Hutto Lake Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Hutto Lake Park clear sky chart from 2005-11-06 to 2024-01-22.

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
49%
23825
25%
74397
18%
23770
57%
23770
32%
43307

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
30%
2458
13%
946
47%
946
37%
1487
January11th to 20thNight
36%
950
28%
2470
12%
950
45%
950
33%
1546
January21st to endNight
33%
950
29%
2550
11%
950
45%
950
31%
1615
February1st to 10thNight
30%
720
26%
2160
10%
720
43%
720
26%
1340
February11th to 20thNight
26%
704
23%
2098
9%
700
37%
700
27%
1299
February21st to endNight
21%
584
26%
1768
7%
584
36%
584
23%
1115
March1st to 10thNight
28%
540
24%
1980
12%
540
42%
540
21%
1212
March11th to 20thNight
33%
540
22%
1980
15%
540
42%
540
21%
1216
March21st to endNight
30%
594
25%
2178
14%
594
45%
594
26%
1234
April1st to 10thNight
31%
540
23%
1980
13%
540
47%
540
24%
1155
April11th to 20thNight
28%
533
22%
1945
13%
533
43%
533
23%
1170
April21st to endNight
30%
540
28%
1670
14%
540
48%
540
30%
1006
May1st to 10thNight
33%
540
23%
1620
16%
540
44%
540
27%
1017
May11th to 20thNight
46%
531
22%
1594
20%
531
53%
531
31%
978
May21st to endNight
49%
582
22%
1745
17%
582
59%
582
32%
1054
June1st to 10thNight
70%
540
23%
1620
24%
540
75%
540
46%
837
June11th to 20thNight
63%
540
23%
1620
23%
540
70%
540
46%
847
June21st to endNight
70%
540
23%
1620
26%
540
74%
540
37%
946
July1st to 10thNight
74%
525
18%
1575
20%
525
76%
525
36%
922
July11th to 20thNight
82%
522
27%
1566
30%
522
85%
522
51%
774
July21st to endNight
81%
591
26%
1673
28%
558
85%
558
51%
835
August1st to 10thNight
88%
537
29%
1601
31%
534
90%
534
63%
714
August11th to 20thNight
78%
534
25%
1690
29%
534
79%
534
37%
944
August21st to endNight
80%
594
20%
2105
25%
594
81%
594
35%
1142
September1st to 10thNight
74%
540
23%
1980
26%
540
76%
540
33%
1084
September11th to 20thNight
71%
540
21%
1980
25%
540
72%
540
27%
1177
September21st to endNight
73%
540
27%
1980
29%
540
75%
540
35%
1011
October1st to 10thNight
75%
540
35%
1980
36%
540
77%
540
41%
946
October11th to 20thNight
56%
682
32%
2122
21%
682
63%
682
36%
1205
October21st to endNight
50%
792
32%
2376
20%
792
57%
792
37%
1333
November1st to 10thNight
55%
740
29%
2220
20%
740
60%
740
34%
1311
November11th to 20thNight
49%
845
27%
2365
15%
845
56%
845
37%
1408
November21st to endNight
38%
950
26%
2470
13%
950
46%
950
29%
1614
December1st to 10thNight
41%
950
30%
2470
15%
950
49%
950
34%
1564
December11th to 20thNight
34%
948
26%
2880
11%
948
42%
948
25%
1855
December21st to endNight
38%
1039
17%
4308
13%
1026
46%
1026
22%
2394

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%5%25%43445%7%48%
74977
Night
12%5%2442345%7%52%
74984
TransparencyDay
36%6%10%20%19%9%
74702
Night
33%5%11%20%20%11%
74779
SeeingDay
12%6%20%28%25%8%
13784
Night
14%7%25%36%17%1
23837

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
15%5%24424346%53%
1707
11th to 20thDay
19%5%2332235%6%49%
1710
21st to endDay
17%434323336%51%
1855
February1st to 10thDay
19%7%35%423335%46%
1800
11th to 20thDay
19%7%25%32335%5%45%
1749
21st to endDay
19%7%2432333448%
1485
March1st to 10thDay
19%8%37%333446%40%
1980
11th to 20thDay
17%7%35%434445%45%
1980
21st to endDay
15%5%2442335%6%49%
2178
April1st to 10thDay
16%8%35%5%3445%5%42%
1980
11th to 20thDay
16%6%36%6%2445%6%42%
1961
21st to endDay
16%6%25%42445%6%47%
2286
May1st to 10thDay
14%6%36%5%346%5%6%41%
2340
11th to 20thDay
13%7%35%6%46%5%5%6%39%
2302
21st to endDay
14%7%36%7%46%6%6%9%33%
2531
June1st to 10thDay
5%425%5%46%5%6%8%50%
2340
11th to 20thDay
7%42445%45%6%10%49%
2340
21st to endDay
6%6%36%6%46%7%8%10%39%
2340
July1st to 10thDay
8%5%47%7%46%6%6%9%40%
2340
11th to 20thDay
5%314436%6%6%11%52%
2340
21st to endDay
5%324435%5%7%12%51%
2546
August1st to 10thDay
221332445%10%64%
2328
11th to 20thDay
6%324435%5%6%9%53%
2207
21st to endDay
5%3146%46%7%8%10%46%
2250
September1st to 10thDay
8%436%6%45%5%6%8%46%
1980
11th to 20thDay
11%5%25%6%45%47%8%43%
1980
21st to endDay
7%415%5%35%5%5%8%52%
1980
October1st to 10thDay
7%424434446%59%
1980
11th to 20thDay
13%5%25%424346%54%
1818
21st to endDay
12%424323435%59%
1980
November1st to 10thDay
13%7%35%42345%6%48%
1858
11th to 20thDay
11%6%25%434446%52%
1810
21st to endDay
16%7%25%433446%47%
1710
December1st to 10thDay
14%7%24434447%48%
1710
11th to 20thDay
17%7%35%42445%5%44%
2161
21st to endDay
16%6%2431344454%
3135
January1st to 10thNight
17%5%13212336%55%
2458
11th to 20thNight
17%6%23323345%53%
2470
21st to endNight
16%5%345%23345%50%
2550
February1st to 10thNight
19%6%34323335%49%
2160
11th to 20thNight
20%6%2432333450%
2098
21st to endNight
21%6%24323445%46%
1768
March1st to 10thNight
17%5%25%435%446%44%
1980
11th to 20thNight
17%7%35%434446%44%
1980
21st to endNight
14%6%35%323447%50%
2178
April1st to 10thNight
13%6%2443345%8%47%
1980
11th to 20thNight
17%6%34424446%45%
1945
21st to endNight
14%5%35%423447%49%
1670
May1st to 10thNight
12%6%35%4345%5%8%45%
1620
11th to 20thNight
12%5%245%35%45%8%48%
1593
21st to endNight
11%6%15%3245%5%10%47%
1745
June1st to 10thNight
431333346%10%59%
1620
11th to 20thNight
43233245%5%11%58%
1620
21st to endNight
6%3145%3447%10%52%
1620
July1st to 10thNight
7%4245%35%6%7%11%48%
1620
11th to 20thNight
311332446%11%62%
1620
21st to endNight
32223235%6%12%58%
1772
August1st to 10thNight
1221246%10%71%
1611
11th to 20thNight
5%4245%245%6%10%54%
1690
21st to endNight
4324435%6%8%10%51%
2105
September1st to 10thNight
7%425%5%25%45%8%53%
1980
11th to 20thNight
10%5%36%5%3446%7%47%
1980
21st to endNight
8%3134345%6%8%54%
1980
October1st to 10thNight
6%213433346%63%
1980
11th to 20thNight
12%4235%23446%56%
2122
21st to endNight
14%42332233360%
2376
November1st to 10thNight
13%5%24423335%54%
2220
11th to 20thNight
10%5%34423445%55%
2365
21st to endNight
18%6%24434336%47%
2470
December1st to 10thNight
13%7%34423346%50%
2470
11th to 20thNight
15%9%35%423345%47%
3036
21st to endNight
19%6%2322233454%
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
34%45%21%23%13%
1708
11th to 20thDay
37%37%16%23%13%
1710
21st to endDay
37%45%14%25%15%
1855
February1st to 10thDay
43%46%12%22%14%
1800
11th to 20thDay
42%38%17%18%11%
1759
21st to endDay
41%45%17%18%15%
1485
March1st to 10thDay
46%48%12%20%9%
1980
11th to 20thDay
43%5%6%13%20%13%
1980
21st to endDay
37%5%9%17%21%11%
2178
April1st to 10thDay
43%5%8%17%15%11%
1980
11th to 20thDay
43%5%7%15%19%11%
1961
21st to endDay
39%5%6%20%21%9%
2286
May1st to 10thDay
43%6%8%16%18%8%
2340
11th to 20thDay
43%7%9%19%17%4
2306
21st to endDay
46%8%11%19%14%2
2531
June1st to 10thDay
30%7%13%26%20%4
2340
11th to 20thDay
31%6%12%28%17%5%
2340
21st to endDay
39%8%11%23%16%3
2340
July1st to 10thDay
38%9%16%25%11%1
2276
11th to 20thDay
25%8%19%25%22%2
2271
21st to endDay
22%9%21%33%13%1
2405
August1st to 10thDay
17%6%17%38%21%2
2314
11th to 20thDay
26%8%17%31%13%5%
2207
21st to endDay
29%10%17%26%14%4
2250
September1st to 10thDay
35%8%11%22%16%9%
1980
11th to 20thDay
39%8%13%18%17%5%
1980
21st to endDay
29%9%10%21%19%13%
1980
October1st to 10thDay
26%5%11%22%23%12%
1980
11th to 20thDay
33%5%7%16%22%17%
1818
21st to endDay
29%36%15%27%20%
1980
November1st to 10thDay
38%5%9%18%21%10%
1858
11th to 20thDay
35%47%19%21%14%
1810
21st to endDay
41%46%16%20%13%
1710
December1st to 10thDay
38%410%18%22%8%
1710
11th to 20thDay
42%5%6%13%22%12%
2159
21st to endDay
36%36%14%28%13%
3135
January1st to 10thNight
33%35%19%24%17%
2458
11th to 20thNight
36%36%17%24%15%
2470
21st to endNight
38%3414%22%18%
2550
February1st to 10thNight
40%46%13%20%17%
2160
11th to 20thNight
40%36%16%20%14%
2098
21st to endNight
42%46%14%17%17%
1768
March1st to 10thNight
42%5%8%15%20%10%
1980
11th to 20thNight
43%49%11%21%12%
1980
21st to endNight
35%5%10%17%20%13%
2178
April1st to 10thNight
37%6%9%18%17%13%
1980
11th to 20thNight
39%6%10%15%17%14%
1945
21st to endNight
37%410%20%19%9%
1670
May1st to 10thNight
38%7%10%19%18%8%
1620
11th to 20thNight
34%8%11%25%18%4
1594
21st to endNight
33%7%15%29%15%1
1746
June1st to 10thNight
20%7%17%29%23%4
1620
11th to 20thNight
21%7%16%30%20%6%
1620
21st to endNight
27%10%14%29%17%3
1620
July1st to 10thNight
28%10%21%29%11%1
1575
11th to 20thNight
17%7%24%32%20%1
1566
21st to endNight
17%7%25%39%11%
1673
August1st to 10thNight
10%6%24%37%21%2
1601
11th to 20thNight
26%9%20%29%13%3
1690
21st to endNight
25%10%20%29%12%4
2105
September1st to 10thNight
29%7%15%26%16%7%
1980
11th to 20thNight
35%8%14%23%14%6%
1980
21st to endNight
27%6%14%22%18%12%
1980
October1st to 10thNight
23%5%10%26%22%14%
1980
11th to 20thNight
31%5%8%16%21%20%
2122
21st to endNight
29%5%6%16%22%22%
2376
November1st to 10thNight
33%5%8%18%22%13%
2220
11th to 20thNight
32%48%19%22%15%
2365
21st to endNight
41%47%15%18%15%
2470
December1st to 10thNight
37%48%21%19%11%
2470
11th to 20thNight
41%46%12%22%16%
3037
21st to endNight
36%4414%29%13%
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
19%11%36%26%7%1
270
11th to 20thDay
24%11%30%26%8%1
270
21st to endDay
18%14%37%23%7%
267
February1st to 10thDay
24%12%37%19%8%
240
11th to 20thDay
24%17%33%20%5%1
240
21st to endDay
27%16%35%20%2
198
March1st to 10thDay
21%15%36%20%7%1
240
11th to 20thDay
21%16%32%23%7%1
240
21st to endDay
17%13%38%25%7%
264
April1st to 10thDay
23%16%38%18%42
240
11th to 20thDay
17%18%31%24%10%
239
21st to endDay
19%11%36%24%9%1
546
May1st to 10thDay
15%10%35%29%11%
603
11th to 20thDay
17%6%28%31%14%3
625
21st to endDay
15%6%22%35%19%3
679
June1st to 10thDay
7%212%41%32%8%
630
11th to 20thDay
6%114%48%26%5%
630
21st to endDay
6%212%34%36%11%
630
July1st to 10thDay
5%47%35%37%13%
621
11th to 20thDay
215%31%50%11%
618
21st to endDay
41428%51%14%
684
August1st to 10thDay
21326%51%16%
626
11th to 20thDay
6%229%46%17%
521
21st to endDay
5%16%17%39%31%
369
September1st to 10thDay
8%1117%41%31%
270
11th to 20thDay
6%26%21%41%24%
270
21st to endDay
8%26%23%38%23%
270
October1st to 10thDay
4213%27%41%13%
270
11th to 20thDay
12%323%29%26%7%
270
21st to endDay
18%13%22%22%20%4
297
November1st to 10thDay
20%420%35%16%4
270
11th to 20thDay
17%7%27%29%16%4
270
21st to endDay
20%14%30%22%11%1
270
December1st to 10thDay
15%7%33%28%13%4
270
11th to 20thDay
21%12%33%22%12%
270
21st to endDay
21%10%34%25%7%2
297
January1st to 10thNight
20%8%31%32%8%
950
11th to 20thNight
21%9%30%32%7%
950
21st to endNight
19%10%33%31%7%
950
February1st to 10thNight
24%10%32%27%7%
720
11th to 20thNight
24%11%36%26%3
704
21st to endNight
25%14%38%19%3
584
March1st to 10thNight
20%11%37%28%4
540
11th to 20thNight
20%11%33%32%5%
540
21st to endNight
14%13%41%27%4
594
April1st to 10thNight
14%12%40%32%2
540
11th to 20thNight
20%9%40%26%4
533
21st to endNight
14%10%43%25%8%1
540
May1st to 10thNight
13%11%41%29%7%
540
11th to 20thNight
12%6%32%37%12%1
531
21st to endNight
12%6%30%37%15%1
584
June1st to 10thNight
5%318%47%26%2
540
11th to 20thNight
6%126%49%16%1
540
21st to endNight
5%314%46%29%4
540
July1st to 10thNight
6%29%48%30%5%
525
11th to 20thNight
418%53%32%2
522
21st to endNight
48%47%38%3
591
August1st to 10thNight
16%54%36%4
537
11th to 20thNight
6%15%49%34%4
534
21st to endNight
5%1440%45%6%
594
September1st to 10thNight
7%18%39%41%5%
540
11th to 20thNight
11%15%36%44%4
540
21st to endNight
10%110%36%39%4
540
October1st to 10thNight
5%111%48%29%5%
540
11th to 20thNight
13%422%39%21%2
682
21st to endNight
15%7%26%29%21%2
792
November1st to 10thNight
13%422%40%20%1
740
11th to 20thNight
14%7%26%37%15%1
845
21st to endNight
22%8%28%29%12%1
950
December1st to 10thNight
18%7%30%33%11%1
950
11th to 20thNight
22%10%29%32%6%1
950
21st to endNight
20%9%30%34%8%
1045
Page generated at 2024-01-19 08:28:36. Version ac07

Copyright 2024 Attilla Danko


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