Juniper Campground
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Juniper Campground clear sky chart from 2005-11-06 to 2024-03-08.

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
59%
24416
30%
79843
21%
24321
69%
24321
43%
39869

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
54%
802
30%
4108
24%
785
69%
785
31%
1929
January11th to 20thNight
52%
756
39%
3963
26%
740
66%
740
37%
1455
January21st to endNight
55%
826
22%
4289
24%
814
69%
814
29%
2088
February1st to 10thNight
48%
760
31%
2466
20%
760
62%
760
46%
1181
February11th to 20thNight
45%
741
31%
2218
18%
740
58%
740
47%
1133
February21st to endNight
40%
628
37%
1884
18%
628
59%
628
50%
924
March1st to 10thNight
46%
750
35%
2143
19%
750
59%
750
50%
1101
March11th to 20thNight
50%
720
31%
1980
19%
720
58%
720
45%
1085
March21st to endNight
47%
728
33%
2114
16%
728
62%
728
44%
1099
April1st to 10thNight
38%
540
34%
1800
18%
540
60%
540
47%
824
April11th to 20thNight
42%
533
32%
1777
20%
533
60%
533
41%
859
April21st to endNight
45%
540
34%
1800
20%
540
66%
540
48%
809
May1st to 10thNight
53%
540
30%
1800
23%
540
67%
540
44%
861
May11th to 20thNight
54%
531
24%
1650
18%
531
63%
531
36%
917
May21st to endNight
53%
584
34%
1552
18%
582
66%
582
52%
784
June1st to 10thNight
67%
540
27%
1440
20%
540
73%
540
50%
766
June11th to 20thNight
69%
540
34%
1440
26%
540
74%
540
61%
696
June21st to endNight
71%
540
25%
1440
20%
540
74%
540
46%
818
July1st to 10thNight
74%
525
17%
1423
16%
525
75%
525
32%
901
July11th to 20thNight
79%
522
16%
1566
16%
522
80%
522
32%
929
July21st to endNight
74%
591
13%
1674
12%
558
75%
558
26%
1081
August1st to 10thNight
79%
537
15%
1638
14%
534
80%
534
32%
962
August11th to 20thNight
74%
534
17%
1778
20%
534
75%
534
28%
1078
August21st to endNight
81%
594
23%
1980
27%
594
82%
594
35%
1085
September1st to 10thNight
79%
540
27%
1800
29%
540
81%
540
37%
967
September11th to 20thNight
76%
540
36%
1800
35%
540
80%
540
42%
910
September21st to endNight
72%
597
32%
2005
28%
597
77%
597
49%
940
October1st to 10thNight
62%
720
30%
2160
21%
720
68%
720
43%
1155
October11th to 20thNight
68%
720
42%
2160
26%
720
78%
720
63%
935
October21st to endNight
63%
792
40%
2376
25%
792
74%
792
58%
1075
November1st to 10thNight
67%
770
42%
2250
26%
770
78%
770
67%
959
November11th to 20thNight
66%
950
40%
2470
24%
950
74%
950
67%
1163
November21st to endNight
54%
950
37%
2470
21%
950
64%
950
53%
1326
December1st to 10thNight
53%
950
35%
2648
20%
950
64%
950
52%
1346
December11th to 20thNight
52%
948
30%
3133
19%
948
61%
948
42%
1630
December21st to endNight
45%
1037
20%
4648
16%
1026
58%
1026
33%
2098

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
23134245%6%9%61%
78749
Night
331342445%7%63%
80865
TransparencyDay
19%7%12%23%26%13%
78471
Night
21%7%11%22%27%13%
80664
SeeingDay
5%11%27%31%21%5%
14153
Night
5%5%27%41%20%2
24450

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
14144345%6%8%61%
2798
11th to 20thDay
23122236%8%71%
2860
21st to endDay
34235%345%7%9%56%
3146
February1st to 10thDay
142442445%8%62%
1712
11th to 20thDay
23144245%6%7%62%
1849
21st to endDay
1424424448%63%
1570
March1st to 10thDay
1213335%5%6%8%62%
1973
11th to 20thDay
2434434348%60%
1980
21st to endDay
2313325%5%5%8%62%
2240
April1st to 10thDay
221222446%8%68%
2160
11th to 20thDay
23234245%5%8%62%
2131
21st to endDay
221232445%8%65%
2160
May1st to 10thDay
321232445%8%67%
2160
11th to 20thDay
43134345%6%9%58%
2236
21st to endDay
231232346%8%66%
2724
June1st to 10thDay
12123245%7%10%64%
2520
11th to 20thDay
111222435%8%72%
2520
21st to endDay
4314325%5%6%10%56%
2520
July1st to 10thDay
33145%36%6%8%12%48%
2491
11th to 20thDay
2323438%8%9%14%44%
2340
21st to endDay
43246%48%9%12%13%35%
2545
August1st to 10thDay
42245%47%8%10%11%43%
2289
11th to 20thDay
4314437%6%8%12%47%
2123
21st to endDay
32135%36%7%9%12%49%
2376
September1st to 10thDay
5%424436%6%7%9%52%
2160
11th to 20thDay
5%42342347%7%60%
2160
21st to endDay
321223335%6%71%
1950
October1st to 10thDay
5%3234345%5%6%60%
1800
11th to 20thDay
4211222235%77%
1800
21st to endDay
331232323474%
1980
November1st to 10thDay
1212212346%76%
1807
11th to 20thDay
2112223346%75%
1710
21st to endDay
3423313346%69%
1710
December1st to 10thDay
122322336%7%69%
1529
11th to 20thDay
23224345%5%9%61%
1926
21st to endDay
1423323447%67%
2794
January1st to 10thNight
1425%5%345%5%7%59%
4185
11th to 20thNight
221122345%6%72%
4110
21st to endNight
25%243345%5%7%58%
4521
February1st to 10thNight
1424423446%66%
2466
11th to 20thNight
35%2332345%7%64%
2218
21st to endNight
1423323346%69%
1884
March1st to 10thNight
15%2332345%6%66%
2143
11th to 20thNight
45%2443435%7%60%
1980
21st to endNight
331342445%5%65%
2114
April1st to 10thNight
221343346%7%67%
1800
11th to 20thNight
4323424347%64%
1777
21st to endNight
2213324347%69%
1800
May1st to 10thNight
4213424346%67%
1800
11th to 20thNight
5%434435%45%7%56%
1650
21st to endNight
3212324346%70%
1552
June1st to 10thNight
1113435%5%6%9%62%
1440
11th to 20thNight
3212223348%71%
1440
21st to endNight
4313436%6%7%10%54%
1440
July1st to 10thNight
4425%5%47%8%7%11%44%
1464
11th to 20thNight
22245%46%8%10%13%44%
1620
21st to endNight
44347%48%7%10%13%35%
1773
August1st to 10thNight
32236%46%7%9%12%48%
1647
11th to 20thNight
4425%6%46%8%10%13%39%
1778
21st to endNight
4213435%7%10%11%50%
1980
September1st to 10thNight
4224335%6%8%10%53%
1800
11th to 20thNight
5%3134235%6%8%60%
1800
21st to endNight
5%213323346%68%
2005
October1st to 10thNight
6%32332345%6%62%
2160
11th to 20thNight
4111212235%78%
2160
21st to endNight
4212212345%73%
2376
November1st to 10thNight
2211112336%79%
2250
11th to 20thNight
1212222245%78%
2470
21st to endNight
45%12323336%68%
2470
December1st to 10thNight
2412323347%69%
2648
11th to 20thNight
33133245%6%8%63%
3271
21st to endNight
3424423336%65%
4873

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
19%8%12%33%26%2
2799
11th to 20thDay
13%7%15%40%22%3
2860
21st to endDay
23%10%13%27%24%4
3146
February1st to 10thDay
21%5%13%28%24%8%
1712
11th to 20thDay
21%5%9%29%26%9%
1859
21st to endDay
21%37%20%33%14%
1570
March1st to 10thDay
19%6%8%23%32%13%
1973
11th to 20thDay
23%5%9%22%30%11%
1980
21st to endDay
19%6%10%24%29%12%
2240
April1st to 10thDay
15%6%9%21%30%19%
2160
11th to 20thDay
20%6%8%19%31%17%
2134
21st to endDay
17%5%9%23%31%15%
2160
May1st to 10thDay
16%5%9%18%33%19%
2160
11th to 20thDay
23%7%11%21%25%13%
2239
21st to endDay
16%6%10%19%25%25%
2724
June1st to 10thDay
13%6%14%19%26%23%
2520
11th to 20thDay
11%47%14%25%39%
2520
21st to endDay
22%5%10%18%23%23%
2520
July1st to 10thDay
27%10%14%17%18%15%
2423
11th to 20thDay
22%11%22%24%13%8%
2271
21st to endDay
29%16%25%23%7%1
2404
August1st to 10thDay
27%14%21%18%13%8%
2274
11th to 20thDay
25%11%17%21%19%7%
2123
21st to endDay
22%11%17%26%20%5%
2376
September1st to 10thDay
25%9%13%22%22%10%
2160
11th to 20thDay
21%6%12%20%24%17%
2160
21st to endDay
15%46%24%35%17%
1950
October1st to 10thDay
23%7%9%20%25%16%
1800
11th to 20thDay
14%2414%40%26%
1800
21st to endDay
16%38%21%37%14%
1980
November1st to 10thDay
12%38%25%37%15%
1807
11th to 20thDay
12%5%8%27%39%9%
1710
21st to endDay
19%47%25%34%12%
1710
December1st to 10thDay
16%5%13%33%26%7%
1529
11th to 20thDay
22%6%12%27%27%5%
1924
21st to endDay
19%5%11%25%32%9%
2794
January1st to 10thNight
23%8%11%30%25%4
4185
11th to 20thNight
15%6%11%36%25%5%
4110
21st to endNight
24%9%12%26%25%4
4521
February1st to 10thNight
20%5%12%25%29%10%
2466
11th to 20thNight
20%6%10%25%27%11%
2218
21st to endNight
19%47%17%36%17%
1884
March1st to 10thNight
20%5%6%23%32%13%
2143
11th to 20thNight
24%5%8%20%31%12%
1980
21st to endNight
21%6%7%19%35%12%
2114
April1st to 10thNight
17%5%8%21%30%19%
1800
11th to 20thNight
22%5%7%19%26%21%
1777
21st to endNight
16%6%10%18%36%14%
1800
May1st to 10thNight
20%6%7%15%32%20%
1800
11th to 20thNight
27%8%10%19%20%16%
1651
21st to endNight
16%6%10%18%24%26%
1552
June1st to 10thNight
18%7%15%19%21%21%
1440
11th to 20thNight
14%47%12%24%39%
1440
21st to endNight
23%8%12%17%17%24%
1440
July1st to 10thNight
30%12%15%15%12%15%
1423
11th to 20thNight
25%15%22%18%12%9%
1566
21st to endNight
33%14%26%18%7%1
1674
August1st to 10thNight
26%14%21%18%11%10%
1638
11th to 20thNight
30%14%20%17%12%8%
1778
21st to endNight
22%13%18%24%16%7%
1980
September1st to 10thNight
24%9%17%23%16%11%
1800
11th to 20thNight
22%7%14%15%23%19%
1800
21st to endNight
18%6%10%18%30%19%
2005
October1st to 10thNight
24%6%10%18%23%20%
2160
11th to 20thNight
13%35%15%37%28%
2160
21st to endNight
15%37%21%36%17%
2376
November1st to 10thNight
10%36%24%42%15%
2250
11th to 20thNight
11%47%26%41%13%
2470
21st to endNight
21%46%21%33%15%
2470
December1st to 10thNight
19%49%33%28%6%
2648
11th to 20thNight
22%6%12%27%29%5%
3272
21st to endNight
22%6%9%25%32%6%
4873

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
217%38%32%10%1
270
11th to 20thDay
10%14%39%31%5%1
270
21st to endDay
310%41%29%14%2
297
February1st to 10thDay
416%38%34%8%
270
11th to 20thDay
6%16%41%31%6%
270
21st to endDay
8%25%39%21%6%
225
March1st to 10thDay
325%33%31%7%
364
11th to 20thDay
10%20%31%27%11%2
420
21st to endDay
8%31%34%19%8%
462
April1st to 10thDay
6%21%39%25%8%1
420
11th to 20thDay
9%28%35%21%6%1
412
21st to endDay
5%29%34%27%5%
420
May1st to 10thDay
6%16%41%30%7%1
423
11th to 20thDay
5%16%32%30%15%3
473
21st to endDay
412%32%33%17%1
679
June1st to 10thDay
37%22%37%30%2
630
11th to 20thDay
28%23%37%27%4
630
21st to endDay
6%420%37%28%5%
630
July1st to 10thDay
4212%33%38%11%
593
11th to 20thDay
417%26%41%20%
444
21st to endDay
417%25%41%22%
487
August1st to 10thDay
5%19%28%40%16%
447
11th to 20thDay
4213%32%39%10%
437
21st to endDay
5%210%32%37%15%
495
September1st to 10thDay
6%313%34%34%10%
450
11th to 20thDay
3222%38%28%6%
450
21st to endDay
5%7%21%33%26%9%
301
October1st to 10thDay
5%10%26%30%26%3
270
11th to 20thDay
6%9%29%27%26%4
270
21st to endDay
8%9%24%34%21%3
297
November1st to 10thDay
413%33%37%14%
270
11th to 20thDay
46%32%40%16%3
270
21st to endDay
7%12%42%23%14%1
270
December1st to 10thDay
310%40%33%14%1
270
11th to 20thDay
5%13%40%34%7%1
270
21st to endDay
10%14%40%30%6%
297
January1st to 10thNight
3433%43%14%2
809
11th to 20thNight
5%5%34%41%13%2
760
21st to endNight
6%431%44%13%2
836
February1st to 10thNight
45%37%43%10%
760
11th to 20thNight
6%6%40%40%8%
744
21st to endNight
47%47%38%4
628
March1st to 10thNight
47%40%40%9%
750
11th to 20thNight
6%7%32%40%14%
720
21st to endNight
310%36%42%9%
728
April1st to 10thNight
49%45%35%7%1
540
11th to 20thNight
6%10%39%36%9%
533
21st to endNight
48%42%39%8%
540
May1st to 10thNight
46%33%45%10%
540
11th to 20thNight
7%5%26%40%19%2
531
21st to endNight
47%32%41%16%1
584
June1st to 10thNight
1422%46%26%1
540
11th to 20thNight
2322%51%21%1
540
21st to endNight
4116%46%31%1
540
July1st to 10thNight
5%28%40%41%4
525
11th to 20thNight
42433%52%6%
522
21st to endNight
425%26%54%10%
591
August1st to 10thNight
46%27%53%9%
537
11th to 20thNight
6%27%38%43%4
534
21st to endNight
5%25%35%48%6%
594
September1st to 10thNight
5%18%42%41%3
540
11th to 20thNight
6%110%47%34%2
540
21st to endNight
5%315%46%28%3
597
October1st to 10thNight
6%421%45%23%1
720
11th to 20thNight
4224%48%20%2
720
21st to endNight
6%424%40%23%3
792
November1st to 10thNight
4324%48%20%1
770
11th to 20thNight
2426%49%18%2
950
21st to endNight
7%5%29%38%19%2
950
December1st to 10thNight
5%5%34%45%11%1
950
11th to 20thNight
6%6%34%43%11%1
950
21st to endNight
6%8%36%41%8%
1045
Page generated at 2024-03-05 05:24:04. Version ac07

Copyright © 2024 Attilla Danko.


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