Cleveland(TX)
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Cleveland(TX) 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
47%
23729
23%
74239
16%
23670
54%
23670
28%
44880

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
29%
950
25%
2458
9%
946
40%
946
27%
1620
January11th to 20thNight
32%
920
26%
2392
9%
920
41%
920
28%
1556
January21st to endNight
30%
990
25%
2574
9%
990
39%
990
27%
1734
February1st to 10thNight
24%
869
20%
2309
6%
869
32%
869
22%
1579
February11th to 20thNight
25%
668
19%
2062
8%
664
34%
664
20%
1367
February21st to endNight
21%
444
23%
1628
10%
444
36%
444
15%
1076
March1st to 10thNight
26%
540
23%
1980
11%
540
40%
540
19%
1261
March11th to 20thNight
28%
540
20%
1980
13%
540
38%
540
19%
1274
March21st to endNight
29%
594
22%
2178
14%
594
42%
594
23%
1299
April1st to 10thNight
27%
540
21%
1980
13%
540
39%
540
20%
1258
April11th to 20thNight
33%
533
22%
1789
15%
533
44%
533
22%
1117
April21st to endNight
36%
540
24%
1800
16%
540
48%
540
24%
1080
May1st to 10thNight
35%
540
19%
1771
15%
540
44%
540
22%
1128
May11th to 20thNight
44%
531
21%
1594
20%
531
50%
531
30%
988
May21st to endNight
54%
584
22%
1745
19%
582
62%
582
34%
1024
June1st to 10thNight
70%
540
21%
1620
22%
540
74%
540
40%
903
June11th to 20thNight
66%
540
21%
1620
21%
540
72%
540
43%
854
June21st to endNight
67%
540
18%
1620
20%
540
69%
540
32%
991
July1st to 10thNight
73%
525
15%
1575
17%
525
75%
525
34%
950
July11th to 20thNight
83%
522
22%
1566
25%
522
85%
522
45%
823
July21st to endNight
81%
591
18%
1673
21%
558
82%
558
39%
939
August1st to 10thNight
85%
537
25%
1601
26%
534
87%
534
54%
773
August11th to 20thNight
82%
534
21%
1697
24%
534
84%
534
39%
932
August21st to endNight
77%
594
16%
1980
17%
594
78%
594
30%
1176
September1st to 10thNight
75%
540
18%
1962
20%
540
76%
540
32%
1071
September11th to 20thNight
66%
540
20%
1980
22%
540
67%
540
25%
1206
September21st to endNight
69%
540
28%
1980
28%
540
72%
540
34%
1041
October1st to 10thNight
71%
652
31%
2092
29%
652
73%
652
42%
1082
October11th to 20thNight
55%
720
34%
2160
22%
720
63%
720
40%
1179
October21st to endNight
49%
792
33%
2376
23%
792
56%
792
36%
1346
November1st to 10thNight
55%
740
28%
2220
21%
740
59%
740
36%
1255
November11th to 20thNight
46%
760
28%
2280
19%
760
54%
760
30%
1356
November21st to endNight
38%
802
27%
2322
15%
802
46%
802
27%
1480
December1st to 10thNight
37%
950
25%
2470
13%
950
44%
950
27%
1685
December11th to 20thNight
30%
948
23%
2879
9%
948
37%
948
20%
1914
December21st to endNight
30%
1039
14%
4326
9%
1026
37%
1026
17%
2563

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
12%6%36%6%45%5%6%8%40%
74977
Night
13%6%2443445%8%47%
74809
TransparencyDay
41%7%11%18%16%7%
74702
Night
36%6%13%20%17%9%
74604
SeeingDay
14%9%21%26%22%8%
13770
Night
16%8%23%32%19%2
23737

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
19%6%25%424446%44%
1707
11th to 20thDay
20%6%345%34245%44%
1647
21st to endDay
19%7%26%333446%42%
1782
February1st to 10thDay
22%8%46%434335%38%
1665
11th to 20thDay
22%8%36%6%3434438%
1782
21st to endDay
23%7%35%5%24345%38%
1628
March1st to 10thDay
22%7%36%5%34346%35%
1980
11th to 20thDay
18%7%36%5%35%45%7%37%
1980
21st to endDay
16%7%36%5%2445%6%41%
2178
April1st to 10thDay
16%8%37%6%35%5%5%6%38%
1980
11th to 20thDay
18%7%36%5%44446%39%
2120
21st to endDay
11%5%36%6%3445%6%44%
2160
May1st to 10thDay
12%6%36%6%46%5%7%8%37%
2184
11th to 20thDay
10%6%36%5%46%5%6%9%39%
2302
21st to endDay
9%6%37%7%5%7%7%7%11%30%
2531
June1st to 10thDay
7%426%7%5%8%7%8%10%37%
2340
11th to 20thDay
6%425%6%5%7%8%9%10%38%
2340
21st to endDay
7%6%38%8%6%8%9%8%8%29%
2340
July1st to 10thDay
9%5%46%8%6%8%8%8%8%31%
2340
11th to 20thDay
5%436%7%5%8%7%8%11%35%
2340
21st to endDay
5%5%35%7%5%8%7%8%12%34%
2546
August1st to 10thDay
3325%7%48%7%8%14%40%
2328
11th to 20thDay
5%5%25%6%5%7%7%7%11%40%
2200
21st to endDay
8%5%36%7%5%7%7%8%10%35%
2376
September1st to 10thDay
7%5%27%6%47%7%7%10%38%
1994
11th to 20thDay
15%7%26%6%45%5%7%7%36%
1980
21st to endDay
8%425%6%46%5%6%7%46%
1980
October1st to 10thDay
7%4245%35%45%7%55%
1850
11th to 20thDay
10%5%25%4345%46%51%
1800
21st to endDay
14%5%23424345%53%
1980
November1st to 10thDay
11%5%25%6%45%45%6%48%
1858
11th to 20thDay
12%6%35%5%4445%5%48%
1900
21st to endDay
16%7%37%6%23345%43%
1853
December1st to 10thDay
16%9%35%5%35%447%40%
1710
11th to 20thDay
16%7%35%6%3445%6%40%
2161
21st to endDay
18%7%25%423446%45%
3135
January1st to 10thNight
19%7%34323347%44%
2458
11th to 20thNight
20%5%24423336%48%
2392
21st to endNight
18%8%26%5%23346%43%
2574
February1st to 10thNight
19%9%35%424346%40%
2309
11th to 20thNight
23%8%35%422346%41%
2062
21st to endNight
24%7%36%423445%38%
1628
March1st to 10thNight
21%7%35%434346%40%
1980
11th to 20thNight
18%8%35%5%3435%6%39%
1980
21st to endNight
15%6%35%424347%46%
2178
April1st to 10thNight
15%6%36%5%35%5%5%8%39%
1980
11th to 20thNight
18%6%36%33435%7%43%
1789
21st to endNight
14%6%35%5%34447%46%
1800
May1st to 10thNight
13%7%35%5%45%5%5%7%40%
1771
11th to 20thNight
14%5%245%345%6%8%45%
1593
21st to endNight
8%5%25%5%345%6%12%46%
1745
June1st to 10thNight
5%4134345%7%12%51%
1620
11th to 20thNight
5%213435%5%6%12%54%
1620
21st to endNight
5%5%35%5%35%7%8%12%43%
1620
July1st to 10thNight
5%425%5%26%5%8%12%44%
1620
11th to 20thNight
3313325%5%6%13%56%
1620
21st to endNight
3324425%6%7%15%50%
1772
August1st to 10thNight
221232347%13%61%
1611
11th to 20thNight
43134346%7%14%50%
1697
21st to endNight
7%4145%36%6%8%12%45%
1980
September1st to 10thNight
5%426%5%445%7%10%49%
1962
11th to 20thNight
12%5%35%5%5%45%6%8%42%
1980
21st to endNight
8%4244235%5%9%53%
1980
October1st to 10thNight
6%3234245%48%59%
2092
11th to 20thNight
11%42332335%6%59%
2160
21st to endNight
13%5%24323335%57%
2376
November1st to 10thNight
12%5%23423446%54%
2220
11th to 20thNight
12%6%25%43445%5%51%
2280
21st to endNight
17%7%25%434446%45%
2322
December1st to 10thNight
18%8%35%434446%42%
2470
11th to 20thNight
18%9%35%424345%43%
3036
21st to endNight
17%8%25%424445%46%
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
42%46%16%22%10%
1708
11th to 20thDay
44%35%16%21%11%
1647
21st to endDay
44%45%14%20%12%
1782
February1st to 10thDay
51%35%14%16%11%
1665
11th to 20thDay
50%37%14%17%10%
1792
21st to endDay
49%48%12%16%10%
1628
March1st to 10thDay
51%49%11%18%7%
1980
11th to 20thDay
47%5%7%12%20%9%
1980
21st to endDay
45%49%14%22%7%
2178
April1st to 10thDay
48%6%6%16%17%8%
1980
11th to 20thDay
47%48%15%17%10%
2120
21st to endDay
39%5%9%18%22%6%
2160
May1st to 10thDay
43%7%9%17%16%7%
2184
11th to 20thDay
40%7%10%22%18%3
2306
21st to endDay
45%9%12%21%12%1
2531
June1st to 10thDay
39%8%15%22%15%1
2340
11th to 20thDay
36%9%17%23%13%2
2340
21st to endDay
47%10%15%19%8%
2340
July1st to 10thDay
45%11%19%20%5%
2276
11th to 20thDay
38%10%21%23%8%
2271
21st to endDay
36%12%23%23%6%1
2405
August1st to 10thDay
30%11%20%28%11%1
2314
11th to 20thDay
34%11%20%24%9%2
2200
21st to endDay
41%12%18%19%8%2
2376
September1st to 10thDay
39%11%13%18%14%5%
1994
11th to 20thDay
45%8%13%15%14%5%
1980
21st to endDay
34%7%12%19%17%10%
1980
October1st to 10thDay
29%6%9%21%21%13%
1850
11th to 20thDay
33%5%6%19%22%16%
1800
21st to endDay
33%46%14%25%17%
1980
November1st to 10thDay
36%5%10%18%21%11%
1858
11th to 20thDay
38%5%7%15%23%13%
1900
21st to endDay
44%46%17%17%11%
1853
December1st to 10thDay
45%5%9%16%18%7%
1710
11th to 20thDay
43%5%7%15%20%10%
2159
21st to endDay
42%46%15%24%10%
3135
January1st to 10thNight
41%45%17%22%11%
2458
11th to 20thNight
40%36%18%21%12%
2392
21st to endNight
44%36%15%19%14%
2574
February1st to 10thNight
47%37%13%17%13%
2309
11th to 20thNight
47%46%14%18%11%
2062
21st to endNight
50%36%13%14%13%
1628
March1st to 10thNight
46%47%17%16%10%
1980
11th to 20thNight
46%5%10%12%18%9%
1980
21st to endNight
40%5%11%15%21%9%
2178
April1st to 10thNight
43%7%9%17%15%9%
1980
11th to 20thNight
42%5%8%17%16%12%
1789
21st to endNight
40%5%8%20%21%7%
1800
May1st to 10thNight
42%6%11%17%17%7%
1771
11th to 20thNight
36%6%12%22%19%4
1594
21st to endNight
30%7%19%30%11%2
1746
June1st to 10thNight
24%9%19%31%16%
1620
11th to 20thNight
21%8%20%30%17%3
1620
21st to endNight
30%11%20%28%10%1
1620
July1st to 10thNight
30%10%28%26%6%
1575
11th to 20thNight
19%10%32%30%9%
1566
21st to endNight
22%12%30%29%6%
1673
August1st to 10thNight
14%8%30%38%10%1
1601
11th to 20thNight
21%12%29%28%8%1
1697
21st to endNight
29%12%24%24%8%2
1980
September1st to 10thNight
29%9%23%22%12%6%
1962
11th to 20thNight
38%8%16%18%14%5%
1980
21st to endNight
28%6%15%21%19%11%
1980
October1st to 10thNight
24%6%10%27%19%15%
2092
11th to 20thNight
26%6%7%22%24%15%
2160
21st to endNight
31%47%16%24%20%
2376
November1st to 10thNight
31%411%20%23%11%
2220
11th to 20thNight
35%49%18%22%11%
2280
21st to endNight
41%48%17%18%11%
2322
December1st to 10thNight
44%49%19%15%10%
2470
11th to 20thNight
45%37%11%20%14%
3037
21st to endNight
41%46%14%27%8%
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
26%17%37%13%6%1
270
11th to 20thDay
28%13%32%21%5%1
249
21st to endDay
23%22%35%16%4
264
February1st to 10thDay
30%20%33%13%4
240
11th to 20thDay
30%21%30%17%1
240
21st to endDay
31%22%37%8%2
198
March1st to 10thDay
28%20%32%15%5%
240
11th to 20thDay
18%32%32%13%31
240
21st to endDay
21%19%42%14%3
264
April1st to 10thDay
22%18%39%20%2
240
11th to 20thDay
30%15%22%22%11%
398
21st to endDay
18%13%36%23%10%1
420
May1st to 10thDay
18%13%31%26%12%
447
11th to 20thDay
11%9%30%32%15%3
625
21st to endDay
12%8%27%34%15%4
679
June1st to 10thDay
8%317%32%30%10%
630
11th to 20thDay
7%319%37%25%10%
630
21st to endDay
9%314%31%30%13%
630
July1st to 10thDay
7%38%31%35%17%
621
11th to 20thDay
416%29%41%19%
618
21st to endDay
5%2429%41%18%
684
August1st to 10thDay
416%26%44%20%
626
11th to 20thDay
5%1220%51%21%
514
21st to endDay
11%25%18%37%27%
495
September1st to 10thDay
6%6%26%42%19%
284
11th to 20thDay
13%311%29%35%9%
270
21st to endDay
10%111%38%31%9%
270
October1st to 10thDay
7%318%42%24%5%
270
11th to 20thDay
8%7%26%37%16%6%
270
21st to endDay
23%11%24%28%11%3
297
November1st to 10thDay
15%9%26%34%16%1
270
11th to 20thDay
19%9%33%30%8%1
270
21st to endDay
22%20%30%19%7%2
270
December1st to 10thDay
21%14%34%20%7%4
270
11th to 20thDay
25%16%37%19%31
270
21st to endDay
24%16%34%20%5%1
297
January1st to 10thNight
24%12%31%26%7%
950
11th to 20thNight
24%13%27%28%8%
920
21st to endNight
23%13%30%29%5%
990
February1st to 10thNight
25%14%31%25%4
869
11th to 20thNight
27%15%30%23%5%
668
21st to endNight
27%15%32%23%2
444
March1st to 10thNight
26%12%32%25%4
540
11th to 20thNight
19%13%35%28%5%
540
21st to endNight
18%11%40%23%7%
594
April1st to 10thNight
16%11%41%25%7%
540
11th to 20thNight
20%11%32%29%8%
533
21st to endNight
20%10%32%30%9%
540
May1st to 10thNight
16%12%33%31%7%
540
11th to 20thNight
16%5%30%34%14%2
531
21st to endNight
8%5%27%37%20%3
584
June1st to 10thNight
7%314%43%29%5%
540
11th to 20thNight
5%221%44%25%4
540
21st to endNight
7%213%39%33%7%
540
July1st to 10thNight
5%18%44%34%9%
525
11th to 20thNight
316%43%39%7%
522
21st to endNight
326%41%43%5%
591
August1st to 10thNight
116%43%44%5%
537
11th to 20thNight
6%1442%39%8%
534
21st to endNight
8%15%28%50%8%
594
September1st to 10thNight
5%16%29%50%9%
540
11th to 20thNight
13%18%30%41%8%
540
21st to endNight
10%211%31%40%6%
540
October1st to 10thNight
6%313%34%39%4
652
11th to 20thNight
12%5%24%36%22%1
720
21st to endNight
15%8%24%31%20%2
792
November1st to 10thNight
13%5%23%36%22%1
740
11th to 20thNight
14%11%25%36%14%1
760
21st to endNight
20%10%28%28%13%1
802
December1st to 10thNight
23%10%25%29%12%1
950
11th to 20thNight
27%11%27%28%6%
950
21st to endNight
24%11%28%29%7%
1045
Page generated at 2024-01-11 12:31:58. Version ac07

Copyright 2024 Attilla Danko


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