Town Creek Indian Mound
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Town Creek Indian Mound 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
44%
24432
21%
74397
13%
24384
53%
24384
26%
46937

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
26%
758
22%
2459
9%
757
43%
757
22%
1498
January11th to 20thNight
30%
744
24%
2417
12%
744
45%
744
21%
1532
January21st to endNight
29%
792
28%
2574
14%
792
47%
792
25%
1532
February1st to 10thNight
30%
720
19%
2340
10%
720
41%
720
24%
1462
February11th to 20thNight
17%
700
21%
2189
7%
699
34%
699
21%
1389
February21st to endNight
26%
592
27%
1668
11%
592
42%
592
25%
1060
March1st to 10thNight
30%
720
25%
1980
13%
720
41%
720
30%
1226
March11th to 20thNight
28%
720
21%
1980
9%
720
39%
720
24%
1300
March21st to endNight
28%
792
19%
2178
8%
792
37%
792
23%
1466
April1st to 10thNight
32%
720
24%
1929
11%
720
42%
720
31%
1181
April11th to 20thNight
36%
711
24%
1775
9%
711
45%
711
32%
1130
April21st to endNight
42%
691
23%
1771
11%
691
48%
691
34%
1117
May1st to 10thNight
42%
540
19%
1620
9%
540
49%
540
29%
996
May11th to 20thNight
48%
531
16%
1592
8%
531
53%
531
24%
1062
May21st to endNight
63%
582
16%
1744
13%
582
64%
582
26%
1129
June1st to 10thNight
55%
540
14%
1620
11%
540
57%
540
24%
1092
June11th to 20thNight
57%
540
13%
1620
9%
540
59%
540
24%
1101
June21st to endNight
64%
540
15%
1620
12%
540
66%
540
25%
1088
July1st to 10thNight
64%
525
11%
1575
10%
525
64%
525
22%
1090
July11th to 20thNight
69%
522
11%
1566
10%
522
70%
522
25%
1067
July21st to endNight
68%
591
14%
1672
11%
558
69%
558
25%
1141
August1st to 10thNight
65%
537
13%
1600
12%
534
65%
534
23%
1121
August11th to 20thNight
65%
535
15%
1599
12%
535
66%
535
22%
1131
August21st to endNight
64%
792
14%
1980
10%
792
65%
792
27%
1403
September1st to 10thNight
69%
720
23%
1848
17%
720
70%
720
33%
1206
September11th to 20thNight
58%
720
22%
1980
18%
720
60%
720
29%
1308
September21st to endNight
49%
720
17%
1980
13%
720
54%
720
24%
1383
October1st to 10thNight
54%
720
24%
2142
21%
720
61%
720
32%
1290
October11th to 20thNight
50%
720
30%
2160
25%
720
60%
720
33%
1255
October21st to endNight
48%
792
32%
2376
22%
792
62%
792
34%
1343
November1st to 10thNight
48%
740
28%
2221
21%
740
58%
740
33%
1295
November11th to 20thNight
39%
760
28%
2337
18%
760
52%
760
30%
1372
November21st to endNight
40%
760
27%
2470
17%
760
54%
760
29%
1417
December1st to 10thNight
35%
760
23%
2470
13%
760
47%
760
20%
1615
December11th to 20thNight
37%
760
26%
2942
18%
758
48%
758
22%
1722
December21st to endNight
33%
825
17%
4403
14%
817
45%
817
14%
2417

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%25%5%35%5%6%8%43%
74978
Night
14%5%25%5%3445%7%45%
74835
TransparencyDay
38%7%12%20%18%5%
74700
Night
38%7%11%19%19%6%
74632
SeeingDay
16%11%25%25%17%6%
14296
Night
16%9%24%31%18%2
24450

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
17%7%35%334346%46%
1706
11th to 20thDay
16%7%35%434445%46%
1665
21st to endDay
15%6%25%424446%49%
1782
February1st to 10thDay
16%7%25%5%3445%8%41%
1620
11th to 20thDay
21%5%24323436%47%
1654
21st to endDay
20%7%36%5%3345%6%40%
1587
March1st to 10thDay
16%5%24314345%52%
1980
11th to 20thDay
16%5%35%5%3446%7%41%
1980
21st to endDay
16%6%35%5%3445%6%41%
2178
April1st to 10thDay
11%41343446%8%52%
2029
11th to 20thDay
12%5%25%5%3445%7%48%
2134
21st to endDay
12%424435%45%7%48%
2204
May1st to 10thDay
9%6%26%6%45%5%5%8%44%
2340
11th to 20thDay
12%6%35%6%46%5%5%6%40%
2301
21st to endDay
10%6%36%6%46%5%6%9%39%
2531
June1st to 10thDay
9%5%26%6%46%5%8%10%39%
2340
11th to 20thDay
9%5%25%6%46%6%7%9%41%
2340
21st to endDay
6%435%6%46%7%8%11%38%
2340
July1st to 10thDay
9%5%26%6%5%7%7%7%12%33%
2340
11th to 20thDay
9%5%35%8%5%8%8%8%12%31%
2340
21st to endDay
6%6%26%6%5%7%7%8%11%35%
2547
August1st to 10thDay
12%5%36%7%46%8%8%11%30%
2327
11th to 20thDay
10%6%36%7%5%8%8%8%9%28%
2281
21st to endDay
11%6%36%6%45%6%7%10%35%
2376
September1st to 10thDay
8%5%25%6%45%5%7%9%44%
2107
11th to 20thDay
13%426%6%45%45%8%44%
1980
21st to endDay
18%6%26%5%45%45%6%39%
1980
October1st to 10thDay
15%5%2442335%6%51%
1816
11th to 20thDay
12%424424435%56%
1800
21st to endDay
14%424323435%56%
1980
November1st to 10thDay
13%5%24423335%57%
1857
11th to 20thDay
15%424324446%54%
1839
21st to endDay
14%4345%2445%6%49%
1710
December1st to 10thDay
19%9%2442445%7%40%
1710
11th to 20thDay
17%324322346%54%
2153
21st to endDay
17%6%35%5%34446%44%
3124
January1st to 10thNight
17%6%25%433345%47%
2459
11th to 20thNight
16%6%25%44445%6%43%
2417
21st to endNight
17%5%24333346%49%
2574
February1st to 10thNight
17%6%35%5%2345%6%45%
2340
11th to 20thNight
20%7%34423446%44%
2189
21st to endNight
17%6%2432445%6%46%
1668
March1st to 10thNight
15%425%424336%51%
1980
11th to 20thNight
16%5%25%5%345%5%8%42%
1980
21st to endNight
16%5%25%5%36%46%5%42%
2178
April1st to 10thNight
14%5%234235%5%6%50%
1929
11th to 20thNight
12%4245%34446%51%
1775
21st to endNight
12%4145%35%45%7%49%
1771
May1st to 10thNight
9%5%26%5%35%46%7%47%
1620
11th to 20thNight
13%5%35%6%46%5%6%9%39%
1592
21st to endNight
10%5%26%6%36%5%6%9%43%
1744
June1st to 10thNight
11%5%36%8%45%6%7%9%36%
1620
11th to 20thNight
10%6%26%7%5%6%7%6%9%37%
1620
21st to endNight
9%5%36%7%35%6%8%13%36%
1620
July1st to 10thNight
8%5%37%7%47%6%8%11%34%
1620
11th to 20thNight
7%5%36%7%5%7%6%8%10%36%
1620
21st to endNight
5%5%37%7%5%6%7%8%12%36%
1771
August1st to 10thNight
9%6%36%6%47%7%7%11%34%
1611
11th to 20thNight
11%5%37%7%5%6%7%7%9%33%
1599
21st to endNight
8%6%26%7%5%6%6%9%11%34%
1980
September1st to 10thNight
9%5%24445%5%7%8%46%
1848
11th to 20thNight
12%7%36%6%3445%7%44%
1980
21st to endNight
17%6%26%6%35%45%7%38%
1980
October1st to 10thNight
13%6%25%423446%51%
2142
11th to 20thNight
13%5%24423445%53%
2160
21st to endNight
11%6%24323446%56%
2376
November1st to 10thNight
13%5%25%323345%54%
2221
11th to 20thNight
12%5%35%424346%51%
2337
21st to endNight
14%5%2433445%7%50%
2470
December1st to 10thNight
18%7%35%4245%5%5%41%
2470
11th to 20thNight
18%5%34433335%50%
3042
21st to endNight
19%5%2443445%6%44%
4532

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
41%48%19%21%6%
1707
11th to 20thDay
42%5%7%18%23%6%
1665
21st to endDay
38%36%21%24%8%
1782
February1st to 10thDay
41%5%10%20%18%6%
1620
11th to 20thDay
41%47%18%23%7%
1663
21st to endDay
46%47%17%18%7%
1587
March1st to 10thDay
35%49%21%25%7%
1980
11th to 20thDay
42%6%10%19%16%7%
1980
21st to endDay
43%6%11%17%19%4
2178
April1st to 10thDay
30%5%11%21%26%7%
2029
11th to 20thDay
35%5%11%20%20%9%
2134
21st to endDay
34%7%12%22%20%5%
2204
May1st to 10thDay
37%9%13%19%19%3
2340
11th to 20thDay
43%8%13%19%15%2
2305
21st to endDay
40%9%13%21%16%1
2531
June1st to 10thDay
38%10%16%21%14%1
2340
11th to 20thDay
36%10%18%20%14%2
2340
21st to endDay
34%13%16%21%14%2
2340
July1st to 10thDay
39%14%18%17%11%2
2275
11th to 20thDay
40%14%20%17%7%2
2271
21st to endDay
38%13%19%20%9%1
2405
August1st to 10thDay
44%12%17%18%9%1
2314
11th to 20thDay
47%13%16%15%9%1
2281
21st to endDay
42%10%17%19%10%3
2376
September1st to 10thDay
35%9%16%18%17%5%
2107
11th to 20thDay
38%7%12%16%22%4
1980
21st to endDay
43%8%8%19%16%5%
1980
October1st to 10thDay
35%6%8%21%25%5%
1816
11th to 20thDay
30%6%8%25%23%8%
1800
21st to endDay
32%48%21%26%10%
1980
November1st to 10thDay
32%47%19%29%9%
1857
11th to 20thDay
32%49%21%27%8%
1839
21st to endDay
36%5%8%21%23%8%
1710
December1st to 10thDay
45%410%20%17%4
1710
11th to 20thDay
32%37%21%26%9%
2150
21st to endDay
41%5%8%22%21%3
3124
January1st to 10thNight
39%49%16%24%6%
2459
11th to 20thNight
42%5%9%16%22%6%
2417
21st to endNight
38%36%20%26%7%
2574
February1st to 10thNight
41%410%19%20%7%
2340
11th to 20thNight
43%39%16%22%7%
2191
21st to endNight
39%410%18%20%8%
1668
March1st to 10thNight
37%39%18%24%9%
1980
11th to 20thNight
41%6%11%16%21%6%
1980
21st to endNight
41%7%12%18%17%5%
2178
April1st to 10thNight
34%5%10%21%24%8%
1929
11th to 20thNight
35%5%9%21%21%9%
1775
21st to endNight
34%6%12%22%21%5%
1771
May1st to 10thNight
34%8%14%23%17%4
1620
11th to 20thNight
41%9%14%19%16%1
1593
21st to endNight
37%10%15%24%12%2
1745
June1st to 10thNight
41%10%15%21%12%2
1620
11th to 20thNight
41%10%17%19%12%1
1620
21st to endNight
36%14%15%20%11%3
1620
July1st to 10thNight
41%13%17%16%10%3
1575
11th to 20thNight
38%13%22%18%7%2
1566
21st to endNight
38%13%21%18%9%1
1672
August1st to 10thNight
40%13%20%19%7%1
1600
11th to 20thNight
43%12%19%18%8%1
1599
21st to endNight
39%13%19%21%7%2
1980
September1st to 10thNight
35%9%15%21%15%6%
1848
11th to 20thNight
39%8%14%16%21%3
1980
21st to endNight
45%7%12%15%16%4
1980
October1st to 10thNight
35%5%11%19%25%6%
2142
11th to 20thNight
32%6%9%22%23%9%
2160
21st to endNight
31%47%21%26%12%
2376
November1st to 10thNight
33%5%7%18%25%13%
2221
11th to 20thNight
35%47%16%25%13%
2337
21st to endNight
34%47%21%25%8%
2470
December1st to 10thNight
44%6%9%17%19%6%
2470
11th to 20thNight
39%47%18%24%8%
3044
21st to endNight
40%5%8%21%23%3
4532

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
21%24%39%15%1
270
11th to 20thDay
22%24%36%12%4
255
21st to endDay
20%27%38%13%3
264
February1st to 10thDay
22%22%40%13%3
240
11th to 20thDay
33%23%36%7%1
240
21st to endDay
27%24%30%17%2
305
March1st to 10thDay
20%21%31%21%6%
420
11th to 20thDay
21%22%37%14%5%
420
21st to endDay
21%21%32%19%6%1
462
April1st to 10thDay
22%20%29%19%10%1
420
11th to 20thDay
13%19%31%20%14%2
412
21st to endDay
16%12%30%26%12%4
420
May1st to 10thDay
13%17%35%23%9%4
423
11th to 20thDay
15%8%23%26%22%5%
447
21st to endDay
16%6%19%26%25%8%
485
June1st to 10thDay
12%420%34%24%6%
450
11th to 20thDay
10%6%22%26%25%11%
450
21st to endDay
8%418%34%28%8%
450
July1st to 10thDay
10%213%27%31%18%
445
11th to 20thDay
11%112%29%32%15%
444
21st to endDay
7%113%35%31%13%
488
August1st to 10thDay
16%314%29%25%13%
446
11th to 20thDay
12%312%32%25%16%
439
21st to endDay
14%113%28%26%17%
495
September1st to 10thDay
12%213%29%27%16%
450
11th to 20thDay
15%414%28%27%11%
450
21st to endDay
19%8%18%31%19%5%
450
October1st to 10thDay
17%7%21%26%22%7%
450
11th to 20thDay
12%9%26%30%18%6%
450
21st to endDay
15%10%29%27%15%4
495
November1st to 10thDay
18%10%29%28%13%2
455
11th to 20thDay
18%15%33%22%11%2
399
21st to endDay
13%16%36%23%10%2
270
December1st to 10thDay
26%14%39%17%4
270
11th to 20thDay
22%16%33%21%8%1
270
21st to endDay
25%15%33%18%7%2
297
January1st to 10thNight
23%14%30%27%5%1
760
11th to 20thNight
20%13%32%30%5%
744
21st to endNight
20%13%34%30%3
792
February1st to 10thNight
20%14%34%29%4
720
11th to 20thNight
26%16%37%19%2
703
21st to endNight
19%16%34%25%5%
592
March1st to 10thNight
18%13%35%29%4
720
11th to 20thNight
18%16%32%24%9%1
720
21st to endNight
18%15%34%26%6%
792
April1st to 10thNight
18%15%33%27%8%1
720
11th to 20thNight
16%13%31%27%13%
711
21st to endNight
15%8%30%35%11%
691
May1st to 10thNight
12%11%32%34%12%
540
11th to 20thNight
15%6%22%34%22%1
531
21st to endNight
12%214%40%30%1
584
June1st to 10thNight
10%221%39%24%3
540
11th to 20thNight
13%416%31%32%6%
540
21st to endNight
10%214%39%32%4
540
July1st to 10thNight
10%211%31%41%6%
525
11th to 20thNight
10%28%33%39%8%
522
21st to endNight
6%112%36%39%6%
591
August1st to 10thNight
11%211%33%37%6%
537
11th to 20thNight
13%19%34%37%6%
535
21st to endNight
11%113%31%39%5%
792
September1st to 10thNight
9%211%32%39%6%
720
11th to 20thNight
15%315%28%34%5%
720
21st to endNight
19%5%19%33%23%2
720
October1st to 10thNight
16%6%19%26%28%5%
720
11th to 20thNight
15%7%23%32%19%3
720
21st to endNight
15%10%22%31%20%2
792
November1st to 10thNight
16%8%24%32%17%3
740
11th to 20thNight
15%12%29%32%11%
760
21st to endNight
17%10%28%31%13%1
760
December1st to 10thNight
22%11%28%33%6%
760
11th to 20thNight
19%10%28%33%10%
760
21st to endNight
25%11%25%30%9%
836
Page generated at 2024-01-13 09:37:56. Version ac07

Copyright 2024 Attilla Danko


Town Creek Indian Mound Clear Sky Chart |Charts Home