Muscatine
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Muscatine clear sky chart from 2005-11-06 to 2024-01-14.

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%
24610
19%
74670
11%
24556
45%
24556
25%
48690

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
24%
950
15%
2648
5%
946
32%
946
21%
1857
January11th to 20thNight
22%
918
12%
2533
4%
918
29%
918
18%
1919
January21st to endNight
21%
990
14%
2574
4%
990
28%
990
18%
1911
February1st to 10thNight
22%
900
13%
2340
3%
900
28%
900
20%
1722
February11th to 20thNight
26%
807
18%
2206
7%
807
33%
807
23%
1501
February21st to endNight
21%
592
20%
1776
6%
592
34%
592
20%
1210
March1st to 10thNight
24%
694
17%
2134
7%
694
34%
694
22%
1413
March11th to 20thNight
33%
540
19%
1980
13%
540
42%
540
20%
1257
March21st to endNight
23%
594
12%
2082
6%
594
32%
594
13%
1508
April1st to 10thNight
25%
540
17%
1800
9%
540
37%
540
22%
1146
April11th to 20thNight
32%
533
21%
1775
16%
533
43%
533
22%
1148
April21st to endNight
32%
540
16%
1800
10%
540
42%
540
22%
1173
May1st to 10thNight
32%
540
17%
1562
10%
540
39%
540
25%
1047
May11th to 20thNight
39%
531
19%
1417
10%
531
45%
531
27%
958
May21st to endNight
48%
584
18%
1551
9%
582
54%
582
30%
1028
June1st to 10thNight
57%
540
17%
1440
10%
540
61%
540
37%
876
June11th to 20thNight
52%
540
20%
1440
12%
540
56%
540
37%
891
June21st to endNight
53%
540
19%
1440
11%
540
56%
540
37%
888
July1st to 10thNight
70%
525
19%
1400
14%
525
71%
525
42%
826
July11th to 20thNight
67%
522
26%
1392
17%
522
72%
522
49%
758
July21st to endNight
68%
591
24%
1521
19%
558
71%
558
42%
877
August1st to 10thNight
72%
537
21%
1601
22%
534
74%
534
38%
885
August11th to 20thNight
68%
534
26%
1679
29%
534
72%
534
39%
909
August21st to endNight
68%
594
26%
1980
28%
594
73%
594
41%
1017
September1st to 10thNight
61%
540
26%
1800
26%
540
66%
540
36%
977
September11th to 20thNight
59%
540
33%
1800
32%
540
65%
540
35%
980
September21st to endNight
54%
694
26%
2012
17%
694
62%
694
38%
1138
October1st to 10thNight
46%
720
24%
2160
18%
720
51%
720
33%
1269
October11th to 20thNight
36%
720
24%
2160
13%
720
47%
720
28%
1315
October21st to endNight
29%
792
19%
2425
10%
792
38%
792
23%
1570
November1st to 10thNight
34%
740
26%
2406
16%
740
48%
740
32%
1346
November11th to 20thNight
26%
802
21%
2512
10%
802
39%
802
23%
1610
November21st to endNight
27%
950
19%
2660
8%
950
36%
950
23%
1808
December1st to 10thNight
24%
950
14%
2660
5%
950
31%
950
21%
1865
December11th to 20thNight
27%
949
16%
3158
6%
948
33%
948
17%
2184
December21st to endNight
19%
1037
8%
4846
5%
1026
28%
1026
8%
3903

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%8%36%5%35%5%5%7%39%
74756
Night
13%8%46%5%3445%6%41%
75015
TransparencyDay
45%412%24%13%2
74459
Night
44%412%24%15%2
74832
SeeingDay
16%9%28%27%15%5%
14645
Night
17%8%30%31%12%1
24623

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
11%12%5%9%9%5%45%7%7%27%
1517
11th to 20thDay
13%14%6%13%8%445%6%423%
1498
21st to endDay
15%14%7%10%7%4435%5%27%
1782
February1st to 10thDay
15%12%5%8%6%45%446%29%
1620
11th to 20thDay
15%9%5%7%6%5%5%447%35%
1640
21st to endDay
14%11%49%7%3345%7%33%
1480
March1st to 10thDay
15%10%5%7%6%35%346%36%
1840
11th to 20thDay
13%9%5%7%6%36%5%5%7%35%
1980
21st to endDay
22%10%5%7%6%4445%6%28%
2272
April1st to 10thDay
16%11%5%7%5%335%47%34%
2160
11th to 20thDay
18%8%46%6%3445%6%37%
2134
21st to endDay
21%8%36%6%445%5%6%34%
2160
May1st to 10thDay
17%8%37%6%45%5%6%8%31%
2392
11th to 20thDay
20%7%35%5%35%5%5%7%35%
2479
21st to endDay
15%7%36%6%35%6%6%8%34%
2725
June1st to 10thDay
9%5%25%5%45%5%7%9%44%
2520
11th to 20thDay
10%5%25%5%445%5%8%47%
2520
21st to endDay
11%6%25%5%36%6%7%8%41%
2520
July1st to 10thDay
8%425%435%5%5%10%50%
2520
11th to 20thDay
9%424435%6%6%9%48%
2520
21st to endDay
6%425%436%6%6%11%47%
2703
August1st to 10thDay
7%425%6%46%7%8%10%42%
2328
11th to 20thDay
9%5%25%5%345%6%8%48%
2221
21st to endDay
9%425%4345%5%8%52%
2376
September1st to 10thDay
13%415%435%5%5%8%48%
2160
11th to 20thDay
10%42342445%7%54%
2160
21st to endDay
10%435%435%46%8%48%
1924
October1st to 10thDay
14%6%35%43435%6%48%
1800
11th to 20thDay
17%7%36%5%33446%42%
1800
21st to endDay
20%8%35%423445%42%
1928
November1st to 10thDay
11%8%45%4345%5%6%46%
1672
11th to 20thDay
15%10%46%5%33449%36%
1664
21st to endDay
17%10%37%424447%38%
1520
December1st to 10thDay
15%12%410%425%45%5%34%
1520
11th to 20thDay
13%11%47%6%45%46%6%34%
1918
21st to endDay
23%20%7%10%6%3443417%
2783
January1st to 10thNight
12%10%6%8%6%45%445%36%
2648
11th to 20thNight
13%13%7%9%7%45%446%29%
2533
21st to endNight
14%11%5%10%7%35%45%6%31%
2574
February1st to 10thNight
16%11%5%7%7%3435%7%32%
2340
11th to 20thNight
13%9%37%6%3445%6%39%
2205
21st to endNight
16%11%47%6%34335%39%
1776
March1st to 10thNight
15%9%46%5%3345%6%41%
2134
11th to 20thNight
13%8%47%6%3445%7%39%
1980
21st to endNight
21%10%48%6%35%5%5%5%29%
2082
April1st to 10thNight
16%9%45%43335%6%41%
1800
11th to 20thNight
18%8%35%5%24345%42%
1775
21st to endNight
17%6%36%5%35%5%5%7%37%
1800
May1st to 10thNight
17%7%36%6%3435%7%40%
1562
11th to 20thNight
17%6%35%6%45%46%5%40%
1416
21st to endNight
10%5%36%5%35%5%6%9%42%
1551
June1st to 10thNight
8%5%26%5%25%5%6%8%50%
1440
11th to 20thNight
9%426%5%35%6%6%8%46%
1440
21st to endNight
10%5%25%44346%8%48%
1440
July1st to 10thNight
7%314425%5%7%10%51%
1440
11th to 20thNight
5%3134235%6%8%60%
1440
21st to endNight
6%3245%35%5%6%10%50%
1611
August1st to 10thNight
5%415%435%6%6%8%54%
1611
11th to 20thNight
7%4245%345%5%8%54%
1679
21st to endNight
8%224423448%58%
1980
September1st to 10thNight
11%5%24433346%55%
1800
11th to 20thNight
11%42443345%7%52%
1800
21st to endNight
7%5%25%4345%5%8%53%
2012
October1st to 10thNight
12%5%34434345%53%
2160
11th to 20thNight
15%6%35%5%3335%6%47%
2160
21st to endNight
19%8%36%433345%41%
2425
November1st to 10thNight
11%6%24423446%54%
2406
11th to 20thNight
14%8%45%5%3445%6%41%
2512
21st to endNight
17%9%36%43345%6%39%
2660
December1st to 10thNight
13%12%47%6%35%446%36%
2660
11th to 20thNight
15%10%5%7%6%35%45%6%35%
3279
21st to endNight
21%17%7%9%6%3444420%
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
56%414%15%10%1
1518
11th to 20thDay
62%411%17%6%
1498
21st to endDay
62%311%15%8%1
1782
February1st to 10thDay
56%315%19%6%1
1620
11th to 20thDay
51%412%22%10%1
1649
21st to endDay
53%312%22%9%1
1480
March1st to 10thDay
50%413%23%10%1
1840
11th to 20thDay
50%413%23%10%1
1980
21st to endDay
58%311%20%6%1
2272
April1st to 10thDay
52%212%22%11%
2160
11th to 20thDay
49%39%25%13%2
2134
21st to endDay
52%310%19%14%2
2160
May1st to 10thDay
50%6%12%22%10%1
2392
11th to 20thDay
49%5%10%23%12%
2483
21st to endDay
46%6%13%19%14%2
2725
June1st to 10thDay
36%5%15%26%16%2
2520
11th to 20thDay
35%5%11%23%23%3
2520
21st to endDay
38%6%15%24%15%2
2520
July1st to 10thDay
31%5%15%30%16%4
2451
11th to 20thDay
32%6%15%28%15%3
2445
21st to endDay
31%6%16%30%16%2
2553
August1st to 10thDay
36%6%16%29%12%1
2314
11th to 20thDay
34%5%13%30%17%1
2221
21st to endDay
31%5%12%29%20%3
2376
September1st to 10thDay
35%410%27%19%4
2160
11th to 20thDay
30%312%31%21%3
2160
21st to endDay
34%410%31%19%2
1924
October1st to 10thDay
38%310%27%21%1
1800
11th to 20thDay
44%38%26%16%2
1800
21st to endDay
45%313%24%13%2
1928
November1st to 10thDay
39%314%25%14%3
1672
11th to 20thDay
47%314%22%13%1
1664
21st to endDay
49%414%23%10%
1520
December1st to 10thDay
53%314%21%8%1
1520
11th to 20thDay
51%313%22%8%2
1915
21st to endDay
73%39%11%5%
2783
January1st to 10thNight
51%312%20%14%1
2648
11th to 20thNight
57%415%16%8%
2533
21st to endNight
56%313%19%9%1
2574
February1st to 10thNight
54%312%20%11%1
2340
11th to 20thNight
46%412%25%12%1
2206
21st to endNight
49%39%22%14%2
1776
March1st to 10thNight
46%412%26%12%1
2134
11th to 20thNight
46%412%23%13%3
1980
21st to endNight
58%410%18%9%1
2082
April1st to 10thNight
45%211%25%15%2
1800
11th to 20thNight
46%37%23%17%4
1775
21st to endNight
47%313%21%13%3
1800
May1st to 10thNight
46%412%24%13%1
1562
11th to 20thNight
44%412%22%16%1
1417
21st to endNight
39%6%12%24%15%3
1552
June1st to 10thNight
32%5%15%25%19%3
1440
11th to 20thNight
33%5%10%25%22%5%
1440
21st to endNight
34%415%23%20%3
1440
July1st to 10thNight
29%5%14%32%17%4
1400
11th to 20thNight
23%5%13%35%21%2
1392
21st to endNight
28%5%14%31%19%3
1521
August1st to 10thNight
27%6%17%32%14%3
1601
11th to 20thNight
28%413%31%21%3
1679
21st to endNight
26%411%31%22%7%
1980
September1st to 10thNight
31%49%26%27%4
1800
11th to 20thNight
32%310%29%20%5%
1800
21st to endNight
30%49%30%24%3
2012
October1st to 10thNight
35%39%25%24%4
2160
11th to 20thNight
39%310%25%20%3
2160
21st to endNight
46%211%22%17%2
2425
November1st to 10thNight
33%413%27%19%4
2406
11th to 20thNight
45%311%26%14%2
2512
21st to endNight
47%311%26%12%1
2660
December1st to 10thNight
51%313%24%9%1
2660
11th to 20thNight
51%312%25%8%1
3281
21st to endNight
69%39%14%5%
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
22%14%35%20%8%1
270
11th to 20thDay
23%18%39%16%41
249
21st to endDay
20%16%36%20%6%2
264
February1st to 10thDay
25%15%42%13%4
240
11th to 20thDay
25%18%33%18%5%1
240
21st to endDay
24%16%45%13%21
198
March1st to 10thDay
18%20%40%18%4
240
11th to 20thDay
20%21%33%18%7%2
240
21st to endDay
29%16%34%15%5%1
358
April1st to 10thDay
24%13%35%20%7%
420
11th to 20thDay
23%15%28%21%12%1
412
21st to endDay
24%11%34%19%10%2
420
May1st to 10thDay
17%11%37%25%8%2
549
11th to 20thDay
22%11%27%24%14%2
625
21st to endDay
18%6%27%27%15%8%
679
June1st to 10thDay
7%5%24%33%22%8%
630
11th to 20thDay
10%427%33%21%4
630
21st to endDay
11%7%28%32%18%4
630
July1st to 10thDay
9%416%31%25%16%
621
11th to 20thDay
11%419%37%22%7%
618
21st to endDay
5%220%39%28%6%
684
August1st to 10thDay
7%222%35%26%9%
626
11th to 20thDay
9%416%34%25%12%
535
21st to endDay
8%318%35%25%11%
495
September1st to 10thDay
14%5%18%33%22%8%
450
11th to 20thDay
7%319%38%23%10%
450
21st to endDay
13%7%25%26%21%9%
388
October1st to 10thDay
20%7%24%28%15%6%
270
11th to 20thDay
19%19%32%20%9%1
270
21st to endDay
34%10%29%20%5%1
297
November1st to 10thDay
14%8%46%20%9%4
270
11th to 20thDay
21%16%30%23%7%2
270
21st to endDay
26%9%37%23%5%
270
December1st to 10thDay
16%17%36%22%6%3
270
11th to 20thDay
17%16%35%23%10%
270
21st to endDay
26%20%35%17%2
297
January1st to 10thNight
17%11%39%25%7%1
950
11th to 20thNight
20%11%36%27%6%
918
21st to endNight
19%12%36%28%5%
990
February1st to 10thNight
23%10%37%25%4
900
11th to 20thNight
18%13%36%29%3
811
21st to endNight
23%14%38%22%31
592
March1st to 10thNight
20%11%40%23%5%1
694
11th to 20thNight
18%10%33%31%8%
540
21st to endNight
26%11%34%25%5%1
594
April1st to 10thNight
21%14%37%24%3
540
11th to 20thNight
22%13%28%30%7%1
533
21st to endNight
20%8%33%31%8%
540
May1st to 10thNight
20%6%36%29%8%1
540
11th to 20thNight
19%5%29%36%10%1
531
21st to endNight
11%428%35%20%2
584
June1st to 10thNight
11%321%48%16%1
540
11th to 20thNight
10%326%42%18%
540
21st to endNight
11%424%41%19%1
540
July1st to 10thNight
8%212%41%33%4
525
11th to 20thNight
6%219%44%27%3
522
21st to endNight
7%216%42%31%2
591
August1st to 10thNight
6%212%46%32%3
537
11th to 20thNight
7%112%44%29%6%
534
21st to endNight
8%115%45%27%4
594
September1st to 10thNight
12%317%39%24%4
540
11th to 20thNight
12%319%35%26%6%
540
21st to endNight
9%6%24%35%24%2
694
October1st to 10thNight
14%6%28%31%19%2
720
11th to 20thNight
19%10%29%31%10%
720
21st to endNight
23%10%34%26%7%
792
November1st to 10thNight
15%8%38%30%8%1
740
11th to 20thNight
19%12%37%25%6%
802
21st to endNight
21%12%35%26%6%
950
December1st to 10thNight
19%11%38%25%6%1
950
11th to 20thNight
23%10%33%28%6%
950
21st to endNight
27%13%32%24%3
1045
Page generated at 2024-01-11 03:22:43. Version ac07

Copyright 2024 Attilla Danko


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