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 2019-06-19.

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%
17618
9%
53935
6%
17583
30%
17583
13%
41984

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%
1048
5%
3135
3%
1045
21%
1045
7%
2701
January16th to endNight
25%
1120
6%
3181
2%
1120
29%
1120
9%
2688
February1st to 15thNight
33%
883
9%
2734
6%
880
36%
880
12%
2187
February16th to endNight
23%
735
8%
2319
5%
735
26%
735
11%
1866
March1st to 15thNight
24%
838
12%
2423
8%
838
28%
838
14%
1898
March16th to endNight
32%
896
15%
2464
9%
896
36%
896
19%
1806
April1st to 15thNight
26%
671
13%
2004
6%
671
32%
671
17%
1489
April16th to endNight
31%
624
14%
1870
9%
624
37%
624
19%
1334
May1st to 15thNight
30%
526
14%
1762
10%
526
39%
526
17%
1236
May16th to endNight
33%
439
9%
1534
9%
438
37%
438
16%
1075
June1st to 15thNight
34%
420
6%
1470
5%
420
36%
420
17%
997
June16th to endNight
36%
398
5%
1393
3%
398
37%
398
21%
897
July1st to 15thNight
33%
370
7%
1295
4%
370
37%
370
21%
840
July16th to endNight
40%
453
10%
1394
9%
428
42%
428
20%
934
August1st to 15thNight
46%
575
12%
1649
8%
572
51%
572
24%
1121
August16th to endNight
41%
621
16%
1863
11%
621
45%
621
26%
1231
September1st to 15thNight
34%
705
13%
1966
6%
705
39%
705
22%
1405
September16th to endNight
31%
777
13%
2145
7%
777
34%
777
20%
1552
October1st to 15thNight
23%
780
12%
2307
6%
780
30%
780
15%
1746
October16th to endNight
21%
832
6%
2665
5%
832
22%
832
7%
2266
November1st to 15thNight
15%
820
7%
2835
4%
820
19%
820
7%
2375
November16th to endNight
14%
917
5%
3017
3%
917
16%
917
5%
2606
December1st to 15thNight
13%
1050
4%
3150
1%
1050
15%
1050
6%
2783
December16th to endNight
18%
1120
6%
3360
3%
1120
20%
1120
6%
2951

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
19%12%47%6%35%445%25%
54810
Night
18%13%5%8%6%35%445%24%
54088
TransparencyDay
59%5%10%17%6%
54478
Night
61%5%10%15%6%
53938
SeeingDay
26%11%31%20%8%2
8256
Night
25%9%29%24%9%1
17622

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%17%6%11%8%45%6%7%5%12%
1463
16th to endDay
12%14%6%10%9%5%7%7%8%412%
1746
February1st to 15thDay
8%12%7%10%8%410%7%5%5%19%
1786
16th to endDay
11%16%6%10%6%5%8%6%5%5%18%
1726
March1st to 15thDay
13%14%5%9%7%36%5%45%23%
2186
16th to endDay
14%13%47%5%34446%32%
2464
April1st to 15thDay
20%14%48%5%34345%25%
2616
16th to endDay
18%13%36%423345%33%
2695
May1st to 15thDay
18%11%37%7%34445%27%
2846
16th to endDay
24%9%35%5%2445%6%28%
3284
June1st to 15thDay
22%7%35%5%23446%34%
3150
16th to endDay
21%6%35%5%3445%7%32%
2975
July1st to 15thDay
21%7%25%435%5%6%7%29%
2925
16th to endDay
19%6%36%5%35%5%5%7%31%
3039
August1st to 15thDay
20%7%25%6%35%5%5%7%30%
2555
16th to endDay
21%6%25%6%35%45%6%32%
2691
September1st to 15thDay
23%9%25%424346%32%
2308
16th to endDay
28%10%25%423335%29%
2145
October1st to 15thDay
25%15%35%323345%26%
1983
16th to endDay
28%24%5%7%5%3323313%
1908
November1st to 15thDay
22%18%7%10%5%3333317%
1682
16th to endDay
22%21%7%11%6%3433212%
1599
December1st to 15thDay
17%18%8%13%8%5%444410%
1470
16th to endDay
14%18%8%11%10%5%8%44310%
1568
January1st to 15thNight
15%18%6%11%8%37%7%4410%
3135
16th to endNight
13%15%6%9%9%6%7%8%6%412%
3181
February1st to 15thNight
9%11%6%11%8%7%8%6%5%5%20%
2734
16th to endNight
10%19%7%10%8%35%5%4419%
2319
March1st to 15thNight
16%12%5%9%8%35%5%4424%
2411
16th to endNight
12%12%37%6%45%445%32%
2464
April1st to 15thNight
20%11%45%6%34445%29%
2004
16th to endNight
19%10%45%5%2343436%
1870
May1st to 15thNight
17%10%36%5%35%446%32%
1762
16th to endNight
22%8%35%414447%33%
1533
June1st to 15thNight
23%8%34323436%35%
1470
16th to endNight
19%4244245%6%7%37%
1393
July1st to 15thNight
19%5%35%434347%37%
1365
16th to endNight
15%6%26%6%35%5%49%35%
1481
August1st to 15thNight
14%6%245%25%46%8%38%
1658
16th to endNight
17%5%2443445%8%40%
1863
September1st to 15thNight
22%6%24434436%37%
1966
16th to endNight
25%7%24423346%35%
2145
October1st to 15thNight
22%12%36%5%2435%5%27%
2307
16th to endNight
27%20%5%7%5%23335%14%
2665
November1st to 15thNight
24%17%7%8%6%23445%16%
2835
16th to endNight
22%18%7%11%7%3433313%
3017
December1st to 15thNight
13%21%9%13%8%45%43311%
3150
16th to endNight
16%17%7%10%12%5%6%5%3410%
3360

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
70%38%13%3
1464
16th to endDay
68%37%12%7%
1746
February1st to 15thDay
63%6%9%15%4
1788
16th to endDay
65%5%10%14%4
1726
March1st to 15thDay
62%410%14%7%
2197
16th to endDay
53%39%20%11%1
2464
April1st to 15thDay
61%36%18%8%1
2616
16th to endDay
51%49%20%12%1
2695
May1st to 15thDay
57%5%8%17%10%
2846
16th to endDay
55%5%10%20%6%
3288
June1st to 15thDay
50%5%8%21%12%1
3150
16th to endDay
50%5%11%22%9%
2975
July1st to 15thDay
50%6%12%22%7%
2766
16th to endDay
52%6%14%22%3
2863
August1st to 15thDay
52%7%17%18%3
2540
16th to endDay
51%7%15%19%5%
2691
September1st to 15thDay
53%5%14%20%4
2308
16th to endDay
57%5%12%19%4
2145
October1st to 15thDay
61%5%14%14%5%
1983
16th to endDay
77%37%8%2
1908
November1st to 15thDay
73%49%10%2
1682
16th to endDay
78%37%8%1
1599
December1st to 15thDay
77%49%7%1
1470
16th to endDay
77%36%8%3
1568
January1st to 15thNight
74%5%8%9%2
3135
16th to endNight
70%5%8%12%3
3181
February1st to 15thNight
64%5%11%14%4
2736
16th to endNight
66%49%14%4
2319
March1st to 15thNight
62%39%14%8%
2423
16th to endNight
53%39%18%12%1
2464
April1st to 15thNight
56%48%16%11%2
2004
16th to endNight
51%48%17%15%2
1870
May1st to 15thNight
51%47%22%11%1
1762
16th to endNight
51%6%10%21%10%
1535
June1st to 15thNight
50%5%8%20%13%2
1470
16th to endNight
43%6%13%23%12%1
1393
July1st to 15thNight
44%5%12%26%11%
1295
16th to endNight
45%7%15%26%5%
1394
August1st to 15thNight
42%8%15%27%5%
1649
16th to endNight
41%6%18%27%5%
1863
September1st to 15thNight
49%5%14%22%7%
1966
16th to endNight
51%5%15%24%3
2145
October1st to 15thNight
58%5%12%18%5%
2307
16th to endNight
73%49%9%2
2665
November1st to 15thNight
71%5%10%9%2
2835
16th to endNight
76%48%8%2
3017
December1st to 15thNight
78%47%7%1
3150
16th to endNight
77%47%7%3
3360

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
25%16%31%21%4
120
16th to endDay
27%12%26%24%7%1
179
February1st to 15thDay
17%16%42%21%2
180
16th to endDay
28%23%36%10%
159
March1st to 15thDay
20%13%35%23%42
277
16th to endDay
20%12%35%22%7%1
416
April1st to 15thDay
24%16%29%21%5%1
390
16th to endDay
25%15%27%18%9%3
379
May1st to 15thDay
24%13%35%15%6%3
429
16th to endDay
30%11%33%17%6%1
677
June1st to 15thDay
28%10%30%18%9%1
645
16th to endDay
22%9%32%24%10%1
587
July1st to 15thDay
21%13%33%21%8%1
550
16th to endDay
19%5%31%28%10%3
595
August1st to 15thDay
23%426%23%16%5%
426
16th to endDay
24%9%27%20%12%5%
396
September1st to 15thDay
27%9%31%19%9%2
375
16th to endDay
35%7%29%17%7%1
374
October1st to 15thDay
36%10%26%18%6%1
375
16th to endDay
44%12%24%15%21
228
November1st to 15thDay
35%16%31%12%3
131
16th to endDay
41%14%29%11%3
120
December1st to 15thDay
30%10%30%20%6%
120
16th to endDay
21%14%37%17%44
128
January1st to 15thNight
26%12%30%22%6%1
1050
16th to endNight
21%10%29%26%10%1
1120
February1st to 15thNight
15%8%31%31%11%1
883
16th to endNight
21%10%33%24%9%
735
March1st to 15thNight
24%12%31%21%9%1
840
16th to endNight
18%10%32%27%9%1
896
April1st to 15thNight
25%12%29%22%7%1
671
16th to endNight
24%9%28%26%9%1
624
May1st to 15thNight
23%8%32%27%7%
526
16th to endNight
26%6%27%29%7%1
439
June1st to 15thNight
27%8%25%25%11%1
420
16th to endNight
19%5%34%29%11%
398
July1st to 15thNight
21%6%34%26%9%1
370
16th to endNight
18%5%28%30%16%1
453
August1st to 15thNight
16%227%32%17%2
575
16th to endNight
21%428%27%15%2
621
September1st to 15thNight
27%5%27%26%12%1
705
16th to endNight
30%7%27%23%9%1
777
October1st to 15thNight
31%8%31%21%5%1
780
16th to endNight
37%10%20%21%8%1
832
November1st to 15thNight
34%13%28%16%6%
820
16th to endNight
34%10%29%17%6%
917
December1st to 15thNight
25%11%35%20%6%1
1050
16th to endNight
25%10%30%20%9%3
1120
Page generated at 2019-06-20 08:02:27. Version ac04

Copyright 2019 A. Danko


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