Camp Saulaine
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Camp Saulaine clear sky chart from 2005-11-05 to 2018-03-21.

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
35%
15519
12%
48952
9%
15484
40%
15484
17%
35258

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
16%
777
7%
2685
3%
776
21%
776
7%
2198
January16th to endNight
22%
832
8%
2704
4%
832
27%
832
7%
2262
February1st to 15thNight
19%
761
7%
2482
2%
761
25%
761
9%
1992
February16th to endNight
23%
683
10%
2184
5%
683
30%
683
12%
1654
March1st to 15thNight
24%
780
12%
2148
6%
780
29%
780
16%
1625
March16th to endNight
35%
792
20%
2178
11%
792
42%
792
25%
1473
April1st to 15thNight
28%
718
14%
1826
6%
718
33%
718
22%
1341
April16th to endNight
39%
542
19%
1622
10%
542
45%
542
24%
1092
May1st to 15thNight
47%
489
15%
1569
11%
489
53%
489
24%
1023
May16th to endNight
49%
374
16%
1497
15%
374
59%
374
25%
836
June1st to 15thNight
48%
360
12%
1416
12%
360
56%
360
21%
860
June16th to endNight
53%
360
13%
1260
15%
360
57%
360
26%
756
July1st to 15thNight
65%
340
17%
1245
22%
340
69%
340
33%
664
July16th to endNight
60%
486
16%
1519
17%
455
62%
455
29%
904
August1st to 15thNight
66%
539
16%
1609
12%
536
69%
536
34%
940
August16th to endNight
62%
609
20%
1755
14%
609
65%
609
34%
1062
September1st to 15thNight
54%
720
18%
1821
10%
720
57%
720
33%
1191
September16th to endNight
55%
717
21%
1997
16%
717
58%
717
29%
1288
October1st to 15thNight
40%
720
15%
2160
13%
720
44%
720
20%
1514
October16th to endNight
24%
768
11%
2304
7%
768
30%
768
13%
1792
November1st to 15thNight
33%
760
14%
2599
12%
760
38%
760
16%
1842
November16th to endNight
25%
780
9%
2730
7%
780
29%
780
10%
2148
December1st to 15thNight
15%
780
4%
2730
1%
780
17%
780
6%
2290
December16th to endNight
11%
832
4%
2912
1%
832
15%
832
5%
2511

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
15%9%37%6%35%45%7%31%
49885
Night
14%9%47%6%35%45%6%31%
49127
Cloud CoverDay
15%9%47%6%35%45%7%31%
49895
Night
15%9%47%6%35%45%6%32%
49131
TransparencyDay
51%6%12%18%9%
49578
Night
51%7%12%17%9%
48952
SeeingDay
18%6%25%25%16%6%
6175
Night
19%7%28%29%12%1
15526

By Month

Percentage Cloud Cover NE (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
16%13%6%10%8%46%46%5%16%
1581
16th to endDay
13%16%6%11%9%5%5%45%7%13%
1872
February1st to 15thDay
12%14%6%12%10%5%6%445%16%
1710
16th to endDay
15%16%48%7%45%5%45%22%
1571
March1st to 15thDay
14%11%48%8%45%345%27%
2131
16th to endDay
14%10%37%5%3444437%
2174
April1st to 15thDay
21%10%35%5%2445%6%30%
2131
16th to endDay
17%8%35%424347%38%
2340
May1st to 15thDay
17%7%35%5%24447%35%
2379
16th to endDay
13%5%25%5%2346%8%41%
2618
June1st to 15thDay
17%6%24425%5%5%8%36%
2539
16th to endDay
14%4246%36%5%6%8%37%
2700
July1st to 15thDay
9%5%25%6%36%46%8%41%
2637
16th to endDay
11%5%26%6%35%5%6%9%37%
2542
August1st to 15thDay
9%6%26%5%35%5%6%9%39%
2340
16th to endDay
10%6%25%5%35%5%7%9%39%
2434
September1st to 15thDay
16%6%35%5%34447%37%
2136
16th to endDay
14%5%26%5%345%47%39%
1962
October1st to 15thDay
19%8%37%6%24446%32%
1800
16th to endDay
25%13%39%6%3345%5%19%
1920
November1st to 15thDay
15%13%47%5%345%6%7%26%
1584
16th to endDay
19%16%6%9%7%345%5%5%16%
1560
December1st to 15thDay
15%17%9%11%8%35%5%46%11%
1560
16th to endDay
19%14%7%10%7%4445%6%14%
1664
January1st to 15thNight
18%14%6%8%8%5%6%45%5%15%
2685
16th to endNight
12%14%7%11%11%5%6%45%5%14%
2704
February1st to 15thNight
12%16%6%10%8%36%5%45%18%
2480
16th to endNight
13%13%5%10%6%35%45%7%23%
2184
March1st to 15thNight
15%11%5%8%8%34335%30%
2136
16th to endNight
14%8%45%324445%40%
2178
April1st to 15thNight
19%9%35%5%24446%34%
1826
16th to endNight
15%7%35%5%34345%40%
1622
May1st to 15thNight
15%5%35%5%25%46%7%38%
1569
16th to endNight
11%5%2442445%7%48%
1495
June1st to 15thNight
13%425%435%45%7%42%
1416
16th to endNight
10%4236%35%5%5%7%45%
1260
July1st to 15thNight
5%5%24324446%54%
1320
16th to endNight
7%4235%35%5%6%7%48%
1624
August1st to 15thNight
6%314425%47%10%47%
1620
16th to endNight
9%5%144345%46%52%
1755
September1st to 15thNight
14%42441445%7%46%
1821
16th to endNight
12%5%25%434446%46%
1997
October1st to 15thNight
18%6%25%5%345%46%37%
2160
16th to endNight
21%10%47%6%35%45%5%23%
2304
November1st to 15thNight
17%10%35%5%35%5%5%7%30%
2599
16th to endNight
19%12%5%8%6%36%5%5%6%20%
2730
December1st to 15thNight
17%15%6%10%9%35%445%14%
2730
16th to endNight
18%15%8%12%8%45%45%5%11%
2912

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
16%13%6%9%9%45%45%5%16%
1581
16th to endDay
13%16%6%11%8%5%6%5%46%15%
1872
February1st to 15thDay
12%14%7%11%10%46%445%16%
1710
16th to endDay
15%16%5%7%6%45%5%5%422%
1571
March1st to 15thDay
14%12%5%7%8%35%5%45%27%
2142
16th to endDay
14%9%46%6%24445%37%
2173
April1st to 15thDay
20%11%45%5%2345%6%30%
2131
16th to endDay
17%8%35%423347%37%
2340
May1st to 15thDay
17%7%345%3445%7%35%
2379
16th to endDay
13%5%25%425%45%7%41%
2618
June1st to 15thDay
18%5%2442445%8%37%
2539
16th to endDay
14%425%6%36%5%5%8%37%
2700
July1st to 15thDay
9%426%5%35%5%5%9%41%
2637
16th to endDay
10%5%35%6%35%5%7%9%37%
2542
August1st to 15thDay
9%5%26%7%35%5%7%8%39%
2340
16th to endDay
11%6%15%6%35%5%7%8%38%
2434
September1st to 15thDay
15%6%26%43445%7%38%
2136
16th to endDay
14%5%25%5%45%447%39%
1962
October1st to 15thDay
19%8%37%6%34436%32%
1800
16th to endDay
26%13%37%6%34445%21%
1920
November1st to 15thDay
15%12%47%6%45%45%6%27%
1584
16th to endDay
17%15%7%9%6%35%5%5%6%16%
1560
December1st to 15thDay
15%19%7%11%7%5%5%5%45%11%
1560
16th to endDay
18%15%7%10%7%35%5%46%14%
1664
January1st to 15thNight
17%15%6%8%7%46%46%6%16%
2685
16th to endNight
13%13%7%12%9%46%6%5%416%
2704
February1st to 15thNight
12%14%7%9%8%46%45%5%19%
2473
16th to endNight
14%12%6%10%6%35%46%6%23%
2184
March1st to 15thNight
15%11%5%9%7%35%33430%
2148
16th to endNight
14%9%344235%46%40%
2178
April1st to 15thNight
19%9%35%5%24446%34%
1826
16th to endNight
15%8%35%6%33346%40%
1622
May1st to 15thNight
15%5%345%35%45%7%38%
1568
16th to endNight
11%5%1342445%7%48%
1495
June1st to 15thNight
14%425%5%345%5%8%41%
1416
16th to endNight
10%4236%26%45%7%45%
1260
July1st to 15thNight
6%334424446%54%
1320
16th to endNight
7%325%435%5%6%8%47%
1624
August1st to 15thNight
6%3144246%7%10%48%
1620
16th to endNight
9%4135%24445%52%
1755
September1st to 15thNight
14%5%1332346%6%47%
1821
16th to endNight
13%424424446%46%
1997
October1st to 15thNight
19%5%25%43445%5%38%
2160
16th to endNight
21%11%37%6%345%5%5%24%
2304
November1st to 15thNight
17%10%35%5%345%5%6%31%
2599
16th to endNight
19%12%47%7%37%45%6%21%
2730
December1st to 15thNight
18%15%6%11%8%45%445%15%
2730
16th to endNight
19%15%8%12%8%45%35%5%12%
2912

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
66%7%10%10%4
1582
16th to endDay
68%7%10%10%3
1872
February1st to 15thDay
68%5%9%12%3
1712
16th to endDay
62%6%10%13%6%
1571
March1st to 15thDay
57%6%13%14%7%
2142
16th to endDay
48%410%18%16%1
2174
April1st to 15thDay
54%5%9%19%10%
2131
16th to endDay
45%410%22%14%1
2340
May1st to 15thDay
46%6%10%20%14%1
2379
16th to endDay
40%7%13%23%14%2
2622
June1st to 15thDay
43%7%13%22%13%
2539
16th to endDay
42%8%13%22%13%
2700
July1st to 15thDay
37%7%13%24%15%1
2483
16th to endDay
42%8%13%23%11%1
2384
August1st to 15thDay
40%7%16%21%13%1
2327
16th to endDay
38%8%16%25%9%
2434
September1st to 15thDay
45%7%13%23%9%
2136
16th to endDay
43%6%12%27%8%
1962
October1st to 15thDay
53%411%19%9%
1800
16th to endDay
64%7%13%9%4
1920
November1st to 15thDay
55%8%13%14%6%
1584
16th to endDay
66%8%12%9%3
1560
December1st to 15thDay
72%8%11%7%
1560
16th to endDay
70%6%10%8%2
1664
January1st to 15thNight
66%8%11%8%5%
2685
16th to endNight
67%8%9%10%2
2704
February1st to 15thNight
65%6%11%12%3
2482
16th to endNight
58%6%12%14%7%
2184
March1st to 15thNight
58%311%17%7%
2148
16th to endNight
44%411%21%15%1
2178
April1st to 15thNight
51%410%18%13%
1826
16th to endNight
45%410%18%18%2
1622
May1st to 15thNight
43%5%12%19%16%2
1569
16th to endNight
33%7%14%26%15%2
1497
June1st to 15thNight
40%6%12%23%15%
1416
16th to endNight
37%6%14%25%15%
1260
July1st to 15thNight
28%7%10%31%21%1
1245
16th to endNight
33%8%12%29%14%1
1519
August1st to 15thNight
27%9%20%26%14%
1609
16th to endNight
31%7%15%27%15%1
1755
September1st to 15thNight
36%6%16%26%13%1
1821
16th to endNight
37%7%12%29%12%
1997
October1st to 15thNight
46%8%11%20%12%
2160
16th to endNight
59%7%13%13%6%
2304
November1st to 15thNight
51%7%15%17%7%1
2599
16th to endNight
61%8%14%11%3
2730
December1st to 15thNight
69%7%12%7%2
2730
16th to endNight
74%6%9%6%3
2912

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
21%14%37%19%6%1
97
16th to endDay
32%11%29%25%1
144
February1st to 15thDay
23%13%44%18%
135
16th to endDay
25%21%33%19%
120
March1st to 15thDay
21%10%34%25%7%
327
16th to endDay
21%6%33%24%12%2
311
April1st to 15thDay
26%7%30%20%11%3
270
16th to endDay
22%10%22%23%14%5%
270
May1st to 15thDay
19%5%25%25%17%7%
288
16th to endDay
16%326%28%19%5%
331
June1st to 15thDay
21%5%18%31%20%3
334
16th to endDay
16%424%32%16%4
495
July1st to 15thDay
10%323%33%21%7%
417
16th to endDay
10%121%35%19%11%
326
August1st to 15thDay
9%118%25%27%16%
313
16th to endDay
12%218%22%25%17%
332
September1st to 15thDay
13%318%21%26%16%
315
16th to endDay
12%417%25%24%16%
314
October1st to 15thDay
20%6%27%24%13%7%
315
16th to endDay
30%10%28%22%8%
336
November1st to 15thDay
22%12%29%21%12%1
109
16th to endDay
28%15%40%11%4
90
December1st to 15thDay
22%18%30%21%6%1
90
16th to endDay
28%14%43%11%2
96
January1st to 15thNight
24%10%37%20%6%
780
16th to endNight
19%9%34%28%7%
832
February1st to 15thNight
20%10%37%25%4
764
16th to endNight
21%10%33%28%5%
683
March1st to 15thNight
22%10%33%26%6%
780
16th to endNight
19%7%31%28%12%
792
April1st to 15thNight
23%9%32%27%6%
718
16th to endNight
18%6%28%32%12%1
542
May1st to 15thNight
18%324%36%15%2
489
16th to endNight
12%427%40%16%
375
June1st to 15thNight
15%424%40%14%
360
16th to endNight
11%122%43%20%
360
July1st to 15thNight
7%217%49%22%1
340
16th to endNight
9%121%40%25%1
486
August1st to 15thNight
8%15%43%29%2
539
16th to endNight
11%117%35%29%3
609
September1st to 15thNight
15%320%31%22%6%
720
16th to endNight
14%5%17%31%24%5%
717
October1st to 15thNight
22%426%29%15%1
720
16th to endNight
26%10%31%23%6%
768
November1st to 15thNight
24%6%30%25%11%1
760
16th to endNight
23%15%29%24%7%
780
December1st to 15thNight
26%12%39%18%3
780
16th to endNight
27%12%34%20%3
832
Page generated at 2018-03-22 11:34:26. Version ac04

Copyright 2018 A. Danko


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