Carmangay Village
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Carmangay Village clear sky chart from 2005-11-06 to 2024-01-16.

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%
23550
15%
74678
9%
23511
45%
23511
23%
47956

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
28%
949
13%
2836
7%
946
33%
946
16%
2024
January11th to 20thNight
33%
916
17%
2776
9%
916
41%
916
20%
1924
January21st to endNight
31%
792
20%
2772
12%
792
43%
792
19%
1815
February1st to 10thNight
32%
720
14%
2467
10%
720
39%
720
16%
1715
February11th to 20thNight
34%
701
13%
2273
9%
700
41%
700
15%
1647
February21st to endNight
37%
592
15%
1832
10%
592
44%
592
18%
1292
March1st to 10thNight
33%
720
14%
2152
9%
720
39%
720
20%
1494
March11th to 20thNight
34%
720
19%
1980
9%
720
42%
720
23%
1371
March21st to endNight
34%
792
11%
2178
4%
792
40%
792
20%
1566
April1st to 10thNight
31%
653
16%
1747
5%
653
38%
653
20%
1244
April11th to 20thNight
35%
533
15%
1601
9%
533
40%
533
20%
1117
April21st to endNight
38%
540
13%
1620
10%
540
43%
540
20%
1123
May1st to 10thNight
43%
532
10%
1572
8%
532
47%
532
22%
1083
May11th to 20thNight
49%
354
15%
1239
16%
354
53%
354
25%
752
May21st to endNight
44%
388
7%
1358
6%
388
46%
388
16%
943
June1st to 10thNight
43%
360
5%
1260
2%
360
44%
360
21%
822
June11th to 20thNight
41%
360
4%
1260
1%
360
42%
360
19%
828
June21st to endNight
51%
360
5%
1260
1%
360
52%
360
30%
698
July1st to 10thNight
63%
350
6%
1225
3%
350
64%
350
34%
664
July11th to 20thNight
58%
348
11%
1218
10%
348
62%
348
33%
661
July21st to endNight
64%
394
20%
1362
21%
372
73%
372
45%
608
August1st to 10thNight
63%
390
19%
1456
20%
388
70%
388
33%
748
August11th to 20thNight
64%
534
21%
1602
18%
534
68%
534
41%
870
August21st to endNight
60%
594
27%
1782
20%
594
65%
594
41%
957
September1st to 10thNight
53%
602
21%
1731
13%
602
57%
602
35%
1024
September11th to 20thNight
52%
720
21%
1980
14%
720
57%
720
38%
1181
September21st to endNight
42%
720
23%
1980
13%
720
50%
720
35%
1205
October1st to 10thNight
46%
720
21%
2078
12%
720
54%
720
28%
1326
October11th to 20thNight
38%
720
21%
2240
10%
720
51%
720
28%
1370
October21st to endNight
33%
792
19%
2574
10%
792
44%
792
22%
1655
November1st to 10thNight
25%
848
17%
2513
6%
848
35%
848
19%
1758
November11th to 20thNight
27%
950
20%
2660
9%
950
37%
950
24%
1759
November21st to endNight
31%
950
16%
2835
7%
950
40%
950
25%
1812
December1st to 10thNight
36%
950
16%
2850
10%
950
41%
950
20%
1958
December11th to 20thNight
30%
950
13%
3466
7%
949
37%
949
17%
2251
December21st to endNight
28%
1036
10%
4943
6%
1026
35%
1026
13%
2691

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
9%8%36%6%35%5%6%8%41%
74657
Night
7%8%47%6%35%5%6%8%40%
75157
TransparencyDay
40%8%15%24%12%2
74342
Night
40%8%15%22%13%2
74990
SeeingDay
12%10%26%28%18%6%
14237
Night
11%9%32%31%15%2
23564

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 10thDay
6%9%5%7%8%35%5%7%9%35%
1329
11th to 20thDay
6%7%5%9%7%36%6%6%9%35%
1330
21st to endDay
6%9%410%7%46%6%8%11%30%
1584
February1st to 10thDay
6%12%5%7%9%5%7%6%7%8%28%
1492
11th to 20thDay
7%12%5%9%9%45%6%6%9%29%
1575
21st to endDay
413%6%11%9%45%6%6%7%30%
1422
March1st to 10thDay
5%12%49%8%46%6%6%7%33%
1808
11th to 20thDay
6%10%48%7%445%6%8%38%
1979
21st to endDay
8%12%5%9%7%45%6%6%8%31%
2178
April1st to 10thDay
10%11%5%8%7%46%6%5%7%31%
2211
11th to 20thDay
10%12%47%6%35%6%5%8%33%
2310
21st to endDay
11%9%37%6%45%5%7%8%34%
2340
May1st to 10thDay
12%10%36%7%35%6%6%8%34%
2384
11th to 20thDay
12%6%36%5%35%5%7%9%38%
2654
21st to endDay
19%8%36%6%45%5%6%7%32%
2917
June1st to 10thDay
14%7%35%5%46%6%6%10%34%
2700
11th to 20thDay
17%6%26%7%36%7%6%8%31%
2700
21st to endDay
9%424435%5%7%9%49%
2700
July1st to 10thDay
6%425%4345%6%10%51%
2700
11th to 20thDay
7%3245%345%7%9%52%
2700
21st to endDay
421332445%8%63%
2871
August1st to 10thDay
8%4133345%6%10%53%
2473
11th to 20thDay
7%42443346%10%53%
2299
21st to endDay
9%41433445%8%53%
2574
September1st to 10thDay
11%4244335%46%54%
2226
11th to 20thDay
13%6%3442445%8%48%
1980
21st to endDay
9%6%25%5%3445%7%50%
1980
October1st to 10thDay
12%10%35%6%45%5%5%7%39%
1882
11th to 20thDay
9%8%37%5%35%5%6%8%40%
1717
21st to endDay
8%9%37%6%45%6%7%8%38%
1782
November1st to 10thDay
11%12%47%7%35%5%7%7%33%
1546
11th to 20thDay
7%9%37%6%35%46%9%41%
1520
21st to endDay
5%9%49%6%445%7%9%39%
1340
December1st to 10thDay
5%11%5%9%7%46%45%8%37%
1330
11th to 20thDay
49%5%11%9%5%7%6%6%8%31%
1682
21st to endDay
48%36%6%35%6%7%8%44%
2442
January1st to 10thNight
411%6%9%8%37%6%7%9%30%
2836
11th to 20thNight
6%9%5%9%7%45%5%7%8%36%
2776
21st to endNight
5%10%48%7%46%7%6%9%34%
2772
February1st to 10thNight
7%10%410%8%46%6%6%8%31%
2467
11th to 20thNight
7%12%6%9%8%47%6%6%7%28%
2272
21st to endNight
411%7%9%9%45%6%6%6%33%
1832
March1st to 10thNight
410%5%8%8%45%6%7%10%33%
2152
11th to 20thNight
6%10%5%7%6%35%5%8%10%35%
1980
21st to endNight
6%10%5%8%7%46%6%7%9%32%
2178
April1st to 10thNight
8%10%47%6%45%6%7%8%33%
1747
11th to 20thNight
10%11%48%6%45%6%6%6%33%
1601
21st to endNight
11%9%37%7%36%5%6%8%35%
1620
May1st to 10thNight
10%10%48%6%36%46%8%36%
1572
11th to 20thNight
9%6%26%5%346%6%8%44%
1239
21st to endNight
18%7%36%6%36%6%6%7%32%
1358
June1st to 10thNight
14%7%35%6%345%5%9%38%
1260
11th to 20thNight
17%7%345%46%5%7%9%33%
1260
21st to endNight
6%325%6%345%7%10%48%
1260
July1st to 10thNight
7%3145%36%5%6%8%52%
1260
11th to 20thNight
7%3145%245%6%8%54%
1260
21st to endNight
32224245%5%8%63%
1442
August1st to 10thNight
7%215%435%449%56%
1464
11th to 20thNight
6%3143246%6%10%54%
1602
21st to endNight
7%31443346%7%58%
1782
September1st to 10thNight
9%5%245%3447%9%49%
1731
11th to 20thNight
11%6%24423448%53%
1980
21st to endNight
9%6%24435%5%6%8%48%
1980
October1st to 10thNight
12%7%35%5%3445%8%44%
2078
11th to 20thNight
8%8%25%5%346%6%8%45%
2240
21st to endNight
8%7%46%6%46%5%5%9%39%
2574
November1st to 10thNight
10%11%47%6%36%6%6%8%35%
2513
11th to 20thNight
5%9%36%6%35%7%7%8%41%
2660
21st to endNight
410%47%5%35%46%11%40%
2835
December1st to 10thNight
5%10%48%7%47%5%6%8%36%
2850
11th to 20thNight
38%5%8%8%45%6%7%9%36%
3510
21st to endNight
49%37%5%35%6%6%8%44%
5214

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
44%8%15%23%8%3
1329
11th to 20thDay
44%9%14%22%8%3
1330
21st to endDay
44%9%16%18%11%2
1584
February1st to 10thDay
52%8%12%18%8%2
1492
11th to 20thDay
49%9%16%18%7%1
1584
21st to endDay
52%6%11%17%12%1
1422
March1st to 10thDay
46%9%16%17%11%1
1808
11th to 20thDay
42%8%16%21%11%1
1980
21st to endDay
49%8%15%21%6%
2178
April1st to 10thDay
51%8%13%21%7%1
2211
11th to 20thDay
48%7%13%21%9%2
2310
21st to endDay
46%7%13%22%11%1
2340
May1st to 10thDay
46%8%13%23%10%
2384
11th to 20thDay
41%8%14%25%11%1
2658
21st to endDay
50%7%13%20%9%
2918
June1st to 10thDay
44%8%16%21%9%1
2700
11th to 20thDay
47%10%14%19%9%1
2700
21st to endDay
30%8%18%29%12%3
2700
July1st to 10thDay
27%9%16%31%14%3
2626
11th to 20thDay
26%8%17%28%18%4
2619
21st to endDay
20%7%14%31%24%5%
2711
August1st to 10thDay
26%8%15%32%15%4
2456
11th to 20thDay
26%7%17%33%13%3
2299
21st to endDay
28%6%13%29%20%4
2574
September1st to 10thDay
30%7%13%27%16%8%
2226
11th to 20thDay
35%7%12%28%15%4
1980
21st to endDay
34%6%13%31%13%3
1980
October1st to 10thDay
43%7%14%23%11%1
1882
11th to 20thDay
41%6%17%23%11%2
1717
21st to endDay
40%8%16%23%11%2
1782
November1st to 10thDay
48%8%13%20%9%1
1546
11th to 20thDay
40%6%19%24%9%1
1520
21st to endDay
41%6%19%21%10%2
1340
December1st to 10thDay
46%8%15%18%10%3
1330
11th to 20thDay
48%8%16%22%5%1
1684
21st to endDay
36%8%13%22%20%1
2442
January1st to 10thNight
49%8%14%18%9%3
2836
11th to 20thNight
45%8%15%20%9%2
2776
21st to endNight
43%8%15%19%13%2
2772
February1st to 10thNight
49%8%13%16%12%2
2467
11th to 20thNight
52%8%12%19%9%
2273
21st to endNight
50%6%13%19%10%2
1832
March1st to 10thNight
46%8%16%21%8%1
2152
11th to 20thNight
43%8%15%21%12%1
1980
21st to endNight
46%9%18%19%6%1
2178
April1st to 10thNight
46%9%12%21%11%1
1747
11th to 20thNight
48%7%13%21%9%1
1601
21st to endNight
45%8%12%23%9%2
1620
May1st to 10thNight
45%8%12%24%10%1
1572
11th to 20thNight
36%10%13%28%12%2
1239
21st to endNight
48%9%14%19%8%2
1358
June1st to 10thNight
43%8%14%24%11%1
1260
11th to 20thNight
44%8%15%22%10%1
1260
21st to endNight
29%9%18%26%16%2
1260
July1st to 10thNight
27%8%18%29%15%3
1225
11th to 20thNight
26%10%15%24%20%6%
1218
21st to endNight
18%6%14%29%28%6%
1362
August1st to 10thNight
28%6%15%29%17%5%
1456
11th to 20thNight
25%7%16%30%18%5%
1602
21st to endNight
24%6%12%29%23%6%
1782
September1st to 10thNight
30%7%12%26%18%6%
1731
11th to 20thNight
30%6%13%26%18%6%
1980
21st to endNight
32%6%16%27%15%4
1980
October1st to 10thNight
37%7%14%24%16%2
2078
11th to 20thNight
35%7%15%24%15%3
2240
21st to endNight
40%8%15%24%12%1
2574
November1st to 10thNight
46%9%12%22%10%1
2513
11th to 20thNight
38%9%17%20%15%1
2660
21st to endNight
38%7%20%20%11%3
2835
December1st to 10thNight
45%8%14%19%10%3
2850
11th to 20thNight
42%10%21%20%6%1
3507
21st to endNight
37%7%14%24%14%4
5214

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
5%13%32%28%12%9%
180
11th to 20thDay
10%11%29%27%17%6%
171
21st to endDay
6%14%34%29%14%3
176
February1st to 10thDay
15%15%33%27%7%3
184
11th to 20thDay
10%15%34%27%10%3
240
21st to endDay
13%11%29%28%16%3
288
March1st to 10thDay
11%19%33%23%10%4
420
11th to 20thDay
9%13%30%27%16%5%
420
21st to endDay
11%14%33%24%13%4
462
April1st to 10thDay
15%16%30%27%10%2
420
11th to 20thDay
15%12%25%27%17%4
412
21st to endDay
16%12%27%27%15%3
420
May1st to 10thDay
14%8%24%27%19%8%
463
11th to 20thDay
16%6%23%24%24%6%
625
21st to endDay
18%7%18%29%19%9%
679
June1st to 10thDay
14%10%24%29%18%4
630
11th to 20thDay
17%11%25%29%17%2
630
21st to endDay
10%423%33%23%8%
630
July1st to 10thDay
8%417%35%26%9%
621
11th to 20thDay
6%6%24%33%24%7%
618
21st to endDay
5%421%38%25%8%
617
August1st to 10thDay
9%419%35%25%8%
447
11th to 20thDay
7%5%20%30%26%11%
437
21st to endDay
9%6%25%28%22%10%
495
September1st to 10thDay
11%8%29%26%21%4
450
11th to 20thDay
15%9%24%26%19%7%
450
21st to endDay
16%15%26%26%14%4
450
October1st to 10thDay
16%11%19%24%26%5%
352
11th to 20thDay
11%14%33%21%16%6%
270
21st to endDay
16%19%27%24%13%2
297
November1st to 10thDay
20%15%30%21%10%3
270
11th to 20thDay
12%15%35%29%7%2
270
21st to endDay
5%17%34%23%13%8%
185
December1st to 10thDay
9%15%34%25%12%4
180
11th to 20thDay
11%16%38%20%13%2
180
21st to endDay
9%11%26%31%17%7%
198
January1st to 10thNight
9%17%35%25%12%2
950
11th to 20thNight
9%12%35%31%11%2
916
21st to endNight
10%13%36%28%11%2
792
February1st to 10thNight
11%13%29%28%15%4
720
11th to 20thNight
11%10%32%33%12%2
704
21st to endNight
9%8%29%29%22%2
592
March1st to 10thNight
8%10%37%29%13%2
720
11th to 20thNight
10%11%36%31%11%2
720
21st to endNight
11%10%32%31%13%2
792
April1st to 10thNight
12%9%37%28%13%1
653
11th to 20thNight
15%9%32%32%11%1
533
21st to endNight
15%9%29%35%12%1
540
May1st to 10thNight
12%8%27%33%19%1
532
11th to 20thNight
12%6%26%32%22%2
354
21st to endNight
17%8%22%30%22%1
389
June1st to 10thNight
16%6%28%33%16%1
360
11th to 20thNight
20%6%28%32%13%
360
21st to endNight
8%430%36%22%1
360
July1st to 10thNight
9%318%43%26%1
350
11th to 20thNight
8%324%42%21%1
348
21st to endNight
4324%44%23%2
394
August1st to 10thNight
8%220%41%27%2
390
11th to 20thNight
7%320%46%22%2
534
21st to endNight
8%424%43%20%2
594
September1st to 10thNight
12%426%37%21%1
602
11th to 20thNight
14%324%33%23%2
720
21st to endNight
11%7%33%32%13%4
720
October1st to 10thNight
14%7%26%33%18%2
720
11th to 20thNight
13%7%35%29%14%2
720
21st to endNight
12%11%35%29%12%1
792
November1st to 10thNight
16%12%41%22%9%1
848
11th to 20thNight
11%16%42%24%7%2
950
21st to endNight
9%13%38%27%10%2
950
December1st to 10thNight
11%10%32%30%14%2
950
11th to 20thNight
9%11%37%32%9%2
950
21st to endNight
13%12%33%29%11%2
1045
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