Szabo Pecan Farm
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Szabo Pecan Farm clear sky chart from 2005-11-06 to 2024-01-27.

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
48%
23860
26%
74473
18%
23805
57%
23805
33%
42609

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
37%
948
31%
2458
13%
946
48%
946
38%
1467
January11th to 20thNight
35%
950
28%
2470
11%
950
46%
950
33%
1531
January21st to endNight
33%
930
30%
2570
12%
930
46%
930
31%
1606
February1st to 10thNight
31%
720
28%
2160
12%
720
44%
720
28%
1302
February11th to 20thNight
28%
704
23%
2098
9%
700
40%
700
28%
1270
February21st to endNight
20%
592
27%
1776
6%
592
37%
592
25%
1102
March1st to 10thNight
28%
569
25%
2009
10%
569
43%
569
24%
1204
March11th to 20thNight
32%
540
23%
1980
15%
540
43%
540
22%
1199
March21st to endNight
30%
594
26%
2178
14%
594
46%
594
26%
1218
April1st to 10thNight
28%
540
25%
1980
12%
540
46%
540
26%
1137
April11th to 20thNight
27%
533
22%
1939
13%
533
41%
533
23%
1149
April21st to endNight
28%
540
29%
1650
14%
540
46%
540
30%
998
May1st to 10thNight
32%
540
25%
1620
15%
540
47%
540
30%
982
May11th to 20thNight
43%
531
22%
1594
18%
531
51%
531
31%
971
May21st to endNight
43%
583
22%
1745
16%
582
55%
582
31%
1069
June1st to 10thNight
65%
540
24%
1620
22%
540
74%
540
47%
834
June11th to 20thNight
61%
540
24%
1620
23%
540
67%
540
49%
826
June21st to endNight
68%
540
25%
1620
27%
540
71%
540
39%
906
July1st to 10thNight
72%
525
19%
1575
20%
525
74%
525
36%
912
July11th to 20thNight
81%
522
28%
1566
30%
522
85%
522
53%
749
July21st to endNight
80%
591
27%
1673
27%
558
85%
558
52%
810
August1st to 10thNight
88%
537
32%
1601
36%
534
91%
534
65%
702
August11th to 20thNight
79%
534
25%
1753
30%
534
80%
534
39%
934
August21st to endNight
79%
594
21%
2069
24%
594
81%
594
36%
1081
September1st to 10thNight
73%
540
22%
1980
26%
540
75%
540
32%
1088
September11th to 20thNight
70%
540
21%
1980
24%
540
72%
540
29%
1143
September21st to endNight
71%
540
27%
1980
27%
540
75%
540
36%
1019
October1st to 10thNight
73%
540
35%
1980
34%
540
77%
540
43%
924
October11th to 20thNight
55%
648
32%
2088
21%
648
64%
648
37%
1158
October21st to endNight
48%
792
32%
2376
19%
792
56%
792
37%
1325
November1st to 10thNight
54%
740
30%
2220
20%
740
59%
740
36%
1295
November11th to 20thNight
51%
897
28%
2417
15%
897
57%
897
39%
1406
November21st to endNight
40%
950
27%
2470
13%
950
47%
950
31%
1609
December1st to 10thNight
44%
950
30%
2470
16%
950
51%
950
36%
1524
December11th to 20thNight
35%
948
26%
2882
11%
948
43%
948
25%
1837
December21st to endNight
39%
1038
18%
4306
12%
1026
47%
1026
24%
2322

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
11%5%2443445%7%49%
75012
Night
12%5%2442345%7%53%
75060
TransparencyDay
34%6%10%20%20%10%
74737
Night
32%5%11%20%20%12%
74855
SeeingDay
13%7%22%31%21%6%
13797
Night
14%6%27%37%15%1
23872

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
13%5%23423346%55%
1707
11th to 20thDay
18%5%24313346%50%
1710
21st to endDay
15%6%14334345%52%
1945
February1st to 10thDay
16%8%35%412445%48%
1800
11th to 20thDay
17%7%3432345%6%47%
1749
21st to endDay
20%5%3333333451%
1480
March1st to 10thDay
18%8%35%5%24345%42%
1948
11th to 20thDay
15%7%35%5%34445%47%
1980
21st to endDay
14%6%34423346%51%
2178
April1st to 10thDay
13%7%35%5%3446%5%45%
1980
11th to 20thDay
16%7%25%5%3435%5%45%
1965
21st to endDay
14%5%25%5%34446%49%
2308
May1st to 10thDay
14%6%35%5%35%5%6%8%42%
2340
11th to 20thDay
13%8%35%6%35%5%5%6%40%
2302
21st to endDay
14%6%36%5%45%6%7%8%35%
2531
June1st to 10thDay
5%4245%46%6%6%8%52%
2340
11th to 20thDay
6%3245%35%5%6%10%52%
2340
21st to endDay
7%425%6%36%7%7%10%43%
2340
July1st to 10thDay
9%5%35%6%37%6%7%9%40%
2340
11th to 20thDay
43234346%7%9%56%
2340
21st to endDay
5%22342447%11%55%
2546
August1st to 10thDay
121343345%10%65%
2328
11th to 20thDay
6%4245%36%5%6%9%52%
2143
21st to endDay
4315%6%46%7%8%10%47%
2286
September1st to 10thDay
9%435%6%35%5%5%7%49%
1980
11th to 20thDay
11%5%25%7%5%5%46%8%42%
1980
21st to endDay
7%424435%5%6%8%53%
1980
October1st to 10thDay
6%42443445%7%57%
1980
11th to 20thDay
13%5%235%23445%55%
1854
21st to endDay
12%425%32333460%
1980
November1st to 10thDay
13%7%34423346%50%
1858
11th to 20thDay
10%6%245%3345%5%53%
1758
21st to endDay
17%6%35%423445%48%
1710
December1st to 10thDay
15%6%24424446%51%
1710
11th to 20thDay
16%6%25%434445%46%
2161
21st to endDay
16%6%23312335%55%
3135
January1st to 10thNight
15%5%13323346%57%
2458
11th to 20thNight
15%5%24323345%53%
2470
21st to endNight
16%6%24333345%50%
2570
February1st to 10thNight
17%8%23322335%52%
2160
11th to 20thNight
19%6%24323335%51%
2098
21st to endNight
19%5%24424335%49%
1776
March1st to 10thNight
18%6%2442345%7%46%
2009
11th to 20thNight
15%6%35%434447%46%
1980
21st to endNight
13%5%2432335%7%52%
2178
April1st to 10thNight
11%5%25%43445%8%49%
1980
11th to 20thNight
16%5%25%5%2445%6%47%
1939
21st to endNight
14%6%24323437%50%
1650
May1st to 10thNight
11%6%244345%6%9%47%
1620
11th to 20thNight
10%5%35%5%35%45%8%48%
1593
21st to endNight
12%6%23425%46%10%46%
1745
June1st to 10thNight
43133235%6%10%60%
1620
11th to 20thNight
421223437%10%61%
1620
21st to endNight
7%4233246%5%9%55%
1620
July1st to 10thNight
8%4234345%7%12%48%
1620
11th to 20thNight
311231345%11%65%
1620
21st to endNight
221332347%11%61%
1772
August1st to 10thNight
11121335%9%74%
1611
11th to 20thNight
5%4234345%6%9%57%
1753
21st to endNight
5%324435%6%7%10%52%
2069
September1st to 10thNight
8%4245%35%5%6%7%52%
1980
11th to 20thNight
10%5%25%5%345%6%9%46%
1980
21st to endNight
7%42442446%7%55%
1980
October1st to 10thNight
7%31332335%7%63%
1980
11th to 20thNight
12%42442335%7%55%
2088
21st to endNight
14%423313335%59%
2376
November1st to 10thNight
13%6%23423336%55%
2220
11th to 20thNight
8%5%25%42335%6%57%
2417
21st to endNight
18%5%25%334445%48%
2470
December1st to 10thNight
14%6%23324345%54%
2470
11th to 20thNight
16%8%35%423345%48%
3036
21st to endNight
19%5%2331223455%
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
32%46%20%25%13%
1708
11th to 20thDay
36%36%16%25%13%
1710
21st to endDay
36%35%13%26%16%
1945
February1st to 10thDay
40%46%12%22%16%
1800
11th to 20thDay
40%47%18%19%13%
1759
21st to endDay
39%45%16%20%17%
1480
March1st to 10thDay
45%47%13%20%11%
1948
11th to 20thDay
40%5%7%12%20%16%
1980
21st to endDay
36%410%17%21%12%
2178
April1st to 10thDay
41%6%7%19%16%12%
1980
11th to 20thDay
42%47%16%19%11%
1965
21st to endDay
38%5%6%21%22%9%
2308
May1st to 10thDay
41%7%9%16%20%8%
2340
11th to 20thDay
42%8%9%19%18%4
2306
21st to endDay
43%9%11%20%15%1
2531
June1st to 10thDay
28%8%13%28%20%4
2340
11th to 20thDay
27%7%13%28%19%6%
2340
21st to endDay
33%10%13%22%19%4
2340
July1st to 10thDay
37%8%17%24%12%1
2276
11th to 20thDay
22%8%17%27%23%3
2271
21st to endDay
20%8%20%35%15%1
2405
August1st to 10thDay
16%5%15%39%23%2
2314
11th to 20thDay
28%7%17%30%14%5%
2143
21st to endDay
29%10%16%27%15%4
2286
September1st to 10thDay
35%6%10%23%17%9%
1980
11th to 20thDay
39%8%11%19%18%6%
1980
21st to endDay
29%7%10%20%22%13%
1980
October1st to 10thDay
26%6%11%21%24%13%
1980
11th to 20thDay
32%47%17%22%18%
1854
21st to endDay
30%35%15%26%21%
1980
November1st to 10thDay
37%47%20%22%10%
1858
11th to 20thDay
34%48%19%21%15%
1758
21st to endDay
41%5%416%21%14%
1710
December1st to 10thDay
36%49%20%22%9%
1710
11th to 20thDay
40%6%6%12%23%13%
2159
21st to endDay
34%36%15%28%14%
3135
January1st to 10thNight
31%35%17%25%18%
2458
11th to 20thNight
35%36%16%24%16%
2470
21st to endNight
38%3415%21%19%
2570
February1st to 10thNight
38%36%13%22%18%
2160
11th to 20thNight
38%47%16%20%16%
2098
21st to endNight
41%36%14%18%18%
1776
March1st to 10thNight
39%49%14%22%10%
2009
11th to 20thNight
40%6%8%12%20%15%
1980
21st to endNight
34%6%10%17%20%13%
2178
April1st to 10thNight
35%6%8%18%18%14%
1980
11th to 20thNight
38%6%9%14%18%15%
1939
21st to endNight
37%48%21%20%10%
1650
May1st to 10thNight
34%7%10%21%19%9%
1620
11th to 20thNight
34%7%12%27%16%4
1594
21st to endNight
34%8%14%29%14%2
1746
June1st to 10thNight
20%7%17%30%23%4
1620
11th to 20thNight
19%7%17%30%22%6%
1620
21st to endNight
26%8%15%28%19%4
1620
July1st to 10thNight
27%9%20%29%13%2
1575
11th to 20thNight
15%7%22%32%22%2
1566
21st to endNight
15%7%26%38%13%1
1673
August1st to 10thNight
10%5%20%40%23%2
1601
11th to 20thNight
24%8%21%29%14%4
1753
21st to endNight
25%8%21%28%14%5%
2069
September1st to 10thNight
30%7%13%24%19%8%
1980
11th to 20thNight
34%7%16%23%14%6%
1980
21st to endNight
27%6%14%22%18%13%
1980
October1st to 10thNight
22%412%26%22%14%
1980
11th to 20thNight
30%5%9%15%22%20%
2088
21st to endNight
30%46%16%22%22%
2376
November1st to 10thNight
32%5%8%19%23%14%
2220
11th to 20thNight
29%5%8%20%22%16%
2417
21st to endNight
39%47%15%20%15%
2470
December1st to 10thNight
34%49%20%22%12%
2470
11th to 20thNight
41%35%11%23%17%
3037
21st to endNight
34%35%15%29%14%
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%14%33%26%5%
270
11th to 20thDay
24%14%31%23%8%
270
21st to endDay
19%20%34%22%5%
282
February1st to 10thDay
22%18%34%20%6%
240
11th to 20thDay
26%16%34%21%3
240
21st to endDay
29%18%34%19%
198
March1st to 10thDay
24%16%36%21%3
240
11th to 20thDay
21%19%33%23%5%
240
21st to endDay
17%19%42%17%6%
264
April1st to 10thDay
20%19%38%21%3
240
11th to 20thDay
16%18%36%23%7%
243
21st to endDay
17%15%41%20%8%
568
May1st to 10thDay
15%11%37%30%7%
603
11th to 20thDay
18%6%30%34%11%2
625
21st to endDay
17%6%29%32%14%2
679
June1st to 10thDay
7%216%44%25%6%
630
11th to 20thDay
7%118%51%20%3
630
21st to endDay
7%113%42%29%7%
630
July1st to 10thDay
7%39%38%33%10%
621
11th to 20thDay
35%39%45%9%
618
21st to endDay
31432%49%11%
684
August1st to 10thDay
3436%45%12%
626
11th to 20thDay
5%15%36%41%12%
457
21st to endDay
5%15%30%38%20%
405
September1st to 10thDay
9%1421%43%21%
270
11th to 20thDay
7%16%28%43%15%
270
21st to endDay
10%17%34%31%17%
270
October1st to 10thDay
5%113%39%34%7%
270
11th to 20thDay
10%5%23%32%25%4
270
21st to endDay
23%9%25%24%17%2
297
November1st to 10thDay
20%431%31%9%5%
270
11th to 20thDay
16%10%30%30%11%4
270
21st to endDay
23%17%32%18%8%1
270
December1st to 10thDay
16%7%35%29%10%4
270
11th to 20thDay
21%14%33%25%7%
270
21st to endDay
21%10%38%22%9%1
297
January1st to 10thNight
18%8%33%33%7%
950
11th to 20thNight
19%10%31%33%6%
950
21st to endNight
20%9%33%31%7%
930
February1st to 10thNight
22%11%33%29%5%
720
11th to 20thNight
22%12%37%28%3
704
21st to endNight
24%11%43%21%1
592
March1st to 10thNight
19%12%37%28%3
569
11th to 20thNight
17%9%35%34%4
540
21st to endNight
14%10%43%28%3
594
April1st to 10thNight
12%11%46%29%2
540
11th to 20thNight
17%11%41%27%3
533
21st to endNight
14%11%44%22%8%
540
May1st to 10thNight
13%11%43%29%5%
540
11th to 20thNight
10%7%36%34%13%1
531
21st to endNight
12%5%35%35%13%1
584
June1st to 10thNight
4223%47%23%1
540
11th to 20thNight
4230%51%12%1
540
21st to endNight
6%217%49%24%2
540
July1st to 10thNight
8%210%47%29%3
525
11th to 20thNight
49%55%30%2
522
21st to endNight
3111%51%32%3
591
August1st to 10thNight
26%55%32%4
537
11th to 20thNight
5%6%49%37%3
534
21st to endNight
5%16%44%38%5%
594
September1st to 10thNight
9%18%41%36%4
540
11th to 20thNight
11%27%40%36%3
540
21st to endNight
10%111%39%36%3
540
October1st to 10thNight
7%113%50%26%3
540
11th to 20thNight
14%323%39%19%2
648
21st to endNight
15%8%26%30%19%1
792
November1st to 10thNight
14%424%41%16%1
740
11th to 20thNight
11%7%27%40%14%1
897
21st to endNight
20%8%29%30%12%1
950
December1st to 10thNight
16%8%29%37%10%
950
11th to 20thNight
22%8%30%33%6%
950
21st to endNight
19%8%30%37%7%
1045
Page generated at 2024-01-24 08:37:28. Version ac07

Copyright 2024 Attilla Danko


Szabo Pecan Farm Clear Sky Chart |Charts Home