Logansport
Clear Sky Chart
History

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

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
37%
24440
17%
74631
11%
24385
43%
24385
21%
51327

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
19%
950
13%
2648
5%
946
26%
946
14%
2042
January11th to 20thNight
16%
905
11%
2533
5%
905
22%
905
13%
2008
January21st to endNight
20%
976
10%
2758
4%
976
25%
976
13%
2140
February1st to 10thNight
19%
720
9%
2174
4%
720
24%
720
13%
1668
February11th to 20thNight
21%
699
14%
2099
5%
699
29%
699
16%
1531
February21st to endNight
16%
592
15%
1776
5%
592
25%
592
15%
1320
March1st to 10thNight
24%
720
14%
2160
8%
720
29%
720
17%
1550
March11th to 20thNight
28%
720
19%
2062
9%
720
37%
720
23%
1393
March21st to endNight
26%
695
15%
2081
7%
695
34%
695
18%
1496
April1st to 10thNight
29%
540
16%
1800
9%
540
39%
540
21%
1175
April11th to 20thNight
32%
533
20%
1775
13%
533
41%
533
20%
1173
April21st to endNight
31%
540
17%
1638
8%
540
40%
540
22%
1123
May1st to 10thNight
34%
540
14%
1620
8%
540
40%
540
20%
1151
May11th to 20thNight
43%
531
16%
1592
11%
531
47%
531
22%
1091
May21st to endNight
53%
583
16%
1616
11%
582
58%
582
28%
1079
June1st to 10thNight
58%
540
17%
1440
11%
540
64%
540
37%
879
June11th to 20thNight
54%
540
19%
1440
14%
540
59%
540
35%
906
June21st to endNight
54%
540
18%
1440
12%
540
59%
540
32%
938
July1st to 10thNight
66%
525
16%
1400
14%
525
68%
525
36%
877
July11th to 20thNight
67%
522
22%
1392
18%
522
70%
522
42%
818
July21st to endNight
67%
591
23%
1504
17%
558
69%
558
38%
907
August1st to 10thNight
72%
537
22%
1600
19%
534
75%
534
37%
930
August11th to 20thNight
68%
534
21%
1674
19%
534
71%
534
33%
976
August21st to endNight
68%
594
22%
1980
22%
594
70%
594
34%
1089
September1st to 10thNight
60%
540
22%
1800
21%
540
64%
540
30%
1052
September11th to 20thNight
68%
715
31%
1975
26%
715
71%
715
42%
1118
September21st to endNight
57%
720
26%
1980
19%
720
62%
720
34%
1228
October1st to 10thNight
52%
720
25%
1980
19%
720
56%
720
33%
1236
October11th to 20thNight
34%
720
21%
2150
12%
720
44%
720
24%
1387
October21st to endNight
28%
792
18%
2574
13%
792
36%
792
19%
1759
November1st to 10thNight
35%
740
22%
2406
16%
740
45%
740
25%
1461
November11th to 20thNight
28%
760
21%
2470
12%
760
40%
760
20%
1633
November21st to endNight
26%
760
17%
2470
11%
760
35%
760
15%
1786
December1st to 10thNight
21%
817
11%
2527
4%
817
28%
817
15%
1883
December11th to 20thNight
23%
950
11%
3233
6%
949
28%
949
13%
2445
December21st to endNight
15%
1039
5%
4864
4%
1026
21%
1026
6%
4079

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
14%9%47%6%35%5%5%7%36%
74834
Night
15%9%46%5%3445%6%37%
74883
TransparencyDay
47%7%12%21%12%2
74538
Night
47%6%11%20%13%2
74700
SeeingDay
18%8%27%24%16%7%
14498
Night
19%8%28%30%13%1
24451

By Month

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 10thDay
18%15%5%10%7%4446%5%22%
1517
11th to 20thDay
17%20%7%9%7%45%43420%
1440
21st to endDay
17%18%6%11%6%35%346%21%
1596
February1st to 10thDay
19%14%5%11%7%35%445%23%
1782
11th to 20thDay
16%12%410%7%4445%7%27%
1748
21st to endDay
18%15%7%8%5%34446%26%
1480
March1st to 10thDay
18%13%5%7%7%34446%29%
1800
11th to 20thDay
16%10%47%6%36%5%6%7%31%
1898
21st to endDay
23%12%5%7%6%24446%26%
2290
April1st to 10thDay
17%10%47%5%3445%7%33%
2160
11th to 20thDay
18%10%36%5%35%45%7%36%
2134
21st to endDay
20%9%35%6%35%5%5%8%32%
2322
May1st to 10thDay
17%8%46%7%45%5%6%8%31%
2340
11th to 20thDay
20%7%36%6%35%5%6%7%33%
2301
21st to endDay
11%6%36%5%45%6%7%9%38%
2658
June1st to 10thDay
11%5%26%6%35%5%6%9%42%
2520
11th to 20thDay
10%5%345%35%6%6%9%45%
2520
21st to endDay
11%5%26%6%36%6%6%9%39%
2520
July1st to 10thDay
9%5%35%5%35%5%6%10%45%
2520
11th to 20thDay
8%425%445%5%6%10%46%
2520
21st to endDay
8%5%25%6%35%6%8%9%43%
2725
August1st to 10thDay
6%425%6%45%5%7%10%47%
2327
11th to 20thDay
8%5%25%5%46%6%7%10%43%
2223
21st to endDay
8%324445%5%6%9%48%
2376
September1st to 10thDay
10%5%26%6%35%46%6%45%
2147
11th to 20thDay
11%425%6%25%5%6%8%47%
1980
21st to endDay
12%5%24435%5%5%7%47%
1980
October1st to 10thDay
13%6%25%5%3445%8%45%
1980
11th to 20thDay
16%7%35%6%346%47%39%
1805
21st to endDay
21%9%37%6%35%5%6%5%31%
1782
November1st to 10thDay
12%6%245%35%446%49%
1672
11th to 20thDay
18%12%46%5%34346%35%
1710
21st to endDay
20%10%47%5%3435%6%33%
1710
December1st to 10thDay
17%14%6%9%8%34337%27%
1650
11th to 20thDay
14%14%6%12%6%45%445%26%
1918
21st to endDay
26%20%8%11%7%3333413%
2783
January1st to 10thNight
18%14%5%9%7%34445%27%
2648
11th to 20thNight
17%17%7%10%6%3433426%
2533
21st to endNight
15%14%7%10%8%34446%25%
2758
February1st to 10thNight
21%14%6%8%6%33345%26%
2174
11th to 20thNight
14%13%5%8%6%36%446%32%
2098
21st to endNight
20%13%49%6%2335%5%30%
1776
March1st to 10thNight
16%11%47%7%345%5%5%34%
2160
11th to 20thNight
15%8%36%5%35%5%5%7%39%
2062
21st to endNight
21%9%46%5%3445%6%33%
2081
April1st to 10thNight
13%8%36%5%35%46%7%40%
1800
11th to 20thNight
18%8%36%5%3446%6%37%
1775
21st to endNight
20%7%25%5%35%45%8%36%
1638
May1st to 10thNight
18%8%37%5%35%45%7%34%
1620
11th to 20thNight
20%5%345%35%5%5%7%38%
1592
21st to endNight
10%5%35%5%36%6%7%9%41%
1615
June1st to 10thNight
9%5%245%3445%8%51%
1440
11th to 20thNight
8%6%35%425%6%6%8%49%
1440
21st to endNight
10%426%5%346%6%9%44%
1440
July1st to 10thNight
7%5%345%345%6%9%49%
1440
11th to 20thNight
8%42443446%8%54%
1440
21st to endNight
7%5%25%5%35%46%9%50%
1593
August1st to 10thNight
6%415%445%5%7%8%51%
1611
11th to 20thNight
7%5%25%4345%6%8%50%
1674
21st to endNight
8%5%244345%5%8%53%
1980
September1st to 10thNight
10%6%35%5%245%5%7%49%
1800
11th to 20thNight
9%323325%45%8%56%
1975
21st to endNight
11%5%2443445%7%51%
1980
October1st to 10thNight
10%5%25%5%34446%51%
1980
11th to 20thNight
18%6%25%5%24446%44%
2150
21st to endNight
20%8%35%5%3445%6%36%
2574
November1st to 10thNight
12%8%25%43345%6%46%
2406
11th to 20thNight
15%9%46%6%3346%7%37%
2470
21st to endNight
19%11%5%7%6%34446%31%
2470
December1st to 10thNight
17%13%5%8%6%34446%29%
2527
11th to 20thNight
17%15%6%9%6%34445%27%
3279
21st to endNight
26%18%7%9%6%44445%15%
4884

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
63%5%9%15%7%
1518
11th to 20thDay
68%6%11%11%4
1440
21st to endDay
66%412%11%6%1
1596
February1st to 10thDay
64%410%13%7%1
1782
11th to 20thDay
57%411%20%6%1
1758
21st to endDay
59%7%11%16%7%1
1480
March1st to 10thDay
57%5%10%20%8%
1800
11th to 20thDay
51%7%12%18%10%1
1898
21st to endDay
59%6%12%19%41
2290
April1st to 10thDay
49%7%12%19%13%
2160
11th to 20thDay
48%6%11%21%11%3
2134
21st to endDay
49%7%12%18%10%3
2322
May1st to 10thDay
50%8%13%20%8%1
2340
11th to 20thDay
50%8%10%19%12%1
2305
21st to endDay
41%9%12%22%14%2
2658
June1st to 10thDay
38%8%12%24%16%3
2520
11th to 20thDay
33%8%12%24%19%3
2520
21st to endDay
39%9%16%18%15%3
2520
July1st to 10thDay
35%8%14%24%15%4
2451
11th to 20thDay
32%7%16%26%17%2
2445
21st to endDay
35%9%14%25%16%3
2574
August1st to 10thDay
31%9%17%29%14%1
2314
11th to 20thDay
34%10%14%24%16%1
2223
21st to endDay
30%9%14%22%19%6%
2376
September1st to 10thDay
37%8%15%21%16%4
2147
11th to 20thDay
34%7%11%27%20%2
1980
21st to endDay
36%5%11%25%21%2
1980
October1st to 10thDay
39%6%11%24%18%2
1980
11th to 20thDay
43%7%10%22%17%1
1805
21st to endDay
53%6%10%20%10%1
1782
November1st to 10thDay
36%6%14%26%17%2
1672
11th to 20thDay
51%5%11%20%12%2
1710
21st to endDay
52%5%12%22%8%1
1710
December1st to 10thDay
61%412%16%7%
1650
11th to 20thDay
60%6%9%22%3
1915
21st to endDay
77%47%8%3
2783
January1st to 10thNight
60%49%16%10%
2648
11th to 20thNight
64%411%14%7%
2533
21st to endNight
62%412%15%7%
2758
February1st to 10thNight
61%412%14%6%1
2174
11th to 20thNight
54%5%11%18%10%1
2099
21st to endNight
57%5%10%18%9%2
1776
March1st to 10thNight
51%6%11%20%10%1
2160
11th to 20thNight
44%7%11%23%12%3
2062
21st to endNight
53%6%11%20%9%1
2081
April1st to 10thNight
43%7%13%22%14%2
1800
11th to 20thNight
46%6%9%21%15%4
1775
21st to endNight
46%7%10%21%13%3
1638
May1st to 10thNight
49%7%12%20%11%1
1620
11th to 20thNight
44%8%11%22%13%2
1593
21st to endNight
37%11%13%21%15%4
1616
June1st to 10thNight
32%6%13%25%21%3
1440
11th to 20thNight
32%8%13%24%20%4
1440
21st to endNight
35%9%15%22%15%4
1440
July1st to 10thNight
32%8%15%24%15%6%
1400
11th to 20thNight
26%7%14%29%21%2
1392
21st to endNight
29%8%16%24%18%6%
1504
August1st to 10thNight
28%8%15%28%20%1
1600
11th to 20thNight
29%9%16%23%21%2
1674
21st to endNight
29%7%13%24%21%6%
1980
September1st to 10thNight
33%7%14%23%17%6%
1800
11th to 20thNight
26%6%11%29%26%2
1975
21st to endNight
33%8%10%24%23%3
1980
October1st to 10thNight
35%6%9%28%21%2
1980
11th to 20thNight
42%5%9%25%17%2
2150
21st to endNight
48%6%9%22%14%2
2574
November1st to 10thNight
38%6%10%24%20%3
2406
11th to 20thNight
46%5%11%21%15%2
2470
21st to endNight
56%49%22%8%
2470
December1st to 10thNight
57%6%12%17%9%1
2527
11th to 20thNight
57%7%11%17%7%1
3281
21st to endNight
72%6%9%9%4
4884

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
26%15%37%14%7%1
270
11th to 20thDay
28%10%37%20%31
240
21st to endDay
28%16%34%18%4
264
February1st to 10thDay
29%15%37%18%1
240
11th to 20thDay
26%17%35%16%5%1
240
21st to endDay
29%15%41%12%3
198
March1st to 10thDay
22%18%40%18%3
240
11th to 20thDay
26%11%36%20%7%1
338
21st to endDay
32%11%31%19%6%1
462
April1st to 10thDay
23%10%33%23%8%2
420
11th to 20thDay
23%11%32%17%13%3
412
21st to endDay
27%13%29%20%7%3
420
May1st to 10thDay
24%12%30%22%10%3
423
11th to 20thDay
21%6%30%23%15%5%
447
21st to endDay
13%5%27%25%18%11%
612
June1st to 10thDay
11%6%27%29%22%5%
630
11th to 20thDay
11%427%31%20%8%
630
21st to endDay
13%5%27%29%19%8%
630
July1st to 10thDay
11%315%27%26%18%
621
11th to 20thDay
8%320%32%22%15%
618
21st to endDay
11%215%32%28%12%
666
August1st to 10thDay
6%212%28%33%19%
446
11th to 20thDay
10%319%28%27%13%
439
21st to endDay
8%215%29%32%14%
495
September1st to 10thDay
11%417%29%29%10%
450
11th to 20thDay
10%314%27%31%15%
450
21st to endDay
13%8%22%25%24%7%
450
October1st to 10thDay
13%6%27%28%18%7%
450
11th to 20thDay
18%18%27%28%9%
353
21st to endDay
30%12%34%21%31
297
November1st to 10thDay
13%12%34%26%11%4
270
11th to 20thDay
27%13%34%16%8%1
270
21st to endDay
29%11%36%20%4
270
December1st to 10thDay
21%17%37%17%8%
270
11th to 20thDay
21%14%36%23%6%
270
21st to endDay
32%14%35%17%3
297
January1st to 10thNight
26%13%33%23%5%
950
11th to 20thNight
23%13%37%22%4
905
21st to endNight
23%11%35%26%4
976
February1st to 10thNight
28%9%34%26%3
720
11th to 20thNight
23%14%35%24%4
703
21st to endNight
27%12%39%19%3
592
March1st to 10thNight
21%13%34%27%6%
720
11th to 20thNight
19%11%36%27%5%1
720
21st to endNight
26%8%35%25%5%
695
April1st to 10thNight
16%9%39%27%7%
540
11th to 20thNight
22%9%33%28%8%1
533
21st to endNight
26%6%32%26%9%1
540
May1st to 10thNight
24%430%32%9%
540
11th to 20thNight
23%425%33%16%1
531
21st to endNight
12%323%41%20%2
584
June1st to 10thNight
11%321%46%19%1
540
11th to 20thNight
11%325%40%20%1
540
21st to endNight
12%222%38%25%1
540
July1st to 10thNight
9%113%41%30%6%
525
11th to 20thNight
9%215%40%29%5%
522
21st to endNight
7%312%43%32%3
591
August1st to 10thNight
6%111%44%33%4
537
11th to 20thNight
8%212%43%30%5%
534
21st to endNight
10%113%33%38%4
594
September1st to 10thNight
12%216%36%29%5%
540
11th to 20thNight
11%314%38%31%4
715
21st to endNight
13%5%18%36%24%3
720
October1st to 10thNight
13%5%23%36%20%3
720
11th to 20thNight
23%10%28%28%11%
720
21st to endNight
27%9%33%24%7%
792
November1st to 10thNight
17%10%33%28%11%1
740
11th to 20thNight
20%14%32%26%7%1
760
21st to endNight
26%10%31%27%7%
760
December1st to 10thNight
24%11%36%24%5%
817
11th to 20thNight
25%11%32%26%6%
950
21st to endNight
33%11%31%22%3
1045
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