
16th to endNight
48%10%14%18%7%1
1309
June1st to 15thNight
43%8%14%22%10%
1260
16th to endNight
35%7%17%24%13%1
1260
July1st to 15thNight
27%7%16%30%14%2
1190
16th to endNight
21%9%15%28%19%5%
1278
August1st to 15thNight
28%6%18%27%15%2
1515
16th to endNight
23%6%11%30%23%5%
1719
September1st to 15thNight
30%5%10%25%20%7%
1815
16th to endNight
29%6%15%27%16%4
1980
October1st to 15thNight
42%7%15%20%12%1
1998
16th to endNight
36%8%16%25%12%
2282
November1st to 15thNight
40%9%14%21%13%
2403
16th to endNight
42%6%20%16%10%2
2631
December1st to 15thNight
49%10%15%18%6%
2700
16th to endNight
50%7%15%20%5%
2880

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
13%21%21%21%21%
60
16th to endDay
6%9%35%21%17%9%
64
February1st to 15thDay
13%17%22%31%13%2
76
16th to endDay
19%7%33%28%11%
141
March1st to 15thDay
9%17%48%19%5%
270
16th to endDay
13%15%37%23%8%1
288
April1st to 15thDay
15%17%30%25%9%1
269
16th to endDay
21%8%24%28%12%2
270
May1st to 15thDay
14%6%27%28%18%4
375
16th to endDay
21%6%19%24%21%6%
517
June1st to 15thDay
14%9%22%29%20%2
495
16th to endDay
12%426%32%18%4
495
July1st to 15thDay
8%418%34%26%8%
475
16th to endDay
5%330%32%21%5%
470
August1st to 15thDay
8%418%32%26%9%
315
16th to endDay
10%7%22%30%20%9%
332
September1st to 15thDay
16%10%20%25%21%5%
315
16th to endDay
11%13%24%25%17%8%
315
October1st to 15thDay
19%10%23%26%16%3
161
16th to endDay
9%9%18%37%18%6%
96
November1st to 15thDay
16%16%37%17%7%3
90
16th to endDay
5%7%33%32%8%12%
71
December1st to 15thDay
5%6%46%21%18%1
60
16th to endDay
9%6%34%15%29%4
64
January1st to 15thNight
11%13%34%27%11%2
900
16th to endNight
10%11%33%29%12%1
819
February1st to 15thNight
12%9%27%28%16%4
704
16th to endNight
9%6%30%31%18%2
632
March1st to 15thNight
8%8%41%29%10%1
720
16th to endNight
14%9%34%31%10%
768
April1st to 15thNight
14%8%36%28%10%
614
16th to endNight
16%7%28%33%12%
540
May1st to 15thNight
11%6%28%32%18%1
474
16th to endNight
19%6%24%25%22%1
375
June1st to 15thNight
17%330%30%17%1
360
16th to endNight
11%328%34%20%
360
July1st to 15thNight
10%119%41%25%1
340
16th to endNight
3226%42%22%1
376
August1st to 15thNight
6%217%40%29%2
443
16th to endNight
6%223%41%23%1
573
September1st to 15thNight
14%223%30%26%2
642
16th to endNight
11%429%33%17%4
716
October1st to 15thNight
16%6%28%28%16%3
684
16th to endNight
11%6%33%32%13%1
704
November1st to 15thNight
10%13%43%23%7%2
828
16th to endNight
10%9%41%27%8%1
900
December1st to 15thNight
11%8%31%33%13%2
900
16th to endNight
11%9%33%31%10%3
960
Page generated at 2017-10-07 12:07:43. Version ac04

Copyright 2017 A. Danko


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