Goochtown
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Goochtown clear sky chart from 2005-11-06 to 2024-01-15.

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
43%
23713
19%
74589
14%
23658
49%
23658
23%
49210

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
21%
760
15%
2459
8%
757
30%
757
15%
1736
January11th to 20thNight
20%
737
15%
2393
8%
737
29%
737
12%
1813
January21st to endNight
21%
792
18%
2574
9%
792
32%
792
18%
1750
February1st to 10thNight
20%
720
14%
2176
6%
720
28%
720
16%
1617
February11th to 20thNight
17%
703
15%
2099
6%
700
25%
700
16%
1517
February21st to endNight
15%
592
16%
1776
6%
592
24%
592
14%
1343
March1st to 10thNight
25%
720
19%
2144
9%
720
33%
720
20%
1463
March11th to 20thNight
25%
720
17%
1980
8%
720
32%
720
21%
1402
March21st to endNight
32%
792
14%
2178
8%
792
37%
792
19%
1572
April1st to 10thNight
36%
604
22%
1864
13%
604
47%
604
27%
1167
April11th to 20thNight
38%
533
23%
1765
16%
533
48%
533
25%
1117
April21st to endNight
37%
540
21%
1620
11%
540
46%
540
25%
1081
May1st to 10thNight
39%
540
16%
1620
10%
540
44%
540
21%
1106
May11th to 20thNight
50%
531
15%
1593
11%
531
53%
531
21%
1110
May21st to endNight
63%
583
17%
1745
14%
582
65%
582
28%
1099
June1st to 10thNight
64%
540
18%
1620
16%
540
66%
540
33%
982
June11th to 20thNight
69%
540
19%
1620
16%
540
72%
540
36%
937
June21st to endNight
67%
540
17%
1620
15%
540
69%
540
30%
1012
July1st to 10thNight
65%
525
14%
1575
14%
525
66%
525
27%
1009
July11th to 20thNight
73%
522
18%
1566
16%
522
74%
522
34%
943
July21st to endNight
70%
591
18%
1672
17%
558
73%
558
30%
1056
August1st to 10thNight
70%
537
21%
1600
20%
534
71%
534
32%
987
August11th to 20thNight
68%
534
19%
1645
19%
534
70%
534
29%
1033
August21st to endNight
75%
594
22%
1980
25%
594
75%
594
32%
1137
September1st to 10thNight
66%
643
22%
1903
20%
643
68%
643
31%
1180
September11th to 20thNight
64%
720
26%
1980
22%
720
66%
720
33%
1242
September21st to endNight
58%
720
30%
1980
22%
720
65%
720
38%
1173
October1st to 10thNight
60%
720
29%
1980
25%
720
64%
720
40%
1137
October11th to 20thNight
47%
720
26%
2101
21%
720
54%
720
31%
1301
October21st to endNight
39%
792
26%
2472
20%
792
49%
792
27%
1539
November1st to 10thNight
49%
740
28%
2406
25%
740
57%
740
31%
1385
November11th to 20thNight
36%
760
26%
2470
18%
760
48%
760
26%
1506
November21st to endNight
39%
760
23%
2470
18%
760
47%
760
23%
1593
December1st to 10thNight
28%
760
15%
2470
9%
760
36%
760
15%
1795
December11th to 20thNight
28%
759
19%
2984
13%
759
37%
759
15%
2038
December21st to endNight
24%
829
10%
4489
9%
817
33%
817
8%
3332

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
15%8%36%5%35%5%5%8%37%
74888
Night
14%8%36%5%345%5%7%40%
74896
TransparencyDay
45%6%11%21%14%2
74611
Night
44%6%10%21%16%3
74692
SeeingDay
19%10%24%23%16%8%
13608
Night
18%8%24%29%18%3
23722

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
18%11%47%5%25%45%7%31%
1706
11th to 20thDay
21%13%6%10%7%33345%25%
1656
21st to endDay
16%11%47%5%35%346%35%
1782
February1st to 10thDay
19%12%5%7%5%3445%6%30%
1782
11th to 20thDay
22%9%48%5%34446%30%
1748
21st to endDay
20%11%48%6%34445%31%
1480
March1st to 10thDay
19%10%35%5%35%45%6%37%
1814
11th to 20thDay
23%8%37%5%345%46%31%
1980
21st to endDay
17%9%38%6%35%5%5%7%32%
2178
April1st to 10thDay
13%7%36%5%345%6%8%41%
2110
11th to 20thDay
14%9%46%5%24447%41%
2142
21st to endDay
15%7%36%6%45%5%6%7%36%
2340
May1st to 10thDay
17%8%26%5%35%5%6%8%36%
2340
11th to 20thDay
16%8%47%6%35%5%46%35%
2301
21st to endDay
10%6%35%6%47%48%10%38%
2531
June1st to 10thDay
10%5%26%8%46%6%6%9%39%
2340
11th to 20thDay
7%436%6%46%5%7%10%43%
2340
21st to endDay
9%5%25%6%46%6%7%11%39%
2340
July1st to 10thDay
11%5%36%7%5%7%7%7%9%33%
2340
11th to 20thDay
10%5%27%6%47%6%8%10%35%
2340
21st to endDay
12%5%36%6%36%6%7%10%36%
2547
August1st to 10thDay
10%6%35%6%47%6%7%10%36%
2327
11th to 20thDay
11%7%36%6%46%7%7%10%33%
2252
21st to endDay
9%5%35%5%46%7%8%10%38%
2376
September1st to 10thDay
14%6%37%6%46%5%48%39%
2038
11th to 20thDay
13%5%25%43446%8%44%
1980
21st to endDay
15%425%43446%7%48%
1980
October1st to 10thDay
11%4244235%5%7%52%
1980
11th to 20thDay
14%5%25%433446%50%
1857
21st to endDay
20%7%25%423446%44%
1882
November1st to 10thDay
11%5%25%434347%52%
1672
11th to 20thDay
17%7%25%32445%7%44%
1710
21st to endDay
16%9%36%4245%35%41%
1710
December1st to 10thDay
22%11%46%5%44345%32%
1710
11th to 20thDay
16%12%37%6%35%5%5%6%32%
2153
21st to endDay
18%14%5%8%6%35%5%5%7%24%
3124
January1st to 10thNight
18%10%5%8%7%34446%32%
2459
11th to 20thNight
20%13%6%7%6%35%446%26%
2393
21st to endNight
17%9%5%7%5%345%5%6%35%
2574
February1st to 10thNight
20%10%5%8%6%35%5%46%29%
2176
11th to 20thNight
22%10%47%5%33345%33%
2098
21st to endNight
23%12%37%6%34445%29%
1776
March1st to 10thNight
16%8%36%5%35%5%5%5%38%
2144
11th to 20thNight
18%8%36%6%35%46%7%35%
1980
21st to endNight
16%9%47%5%45%45%6%34%
2178
April1st to 10thNight
12%6%35%435%6%5%7%45%
1864
11th to 20thNight
15%7%35%5%35%346%44%
1765
21st to endNight
17%7%36%5%3445%8%39%
1620
May1st to 10thNight
16%6%37%6%45%5%5%6%38%
1620
11th to 20thNight
15%6%25%6%46%6%6%8%36%
1592
21st to endNight
5%425%8%5%6%6%6%12%41%
1744
June1st to 10thNight
8%425%6%25%6%7%10%44%
1620
11th to 20thNight
5%3245%35%5%7%11%49%
1620
21st to endNight
7%5%25%5%35%7%8%13%41%
1620
July1st to 10thNight
9%6%35%5%36%6%8%8%41%
1620
11th to 20thNight
6%435%4345%7%11%47%
1620
21st to endNight
9%4246%45%7%8%10%41%
1771
August1st to 10thNight
7%426%5%345%6%10%46%
1611
11th to 20thNight
7%5%36%5%46%6%6%9%44%
1645
21st to endNight
7%4244346%8%9%48%
1980
September1st to 10thNight
11%5%245%25%5%7%7%47%
1903
11th to 20thNight
11%6%35%4345%6%8%47%
1980
21st to endNight
10%5%2442335%6%55%
1980
October1st to 10thNight
10%5%2442345%7%55%
1980
11th to 20thNight
16%5%25%5%3245%7%47%
2101
21st to endNight
16%7%35%424446%45%
2472
November1st to 10thNight
11%6%345%23445%52%
2406
11th to 20thNight
14%7%36%433346%46%
2470
21st to endNight
17%8%45%434436%42%
2470
December1st to 10thNight
21%12%48%434445%31%
2470
11th to 20thNight
18%9%49%5%34445%35%
3042
21st to endNight
16%13%5%9%8%5%7%6%5%6%21%
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
53%410%19%11%2
1707
11th to 20thDay
63%29%15%10%1
1656
21st to endDay
50%410%23%12%1
1782
February1st to 10thDay
55%5%8%19%12%2
1782
11th to 20thDay
56%5%7%21%10%2
1758
21st to endDay
56%410%14%12%5%
1480
March1st to 10thDay
48%5%8%21%17%2
1814
11th to 20thDay
54%5%10%18%10%3
1980
21st to endDay
51%7%11%20%10%2
2178
April1st to 10thDay
40%6%10%25%15%3
2110
11th to 20thDay
44%49%21%19%4
2142
21st to endDay
45%7%10%25%11%2
2340
May1st to 10thDay
46%6%12%25%10%1
2340
11th to 20thDay
49%7%11%21%11%1
2305
21st to endDay
40%10%16%22%11%2
2531
June1st to 10thDay
40%9%11%23%15%1
2340
11th to 20thDay
35%9%14%23%16%2
2340
21st to endDay
38%9%14%19%18%3
2340
July1st to 10thDay
43%10%14%18%13%2
2275
11th to 20thDay
41%10%16%18%12%3
2271
21st to endDay
41%9%14%22%12%2
2405
August1st to 10thDay
41%11%16%20%12%
2314
11th to 20thDay
43%10%13%20%13%1
2252
21st to endDay
36%10%13%24%13%3
2376
September1st to 10thDay
43%8%12%18%15%4
2038
11th to 20thDay
37%7%11%22%21%3
1980
21st to endDay
36%410%26%21%3
1980
October1st to 10thDay
30%6%8%25%26%4
1980
11th to 20thDay
37%47%22%25%4
1857
21st to endDay
42%47%26%18%4
1882
November1st to 10thDay
33%48%25%24%5%
1672
11th to 20thDay
40%47%25%18%5%
1710
21st to endDay
45%48%22%17%3
1710
December1st to 10thDay
56%48%20%10%1
1710
11th to 20thDay
51%5%10%19%13%2
2150
21st to endDay
58%5%11%19%6%1
3124
January1st to 10thNight
54%410%18%12%3
2459
11th to 20thNight
61%48%14%12%1
2393
21st to endNight
50%410%23%11%2
2574
February1st to 10thNight
57%410%18%10%1
2176
11th to 20thNight
55%48%19%12%3
2099
21st to endNight
59%5%8%13%12%4
1776
March1st to 10thNight
48%48%17%19%4
2144
11th to 20thNight
49%5%9%23%12%2
1980
21st to endNight
51%6%10%21%11%1
2178
April1st to 10thNight
37%7%10%23%19%3
1864
11th to 20thNight
41%5%8%19%21%6%
1765
21st to endNight
44%6%10%26%13%2
1620
May1st to 10thNight
47%6%10%24%10%3
1620
11th to 20thNight
43%11%11%20%13%1
1593
21st to endNight
34%11%15%25%13%2
1745
June1st to 10thNight
33%8%15%27%15%3
1620
11th to 20thNight
27%9%19%23%19%2
1620
21st to endNight
33%10%15%21%15%5%
1620
July1st to 10thNight
36%10%15%23%14%3
1575
11th to 20thNight
30%9%18%20%17%5%
1566
21st to endNight
33%11%16%24%14%1
1672
August1st to 10thNight
33%9%15%26%16%2
1600
11th to 20thNight
34%11%16%23%15%2
1645
21st to endNight
30%9%14%26%17%3
1980
September1st to 10thNight
34%9%15%21%16%6%
1903
11th to 20thNight
34%7%10%25%21%3
1980
21st to endNight
32%48%24%27%4
1980
October1st to 10thNight
29%5%11%22%27%6%
1980
11th to 20thNight
37%5%8%22%25%4
2101
21st to endNight
41%47%22%22%5%
2472
November1st to 10thNight
35%47%25%24%5%
2406
11th to 20thNight
40%47%19%24%7%
2470
21st to endNight
45%37%24%18%3
2470
December1st to 10thNight
56%5%8%19%10%2
2470
11th to 20thNight
52%47%20%14%2
3044
21st to endNight
60%6%10%15%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
24%18%37%15%5%1
270
11th to 20thDay
31%23%30%13%2
252
21st to endDay
26%25%35%12%2
264
February1st to 10thDay
25%21%39%10%4
240
11th to 20thDay
41%22%28%8%2
240
21st to endDay
38%19%31%11%1
198
March1st to 10thDay
29%20%37%13%2
254
11th to 20thDay
26%22%29%18%5%1
420
21st to endDay
28%15%31%20%6%
462
April1st to 10thDay
19%19%25%25%11%1
420
11th to 20thDay
20%16%27%21%12%3
412
21st to endDay
19%15%30%21%11%3
420
May1st to 10thDay
22%12%30%21%11%4
423
11th to 20thDay
17%10%28%25%14%7%
447
21st to endDay
14%7%16%29%21%13%
485
June1st to 10thDay
13%418%28%24%12%
450
11th to 20thDay
8%420%27%30%11%
450
21st to endDay
10%5%23%28%21%13%
450
July1st to 10thDay
12%213%25%23%25%
445
11th to 20thDay
10%316%26%27%18%
444
21st to endDay
13%313%27%27%16%
488
August1st to 10thDay
13%314%28%26%17%
446
11th to 20thDay
13%215%32%25%13%
439
21st to endDay
10%310%25%33%18%
495
September1st to 10thDay
14%311%24%30%18%
450
11th to 20thDay
14%312%24%31%15%
450
21st to endDay
16%5%16%29%24%9%
450
October1st to 10thDay
14%5%19%32%23%8%
450
11th to 20thDay
14%11%28%30%12%5%
450
21st to endDay
24%11%28%25%10%2
397
November1st to 10thDay
16%9%34%26%11%3
270
11th to 20thDay
20%15%38%21%6%
270
21st to endDay
23%15%32%20%9%1
270
December1st to 10thDay
28%20%29%17%5%1
270
11th to 20thDay
23%19%30%20%7%
270
21st to endDay
31%18%35%11%5%
297
January1st to 10thNight
24%16%32%22%5%
760
11th to 20thNight
28%18%29%21%4
737
21st to endNight
21%15%39%23%2
792
February1st to 10thNight
25%14%35%23%3
720
11th to 20thNight
29%15%36%19%2
703
21st to endNight
30%15%37%17%2
592
March1st to 10thNight
22%14%34%25%4
720
11th to 20thNight
23%13%35%22%7%1
720
21st to endNight
21%13%29%30%7%
792
April1st to 10thNight
16%10%33%30%9%1
604
11th to 20thNight
18%10%31%27%13%1
533
21st to endNight
19%6%33%30%11%1
540
May1st to 10thNight
17%7%28%31%15%2
540
11th to 20thNight
15%5%22%34%21%3
531
21st to endNight
7%317%37%31%6%
584
June1st to 10thNight
10%213%44%27%4
540
11th to 20thNight
7%115%38%33%5%
540
21st to endNight
9%214%42%30%3
540
July1st to 10thNight
11%111%30%38%8%
525
11th to 20thNight
7%18%31%45%7%
522
21st to endNight
10%28%33%41%6%
591
August1st to 10thNight
9%18%31%45%6%
537
11th to 20thNight
8%211%36%37%6%
534
21st to endNight
8%17%33%41%10%
594
September1st to 10thNight
12%211%31%39%6%
643
11th to 20thNight
12%313%28%38%6%
720
21st to endNight
13%318%31%31%4
720
October1st to 10thNight
13%5%17%29%31%5%
720
11th to 20thNight
18%7%23%33%18%2
720
21st to endNight
18%9%30%27%14%2
792
November1st to 10thNight
14%7%24%36%17%2
740
11th to 20thNight
18%10%33%30%8%1
760
21st to endNight
22%10%25%32%10%1
760
December1st to 10thNight
28%12%28%27%6%
760
11th to 20thNight
24%11%32%27%6%1
760
21st to endNight
27%15%27%28%3
836
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