Pauma Valley
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Pauma Valley clear sky chart from 2005-11-06 to 2024-02-20.

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
72%
25080
33%
79425
29%
24988
76%
24988
44%
41350

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
55%
752
36%
3986
25%
736
64%
736
28%
1661
January11th to 20thNight
59%
750
35%
3849
31%
740
68%
740
26%
1872
January21st to endNight
56%
827
24%
3958
27%
814
67%
814
22%
2301
February1st to 10thNight
60%
760
34%
2280
31%
760
67%
760
41%
1237
February11th to 20thNight
56%
738
32%
2211
29%
738
63%
738
36%
1260
February21st to endNight
56%
592
29%
1776
29%
592
62%
592
32%
1074
March1st to 10thNight
56%
720
24%
2160
24%
720
61%
720
32%
1305
March11th to 20thNight
66%
720
28%
2071
28%
720
69%
720
40%
1172
March21st to endNight
62%
792
27%
2066
20%
792
66%
792
40%
1242
April1st to 10thNight
64%
720
28%
1800
21%
720
65%
720
41%
1100
April11th to 20thNight
64%
711
30%
1779
19%
711
66%
711
44%
1064
April21st to endNight
70%
720
31%
1800
19%
720
72%
720
45%
1067
May1st to 10thNight
69%
599
29%
1679
21%
599
70%
599
41%
967
May11th to 20thNight
71%
531
29%
1595
22%
531
72%
531
40%
895
May21st to endNight
69%
582
29%
1746
23%
582
70%
582
39%
988
June1st to 10thNight
78%
540
33%
1620
27%
540
79%
540
51%
815
June11th to 20thNight
84%
540
35%
1620
30%
540
85%
540
61%
730
June21st to endNight
88%
540
36%
1620
32%
540
88%
540
68%
691
July1st to 10thNight
95%
525
35%
1575
29%
525
95%
525
70%
654
July11th to 20thNight
94%
522
36%
1566
31%
522
94%
522
68%
657
July21st to endNight
90%
679
33%
1758
24%
642
90%
642
60%
854
August1st to 10thNight
93%
716
37%
1780
24%
712
93%
712
74%
837
August11th to 20thNight
95%
712
42%
1780
27%
712
95%
712
78%
821
August21st to endNight
93%
792
44%
1980
32%
792
93%
792
74%
935
September1st to 10thNight
89%
720
42%
1818
33%
720
90%
720
66%
902
September11th to 20thNight
89%
720
43%
1980
40%
720
90%
720
69%
895
September21st to endNight
84%
720
44%
1980
41%
720
87%
720
66%
906
October1st to 10thNight
79%
720
37%
1980
35%
720
81%
720
54%
1006
October11th to 20thNight
77%
720
42%
1980
37%
720
81%
720
55%
999
October21st to endNight
73%
792
39%
2464
38%
792
80%
792
51%
1167
November1st to 10thNight
74%
740
36%
2405
38%
740
78%
740
50%
1122
November11th to 20thNight
71%
760
37%
2470
37%
760
77%
760
49%
1154
November21st to endNight
61%
760
33%
2470
32%
760
68%
760
38%
1317
December1st to 10thNight
61%
760
32%
2470
32%
760
67%
760
38%
1314
December11th to 20thNight
54%
760
29%
2946
28%
759
62%
759
26%
1752
December21st to endNight
56%
828
19%
4407
29%
817
63%
817
20%
2617

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
6%413323346%65%
78980
Night
6%5%23323347%61%
80286
TransparencyDay
22%3416%27%27%
78713
Night
26%3415%24%28%
80076
SeeingDay
10%6%28%36%15%5%
14703
Night
8%211%35%35%9%
25121

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
9%5%23322335%64%
2858
11th to 20thDay
8%5%2332445%8%56%
3002
21st to endDay
14%7%2343445%8%47%
3498
February1st to 10thDay
12%6%23323345%57%
1900
11th to 20thDay
10%6%2232345%7%54%
1841
21st to endDay
13%8%25%333446%49%
1480
March1st to 10thDay
11%5%245%35%5%5%8%48%
1800
11th to 20thDay
9%5%34323347%55%
1887
21st to endDay
6%6%1432345%7%58%
2286
April1st to 10thDay
10%5%2442445%8%54%
2160
11th to 20thDay
45%2322445%5%64%
2129
21st to endDay
7%5%13212347%65%
2160
May1st to 10thDay
8%5%2432335%7%59%
2281
11th to 20thDay
3422213348%68%
2301
21st to endDay
5%42332345%6%63%
2530
June1st to 10thDay
3312222336%72%
2340
11th to 20thDay
1212212225%79%
2340
21st to endDay
111221222482%
2340
July1st to 10thDay
1112212346%77%
2340
11th to 20thDay
21222345%7%73%
2340
21st to endDay
221332445%8%66%
2453
August1st to 10thDay
2111122335%79%
2149
11th to 20thDay
112211236%81%
2122
21st to endDay
111122234478%
2376
September1st to 10thDay
2112212335%77%
2142
11th to 20thDay
21111112485%
1980
21st to endDay
321221233478%
1980
October1st to 10thDay
5%422323345%67%
1980
11th to 20thDay
5%32221322472%
1980
21st to endDay
4313212335%73%
1886
November1st to 10thDay
6%312223246%68%
1674
11th to 20thDay
5%313323335%68%
1710
21st to endDay
8%5%2422445%8%56%
1710
December1st to 10thDay
8%6%2342435%7%56%
1710
11th to 20thDay
15%6%25%435%46%6%44%
2169
21st to endDay
12%9%26%6%45%446%42%
3146
January1st to 10thNight
8%6%23323335%62%
4097
11th to 20thNight
7%7%2443345%8%52%
3957
21st to endNight
15%9%34423446%47%
4180
February1st to 10thNight
11%6%23213345%58%
2280
11th to 20thNight
9%7%245%23335%56%
2211
21st to endNight
12%9%33424445%50%
1776
March1st to 10thNight
10%9%35%424348%46%
2160
11th to 20thNight
11%7%2332346%7%53%
2071
21st to endNight
8%7%24424448%52%
2066
April1st to 10thNight
8%8%34423448%52%
1800
11th to 20thNight
6%8%35%312335%59%
1779
21st to endNight
7%7%24324447%58%
1800
May1st to 10thNight
5%7%25%42435%8%56%
1679
11th to 20thNight
37%24334448%57%
1594
21st to endNight
48%35%322347%58%
1746
June1st to 10thNight
142332335%8%66%
1620
11th to 20thNight
1313311246%75%
1620
21st to endNight
2211211246%79%
1620
July1st to 10thNight
111212237%80%
1620
11th to 20thNight
11123448%75%
1620
21st to endNight
212231335%10%67%
1861
August1st to 10thNight
2112212346%78%
1790
11th to 20thNight
1111112337%80%
1780
21st to endNight
1111112327%79%
1980
September1st to 10thNight
2112212337%75%
1818
11th to 20thNight
2212212125%81%
1980
21st to endNight
2312212225%79%
1980
October1st to 10thNight
5%323323247%67%
1980
11th to 20thNight
5%413212236%71%
1980
21st to endNight
4413213345%69%
2464
November1st to 10thNight
5%413412336%68%
2405
11th to 20thNight
45%13422336%67%
2470
21st to endNight
7%6%244245%5%7%54%
2470
December1st to 10thNight
9%5%2442445%7%54%
2470
11th to 20thNight
13%9%25%42446%7%45%
3041
21st to endNight
10%10%36%5%35%45%6%44%
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
24%3419%31%18%
2859
11th to 20thDay
28%39%25%20%15%
3002
21st to endDay
36%46%12%25%17%
3498
February1st to 10thDay
32%2313%22%28%
1900
11th to 20thDay
30%3415%27%21%
1851
21st to endDay
38%25%15%20%20%
1480
March1st to 10thDay
34%35%18%21%19%
1800
11th to 20thDay
30%26%18%26%18%
1887
21st to endDay
27%48%24%24%13%
2286
April1st to 10thDay
29%37%26%24%12%
2160
11th to 20thDay
23%35%21%28%19%
2132
21st to endDay
21%26%24%34%13%
2160
May1st to 10thDay
28%36%18%28%18%
2281
11th to 20thDay
19%3425%35%15%
2304
21st to endDay
23%46%25%32%10%
2530
June1st to 10thDay
17%2321%35%21%
2340
11th to 20thDay
12%2212%31%41%
2340
21st to endDay
10%225%24%57%
2340
July1st to 10thDay
11%329%24%52%
2276
11th to 20thDay
12%36%21%28%30%
2271
21st to endDay
16%39%23%30%19%
2317
August1st to 10thDay
10%2313%30%42%
2135
11th to 20thDay
8%2216%30%41%
2122
21st to endDay
11%3211%33%41%
2376
September1st to 10thDay
12%238%35%40%
2142
11th to 20thDay
9%117%37%44%
1980
21st to endDay
13%2111%33%40%
1980
October1st to 10thDay
20%3218%25%33%
1980
11th to 20thDay
19%2210%27%39%
1980
21st to endDay
17%3212%23%44%
1886
November1st to 10thDay
19%2415%23%36%
1674
11th to 20thDay
20%3412%22%40%
1710
21st to endDay
27%3412%22%32%
1710
December1st to 10thDay
28%26%17%17%30%
1710
11th to 20thDay
39%48%11%19%18%
2168
21st to endDay
43%4419%17%12%
3146
January1st to 10thNight
26%35%15%29%23%
4097
11th to 20thNight
31%38%22%19%16%
3957
21st to endNight
39%35%9%25%18%
4180
February1st to 10thNight
30%2414%21%29%
2280
11th to 20thNight
34%2412%22%26%
2212
21st to endNight
38%2315%22%21%
1776
March1st to 10thNight
38%36%16%17%20%
2160
11th to 20thNight
31%36%17%24%20%
2071
21st to endNight
32%38%20%22%15%
2066
April1st to 10thNight
33%37%23%20%15%
1800
11th to 20thNight
31%25%19%23%21%
1779
21st to endNight
29%35%20%26%17%
1800
May1st to 10thNight
30%36%18%22%21%
1679
11th to 20thNight
30%35%23%24%15%
1595
21st to endNight
31%35%22%28%11%
1746
June1st to 10thNight
21%45%16%33%22%
1620
11th to 20thNight
14%3111%28%43%
1620
21st to endNight
11%236%23%55%
1620
July1st to 10thNight
9%317%27%53%
1575
11th to 20thNight
10%36%21%28%32%
1566
21st to endNight
16%39%23%32%18%
1758
August1st to 10thNight
9%2313%33%39%
1780
11th to 20thNight
7%2217%32%40%
1780
21st to endNight
9%3211%29%46%
1980
September1st to 10thNight
12%439%26%44%
1818
11th to 20thNight
12%218%32%46%
1980
21st to endNight
13%2110%35%39%
1980
October1st to 10thNight
22%2319%23%32%
1980
11th to 20thNight
20%3311%24%39%
1980
21st to endNight
20%3210%20%45%
2464
November1st to 10thNight
21%2313%22%38%
2405
11th to 20thNight
21%2212%22%41%
2470
21st to endNight
30%3413%17%32%
2470
December1st to 10thNight
30%25%14%18%31%
2470
11th to 20thNight
38%45%13%21%19%
3041
21st to endNight
42%46%17%17%13%
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
20%231%35%11%1
270
11th to 20thDay
17%6%27%32%16%3
360
21st to endDay
16%9%32%30%12%2
506
February1st to 10thDay
17%8%32%27%12%3
460
11th to 20thDay
17%13%33%29%8%1
452
21st to endDay
21%13%38%23%5%
346
March1st to 10thDay
18%13%38%21%10%1
420
11th to 20thDay
17%10%35%25%11%1
420
21st to endDay
15%15%38%24%7%1
462
April1st to 10thDay
13%10%34%29%11%3
420
11th to 20thDay
10%16%34%29%9%1
412
21st to endDay
12%10%34%28%12%5%
420
May1st to 10thDay
15%9%32%29%11%4
423
11th to 20thDay
10%8%32%33%13%3
448
21st to endDay
11%10%33%31%12%3
485
June1st to 10thDay
5%426%42%16%7%
450
11th to 20thDay
3325%46%16%7%
450
21st to endDay
3225%42%18%9%
450
July1st to 10thDay
3113%51%21%11%
446
11th to 20thDay
2111%49%23%14%
444
21st to endDay
39%51%24%13%
487
August1st to 10thDay
2119%51%16%11%
447
11th to 20thDay
2113%53%17%15%
437
21st to endDay
1115%52%20%11%
495
September1st to 10thDay
3126%47%17%7%
450
11th to 20thDay
4428%43%18%3
450
21st to endDay
5%6%29%39%16%5%
450
October1st to 10thDay
6%7%32%36%17%2
450
11th to 20thDay
7%7%33%36%16%2
450
21st to endDay
7%5%27%39%18%5%
396
November1st to 10thDay
10%424%34%23%5%
270
11th to 20thDay
6%426%39%21%4
270
21st to endDay
14%5%34%29%13%4
270
December1st to 10thDay
13%333%31%17%3
270
11th to 20thDay
8%5%31%34%17%4
270
21st to endDay
26%7%25%28%13%2
297
January1st to 10thNight
13%123%37%21%5%
760
11th to 20thNight
11%319%41%21%6%
760
21st to endNight
16%416%40%20%4
836
February1st to 10thNight
14%416%37%23%6%
760
11th to 20thNight
13%319%38%22%6%
742
21st to endNight
17%5%14%38%20%4
592
March1st to 10thNight
14%415%42%22%3
720
11th to 20thNight
14%210%39%26%9%
720
21st to endNight
11%315%38%27%5%
792
April1st to 10thNight
12%411%43%26%4
720
11th to 20thNight
12%413%38%28%5%
711
21st to endNight
10%311%39%31%7%
720
May1st to 10thNight
11%210%40%32%6%
599
11th to 20thNight
6%214%31%39%8%
531
21st to endNight
9%411%36%34%5%
584
June1st to 10thNight
3110%39%39%7%
540
11th to 20thNight
317%39%45%5%
540
21st to endNight
216%36%47%9%
540
July1st to 10thNight
1126%59%12%
525
11th to 20thNight
1121%66%11%
522
21st to endNight
1218%59%19%
679
August1st to 10thNight
21125%55%17%
716
11th to 20thNight
215%66%18%
712
21st to endNight
2115%59%24%
792
September1st to 10thNight
3224%55%16%
720
11th to 20thNight
3332%49%12%
720
21st to endNight
47%34%43%13%
720
October1st to 10thNight
7%17%43%34%8%
720
11th to 20thNight
7%28%41%31%12%
720
21st to endNight
8%111%34%31%15%
792
November1st to 10thNight
7%111%41%29%11%
740
11th to 20thNight
6%112%42%29%10%
760
21st to endNight
9%418%37%25%7%
760
December1st to 10thNight
11%317%40%23%6%
760
11th to 20thNight
16%217%42%20%3
760
21st to endNight
15%318%39%20%5%
836
Page generated at 2024-02-17 03:28:42. Version ac07

Copyright 2024 Attilla Danko


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