Indian Lodge
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Indian Lodge clear sky chart from 2005-11-06 to 2024-01-13.

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
61%
23714
32%
74445
23%
23666
70%
23666
44%
37184

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
47%
756
38%
2268
20%
756
64%
756
43%
1155
January11th to 20thNight
49%
732
36%
2196
21%
732
62%
732
45%
1101
January21st to endNight
48%
792
40%
2376
22%
792
66%
792
45%
1191
February1st to 10thNight
50%
720
39%
2160
21%
720
67%
720
49%
1030
February11th to 20thNight
46%
703
29%
2098
15%
700
59%
700
43%
1084
February21st to endNight
38%
592
37%
1776
17%
592
56%
592
46%
857
March1st to 10thNight
47%
720
33%
2160
17%
720
61%
720
44%
1083
March11th to 20thNight
46%
720
31%
2040
16%
720
57%
720
40%
1117
March21st to endNight
45%
615
42%
2001
24%
615
65%
615
49%
904
April1st to 10thNight
48%
540
38%
1800
24%
540
67%
540
43%
865
April11th to 20thNight
45%
533
33%
1777
21%
533
64%
533
43%
836
April21st to endNight
49%
540
39%
1800
27%
540
71%
540
54%
763
May1st to 10thNight
53%
540
32%
1800
25%
540
69%
540
49%
819
May11th to 20thNight
59%
531
27%
1770
28%
531
67%
531
40%
906
May21st to endNight
64%
582
27%
1775
24%
582
73%
582
43%
928
June1st to 10thNight
75%
540
25%
1620
24%
540
79%
540
49%
812
June11th to 20thNight
73%
540
29%
1620
28%
540
78%
540
47%
834
June21st to endNight
79%
540
27%
1620
29%
540
81%
540
44%
866
July1st to 10thNight
77%
525
18%
1732
20%
525
78%
525
37%
952
July11th to 20thNight
86%
522
26%
1740
31%
522
86%
522
45%
867
July21st to endNight
86%
591
24%
1859
28%
558
86%
558
41%
952
August1st to 10thNight
87%
537
26%
1779
32%
534
88%
534
48%
852
August11th to 20thNight
84%
534
24%
1778
29%
534
84%
534
36%
970
August21st to endNight
81%
594
20%
1980
24%
594
81%
594
31%
1147
September1st to 10thNight
77%
540
23%
1800
26%
540
78%
540
34%
995
September11th to 20thNight
77%
540
25%
1903
28%
540
77%
540
31%
1095
September21st to endNight
78%
540
28%
1980
30%
540
80%
540
36%
1029
October1st to 10thNight
75%
540
31%
1980
32%
540
77%
540
41%
949
October11th to 20thNight
68%
660
35%
2100
27%
660
73%
660
44%
1052
October21st to endNight
66%
792
40%
2376
27%
792
74%
792
56%
1105
November1st to 10thNight
67%
778
39%
2258
25%
778
72%
778
57%
1061
November11th to 20thNight
63%
950
36%
2470
19%
950
69%
950
56%
1265
November21st to endNight
54%
950
38%
2470
19%
950
65%
950
49%
1317
December1st to 10thNight
55%
950
37%
2470
20%
950
63%
950
48%
1365
December11th to 20thNight
47%
949
37%
2892
17%
949
60%
949
42%
1508
December21st to endNight
48%
986
28%
4221
20%
977
62%
977
43%
1552

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
43234345%6%7%58%
74713
Night
431342445%8%61%
75056
TransparencyDay
23%6%9%18%25%20%
74463
Night
21%5%9%18%25%21%
74828
SeeingDay
6%9%23%30%24%9%
13490
Night
5%6%22%39%25%3
23732

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 10thDay
5%42332335%7%64%
1897
11th to 20thDay
4413323447%66%
1825
21st to endDay
3423323446%65%
1980
February1st to 10thDay
3312325%5%6%6%65%
1800
11th to 20thDay
3323323446%64%
1749
21st to endDay
231232345%8%69%
1480
March1st to 10thDay
3324435%5%7%9%56%
1800
11th to 20thDay
45%2442445%6%59%
1915
21st to endDay
231432345%7%67%
2353
April1st to 10thDay
331332446%8%65%
2160
11th to 20thDay
241232445%6%68%
2131
21st to endDay
3223313246%71%
2160
May1st to 10thDay
331232345%6%68%
2160
11th to 20thDay
442333445%7%60%
2125
21st to endDay
42123245%6%9%62%
2497
June1st to 10thDay
21133346%7%9%62%
2340
11th to 20thDay
2212435%7%6%9%58%
2340
21st to endDay
5%3235%35%6%7%9%51%
2340
July1st to 10thDay
7%425%6%5%8%8%8%9%37%
2171
11th to 20thDay
5%4145%46%8%7%10%47%
2160
21st to endDay
4426%6%47%8%8%10%41%
2349
August1st to 10thDay
43145%37%8%8%11%45%
2149
11th to 20thDay
7%5%36%7%5%7%8%9%10%32%
2123
21st to endDay
8%426%6%47%6%7%9%41%
2376
September1st to 10thDay
10%425%6%37%6%7%7%43%
2160
11th to 20thDay
11%5%246%5%5%6%7%8%40%
2054
21st to endDay
8%5%245%3346%8%52%
1980
October1st to 10thDay
5%3234245%5%7%61%
1980
11th to 20thDay
6%214324445%63%
1854
21st to endDay
431331213474%
1980
November1st to 10thDay
4312213336%71%
1798
11th to 20thDay
2313423446%68%
1710
21st to endDay
6%423422346%66%
1710
December1st to 10thDay
6%42432435%6%61%
1710
11th to 20thDay
1313335%5%5%7%62%
2161
21st to endDay
331222235%6%71%
3236
January1st to 10thNight
4324424346%63%
2268
11th to 20thNight
5%423323347%63%
2196
21st to endNight
4323424447%63%
2376
February1st to 10thNight
3413323448%65%
2160
11th to 20thNight
4414335%45%8%60%
2098
21st to endNight
331232445%7%66%
1776
March1st to 10thNight
43134235%6%9%59%
2160
11th to 20thNight
5%425%425%446%60%
2040
21st to endNight
321332345%6%68%
2001
April1st to 10thNight
5%324424446%64%
1800
11th to 20thNight
4313323447%64%
1777
21st to endNight
2212323336%73%
1800
May1st to 10thNight
3213413446%67%
1800
11th to 20thNight
6%42332446%7%59%
1770
21st to endNight
4313435%5%7%8%58%
1775
June1st to 10thNight
2213425%6%7%10%59%
1620
11th to 20thNight
42144446%10%9%53%
1620
21st to endNight
4213435%5%7%9%54%
1620
July1st to 10thNight
44245%35%5%9%11%49%
1782
11th to 20thNight
3213425%6%6%11%57%
1800
21st to endNight
2323435%6%8%12%53%
1969
August1st to 10thNight
32134345%8%14%54%
1790
11th to 20thNight
33145%45%5%8%15%46%
1778
21st to endNight
44245%45%7%8%10%48%
1980
September1st to 10thNight
7%424435%6%6%8%52%
1800
11th to 20thNight
7%5%24445%6%7%11%46%
1903
21st to endNight
6%424435%5%6%8%54%
1980
October1st to 10thNight
5%2244235%6%7%60%
1980
11th to 20thNight
7%31332345%6%62%
2100
21st to endNight
4312312335%72%
2376
November1st to 10thNight
5%312213235%72%
2258
11th to 20thNight
25%13313445%69%
2470
21st to endNight
431343335%6%65%
2470
December1st to 10thNight
7%32333445%7%61%
2470
11th to 20thNight
2424424347%61%
3036
21st to endNight
3312223335%73%
4457

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
21%35%17%30%24%
1898
11th to 20thDay
20%35%15%34%23%
1825
21st to endDay
21%36%13%33%24%
1980
February1st to 10thDay
18%5%7%15%25%31%
1800
11th to 20thDay
22%46%14%26%28%
1759
21st to endDay
15%35%14%30%34%
1480
March1st to 10thDay
23%5%6%17%26%23%
1800
11th to 20thDay
24%5%6%13%22%30%
1915
21st to endDay
17%36%11%31%32%
2353
April1st to 10thDay
18%36%13%29%31%
2160
11th to 20thDay
16%6%6%10%29%33%
2134
21st to endDay
15%35%11%34%32%
2160
May1st to 10thDay
17%45%11%27%36%
2160
11th to 20thDay
22%6%7%17%25%23%
2128
21st to endDay
16%7%10%20%21%27%
2497
June1st to 10thDay
16%7%13%21%26%17%
2340
11th to 20thDay
19%6%9%18%26%21%
2340
21st to endDay
26%7%12%21%20%14%
2340
July1st to 10thDay
37%11%16%20%13%3
2112
11th to 20thDay
27%10%14%25%20%4
2097
21st to endDay
30%11%18%27%12%1
2219
August1st to 10thDay
25%11%15%30%16%2
2136
11th to 20thDay
40%12%16%20%10%2
2123
21st to endDay
36%10%17%18%14%5%
2376
September1st to 10thDay
37%9%13%17%15%9%
2160
11th to 20thDay
36%10%13%17%17%7%
2054
21st to endDay
29%6%9%21%23%11%
1980
October1st to 10thDay
20%7%10%23%21%19%
1980
11th to 20thDay
22%5%8%17%24%24%
1854
21st to endDay
16%2316%34%29%
1980
November1st to 10thDay
15%37%18%30%26%
1798
11th to 20thDay
18%46%21%28%22%
1710
21st to endDay
21%36%18%29%22%
1710
December1st to 10thDay
24%36%20%29%18%
1710
11th to 20thDay
20%47%18%30%21%
2159
21st to endDay
14%3415%32%32%
3236
January1st to 10thNight
23%3413%31%25%
2268
11th to 20thNight
22%35%15%31%23%
2196
21st to endNight
21%45%14%34%22%
2376
February1st to 10thNight
18%36%14%26%32%
2160
11th to 20thNight
23%48%12%24%29%
2098
21st to endNight
19%35%9%27%37%
1776
March1st to 10thNight
22%36%17%27%25%
2160
11th to 20thNight
26%45%12%24%29%
2040
21st to endNight
18%35%13%28%32%
2001
April1st to 10thNight
22%45%13%28%29%
1800
11th to 20thNight
20%5%8%12%24%32%
1777
21st to endNight
14%47%15%28%34%
1800
May1st to 10thNight
17%5%6%13%25%34%
1800
11th to 20thNight
24%6%7%18%22%22%
1771
21st to endNight
21%7%13%20%18%21%
1776
June1st to 10thNight
17%8%14%27%22%12%
1620
11th to 20thNight
21%6%12%21%25%16%
1620
21st to endNight
22%7%14%22%21%13%
1620
July1st to 10thNight
24%10%21%29%13%3
1732
11th to 20thNight
19%8%16%29%24%4
1740
21st to endNight
20%10%21%35%14%1
1859
August1st to 10thNight
17%8%20%34%19%2
1779
11th to 20thNight
26%9%23%29%11%2
1778
21st to endNight
28%11%17%22%16%5%
1980
September1st to 10thNight
27%9%17%23%16%9%
1800
11th to 20thNight
30%10%18%19%16%7%
1903
21st to endNight
26%7%14%21%21%11%
1980
October1st to 10thNight
21%7%14%21%18%18%
1980
11th to 20thNight
23%5%8%18%23%24%
2100
21st to endNight
16%35%13%31%32%
2376
November1st to 10thNight
16%36%16%34%25%
2258
11th to 20thNight
17%46%20%28%25%
2470
21st to endNight
21%46%16%31%23%
2470
December1st to 10thNight
23%47%20%26%20%
2470
11th to 20thNight
23%45%18%27%24%
3037
21st to endNight
15%3416%36%26%
4457

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
8%20%33%28%11%1
270
11th to 20thDay
9%17%32%27%13%1
248
21st to endDay
5%22%34%27%9%3
264
February1st to 10thDay
6%12%35%28%18%2
240
11th to 20thDay
10%18%40%20%11%
240
21st to endDay
8%19%46%22%5%1
198
March1st to 10thDay
8%14%45%21%11%1
240
11th to 20thDay
10%18%40%21%8%3
355
21st to endDay
6%20%45%22%6%
462
April1st to 10thDay
5%16%45%24%8%1
420
11th to 20thDay
5%20%45%24%6%1
412
21st to endDay
5%18%41%30%6%1
420
May1st to 10thDay
413%42%27%12%2
423
11th to 20thDay
6%7%33%40%11%3
448
21st to endDay
4433%40%17%2
645
June1st to 10thDay
3215%42%33%5%
630
11th to 20thDay
2212%43%36%6%
630
21st to endDay
5%38%31%40%12%
630
July1st to 10thDay
6%2326%39%23%
457
11th to 20thDay
5%1225%44%24%
444
21st to endDay
31329%42%21%
487
August1st to 10thDay
42120%47%26%
447
11th to 20thDay
6%3325%41%22%
437
21st to endDay
9%2221%42%23%
495
September1st to 10thDay
9%25%34%35%15%
450
11th to 20thDay
9%35%32%33%18%
344
21st to endDay
7%29%33%32%16%
270
October1st to 10thDay
9%313%33%31%10%
270
11th to 20thDay
7%6%21%37%22%7%
270
21st to endDay
7%11%27%27%18%10%
297
November1st to 10thDay
8%8%26%32%20%6%
270
11th to 20thDay
411%26%34%17%8%
270
21st to endDay
10%19%30%24%12%4
270
December1st to 10thDay
11%11%27%34%15%2
270
11th to 20thDay
6%18%39%26%11%1
270
21st to endDay
5%20%36%27%11%1
297
January1st to 10thNight
6%8%33%38%13%1
760
11th to 20thNight
7%8%32%36%16%2
732
21st to endNight
5%11%32%39%13%1
792
February1st to 10thNight
6%11%29%36%17%2
720
11th to 20thNight
7%7%36%38%12%1
704
21st to endNight
5%12%42%35%6%
592
March1st to 10thNight
5%10%33%38%13%1
720
11th to 20thNight
6%12%29%35%16%2
720
21st to endNight
49%39%39%9%1
615
April1st to 10thNight
5%8%33%41%12%1
540
11th to 20thNight
6%10%35%41%8%
533
21st to endNight
28%36%43%10%1
540
May1st to 10thNight
46%33%42%15%1
540
11th to 20thNight
6%5%25%49%14%1
531
21st to endNight
4324%50%18%
584
June1st to 10thNight
2214%54%27%1
540
11th to 20thNight
3113%52%28%2
540
21st to endNight
5%27%47%38%2
540
July1st to 10thNight
5%15%31%54%3
525
11th to 20thNight
3235%53%6%
522
21st to endNight
2332%58%5%
591
August1st to 10thNight
31123%65%7%
537
11th to 20thNight
41122%62%10%
534
21st to endNight
5%1128%59%6%
594
September1st to 10thNight
8%2326%56%6%
540
11th to 20thNight
9%1433%49%4
540
21st to endNight
7%17%37%42%6%
540
October1st to 10thNight
6%110%46%34%4
540
11th to 20thNight
9%216%43%26%3
660
21st to endNight
5%5%19%39%26%7%
792
November1st to 10thNight
7%219%40%26%6%
778
11th to 20thNight
5%5%23%43%23%2
950
21st to endNight
7%9%25%38%17%4
950
December1st to 10thNight
8%6%27%40%17%3
950
11th to 20thNight
5%9%33%40%12%2
950
21st to endNight
413%31%38%12%2
996
Page generated at 2024-01-10 18:35:20. Version ac07

Copyright 2024 Attilla Danko


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