Puerto Peñasco
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Puerto Peñasco 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
80%
24478
27%
74364
24%
24435
83%
24435
29%
46187

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
72%
758
25%
2457
23%
756
78%
756
25%
1544
January11th to 20thNight
73%
738
26%
2398
21%
738
82%
738
23%
1551
January21st to endNight
65%
792
29%
2475
23%
792
75%
792
25%
1592
February1st to 10thNight
73%
720
27%
2160
25%
720
78%
720
27%
1382
February11th to 20thNight
68%
700
28%
2098
23%
700
77%
700
27%
1343
February21st to endNight
67%
592
27%
1776
23%
592
76%
592
28%
1115
March1st to 10thNight
64%
720
26%
2042
19%
720
73%
720
27%
1346
March11th to 20thNight
76%
720
30%
1980
26%
720
81%
720
32%
1251
March21st to endNight
75%
792
28%
2178
23%
792
79%
792
30%
1410
April1st to 10thNight
79%
720
26%
1980
20%
720
82%
720
33%
1244
April11th to 20thNight
75%
711
31%
1877
20%
711
81%
711
37%
1172
April21st to endNight
84%
581
35%
1661
29%
581
86%
581
36%
989
May1st to 10thNight
80%
540
30%
1620
23%
540
84%
540
34%
955
May11th to 20thNight
88%
531
34%
1594
30%
531
89%
531
35%
930
May21st to endNight
87%
582
33%
1746
26%
582
89%
582
36%
1010
June1st to 10thNight
90%
540
28%
1620
23%
540
91%
540
34%
960
June11th to 20thNight
92%
540
32%
1620
25%
540
93%
540
37%
929
June21st to endNight
93%
540
28%
1620
24%
540
93%
540
33%
968
July1st to 10thNight
93%
525
22%
1575
18%
525
93%
525
31%
962
July11th to 20thNight
89%
522
26%
1566
22%
522
89%
522
28%
1005
July21st to endNight
88%
591
22%
1674
18%
558
88%
558
23%
1151
August1st to 10thNight
91%
537
25%
1602
21%
534
91%
534
29%
1016
August11th to 20thNight
89%
702
25%
1770
19%
702
89%
702
31%
1187
August21st to endNight
91%
792
24%
2033
19%
792
91%
792
30%
1366
September1st to 10thNight
87%
720
25%
1980
23%
720
88%
720
31%
1272
September11th to 20thNight
89%
720
33%
1980
29%
720
90%
720
36%
1203
September21st to endNight
88%
720
29%
1980
25%
720
89%
720
34%
1231
October1st to 10thNight
84%
720
30%
1980
25%
720
87%
720
34%
1229
October11th to 20thNight
85%
720
35%
2071
31%
720
88%
720
36%
1228
October21st to endNight
84%
792
29%
2376
26%
792
88%
792
33%
1409
November1st to 10thNight
81%
740
27%
2234
25%
740
85%
740
28%
1422
November11th to 20thNight
81%
760
28%
2470
29%
760
84%
760
27%
1525
November21st to endNight
69%
760
25%
2470
23%
760
75%
760
23%
1619
December1st to 10thNight
71%
760
26%
2470
26%
760
75%
760
25%
1574
December11th to 20thNight
69%
758
25%
2924
25%
758
74%
758
19%
1933
December21st to endNight
66%
822
18%
4307
22%
817
71%
817
17%
2164

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
2212222346%75%
74913
Night
2212212346%74%
74902
TransparencyDay
8%35%29%18%27%
74640
Night
9%35%28%18%29%
74697
SeeingDay
3214%35%36%10%
14177
Night
3111%38%39%8%
24502

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
4212323346%70%
1708
11th to 20thDay
3214333245%71%
1656
21st to endDay
4212223335%72%
1876
February1st to 10thDay
1222223347%73%
1800
11th to 20thDay
4323323347%66%
1750
21st to endDay
221232335%7%69%
1480
March1st to 10thDay
322221346%7%69%
1916
11th to 20thDay
3212212346%74%
1980
21st to endDay
1212322325%77%
2178
April1st to 10thDay
1111212346%79%
1980
11th to 20thDay
211111235%82%
2027
21st to endDay
11121112486%
2297
May1st to 10thDay
11111112486%
2340
11th to 20thDay
1111123485%
2301
21st to endDay
1111294%
2530
June1st to 10thDay
211111235%84%
2340
11th to 20thDay
111112390%
2340
21st to endDay
211121232482%
2340
July1st to 10thDay
311221335%5%73%
2340
11th to 20thDay
321343446%9%61%
2340
21st to endDay
4224425%5%7%11%54%
2545
August1st to 10thDay
2212233447%69%
2328
11th to 20thDay
3113223347%70%
2128
21st to endDay
322323447%72%
2322
September1st to 10thDay
5%313222346%70%
1980
11th to 20thDay
21221122384%
1980
21st to endDay
111221112484%
1980
October1st to 10thDay
22111222483%
1980
11th to 20thDay
111111213486%
1886
21st to endDay
111211223482%
1980
November1st to 10thDay
212223226%79%
1840
11th to 20thDay
321222133477%
1710
21st to endDay
4312323346%70%
1710
December1st to 10thDay
3313434446%65%
1710
11th to 20thDay
432442446%8%60%
2169
21st to endDay
6%21232335%8%66%
3146
January1st to 10thNight
221332335%7%69%
2457
11th to 20thNight
421222235%6%70%
2398
21st to endNight
5%313323335%69%
2475
February1st to 10thNight
2213213346%71%
2160
11th to 20thNight
5%212323346%68%
2098
21st to endNight
3213222346%72%
1776
March1st to 10thNight
4213323347%67%
2042
11th to 20thNight
3212212336%77%
1980
21st to endNight
221222345%5%73%
2178
April1st to 10thNight
1111223336%77%
1980
11th to 20thNight
111111122386%
1877
21st to endNight
1111112487%
1661
May1st to 10thNight
1111123385%
1620
11th to 20thNight
1111122489%
1594
21st to endNight
1111112291%
1746
June1st to 10thNight
111112125%83%
1620
11th to 20thNight
111112290%
1620
21st to endNight
211111222482%
1620
July1st to 10thNight
111223449%73%
1620
11th to 20thNight
111242447%10%63%
1620
21st to endNight
2113435%5%7%13%55%
1773
August1st to 10thNight
111322346%8%71%
1611
11th to 20thNight
211232345%8%69%
1770
21st to endNight
2112213347%74%
2033
September1st to 10thNight
5%212112338%73%
1980
11th to 20thNight
311111112484%
1980
21st to endNight
211112335%81%
1980
October1st to 10thNight
211221223383%
1980
11th to 20thNight
111111225%84%
2071
21st to endNight
1111212235%83%
2376
November1st to 10thNight
2112212345%78%
2234
11th to 20thNight
2212312345%75%
2470
21st to endNight
331322345%6%68%
2470
December1st to 10thNight
3313313347%67%
2470
11th to 20thNight
5%425%423346%62%
3041
21st to endNight
4213323447%64%
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
9%38%38%21%21%
1709
11th to 20thDay
11%39%16%17%27%
1656
21st to endDay
11%36%112%22%19%
1876
February1st to 10thDay
10%35%28%19%27%
1800
11th to 20thDay
11%36%110%23%20%
1760
21st to endDay
9%35%19%21%24%
1480
March1st to 10thDay
11%35%17%21%25%
1916
11th to 20thDay
9%34%28%17%30%
1980
21st to endDay
9%34%26%20%29%
2178
April1st to 10thDay
6%34%16%22%31%
1980
11th to 20thDay
6%34%17%18%36%
2030
21st to endDay
434%1416%41%
2297
May1st to 10thDay
434%5%16%40%
2340
11th to 20thDay
434%314%44%
2304
21st to endDay
134%320%42%
2530
June1st to 10thDay
434%317%41%
2340
11th to 20thDay
234%212%50%
2340
21st to endDay
6%34%1313%43%
2340
July1st to 10thDay
9%37%39%15%28%
2276
11th to 20thDay
12%38%7%19%18%7%
2271
21st to endDay
14%38%11%15%14%7%
2404
August1st to 10thDay
11%36%6%14%16%18%
2313
11th to 20thDay
12%35%6%18%20%9%
2128
21st to endDay
12%37%6%15%16%13%
2322
September1st to 10thDay
10%36%6%12%17%19%
1980
11th to 20thDay
335%16%20%36%
1980
21st to endDay
5%35%28%22%29%
1980
October1st to 10thDay
5%35%28%22%27%
1980
11th to 20thDay
334%16%17%39%
1886
21st to endDay
435%19%15%36%
1980
November1st to 10thDay
7%39%17%19%26%
1840
11th to 20thDay
7%38%15%17%31%
1710
21st to endDay
10%38%17%19%24%
1710
December1st to 10thDay
11%39%7%20%23%
1710
11th to 20thDay
16%33%413%23%13%
2168
21st to endDay
12%25%325%23%11%
3146
January1st to 10thNight
8%38%27%17%27%
2457
11th to 20thNight
10%39%16%16%28%
2398
21st to endNight
11%36%210%18%22%
2475
February1st to 10thNight
11%35%17%16%30%
2160
11th to 20thNight
10%36%110%18%25%
2099
21st to endNight
9%35%28%19%28%
1776
March1st to 10thNight
13%35%5%20%27%
2042
11th to 20thNight
8%34%26%17%33%
1980
21st to endNight
10%34%27%19%28%
2178
April1st to 10thNight
7%34%15%23%30%
1980
11th to 20thNight
5%33%5%19%37%
1877
21st to endNight
334%318%41%
1661
May1st to 10thNight
5%34%5%15%41%
1620
11th to 20thNight
335%211%49%
1595
21st to endNight
235%313%47%
1746
June1st to 10thNight
5%34%315%43%
1620
11th to 20thNight
234%210%52%
1620
21st to endNight
5%35%1110%49%
1620
July1st to 10thNight
5%37%310%14%31%
1575
11th to 20thNight
9%37%417%22%11%
1566
21st to endNight
14%38%6%17%16%9%
1674
August1st to 10thNight
9%36%415%16%20%
1602
11th to 20thNight
10%36%7%16%23%8%
1770
21st to endNight
10%36%6%17%18%13%
2033
September1st to 10thNight
9%35%5%14%19%19%
1980
11th to 20thNight
434%420%37%
1980
21st to endNight
5%36%28%20%30%
1980
October1st to 10thNight
6%35%210%19%29%
1980
11th to 20thNight
334%16%17%38%
2071
21st to endNight
435%25%14%40%
2376
November1st to 10thNight
6%39%17%18%29%
2234
11th to 20thNight
7%38%5%15%34%
2470
21st to endNight
12%38%17%16%27%
2470
December1st to 10thNight
10%38%18%17%26%
2470
11th to 20thNight
19%32%39%20%17%
3041
21st to endNight
15%24%218%26%14%
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
6%217%41%29%6%
270
11th to 20thDay
6%413%34%33%10%
252
21st to endDay
2422%40%25%7%
358
February1st to 10thDay
3319%37%29%9%
420
11th to 20thDay
6%424%40%22%4
415
21st to endDay
37%28%42%16%4
346
March1st to 10thDay
3325%41%22%5%
420
11th to 20thDay
4322%34%24%13%
420
21st to endDay
1428%42%21%3
462
April1st to 10thDay
1122%41%25%10%
420
11th to 20thDay
1225%42%23%7%
412
21st to endDay
2121%35%30%10%
420
May1st to 10thDay
2320%35%31%9%
423
11th to 20thDay
1119%42%31%7%
448
21st to endDay
218%45%31%4
485
June1st to 10thDay
3211%44%34%7%
450
11th to 20thDay
119%40%39%10%
450
21st to endDay
25%32%50%11%
450
July1st to 10thDay
15%31%51%11%
446
11th to 20thDay
31223%58%14%
444
21st to endDay
5%321%56%15%
487
August1st to 10thDay
21228%53%15%
447
11th to 20thDay
31319%59%16%
437
21st to endDay
322%56%19%
495
September1st to 10thDay
9%28%27%42%12%
450
11th to 20thDay
315%35%44%13%
450
21st to endDay
219%34%39%15%
450
October1st to 10thDay
2111%36%41%10%
450
11th to 20thDay
2113%33%35%16%
356
21st to endDay
2114%25%41%18%
297
November1st to 10thDay
3113%32%37%13%
270
11th to 20thDay
2410%29%41%13%
270
21st to endDay
3222%36%27%10%
270
December1st to 10thDay
5%311%42%29%10%
270
11th to 20thDay
417%43%27%9%
270
21st to endDay
9%419%37%23%8%
297
January1st to 10thNight
3217%48%27%3
760
11th to 20thNight
4216%48%27%3
738
21st to endNight
5%321%43%24%3
792
February1st to 10thNight
3315%41%32%6%
720
11th to 20thNight
5%219%49%22%3
704
21st to endNight
4322%48%20%4
592
March1st to 10thNight
5%321%47%22%3
720
11th to 20thNight
3315%40%30%10%
720
21st to endNight
3214%48%29%5%
792
April1st to 10thNight
1115%45%34%4
720
11th to 20thNight
2218%46%29%4
711
21st to endNight
1212%47%34%5%
581
May1st to 10thNight
1116%40%35%6%
540
11th to 20thNight
118%38%42%10%
531
21st to endNight
119%43%40%5%
584
June1st to 10thNight
115%41%46%6%
540
11th to 20thNight
6%34%50%10%
540
21st to endNight
11226%59%12%
540
July1st to 10thNight
2222%58%17%
525
11th to 20thNight
1115%59%23%
522
21st to endNight
11115%62%20%
591
August1st to 10thNight
1115%64%18%
537
11th to 20thNight
1212%66%19%
702
21st to endNight
3217%58%20%
792
September1st to 10thNight
5%1322%54%15%
720
11th to 20thNight
41325%54%14%
720
21st to endNight
116%33%47%13%
720
October1st to 10thNight
219%37%45%6%
720
11th to 20thNight
1110%42%38%8%
720
21st to endNight
1111%37%42%8%
792
November1st to 10thNight
3111%42%37%6%
740
11th to 20thNight
2111%40%38%8%
760
21st to endNight
4318%41%28%6%
760
December1st to 10thNight
6%215%47%27%4
760
11th to 20thNight
5%317%50%23%2
760
21st to endNight
6%218%49%21%4
836
Page generated at 2024-01-12 05:31:47. Version ac07

Copyright 2024 Attilla Danko


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