Saint-Felicien
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Saint-Felicien clear sky chart from 2005-11-06 to 2024-01-16.

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
29%
22606
11%
74944
7%
22558
34%
22558
14%
55360

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
19%
763
8%
2654
4%
760
24%
760
7%
2183
January11th to 20thNight
23%
744
10%
2602
6%
744
28%
744
10%
2023
January21st to endNight
34%
792
13%
2772
10%
792
40%
792
12%
2075
February1st to 10thNight
30%
720
13%
2520
8%
720
38%
720
14%
1840
February11th to 20thNight
25%
703
10%
2194
6%
700
31%
700
11%
1734
February21st to endNight
28%
592
15%
1776
9%
592
37%
592
15%
1317
March1st to 10thNight
28%
720
13%
2160
10%
720
33%
720
14%
1657
March11th to 20thNight
27%
720
14%
2116
8%
720
33%
720
14%
1596
March21st to endNight
27%
792
17%
1980
7%
792
32%
792
18%
1526
April1st to 10thNight
28%
720
11%
1800
5%
720
31%
720
15%
1444
April11th to 20thNight
32%
640
17%
1704
8%
640
37%
640
23%
1212
April21st to endNight
26%
540
16%
1620
8%
540
35%
540
19%
1144
May1st to 10thNight
28%
374
13%
1454
10%
374
38%
374
15%
991
May11th to 20thNight
33%
354
16%
1416
14%
354
47%
354
16%
934
May21st to endNight
24%
389
11%
1464
6%
388
36%
388
17%
973
June1st to 10thNight
33%
360
6%
1260
4%
360
36%
360
17%
874
June11th to 20thNight
32%
360
8%
1260
4%
360
36%
360
20%
809
June21st to endNight
39%
360
6%
1260
3%
360
40%
360
18%
849
July1st to 10thNight
34%
350
7%
1284
4%
350
40%
350
18%
843
July11th to 20thNight
44%
348
9%
1392
10%
348
48%
348
21%
841
July21st to endNight
46%
394
8%
1486
12%
372
51%
372
15%
1011
August1st to 10thNight
49%
358
11%
1422
11%
356
54%
356
18%
928
August11th to 20thNight
43%
430
13%
1494
10%
430
49%
430
20%
975
August21st to endNight
40%
719
15%
1907
8%
719
44%
719
25%
1321
September1st to 10thNight
40%
720
13%
1800
6%
720
44%
720
29%
1252
September11th to 20thNight
35%
720
13%
1908
6%
720
39%
720
24%
1327
September21st to endNight
32%
720
16%
1980
9%
720
37%
720
22%
1396
October1st to 10thNight
33%
720
18%
2060
10%
720
40%
720
22%
1412
October11th to 20thNight
25%
720
10%
2290
6%
720
30%
720
12%
1788
October21st to endNight
22%
792
9%
2574
6%
792
28%
792
11%
2004
November1st to 10thNight
21%
740
12%
2407
6%
740
29%
740
13%
1806
November11th to 20thNight
22%
760
11%
2602
7%
760
28%
760
11%
2013
November21st to endNight
18%
850
7%
2850
4%
850
22%
850
8%
2323
December1st to 10thNight
22%
850
7%
2850
4%
850
25%
850
9%
2300
December11th to 20thNight
24%
850
10%
3466
6%
849
30%
849
9%
2661
December21st to endNight
21%
922
7%
5160
5%
906
27%
906
5%
3978

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
16%10%48%7%46%5%6%7%28%
74554
Night
16%12%5%9%7%45%5%5%6%27%
75254
TransparencyDay
55%5%12%19%8%1
74257
Night
58%411%19%7%1
75086
SeeingDay
21%10%29%26%12%3
14029
Night
22%9%29%29%10%1
22619

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 10thDay
14%15%7%12%8%46%6%4418%
1507
11th to 20thDay
12%15%7%12%9%446%6%6%21%
1480
21st to endDay
8%12%6%10%9%47%5%6%7%26%
1584
February1st to 10thDay
6%11%6%10%11%7%9%7%6%7%21%
1440
11th to 20thDay
11%12%7%11%9%5%7%6%5%6%21%
1654
21st to endDay
11%12%5%10%8%5%6%5%7%7%25%
1480
March1st to 10thDay
14%13%6%10%8%45%45%5%27%
1797
11th to 20thDay
15%11%47%8%46%5%5%7%27%
1843
21st to endDay
14%11%49%7%345%6%7%29%
2373
April1st to 10thDay
16%14%5%10%8%44445%24%
2160
11th to 20thDay
17%8%46%6%445%5%6%35%
2204
21st to endDay
21%8%47%6%345%5%6%31%
2340
May1st to 10thDay
19%8%36%5%35%5%5%7%34%
2520
11th to 20thDay
17%7%46%5%35%45%7%37%
2478
21st to endDay
15%8%37%7%46%45%6%34%
2810
June1st to 10thDay
18%8%37%6%46%6%6%7%30%
2700
11th to 20thDay
15%7%36%7%45%5%6%8%34%
2700
21st to endDay
21%7%37%6%46%5%6%6%29%
2700
July1st to 10thDay
14%7%46%6%5%7%7%7%10%29%
2634
11th to 20thDay
12%6%36%7%5%7%7%7%9%29%
2520
21st to endDay
13%6%37%8%47%7%7%9%29%
2744
August1st to 10thDay
15%7%48%8%46%8%7%8%25%
2506
11th to 20thDay
14%7%36%8%46%7%7%7%31%
2388
21st to endDay
13%8%37%7%46%6%6%8%31%
2447
September1st to 10thDay
15%6%37%6%46%6%5%8%33%
2160
11th to 20thDay
16%8%36%7%35%5%5%8%35%
2051
21st to endDay
20%8%37%6%46%45%6%32%
1980
October1st to 10thDay
17%8%37%7%46%5%6%6%31%
1898
11th to 20thDay
24%13%5%9%8%45%5%46%18%
1670
21st to endDay
25%12%47%6%5%45%46%23%
1782
November1st to 10thDay
18%11%410%10%45%445%25%
1671
11th to 20thDay
17%13%7%9%9%45%5%5%5%22%
1574
21st to endDay
20%16%6%9%7%36%5%6%7%16%
1330
December1st to 10thDay
17%17%6%9%8%45%46%5%19%
1330
11th to 20thDay
21%15%5%8%6%43337%25%
1668
21st to endDay
16%15%6%10%10%5%6%6%5%5%16%
2431
January1st to 10thNight
14%20%7%12%9%5%5%445%15%
2654
11th to 20thNight
13%15%7%13%8%45%5%5%6%20%
2602
21st to endNight
8%12%7%12%9%5%7%6%7%6%21%
2772
February1st to 10thNight
10%11%6%10%8%7%6%5%6%7%25%
2520
11th to 20thNight
9%16%6%12%9%5%6%5%45%22%
2192
21st to endNight
10%13%6%10%6%46%6%6%6%27%
1776
March1st to 10thNight
14%13%6%10%8%36%5%5%6%24%
2150
11th to 20thNight
14%13%5%8%9%45%5%5%6%26%
2115
21st to endNight
14%14%6%8%6%3445%5%29%
1980
April1st to 10thNight
21%13%49%6%5%5%45%5%23%
1800
11th to 20thNight
18%9%36%6%45%5%5%7%34%
1704
21st to endNight
19%9%37%6%3445%5%34%
1620
May1st to 10thNight
20%9%37%6%45%445%34%
1454
11th to 20thNight
19%8%45%6%445%47%35%
1415
21st to endNight
20%8%35%5%44447%36%
1463
June1st to 10thNight
19%7%36%7%35%6%6%8%29%
1260
11th to 20thNight
15%7%45%6%25%5%6%7%38%
1260
21st to endNight
16%6%37%7%46%6%6%8%32%
1260
July1st to 10thNight
17%6%27%6%46%6%8%8%31%
1322
11th to 20thNight
11%6%36%6%37%47%9%38%
1440
21st to endNight
12%7%47%6%46%6%7%7%33%
1574
August1st to 10thNight
14%6%36%6%46%7%7%10%32%
1432
11th to 20thNight
16%8%36%6%345%6%8%35%
1494
21st to endNight
14%7%36%7%35%6%7%8%34%
1907
September1st to 10thNight
14%7%36%6%45%5%5%7%40%
1800
11th to 20thNight
18%7%36%5%35%45%6%38%
1908
21st to endNight
18%6%36%7%45%5%46%36%
1980
October1st to 10thNight
17%8%35%5%36%5%5%8%35%
2060
11th to 20thNight
25%12%47%6%35%5%46%23%
2290
21st to endNight
26%12%37%6%45%6%5%6%21%
2574
November1st to 10thNight
19%14%48%6%445%6%7%24%
2407
11th to 20thNight
18%11%6%10%7%45%6%5%6%22%
2602
21st to endNight
19%15%5%12%7%46%5%5%5%17%
2850
December1st to 10thNight
17%16%7%11%9%44445%19%
2850
11th to 20thNight
20%14%6%8%6%45%5%5%5%22%
3531
21st to endNight
14%19%7%12%8%4444421%
5236

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
69%411%12%4
1508
11th to 20thDay
63%49%16%7%
1480
21st to endDay
58%36%21%11%1
1584
February1st to 10thDay
60%6%8%16%9%1
1440
11th to 20thDay
63%5%8%14%9%
1663
21st to endDay
57%5%9%20%8%1
1480
March1st to 10thDay
59%37%18%12%1
1800
11th to 20thDay
57%49%19%11%1
1843
21st to endDay
53%410%20%11%2
2373
April1st to 10thDay
63%49%13%8%2
2160
11th to 20thDay
50%49%24%12%2
2204
21st to endDay
53%5%8%19%13%1
2340
May1st to 10thDay
50%49%20%15%2
2520
11th to 20thDay
48%39%23%14%2
2482
21st to endDay
50%6%7%19%16%1
2810
June1st to 10thDay
51%5%9%21%13%2
2700
11th to 20thDay
47%5%11%23%12%2
2700
21st to endDay
53%5%11%19%10%
2700
July1st to 10thDay
48%6%16%24%5%
2562
11th to 20thDay
48%6%16%24%7%
2445
21st to endDay
51%6%17%22%5%
2591
August1st to 10thDay
52%7%18%20%2
2492
11th to 20thDay
48%7%19%20%6%
2388
21st to endDay
50%5%15%24%6%
2447
September1st to 10thDay
49%416%22%8%
2160
11th to 20thDay
47%6%17%22%7%
2051
21st to endDay
53%5%14%21%6%
1980
October1st to 10thDay
53%5%15%20%7%2
1898
11th to 20thDay
68%412%13%3
1670
21st to endDay
62%5%13%15%5%
1782
November1st to 10thDay
63%411%15%5%1
1671
11th to 20thDay
64%311%17%4
1574
21st to endDay
68%413%13%3
1330
December1st to 10thDay
67%411%15%3
1330
11th to 20thDay
62%37%22%5%
1668
21st to endDay
70%39%10%8%
2431
January1st to 10thNight
73%39%12%4
2654
11th to 20thNight
66%39%15%7%
2602
21st to endNight
61%48%19%8%
2772
February1st to 10thNight
59%39%20%9%
2520
11th to 20thNight
65%49%15%7%
2194
21st to endNight
58%39%21%8%
1776
March1st to 10thNight
61%47%19%8%1
2160
11th to 20thNight
60%38%17%11%1
2116
21st to endNight
57%47%20%11%1
1980
April1st to 10thNight
64%38%15%7%3
1800
11th to 20thNight
51%38%26%12%
1704
21st to endNight
52%38%21%13%2
1620
May1st to 10thNight
54%39%15%16%3
1454
11th to 20thNight
52%38%21%14%2
1416
21st to endNight
50%48%22%15%1
1464
June1st to 10thNight
52%5%11%22%10%1
1260
11th to 20thNight
45%5%10%23%13%4
1260
21st to endNight
50%5%13%21%12%
1260
July1st to 10thNight
48%5%14%25%7%1
1284
11th to 20thNight
42%5%16%28%8%1
1392
21st to endNight
51%7%13%24%6%
1486
August1st to 10thNight
46%7%22%22%2
1422
11th to 20thNight
47%5%19%21%7%
1494
21st to endNight
45%6%18%27%5%
1907
September1st to 10thNight
45%416%26%10%1
1800
11th to 20thNight
48%318%24%6%
1908
21st to endNight
49%5%14%25%7%
1980
October1st to 10thNight
47%5%14%23%9%1
2060
11th to 20thNight
64%411%16%5%
2290
21st to endNight
64%411%14%6%
2574
November1st to 10thNight
60%414%17%6%
2407
11th to 20thNight
64%413%14%5%
2602
21st to endNight
69%410%13%3
2850
December1st to 10thNight
69%312%13%3
2850
11th to 20thNight
64%39%17%6%
3532
21st to endNight
69%211%12%5%1
5236

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
22%9%30%29%8%1
180
11th to 20thDay
16%10%28%30%14%2
170
21st to endDay
15%5%24%35%16%4
176
February1st to 10thDay
9%9%41%27%11%2
160
11th to 20thDay
19%14%33%27%7%
323
21st to endDay
18%10%39%23%9%1
346
March1st to 10thDay
24%11%28%25%11%1
420
11th to 20thDay
22%11%32%24%9%1
420
21st to endDay
22%11%31%25%10%1
462
April1st to 10thDay
22%14%29%25%8%2
420
11th to 20thDay
22%11%26%27%12%2
412
21st to endDay
24%12%29%24%11%1
420
May1st to 10thDay
24%13%29%25%7%2
423
11th to 20thDay
19%11%30%24%13%2
447
21st to endDay
19%13%33%24%10%1
570
June1st to 10thDay
22%9%30%25%11%3
630
11th to 20thDay
18%9%29%31%11%3
630
21st to endDay
22%7%23%30%14%4
630
July1st to 10thDay
17%7%32%30%11%3
557
11th to 20thDay
18%7%27%27%16%5%
444
21st to endDay
14%6%25%30%22%3
488
August1st to 10thDay
15%8%22%31%17%7%
446
11th to 20thDay
16%6%22%31%17%9%
439
21st to endDay
16%8%31%22%15%8%
495
September1st to 10thDay
19%8%30%22%16%5%
450
11th to 20thDay
17%12%25%28%15%3
450
21st to endDay
21%12%26%21%15%5%
450
October1st to 10thDay
19%12%29%22%12%5%
450
11th to 20thDay
30%9%31%18%9%3
385
21st to endDay
30%11%30%21%7%1
396
November1st to 10thDay
25%17%32%20%5%1
365
11th to 20thDay
26%14%30%22%5%2
237
21st to endDay
32%9%28%22%7%2
180
December1st to 10thDay
22%9%18%28%18%4
180
11th to 20thDay
25%13%29%24%6%3
180
21st to endDay
27%13%26%22%11%2
198
January1st to 10thNight
24%8%30%29%9%1
763
11th to 20thNight
21%10%29%30%10%
744
21st to endNight
14%7%26%40%12%1
792
February1st to 10thNight
14%7%35%32%11%1
720
11th to 20thNight
19%8%33%32%7%1
703
21st to endNight
18%10%32%31%8%1
592
March1st to 10thNight
20%10%30%32%8%
720
11th to 20thNight
22%14%28%27%8%1
720
21st to endNight
23%11%30%30%7%
792
April1st to 10thNight
28%10%24%31%7%1
720
11th to 20thNight
23%11%29%30%8%
640
21st to endNight
25%10%32%28%5%
540
May1st to 10thNight
25%7%30%30%7%
374
11th to 20thNight
22%9%30%28%10%
354
21st to endNight
22%8%40%22%7%1
389
June1st to 10thNight
22%8%29%32%8%1
360
11th to 20thNight
16%6%34%31%11%1
360
21st to endNight
17%8%23%39%12%1
360
July1st to 10thNight
18%7%31%30%13%
350
11th to 20thNight
12%331%39%15%1
348
21st to endNight
15%426%43%13%1
394
August1st to 10thNight
14%422%43%16%1
358
11th to 20thNight
19%5%24%33%17%1
430
21st to endNight
18%9%26%29%16%3
719
September1st to 10thNight
17%6%28%34%13%1
720
11th to 20thNight
23%8%27%29%11%2
720
21st to endNight
22%6%33%27%10%2
720
October1st to 10thNight
21%6%33%29%10%1
720
11th to 20thNight
34%8%26%22%10%1
720
21st to endNight
34%9%26%22%8%1
792
November1st to 10thNight
29%14%28%21%7%1
740
11th to 20thNight
25%12%32%22%8%1
760
21st to endNight
28%10%30%25%6%1
850
December1st to 10thNight
26%10%26%28%10%1
850
11th to 20thNight
24%11%29%25%10%2
850
21st to endNight
24%11%27%29%8%1
935
Page generated at 2024-01-13 09:37:53. Version ac07

Copyright 2024 Attilla Danko


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