Kapuskasing
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Kapuskasing clear sky chart from 2005-11-05 to 2017-09-22.

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
26%
15306
9%
46841
6%
15271
30%
15271
13%
36512

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
18%
898
4%
2685
3%
895
19%
895
6%
2341
January16th to endNight
25%
960
6%
2727
3%
960
28%
960
8%
2321
February1st to 15thNight
33%
755
8%
2336
6%
752
36%
752
11%
1888
February16th to endNight
25%
631
8%
1991
6%
631
27%
631
10%
1617
March1st to 15thNight
23%
718
12%
2077
8%
718
28%
718
14%
1617
March16th to endNight
31%
768
14%
2112
9%
768
36%
768
18%
1575
April1st to 15thNight
27%
575
12%
1717
6%
575
32%
575
16%
1277
April16th to endNight
30%
540
15%
1620
10%
540
37%
540
19%
1161
May1st to 15thNight
30%
450
13%
1509
9%
450
37%
450
16%
1072
May16th to endNight
33%
375
9%
1310
8%
374
36%
374
15%
932
June1st to 15thNight
34%
360
4%
1260
4%
360
36%
360
17%
866
June16th to endNight
35%
360
5%
1260
3%
360
36%
360
20%
825
July1st to 15thNight
34%
340
6%
1190
3%
340
38%
340
21%
774
July16th to endNight
39%
418
11%
1279
10%
393
41%
393
21%
846
August1st to 15thNight
46%
539
11%
1548
7%
536
51%
536
24%
1059
August16th to endNight
40%
573
16%
1719
11%
573
44%
573
26%
1138
September1st to 15thNight
35%
651
10%
1815
5%
651
38%
651
20%
1317
September16th to endNight
33%
685
13%
1892
8%
685
35%
685
21%
1350
October1st to 15thNight
24%
660
13%
1952
7%
660
31%
660
15%
1469
October16th to endNight
22%
704
6%
2255
6%
704
23%
704
7%
1914
November1st to 15thNight
14%
700
8%
2421
4%
700
19%
700
7%
2013
November16th to endNight
14%
786
6%
2586
3%
786
17%
786
6%
2230
December1st to 15thNight
12%
900
4%
2700
1%
900
14%
900
6%
2378
December16th to endNight
16%
960
5%
2880
3%
960
18%
960
6%
2532

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
20%12%47%6%35%445%25%
48065
Night
18%13%5%8%6%35%445%24%
46994
TransparencyDay
60%5%10%17%6%
47733
Night
62%5%10%15%5%
46844
SeeingDay
26%10%30%20%9%2
6055
Night
25%9%29%24%9%1
15310

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
14%16%7%11%8%45%6%5%5%12%
1253
16th to endDay
13%15%6%10%8%47%7%7%5%11%
1496
February1st to 15thDay
7%12%7%10%8%411%7%5%5%17%
1524
16th to endDay
10%15%6%11%6%5%8%5%45%18%
1482
March1st to 15thDay
13%14%5%9%7%37%5%4423%
1872
16th to endDay
15%13%47%5%34435%30%
2112
April1st to 15thDay
21%15%47%5%3434425%
2241
16th to endDay
18%14%46%423345%31%
2340
May1st to 15thDay
19%11%36%7%34445%27%
2439
16th to endDay
25%9%35%5%25%446%27%
2804
June1st to 15thDay
22%7%36%5%33446%33%
2700
16th to endDay
22%6%35%5%25%45%7%30%
2700
July1st to 15thDay
23%7%25%435%5%6%7%27%
2700
16th to endDay
19%6%36%5%35%5%5%7%30%
2802
August1st to 15thDay
20%7%26%6%35%6%5%7%29%
2403
16th to endDay
20%6%35%6%35%45%6%31%
2483
September1st to 15thDay
23%10%35%5%24346%30%
2130
16th to endDay
27%9%35%423336%31%
1881
October1st to 15thDay
24%16%35%42324427%
1678
16th to endDay
28%24%5%7%5%2323313%
1614
November1st to 15thDay
23%17%7%9%5%2333319%
1436
16th to endDay
22%21%7%10%5%3443312%
1371
December1st to 15thDay
17%18%8%12%7%5%45%4411%
1260
16th to endDay
15%19%8%11%9%47%44310%
1344
January1st to 15thNight
15%19%7%11%8%47%6%4410%
2685
16th to endNight
14%15%6%9%9%5%7%8%5%412%
2727
February1st to 15thNight
8%11%6%11%9%8%8%6%5%5%18%
2336
16th to endNight
10%20%7%10%8%35%6%4417%
1991
March1st to 15thNight
16%12%5%9%7%345%3425%
2065
16th to endNight
12%13%37%6%45%445%30%
2112
April1st to 15thNight
21%12%445%33435%29%
1717
16th to endNight
19%11%45%5%2343435%
1620
May1st to 15thNight
18%10%37%5%45%446%31%
1509
16th to endNight
23%8%35%413447%31%
1309
June1st to 15thNight
22%9%34423436%34%
1260
16th to endNight
20%5%25%4245%5%7%36%
1260
July1st to 15thNight
20%435%434347%37%
1260
16th to endNight
15%5%26%5%35%5%49%36%
1366
August1st to 15thNight
14%6%245%35%47%8%37%
1557
16th to endNight
17%5%2442445%8%39%
1719
September1st to 15thNight
23%7%24434446%35%
1815
16th to endNight
24%7%24423346%35%
1892
October1st to 15thNight
21%13%35%5%2445%5%28%
1952
16th to endNight
27%21%5%7%5%23335%14%
2255
November1st to 15thNight
26%17%6%7%42333418%
2421
16th to endNight
23%18%8%10%6%3433313%
2586
December1st to 15thNight
14%22%9%13%7%45%43311%
2700
16th to endNight
17%18%7%10%11%46%43410%
2880

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
71%39%13%2
1254
16th to endDay
69%37%12%5%
1496
February1st to 15thDay
65%6%9%13%5%
1526
16th to endDay
66%410%13%4
1482
March1st to 15thDay
62%49%15%7%
1883
16th to endDay
55%38%20%10%
2112
April1st to 15thDay
61%35%18%9%1
2241
16th to endDay
54%49%18%11%1
2340
May1st to 15thDay
58%5%8%16%10%1
2439
16th to endDay
57%5%11%19%6%
2808
June1st to 15thDay
51%5%8%19%12%1
2700
16th to endDay
52%5%11%21%9%
2700
July1st to 15thDay
51%7%12%22%6%
2541
16th to endDay
52%6%14%22%2
2626
August1st to 15thDay
52%7%18%18%3
2388
16th to endDay
52%7%15%19%5%
2483
September1st to 15thDay
55%5%15%19%4
2130
16th to endDay
55%5%12%20%5%
1881
October1st to 15thDay
60%415%13%5%
1678
16th to endDay
77%38%7%2
1614
November1st to 15thDay
71%49%11%3
1436
16th to endDay
77%38%8%1
1371
December1st to 15thDay
75%49%7%2
1260
16th to endDay
78%36%7%3
1344
January1st to 15thNight
76%5%7%9%1
2685
16th to endNight
71%5%8%11%2
2727
February1st to 15thNight
65%5%11%13%4
2338
16th to endNight
68%49%13%4
1991
March1st to 15thNight
62%39%15%8%
2077
16th to endNight
55%39%18%11%1
2112
April1st to 15thNight
56%48%16%12%2
1717
16th to endNight
52%48%17%15%1
1620
May1st to 15thNight
53%47%19%11%2
1509
16th to endNight
52%6%10%20%8%
1311
June1st to 15thNight
51%5%8%19%12%2
1260
16th to endNight
45%5%13%22%11%1
1260
July1st to 15thNight
44%5%12%25%11%
1190
16th to endNight
44%7%14%27%5%
1279
August1st to 15thNight
42%8%16%26%5%
1548
16th to endNight
42%6%19%27%4
1719
September1st to 15thNight
51%5%15%20%7%
1815
16th to endNight
49%5%16%24%3
1892
October1st to 15thNight
57%5%13%18%5%
1952
16th to endNight
73%410%9%2
2255
November1st to 15thNight
70%6%10%9%2
2421
16th to endNight
75%49%8%2
2586
December1st to 15thNight
78%47%8%1
2700
16th to endNight
77%47%7%2
2880

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%16%28%26%5%1
60
16th to endDay
43%423%24%3
89
February1st to 15thDay
16%13%37%30%2
90
16th to endDay
33%17%40%7%1
81
March1st to 15thDay
19%16%36%22%4
173
16th to endDay
21%10%34%22%9%1
288
April1st to 15thDay
26%13%28%24%5%1
270
16th to endDay
27%14%26%18%8%4
270
May1st to 15thDay
26%12%31%17%8%2
306
16th to endDay
31%9%31%17%7%1
517
June1st to 15thDay
29%10%29%16%11%2
495
16th to endDay
24%9%30%23%10%1
495
July1st to 15thDay
22%11%33%21%9%2
475
16th to endDay
20%6%31%26%10%4
515
August1st to 15thDay
23%5%26%23%16%5%
376
16th to endDay
23%8%28%20%12%6%
332
September1st to 15thDay
29%8%29%19%10%2
315
16th to endDay
31%6%29%20%9%2
278
October1st to 15thDay
33%9%28%19%7%2
255
16th to endDay
41%11%26%15%31
126
November1st to 15thDay
29%16%41%9%3
65
16th to endDay
45%16%25%8%5%
60
December1st to 15thDay
35%10%31%13%10%
60
16th to endDay
21%14%46%15%1
64
January1st to 15thNight
26%12%30%22%6%1
900
16th to endNight
23%9%29%26%9%1
960
February1st to 15thNight
14%7%31%32%11%1
755
16th to endNight
22%9%30%26%11%
631
March1st to 15thNight
24%12%30%20%9%1
720
16th to endNight
19%9%32%27%9%1
768
April1st to 15thNight
28%11%27%24%7%1
575
16th to endNight
24%10%28%26%9%1
540
May1st to 15thNight
24%7%31%28%7%
450
16th to endNight
28%6%25%29%8%1
375
June1st to 15thNight
27%8%25%24%12%1
360
16th to endNight
20%6%33%27%11%
360
July1st to 15thNight
22%5%34%27%9%1
340
16th to endNight
17%5%29%30%15%1
418
August1st to 15thNight
16%226%33%17%3
539
16th to endNight
21%429%27%14%2
573
September1st to 15thNight
28%5%26%26%12%1
651
16th to endNight
29%7%25%25%10%1
685
October1st to 15thNight
31%8%31%21%5%1
660
16th to endNight
38%9%20%21%9%1
704
November1st to 15thNight
36%13%27%16%5%
700
16th to endNight
35%9%29%17%7%
786
December1st to 15thNight
25%12%35%19%6%
900
16th to endNight
27%10%30%19%9%3
960
Page generated at 2017-09-23 06:43:38. Version ac04

Copyright 2017 A. Danko


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