Gila Cliff Dwellings National Monument
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Gila Cliff Dwellings National Monument 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
63%
23489
33%
74246
24%
23439
73%
23439
46%
36028

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
60%
758
34%
2457
28%
756
72%
756
49%
1162
January11th to 20thNight
58%
736
35%
2392
28%
736
70%
736
48%
1109
January21st to endNight
53%
792
37%
2574
26%
792
69%
792
43%
1268
February1st to 10thNight
58%
720
35%
2340
28%
720
72%
720
53%
1024
February11th to 20thNight
45%
701
31%
2168
20%
700
59%
700
44%
1073
February21st to endNight
41%
592
39%
1649
19%
592
61%
592
48%
837
March1st to 10thNight
47%
720
39%
1980
20%
720
63%
720
48%
984
March11th to 20thNight
53%
720
36%
1980
19%
720
66%
720
52%
991
March21st to endNight
47%
792
37%
2178
16%
792
65%
792
51%
1076
April1st to 10thNight
50%
594
38%
1854
19%
594
70%
594
56%
778
April11th to 20thNight
45%
533
40%
1777
20%
533
71%
533
50%
716
April21st to endNight
50%
540
42%
1800
26%
540
73%
540
59%
694
May1st to 10thNight
55%
540
36%
1800
27%
540
70%
540
58%
724
May11th to 20thNight
62%
531
32%
1620
25%
531
71%
531
51%
765
May21st to endNight
59%
583
38%
1746
24%
582
73%
582
63%
735
June1st to 10thNight
69%
540
31%
1620
26%
540
72%
540
51%
774
June11th to 20thNight
70%
540
31%
1620
25%
540
76%
540
61%
713
June21st to endNight
75%
540
22%
1620
20%
540
76%
540
40%
886
July1st to 10thNight
75%
525
20%
1575
19%
525
75%
525
34%
933
July11th to 20thNight
80%
522
14%
1566
13%
522
80%
522
27%
987
July21st to endNight
75%
591
12%
1674
11%
558
75%
558
27%
1071
August1st to 10thNight
81%
537
14%
1602
13%
534
81%
534
32%
947
August11th to 20thNight
79%
534
20%
1756
22%
534
79%
534
26%
1091
August21st to endNight
79%
594
21%
1980
23%
594
80%
594
29%
1177
September1st to 10thNight
74%
540
24%
1800
27%
540
74%
540
30%
1052
September11th to 20thNight
82%
616
36%
1876
34%
616
84%
616
47%
962
September21st to endNight
77%
720
33%
2027
23%
720
82%
720
56%
992
October1st to 10thNight
72%
720
33%
2160
25%
720
77%
720
50%
1060
October11th to 20thNight
75%
720
42%
2160
30%
720
83%
720
65%
928
October21st to endNight
73%
792
44%
2376
31%
792
83%
792
67%
986
November1st to 10thNight
73%
740
44%
2220
32%
740
81%
740
63%
965
November11th to 20thNight
71%
760
43%
2280
31%
760
80%
760
62%
988
November21st to endNight
58%
760
39%
2303
27%
760
70%
760
47%
1112
December1st to 10thNight
61%
760
38%
2470
30%
760
70%
760
48%
1150
December11th to 20thNight
52%
759
32%
2922
25%
759
65%
759
35%
1476
December21st to endNight
51%
827
21%
4324
26%
817
62%
817
29%
1842

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
342443445%7%59%
75047
Night
331332445%7%64%
74768
TransparencyDay
24%5%8%15%27%20%
74773
Night
20%5%10%18%29%19%
74563
SeeingDay
9%14%24%27%18%7%
13390
Night
5%6%20%39%25%4
23505

By Month

Percentage Cloud Cover SW (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
26%1332445%7%63%
1708
11th to 20thDay
35%12223447%65%
1656
21st to endDay
45%23333346%63%
1782
February1st to 10thDay
15%13423445%68%
1620
11th to 20thDay
3423323347%65%
1679
21st to endDay
26%2222245%6%67%
1605
March1st to 10thDay
232432345%9%62%
1980
11th to 20thDay
341332445%6%65%
1980
21st to endDay
2212323447%69%
2178
April1st to 10thDay
121242335%7%71%
2106
11th to 20thDay
1312323335%72%
2131
21st to endDay
1212323347%73%
2160
May1st to 10thDay
1212323347%71%
2160
11th to 20thDay
22133345%5%6%65%
2271
21st to endDay
2211223335%76%
2530
June1st to 10thDay
2212325%5%48%66%
2340
11th to 20thDay
1223323346%72%
2340
21st to endDay
3425%6%5%6%6%6%7%51%
2340
July1st to 10thDay
6%5%27%7%5%7%7%7%10%37%
2340
11th to 20thDay
45%38%9%6%9%9%8%10%30%
2340
21st to endDay
8%7%37%8%6%8%8%8%10%27%
2545
August1st to 10thDay
7%6%37%8%6%8%6%9%9%32%
2328
11th to 20thDay
7%5%37%7%6%9%6%8%9%34%
2144
21st to endDay
6%427%9%6%7%7%6%9%38%
2376
September1st to 10thDay
9%5%38%7%36%5%6%8%41%
2160
11th to 20thDay
6%4145%45%5%5%8%54%
2080
21st to endDay
332442335%6%64%
1931
October1st to 10thDay
5%22443445%7%61%
1800
11th to 20thDay
5%21232332474%
1800
21st to endDay
2112212336%77%
1980
November1st to 10thDay
2212223336%74%
1859
11th to 20thDay
2212323436%72%
1900
21st to endDay
35%24334446%62%
1873
December1st to 10thDay
431332345%6%66%
1710
11th to 20thDay
46%36%6%34337%56%
2169
21st to endDay
25%2433445%6%61%
3146
January1st to 10thNight
25%2332335%9%64%
2457
11th to 20thNight
3413323246%69%
2392
21st to endNight
442332445%6%63%
2574
February1st to 10thNight
131232346%7%69%
2340
11th to 20thNight
4424323445%65%
2167
21st to endNight
1412224446%68%
1649
March1st to 10thNight
231332335%8%68%
1980
11th to 20thNight
3412323336%70%
1980
21st to endNight
231332335%6%70%
2178
April1st to 10thNight
111222335%7%73%
1854
11th to 20thNight
211222335%6%74%
1777
21st to endNight
121121235%7%77%
1800
May1st to 10thNight
1212213346%75%
1800
11th to 20thNight
221332345%7%68%
1620
21st to endNight
211221223479%
1746
June1st to 10thNight
221332445%7%65%
1620
11th to 20thNight
2213322346%72%
1620
21st to endNight
3225%5%45%5%7%9%53%
1620
July1st to 10thNight
4435%5%36%6%7%12%45%
1620
11th to 20thNight
2425%6%48%9%10%15%36%
1620
21st to endNight
45%25%7%47%7%9%13%36%
1773
August1st to 10thNight
2315%6%46%7%10%13%44%
1611
11th to 20thNight
3325%6%48%8%9%11%40%
1756
21st to endNight
4315%7%47%7%11%11%40%
1980
September1st to 10thNight
5%435%5%46%6%7%8%47%
1800
11th to 20thNight
5%3143345%6%6%61%
1876
21st to endNight
331332345%6%69%
2027
October1st to 10thNight
32123235%5%6%67%
2160
11th to 20thNight
221221223479%
2160
21st to endNight
211121223481%
2376
November1st to 10thNight
2212213346%75%
2220
11th to 20thNight
1212223346%75%
2280
21st to endNight
5%312323348%65%
2303
December1st to 10thNight
441332335%6%67%
2470
11th to 20thNight
3425%5%2445%8%57%
3041
21st to endNight
4424424447%61%
4521

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
23%27%17%35%17%
1709
11th to 20thDay
20%28%18%34%17%
1656
21st to endDay
25%25%16%34%17%
1782
February1st to 10thDay
20%29%16%27%26%
1620
11th to 20thDay
22%27%18%29%22%
1688
21st to endDay
20%2414%32%28%
1605
March1st to 10thDay
22%37%14%33%22%
1980
11th to 20thDay
21%36%13%34%23%
1980
21st to endDay
16%37%17%35%21%
2178
April1st to 10thDay
14%26%14%40%23%
2106
11th to 20thDay
15%2413%33%33%
2134
21st to endDay
13%25%16%38%25%
2160
May1st to 10thDay
14%35%13%34%32%
2160
11th to 20thDay
19%5%7%13%31%24%
2274
21st to endDay
12%25%11%33%37%
2530
June1st to 10thDay
17%5%5%13%31%30%
2340
11th to 20thDay
15%35%8%24%46%
2340
21st to endDay
30%6%9%12%20%21%
2340
July1st to 10thDay
37%10%13%13%13%13%
2276
11th to 20thDay
43%12%19%15%6%4
2271
21st to endDay
47%13%20%13%6%1
2404
August1st to 10thDay
43%11%16%16%11%3
2313
11th to 20thDay
43%11%14%16%13%4
2144
21st to endDay
39%12%13%16%17%3
2376
September1st to 10thDay
39%6%12%17%16%10%
2160
11th to 20thDay
28%6%8%18%27%14%
2080
21st to endDay
20%48%21%30%17%
1931
October1st to 10thDay
22%5%8%16%26%22%
1800
11th to 20thDay
16%2412%32%34%
1800
21st to endDay
12%35%17%38%25%
1980
November1st to 10thDay
14%35%21%33%24%
1859
11th to 20thDay
16%36%17%33%25%
1900
21st to endDay
25%36%15%30%20%
1873
December1st to 10thDay
20%28%20%32%18%
1710
11th to 20thDay
32%38%19%25%14%
2168
21st to endDay
22%39%15%31%18%
3146
January1st to 10thNight
20%310%18%34%15%
2457
11th to 20thNight
20%36%16%38%17%
2392
21st to endNight
24%37%16%36%14%
2574
February1st to 10thNight
16%310%20%30%22%
2340
11th to 20thNight
22%39%18%28%20%
2168
21st to endNight
19%45%15%30%26%
1649
March1st to 10thNight
18%38%17%33%22%
1980
11th to 20thNight
19%26%14%37%21%
1980
21st to endNight
17%36%20%37%17%
2178
April1st to 10thNight
12%36%20%40%20%
1854
11th to 20thNight
13%25%14%37%29%
1777
21st to endNight
9%35%18%42%22%
1800
May1st to 10thNight
12%26%14%36%30%
1800
11th to 20thNight
17%48%16%31%24%
1621
21st to endNight
11%25%14%31%37%
1746
June1st to 10thNight
18%46%14%30%28%
1620
11th to 20thNight
13%35%11%26%42%
1620
21st to endNight
27%6%11%12%21%23%
1620
July1st to 10thNight
29%9%16%20%12%14%
1575
11th to 20thNight
31%15%21%22%8%4
1566
21st to endNight
35%12%29%16%6%2
1674
August1st to 10thNight
27%12%26%18%12%4
1602
11th to 20thNight
33%13%19%17%13%5%
1756
21st to endNight
30%12%21%21%14%3
1980
September1st to 10thNight
32%9%14%19%16%10%
1800
11th to 20thNight
22%5%11%20%29%13%
1876
21st to endNight
16%5%10%19%35%15%
2027
October1st to 10thNight
18%6%10%18%29%20%
2160
11th to 20thNight
12%2417%33%32%
2160
21st to endNight
10%15%22%37%24%
2376
November1st to 10thNight
12%35%20%38%21%
2220
11th to 20thNight
13%36%22%30%27%
2280
21st to endNight
21%28%18%32%18%
2303
December1st to 10thNight
20%38%22%29%18%
2470
11th to 20thNight
27%310%18%30%12%
3041
21st to endNight
24%49%17%27%19%
4521

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
14%11%28%31%14%1
270
11th to 20thDay
13%13%24%29%16%5%
252
21st to endDay
9%12%27%33%17%3
264
February1st to 10thDay
7%16%24%30%18%5%
240
11th to 20thDay
15%20%28%30%7%
240
21st to endDay
20%32%24%18%5%1
323
March1st to 10thDay
17%26%32%18%7%
420
11th to 20thDay
17%21%31%20%8%2
420
21st to endDay
18%34%26%15%5%2
462
April1st to 10thDay
10%24%40%17%7%3
420
11th to 20thDay
15%30%32%15%8%1
412
21st to endDay
14%26%34%17%8%1
420
May1st to 10thDay
10%23%35%23%8%1
423
11th to 20thDay
6%18%35%22%15%5%
448
21st to endDay
7%20%39%22%11%2
485
June1st to 10thDay
413%33%30%16%4
450
11th to 20thDay
313%32%30%16%6%
450
21st to endDay
5%6%29%32%20%9%
450
July1st to 10thDay
7%410%36%31%13%
446
11th to 20thDay
6%4428%34%24%
444
21st to endDay
8%5%325%36%23%
487
August1st to 10thDay
7%36%31%34%18%
447
11th to 20thDay
7%310%31%35%14%
437
21st to endDay
6%48%33%32%17%
495
September1st to 10thDay
12%314%34%27%10%
450
11th to 20thDay
6%223%37%23%8%
450
21st to endDay
6%8%24%35%20%7%
401
October1st to 10thDay
7%12%21%28%25%8%
270
11th to 20thDay
9%9%20%34%21%8%
270
21st to endDay
7%9%23%29%22%9%
297
November1st to 10thDay
6%16%25%36%10%6%
270
11th to 20thDay
6%7%19%36%28%6%
270
21st to endDay
13%14%26%26%17%4
270
December1st to 10thDay
10%12%24%31%18%4
270
11th to 20thDay
10%16%23%35%13%3
270
21st to endDay
15%16%28%30%10%2
297
January1st to 10thNight
6%6%25%42%18%4
760
11th to 20thNight
7%7%24%42%15%4
736
21st to endNight
8%7%27%39%15%3
792
February1st to 10thNight
48%27%43%15%3
720
11th to 20thNight
8%10%33%38%10%1
704
21st to endNight
6%13%38%35%8%1
592
March1st to 10thNight
6%14%29%39%11%1
720
11th to 20thNight
6%9%29%37%18%2
720
21st to endNight
5%12%32%39%11%1
792
April1st to 10thNight
312%33%40%11%1
594
11th to 20thNight
416%31%37%11%1
533
21st to endNight
411%32%38%13%1
540
May1st to 10thNight
29%30%46%12%
540
11th to 20thNight
37%22%49%18%2
531
21st to endNight
37%27%47%16%1
584
June1st to 10thNight
3318%49%26%1
540
11th to 20thNight
3318%51%25%1
540
21st to endNight
3110%42%38%4
540
July1st to 10thNight
6%2333%47%10%
525
11th to 20thNight
31120%65%10%
522
21st to endNight
5%2218%59%14%
591
August1st to 10thNight
31116%63%17%
537
11th to 20thNight
41122%59%13%
534
21st to endNight
42324%58%9%
594
September1st to 10thNight
8%1432%50%5%
540
11th to 20thNight
6%15%41%41%5%
616
21st to endNight
4211%42%38%4
720
October1st to 10thNight
4414%49%26%3
720
11th to 20thNight
4317%51%23%3
720
21st to endNight
4416%44%26%6%
792
November1st to 10thNight
4416%49%23%5%
740
11th to 20thNight
3419%47%24%4
760
21st to endNight
9%8%21%37%20%4
760
December1st to 10thNight
7%6%21%44%18%3
760
11th to 20thNight
7%7%28%41%14%2
760
21st to endNight
8%8%28%40%13%2
836
Page generated at 2024-01-11 20:33:47. Version ac07

Copyright 2024 Attilla Danko


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