Argonia Launch Site
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Argonia Launch Site clear sky chart from 2005-11-05 to 2018-02-22.

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
40%
16525
28%
48893
15%
16480
52%
16480
34%
26564

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 15thNight
36%
975
31%
2522
14%
970
48%
970
36%
1442
January16th to endNight
36%
1040
37%
2704
13%
1040
50%
1040
41%
1453
February1st to 15thNight
30%
873
25%
2401
10%
869
40%
869
30%
1422
February16th to endNight
27%
660
30%
1978
10%
660
44%
660
28%
1102
March1st to 15thNight
32%
585
26%
2025
16%
585
44%
585
26%
1100
March16th to endNight
28%
576
21%
2112
11%
576
41%
576
23%
1200
April1st to 15thNight
25%
539
24%
1929
13%
539
44%
539
25%
1035
April16th to endNight
22%
540
24%
1620
10%
540
40%
540
23%
957
May1st to 15thNight
29%
539
25%
1620
14%
539
45%
539
31%
924
May16th to endNight
37%
561
21%
1684
13%
561
49%
561
30%
954
June1st to 15thNight
42%
540
20%
1620
10%
540
52%
540
37%
862
June16th to endNight
50%
540
25%
1620
13%
540
62%
540
46%
776
July1st to 15thNight
59%
510
20%
1530
15%
510
65%
510
41%
795
July16th to endNight
65%
564
29%
1594
26%
531
76%
531
43%
809
August1st to 15thNight
66%
539
26%
1610
26%
536
72%
536
43%
834
August16th to endNight
69%
573
28%
1790
29%
573
74%
573
42%
917
September1st to 15thNight
56%
540
25%
1980
24%
540
63%
540
32%
1029
September16th to endNight
51%
537
34%
1980
24%
537
66%
537
33%
977
October1st to 15thNight
42%
612
32%
2052
23%
612
51%
612
32%
1087
October16th to endNight
44%
768
38%
2304
16%
768
60%
768
47%
1087
November1st to 15thNight
38%
924
30%
2444
11%
924
50%
924
41%
1313
November16th to endNight
36%
975
34%
2535
13%
975
50%
975
37%
1407
December1st to 15thNight
35%
975
29%
2535
11%
975
48%
975
34%
1465
December16th to endNight
33%
1040
32%
2704
12%
1040
48%
1040
31%
1617

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
9%424423447%52%
49359
Night
8%413323347%56%
49089
Cloud CoverDay
9%424423447%52%
49357
Night
8%413323347%56%
49089
TransparencyDay
31%312%27%20%5%
49057
Night
28%211%27%23%6%
48894
SeeingDay
9%13%23%30%18%4
6289
Night
9%20%25%31%12%
16528

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 15thDay
8%5%23322335%59%
1746
16th to endDay
8%424312238%57%
1872
February1st to 15thDay
8%7%25%423336%51%
1803
16th to endDay
8%6%23323345%56%
1642
March1st to 15thDay
11%6%25%33435%6%47%
1934
16th to endDay
16%6%25%324245%45%
2112
April1st to 15thDay
11%5%24423447%49%
2016
16th to endDay
16%424423346%46%
2340
May1st to 15thDay
14%414424435%49%
2331
16th to endDay
10%5%346%26%45%6%44%
2430
June1st to 15thDay
6%42432446%9%52%
2340
16th to endDay
5%21341445%9%56%
2340
July1st to 15thDay
8%3133346%5%9%49%
2340
16th to endDay
32134345%6%9%53%
2466
August1st to 15thDay
5%313435%5%6%10%49%
2340
16th to endDay
6%3134246%6%7%53%
2408
September1st to 15thDay
10%425%5%24347%50%
1980
16th to endDay
8%413423346%57%
1980
October1st to 15thDay
12%313323245%58%
1895
16th to endDay
6%413322336%62%
1920
November1st to 15thDay
6%323213346%61%
1742
16th to endDay
9%31233226%63%
1755
December1st to 15thDay
11%5%2322335%6%53%
1755
16th to endDay
12%7%2432335%6%46%
1872
January1st to 15thNight
7%41431335%6%58%
2522
16th to endNight
6%41221334465%
2704
February1st to 15thNight
10%6%34313246%53%
2391
16th to endNight
9%423423335%55%
1978
March1st to 15thNight
8%6%24423345%53%
2025
16th to endNight
14%5%23323446%48%
2112
April1st to 15thNight
12%4235%1345%7%51%
1929
16th to endNight
14%6%24312346%49%
1620
May1st to 15thNight
12%32342335%7%51%
1619
16th to endNight
8%4233245%5%11%47%
1683
June1st to 15thNight
5%2234245%5%10%53%
1620
16th to endNight
42122447%9%61%
1620
July1st to 15thNight
5%31332447%12%51%
1620
16th to endNight
421231335%10%58%
1702
August1st to 15thNight
32124345%8%10%52%
1620
16th to endNight
331333445%9%55%
1790
September1st to 15thNight
8%324423348%53%
1980
16th to endNight
7%3134235%6%6%55%
1980
October1st to 15thNight
10%423423335%56%
2052
16th to endNight
6%21221222470%
2304
November1st to 15thNight
6%312323247%60%
2444
16th to endNight
9%313212335%61%
2535
December1st to 15thNight
10%5%12323347%56%
2535
16th to endNight
10%6%24322346%53%
2704

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 15thDay
8%5%24312335%59%
1746
16th to endDay
8%424322238%57%
1872
February1st to 15thDay
7%7%35%423336%51%
1803
16th to endDay
8%6%1332335%5%56%
1642
March1st to 15thDay
11%6%24433347%47%
1934
16th to endDay
16%6%25%423345%45%
2110
April1st to 15thDay
11%434424347%50%
2016
16th to endDay
16%5%24424336%46%
2340
May1st to 15thDay
13%5%2342435%6%49%
2331
16th to endDay
10%5%25%5%35%5%6%6%44%
2430
June1st to 15thDay
7%42342445%9%52%
2340
16th to endDay
5%21332445%9%56%
2340
July1st to 15thDay
8%3234246%5%9%48%
2340
16th to endDay
3213435%6%6%9%53%
2466
August1st to 15thDay
5%323435%6%7%10%49%
2340
16th to endDay
6%3134245%5%8%53%
2408
September1st to 15thDay
9%5%25%424346%50%
1980
16th to endDay
8%413323436%57%
1980
October1st to 15thDay
12%312322335%58%
1895
16th to endDay
7%423312336%62%
1920
November1st to 15thDay
6%42331335%6%61%
1742
16th to endDay
9%312312225%63%
1755
December1st to 15thDay
11%5%23223347%52%
1755
16th to endDay
11%7%25%423346%47%
1872
January1st to 15thNight
7%413323346%57%
2522
16th to endNight
6%42221334465%
2704
February1st to 15thNight
10%6%25%313336%53%
2391
16th to endNight
9%413423335%56%
1978
March1st to 15thNight
9%5%24324345%53%
2025
16th to endNight
14%5%24323346%48%
2112
April1st to 15thNight
12%31342335%7%51%
1929
16th to endNight
14%6%24322345%49%
1620
May1st to 15thNight
12%32332235%7%52%
1619
16th to endNight
8%4233235%6%11%46%
1683
June1st to 15thNight
5%31342346%10%54%
1620
16th to endNight
411121446%9%61%
1620
July1st to 15thNight
5%212325%47%11%52%
1620
16th to endNight
431322335%11%57%
1702
August1st to 15thNight
32124345%7%11%52%
1620
16th to endNight
331343446%9%55%
1790
September1st to 15thNight
8%41443335%8%52%
1980
16th to endNight
7%31342445%6%55%
1980
October1st to 15thNight
10%5%24322235%57%
2052
16th to endNight
6%212212225%70%
2304
November1st to 15thNight
6%313313347%61%
2444
16th to endNight
8%312313335%61%
2535
December1st to 15thNight
10%412223347%55%
2535
16th to endNight
11%5%2442235%6%52%
2704

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 15thDay
29%212%31%22%2
1747
16th to endDay
27%111%31%23%3
1872
February1st to 15thDay
35%214%28%15%4
1804
16th to endDay
29%112%29%21%5%
1642
March1st to 15thDay
37%210%23%19%6%
1934
16th to endDay
41%29%25%17%2
2112
April1st to 15thDay
34%212%27%18%4
2016
16th to endDay
39%210%28%15%3
2340
May1st to 15thDay
36%311%21%23%3
2331
16th to endDay
39%313%26%14%2
2434
June1st to 15thDay
28%316%27%19%5%
2340
16th to endDay
23%312%28%23%6%
2340
July1st to 15thDay
29%412%29%21%2
2201
16th to endDay
23%415%29%22%4
2311
August1st to 15thDay
27%5%17%26%17%5%
2326
16th to endDay
26%5%13%27%20%6%
2408
September1st to 15thDay
34%311%27%15%8%
1980
16th to endDay
28%29%31%22%5%
1980
October1st to 15thDay
29%19%24%27%6%
1895
16th to endDay
25%17%29%28%7%
1920
November1st to 15thDay
25%19%26%28%9%
1742
16th to endDay
25%18%29%27%7%
1755
December1st to 15thDay
31%212%33%17%2
1755
16th to endDay
38%211%24%18%4
1872
January1st to 15thNight
27%28%33%23%4
2522
16th to endNight
23%19%31%28%5%
2704
February1st to 15thNight
33%313%27%17%5%
2401
16th to endNight
31%210%28%19%8%
1978
March1st to 15thNight
33%28%24%22%8%
2025
16th to endNight
36%311%26%17%3
2112
April1st to 15thNight
32%211%24%22%6%
1929
16th to endNight
36%211%23%20%5%
1620
May1st to 15thNight
32%313%24%22%4
1620
16th to endNight
30%418%28%15%2
1685
June1st to 15thNight
25%317%28%20%3
1620
16th to endNight
18%314%31%23%8%
1620
July1st to 15thNight
23%413%30%24%4
1530
16th to endNight
21%311%32%24%5%
1594
August1st to 15thNight
23%416%30%18%6%
1610
16th to endNight
24%312%28%22%6%
1790
September1st to 15thNight
30%310%26%19%9%
1980
16th to endNight
27%38%27%27%6%
1980
October1st to 15thNight
31%27%21%25%10%
2052
16th to endNight
19%16%27%35%9%
2304
November1st to 15thNight
24%111%24%28%9%
2444
16th to endNight
25%26%30%28%7%
2535
December1st to 15thNight
28%211%30%22%3
2535
16th to endNight
33%212%27%17%7%
2704

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 15thDay
18%8%24%37%8%2
135
16th to endDay
11%8%43%30%41
144
February1st to 15thDay
10%11%44%26%5%
135
16th to endDay
11%19%43%22%41
100
March1st to 15thDay
8%18%53%15%3
90
16th to endDay
22%11%35%26%31
96
April1st to 15thDay
11%20%34%28%5%
135
16th to endDay
18%23%31%20%5%
450
May1st to 15thDay
11%22%32%23%7%2
468
16th to endDay
14%19%27%24%10%3
517
June1st to 15thDay
8%15%22%31%18%3
495
16th to endDay
213%21%35%21%4
495
July1st to 15thDay
8%11%11%33%30%4
475
16th to endDay
412%6%33%34%9%
515
August1st to 15thDay
5%7%8%41%32%5%
493
16th to endDay
6%6%12%33%32%7%
448
September1st to 15thDay
217%38%32%8%
135
16th to endDay
11%123%33%19%10%
135
October1st to 15thDay
8%8%28%36%14%3
135
16th to endDay
8%9%31%31%13%5%
144
November1st to 15thDay
14%6%30%26%15%6%
135
16th to endDay
17%14%33%22%11%
135
December1st to 15thDay
8%8%45%26%7%2
135
16th to endDay
16%15%36%28%2
144
January1st to 15thNight
8%23%28%31%8%
975
16th to endNight
8%23%28%32%6%
1040
February1st to 15thNight
12%23%29%28%5%
873
16th to endNight
12%26%30%25%4
660
March1st to 15thNight
11%23%27%29%6%
585
16th to endNight
12%24%31%26%5%
576
April1st to 15thNight
13%26%30%22%6%
539
16th to endNight
18%25%30%20%4
540
May1st to 15thNight
9%23%32%24%8%1
540
16th to endNight
10%21%26%25%12%2
563
June1st to 15thNight
6%18%27%33%13%
540
16th to endNight
117%27%37%15%
540
July1st to 15thNight
5%11%17%42%22%
510
16th to endNight
416%5%43%26%3
564
August1st to 15thNight
49%12%45%27%
539
16th to endNight
49%10%39%33%3
573
September1st to 15thNight
8%9%18%39%22%2
540
16th to endNight
8%10%22%34%20%2
537
October1st to 15thNight
13%12%26%26%18%1
612
16th to endNight
6%14%31%33%12%
768
November1st to 15thNight
7%20%30%28%11%1
924
16th to endNight
10%24%26%29%8%
975
December1st to 15thNight
12%22%26%30%7%
975
16th to endNight
11%23%26%33%5%
1040
Page generated at 2018-02-23 10:21:35. Version ac04

Copyright 2018 A. Danko


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