Camp Kawartha
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Camp Kawartha clear sky chart from 2005-11-05 to 2018-02-13.

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%
15333
14%
48827
8%
15300
37%
15300
17%
34419

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
14%
779
8%
2716
3%
776
21%
776
7%
2151
January16th to endNight
19%
832
11%
2747
5%
832
26%
832
10%
2131
February1st to 15thNight
15%
753
10%
2444
3%
750
23%
750
9%
1898
February16th to endNight
19%
631
14%
2009
4%
631
30%
631
13%
1468
March1st to 15thNight
20%
720
14%
2009
5%
720
28%
720
15%
1485
March16th to endNight
27%
768
20%
2097
9%
768
37%
768
23%
1426
April1st to 15thNight
23%
718
15%
1796
5%
718
28%
718
20%
1335
April16th to endNight
32%
603
19%
1683
8%
603
39%
603
25%
1139
May1st to 15thNight
38%
423
16%
1503
12%
423
45%
423
20%
980
May16th to endNight
43%
374
16%
1497
12%
374
54%
374
23%
875
June1st to 15thNight
38%
360
11%
1440
8%
360
49%
360
17%
904
June16th to endNight
47%
360
10%
1440
12%
360
52%
360
21%
885
July1st to 15thNight
52%
340
15%
1360
20%
340
58%
340
30%
710
July16th to endNight
50%
403
16%
1443
14%
379
57%
379
30%
798
August1st to 15thNight
56%
539
14%
1609
10%
536
60%
536
32%
988
August16th to endNight
53%
653
21%
1799
10%
653
59%
653
34%
1104
September1st to 15thNight
45%
720
18%
1800
9%
720
49%
720
31%
1209
September16th to endNight
50%
717
23%
1991
15%
717
54%
717
31%
1260
October1st to 15thNight
35%
720
15%
2160
10%
720
42%
720
19%
1508
October16th to endNight
20%
768
13%
2313
5%
768
29%
768
12%
1774
November1st to 15thNight
29%
760
16%
2599
13%
760
36%
760
16%
1788
November16th to endNight
21%
780
10%
2730
6%
780
28%
780
10%
2078
December1st to 15thNight
12%
780
6%
2730
2%
780
18%
780
7%
2183
December16th to endNight
11%
832
8%
2912
2%
832
18%
832
7%
2342

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
17%9%36%6%35%45%6%32%
49218
Night
16%9%36%5%34446%33%
49000
Cloud CoverDay
17%8%36%6%3445%6%32%
49228
Night
16%9%36%5%34446%34%
49005
TransparencyDay
50%6%12%18%10%1
48909
Night
50%6%12%19%10%
48827
SeeingDay
22%12%29%20%9%5%
5800
Night
21%12%30%23%10%1
15335

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
18%14%5%8%6%34335%25%
1552
16th to endDay
15%15%6%11%7%4434421%
1827
February1st to 15thDay
14%14%6%12%8%35%43421%
1683
16th to endDay
16%15%5%7%7%4442426%
1464
March1st to 15thDay
16%10%48%7%45%44428%
1939
16th to endDay
15%9%35%5%34345%38%
2127
April1st to 15thDay
23%9%245%24345%32%
2152
16th to endDay
20%7%245%24336%39%
2288
May1st to 15thDay
19%7%35%6%35%446%34%
2448
16th to endDay
14%6%25%6%2445%7%39%
2618
June1st to 15thDay
20%5%26%5%26%5%5%7%31%
2520
16th to endDay
15%6%35%5%36%5%6%7%34%
2520
July1st to 15thDay
11%4245%36%5%6%9%39%
2520
16th to endDay
9%5%25%7%46%6%6%9%35%
2624
August1st to 15thDay
11%5%36%5%45%5%6%7%37%
2340
16th to endDay
12%6%35%5%345%6%8%39%
2390
September1st to 15thDay
16%6%15%42445%6%41%
2160
16th to endDay
14%5%36%424446%43%
1965
October1st to 15thDay
21%8%36%5%3435%6%30%
1800
16th to endDay
27%8%37%5%33446%25%
1911
November1st to 15thDay
18%8%36%5%34446%33%
1586
16th to endDay
22%14%5%5%5%3445%6%23%
1560
December1st to 15thDay
18%16%6%10%6%3444420%
1560
16th to endDay
20%16%7%8%6%335%4320%
1664
January1st to 15thNight
20%15%5%9%6%35%43421%
2716
16th to endNight
15%14%5%10%6%34435%24%
2747
February1st to 15thNight
12%15%6%9%7%35%5%45%22%
2442
16th to endNight
16%11%47%6%345%5%6%28%
2009
March1st to 15thNight
18%9%46%6%3434432%
1997
16th to endNight
15%7%36%433335%41%
2097
April1st to 15thNight
19%9%45%424446%33%
1796
16th to endNight
16%6%245%3445%7%39%
1683
May1st to 15thNight
17%6%35%4245%5%6%38%
1503
16th to endNight
11%6%2442446%7%45%
1495
June1st to 15thNight
15%5%345%345%5%8%38%
1440
16th to endNight
11%5%25%5%36%5%48%40%
1440
July1st to 15thNight
7%3145%2445%6%52%
1440
16th to endNight
8%3234245%7%8%48%
1541
August1st to 15thNight
8%5%244235%6%10%47%
1620
16th to endNight
7%425%435%35%7%50%
1799
September1st to 15thNight
15%5%2442335%7%45%
1800
16th to endNight
15%5%24322346%48%
1991
October1st to 15thNight
19%6%36%433446%36%
2160
16th to endNight
23%10%35%6%33445%27%
2313
November1st to 15thNight
18%8%36%5%24447%35%
2599
16th to endNight
21%10%37%5%35%45%6%25%
2730
December1st to 15thNight
20%15%5%8%6%3445%6%19%
2730
16th to endNight
21%15%5%10%6%35%435%19%
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
19%14%5%8%6%24345%25%
1552
16th to endDay
14%16%6%10%7%4444421%
1827
February1st to 15thDay
14%14%6%12%8%35%44321%
1683
16th to endDay
17%14%6%7%7%4443426%
1464
March1st to 15thDay
16%10%49%7%35%445%28%
1950
16th to endDay
15%9%35%5%24345%38%
2126
April1st to 15thDay
23%9%35%42344433%
2152
16th to endDay
20%7%24424346%39%
2288
May1st to 15thDay
19%7%25%6%34346%34%
2448
16th to endDay
14%6%25%5%25%45%7%38%
2618
June1st to 15thDay
20%6%25%5%35%5%5%7%31%
2520
16th to endDay
15%5%35%6%36%5%6%8%34%
2520
July1st to 15thDay
11%4245%45%5%7%8%40%
2520
16th to endDay
10%5%26%6%46%6%7%8%35%
2624
August1st to 15thDay
11%5%26%6%35%5%6%8%37%
2340
16th to endDay
12%6%25%5%345%6%7%39%
2390
September1st to 15thDay
15%6%25%5%34446%42%
2160
16th to endDay
15%5%36%42435%6%43%
1965
October1st to 15thDay
21%7%37%43445%6%30%
1800
16th to endDay
27%8%37%5%33447%24%
1911
November1st to 15thDay
18%8%36%5%35%446%33%
1586
16th to endDay
21%13%46%435%45%6%23%
1560
December1st to 15thDay
18%16%6%9%7%24435%20%
1560
16th to endDay
20%17%6%7%7%3343320%
1664
January1st to 15thNight
20%15%5%9%6%34445%21%
2716
16th to endNight
14%15%6%9%7%34445%25%
2747
February1st to 15thNight
12%16%5%10%6%36%5%45%23%
2435
16th to endNight
16%11%37%6%445%5%6%28%
2009
March1st to 15thNight
18%10%46%5%3444432%
2009
16th to endNight
14%7%45%434345%41%
2097
April1st to 15thNight
20%8%35%424446%33%
1796
16th to endNight
16%7%245%2445%7%39%
1683
May1st to 15thNight
17%6%25%4345%5%5%39%
1503
16th to endNight
11%5%3443445%7%45%
1495
June1st to 15thNight
15%6%25%4345%5%7%38%
1440
16th to endNight
11%5%25%6%45%5%48%40%
1440
July1st to 15thNight
7%3145%2446%7%51%
1440
16th to endNight
9%3233345%7%8%49%
1541
August1st to 15thNight
9%4244235%5%9%47%
1620
16th to endNight
7%425%42446%7%49%
1799
September1st to 15thNight
14%5%245%2435%8%44%
1800
16th to endNight
15%5%24323346%48%
1991
October1st to 15thNight
19%6%36%5%33447%36%
2160
16th to endNight
23%10%46%6%34445%27%
2313
November1st to 15thNight
18%8%45%5%34447%34%
2599
16th to endNight
21%10%46%6%35%45%7%25%
2730
December1st to 15thNight
19%15%5%8%6%345%5%6%19%
2730
16th to endNight
21%14%6%9%6%34445%19%
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
61%411%14%7%
1553
16th to endDay
65%6%8%10%7%1
1827
February1st to 15thDay
65%410%14%4
1685
16th to endDay
61%49%12%11%
1464
March1st to 15thDay
57%5%13%15%6%1
1950
16th to endDay
47%5%8%20%15%3
2127
April1st to 15thDay
54%49%18%12%1
2152
16th to endDay
46%49%22%14%2
2288
May1st to 15thDay
50%6%9%18%14%1
2448
16th to endDay
43%6%13%20%13%1
2622
June1st to 15thDay
49%8%12%19%10%
2520
16th to endDay
45%8%13%19%11%
2520
July1st to 15thDay
37%7%14%25%13%
2371
16th to endDay
43%8%13%24%8%1
2459
August1st to 15thDay
42%9%15%19%11%1
2327
16th to endDay
39%7%14%25%10%1
2390
September1st to 15thDay
41%7%12%25%11%
2160
16th to endDay
42%6%12%28%10%
1965
October1st to 15thDay
52%6%11%18%9%
1800
16th to endDay
59%6%13%13%5%
1911
November1st to 15thDay
50%7%14%16%9%1
1586
16th to endDay
60%7%13%11%5%
1560
December1st to 15thDay
66%6%12%10%3
1560
16th to endDay
67%5%9%12%5%
1664
January1st to 15thNight
66%5%9%12%6%1
2716
16th to endNight
61%5%8%14%8%
2747
February1st to 15thNight
62%5%11%14%5%
2444
16th to endNight
54%6%12%18%8%
2009
March1st to 15thNight
54%5%11%18%8%
2009
16th to endNight
44%410%21%16%2
2097
April1st to 15thNight
50%6%8%18%14%1
1796
16th to endNight
42%6%10%20%18%2
1683
May1st to 15thNight
44%6%12%18%14%3
1503
16th to endNight
36%7%13%24%15%2
1497
June1st to 15thNight
42%7%12%20%15%
1440
16th to endNight
41%6%14%21%14%1
1440
July1st to 15thNight
28%6%13%29%20%
1360
16th to endNight
30%7%14%31%14%
1443
August1st to 15thNight
32%8%19%24%13%
1609
16th to endNight
31%8%13%30%14%1
1799
September1st to 15thNight
38%7%14%25%12%1
1800
16th to endNight
36%5%11%31%13%
1991
October1st to 15thNight
47%7%11%21%12%
2160
16th to endNight
58%6%11%15%7%
2313
November1st to 15thNight
49%5%13%18%11%1
2599
16th to endNight
57%8%13%14%5%
2730
December1st to 15thNight
64%7%11%12%3
2730
16th to endNight
66%6%9%10%6%
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
25%28%25%16%21
90
16th to endDay
38%15%31%11%2
134
February1st to 15thDay
37%28%30%3
126
16th to endDay
34%17%34%13%1
123
March1st to 15thDay
26%14%33%20%4
270
16th to endDay
24%15%32%16%7%2
288
April1st to 15thDay
28%16%31%14%8%1
270
16th to endDay
27%13%28%17%8%4
270
May1st to 15thDay
28%12%27%16%7%7%
288
16th to endDay
18%12%36%19%9%4
331
June1st to 15thDay
23%8%33%23%8%2
315
16th to endDay
19%9%29%25%12%3
315
July1st to 15thDay
13%6%29%27%14%7%
305
16th to endDay
8%8%32%27%15%6%
326
August1st to 15thDay
10%428%32%14%9%
313
16th to endDay
14%6%23%27%14%13%
332
September1st to 15thDay
15%8%25%20%15%13%
315
16th to endDay
16%9%21%25%15%11%
314
October1st to 15thDay
21%12%30%20%10%5%
315
16th to endDay
32%17%28%16%5%
334
November1st to 15thDay
24%14%30%24%6%2
150
16th to endDay
31%17%33%16%1
90
December1st to 15thDay
30%23%24%18%3
90
16th to endDay
33%21%37%6%1
96
January1st to 15thNight
28%21%29%14%5%
780
16th to endNight
22%16%32%23%3
832
February1st to 15thNight
21%20%37%18%2
753
16th to endNight
23%18%34%19%4
631
March1st to 15thNight
25%18%32%20%3
720
16th to endNight
19%13%33%21%10%1
768
April1st to 15thNight
26%14%31%22%5%
718
16th to endNight
20%11%31%25%9%1
603
May1st to 15thNight
21%6%30%27%12%2
423
16th to endNight
12%6%33%35%11%
375
June1st to 15thNight
16%8%30%31%11%
360
16th to endNight
11%5%28%39%14%
360
July1st to 15thNight
7%5%27%40%18%
340
16th to endNight
7%332%34%20%1
403
August1st to 15thNight
11%321%37%23%3
539
16th to endNight
10%424%31%26%2
653
September1st to 15thNight
17%5%26%27%19%3
720
16th to endNight
16%7%21%26%23%4
717
October1st to 15thNight
23%10%27%22%14%2
720
16th to endNight
30%14%29%20%5%
768
November1st to 15thNight
23%11%30%23%8%1
760
16th to endNight
28%15%30%19%6%
780
December1st to 15thNight
30%20%31%13%3
780
16th to endNight
30%15%34%15%3
832
Page generated at 2018-02-13 20:46:07. Version ac04

Copyright 2018 A. Danko


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