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 2017-09-10.

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%
15796
28%
46844
15%
15751
52%
15751
34%
25435

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%
900
32%
2327
14%
895
48%
895
36%
1318
January16th to endNight
35%
960
35%
2496
13%
960
49%
960
39%
1369
February1st to 15thNight
29%
805
24%
2213
10%
801
39%
801
29%
1318
February16th to endNight
28%
632
31%
1894
10%
632
45%
632
30%
1035
March1st to 15thNight
32%
585
26%
2025
15%
585
44%
585
26%
1100
March16th to endNight
29%
576
21%
2112
11%
576
42%
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
30%
539
25%
1620
14%
539
46%
539
31%
924
May16th to endNight
36%
561
21%
1684
13%
561
48%
561
30%
954
June1st to 15thNight
43%
540
20%
1620
10%
540
53%
540
37%
862
June16th to endNight
50%
540
25%
1620
13%
540
61%
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
67%
539
26%
1610
26%
536
73%
536
43%
834
August16th to endNight
69%
573
28%
1790
29%
573
74%
573
42%
917
September1st to 15thNight
55%
525
24%
1925
24%
525
62%
525
32%
1007
September16th to endNight
53%
492
33%
1815
25%
492
66%
492
33%
884
October1st to 15thNight
43%
561
34%
1881
25%
561
52%
561
32%
991
October16th to endNight
44%
704
36%
2112
15%
704
60%
704
47%
1003
November1st to 15thNight
37%
851
31%
2251
11%
851
50%
851
42%
1198
November16th to endNight
35%
900
33%
2340
11%
900
49%
900
36%
1301
December1st to 15thNight
33%
900
29%
2340
10%
900
46%
900
33%
1366
December16th to endNight
34%
960
32%
2496
12%
960
48%
960
32%
1482

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%
47783
Night
8%413323347%56%
47040
Cloud CoverDay
9%424424447%52%
47781
Night
8%413323347%56%
47040
TransparencyDay
31%311%27%20%4
47481
Night
28%211%27%23%6%
46845
SeeingDay
9%13%22%30%18%4
5795
Night
9%20%25%31%12%
15799

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
9%5%2332233460%
1611
16th to endDay
8%424312248%55%
1728
February1st to 15thDay
8%7%25%423336%51%
1660
16th to endDay
8%5%22323345%57%
1580
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%
1922
16th to endDay
7%413423347%58%
1815
October1st to 15thDay
12%312323245%58%
1737
16th to endDay
7%413322336%61%
1760
November1st to 15thDay
6%313213347%62%
1605
16th to endDay
10%41232225%62%
1620
December1st to 15thDay
12%5%2322335%6%52%
1620
16th to endDay
12%7%24323346%47%
1728
January1st to 15thNight
7%313313246%59%
2327
16th to endNight
7%41331334462%
2496
February1st to 15thNight
11%6%34312236%53%
2203
16th to endNight
8%422423335%57%
1894
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%52%
1925
16th to endNight
6%3134235%5%6%56%
1815
October1st to 15thNight
10%423423335%57%
1881
16th to endNight
6%21221222470%
2112
November1st to 15thNight
7%312313246%62%
2251
16th to endNight
9%313213335%62%
2340
December1st to 15thNight
11%5%12313347%55%
2340
16th to endNight
11%6%23322346%54%
2496

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%1431233460%
1611
16th to endDay
8%424322238%55%
1728
February1st to 15thDay
7%6%35%423336%51%
1660
16th to endDay
8%6%1232335%5%57%
1580
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%
1922
16th to endDay
7%414323336%58%
1815
October1st to 15thDay
12%212322335%58%
1737
16th to endDay
7%423313335%62%
1760
November1st to 15thDay
5%32331335%6%62%
1605
16th to endDay
10%412312235%62%
1620
December1st to 15thDay
12%5%23223347%51%
1620
16th to endDay
12%7%25%323345%48%
1728
January1st to 15thNight
7%413323346%58%
2327
16th to endNight
7%42221334462%
2496
February1st to 15thNight
10%6%25%212335%53%
2203
16th to endNight
8%413423335%58%
1894
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%
1925
16th to endNight
6%31242445%6%56%
1815
October1st to 15thNight
10%424322235%57%
1881
16th to endNight
6%21221222470%
2112
November1st to 15thNight
6%312313346%62%
2251
16th to endNight
9%312313335%61%
2340
December1st to 15thNight
11%5%12223348%54%
2340
16th to endNight
11%5%23322346%53%
2496

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
28%110%31%24%2
1612
16th to endDay
29%111%32%21%3
1728
February1st to 15thDay
35%213%28%15%4
1661
16th to endDay
28%112%30%21%5%
1580
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%211%26%15%8%
1922
16th to endDay
28%29%30%24%5%
1815
October1st to 15thDay
29%110%25%27%5%
1737
16th to endDay
25%17%30%27%6%
1760
November1st to 15thDay
23%19%26%29%10%
1605
16th to endDay
26%18%29%26%7%
1620
December1st to 15thDay
33%212%32%16%1
1620
16th to endDay
38%210%25%19%3
1728
January1st to 15thNight
27%27%33%25%4
2327
16th to endNight
25%19%31%26%5%
2496
February1st to 15thNight
33%212%26%18%5%
2213
16th to endNight
29%210%29%20%8%
1894
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%
1925
16th to endNight
26%38%25%28%7%
1815
October1st to 15thNight
30%28%22%25%10%
1881
16th to endNight
20%16%28%35%8%
2112
November1st to 15thNight
23%110%23%30%10%
2251
16th to endNight
26%16%29%27%7%
2340
December1st to 15thNight
29%211%31%21%2
2340
16th to endNight
32%112%27%18%7%
2496

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
20%10%25%34%6%3
90
16th to endDay
13%10%40%29%5%1
96
February1st to 15thDay
8%13%43%27%5%1
90
16th to endDay
6%17%43%27%41
81
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
218%42%29%6%
119
16th to endDay
7%221%27%25%15%
90
October1st to 15thDay
6%7%24%37%18%4
90
16th to endDay
8%7%33%30%13%7%
96
November1st to 15thDay
10%330%27%21%7%
90
16th to endDay
22%17%33%16%8%1
90
December1st to 15thDay
13%446%25%6%3
90
16th to endDay
18%15%32%29%4
96
January1st to 15thNight
8%24%27%31%8%
900
16th to endNight
8%24%27%32%6%
960
February1st to 15thNight
12%23%28%28%5%
805
16th to endNight
10%26%31%26%4
632
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%21%1
525
16th to endNight
8%11%20%33%22%3
492
October1st to 15thNight
13%13%26%25%19%1
561
16th to endNight
6%14%31%33%12%
704
November1st to 15thNight
7%21%29%28%11%1
851
16th to endNight
10%25%25%28%8%
900
December1st to 15thNight
13%23%25%29%6%
900
16th to endNight
11%24%25%32%5%
960
Page generated at 2017-09-11 18:35:22. Version ac04

Copyright 2017 A. Danko


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