Kouchibouguac National Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Kouchibouguac National Park clear sky chart from 2005-11-05 to 2018-01-12.

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
28%
15337
14%
48298
6%
15295
36%
15295
18%
33641

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
17%
806
13%
2852
3%
802
29%
802
14%
1965
January16th to endNight
25%
775
18%
2604
6%
775
41%
775
18%
1729
February1st to 15thNight
23%
704
13%
2286
6%
701
32%
701
18%
1592
February16th to endNight
22%
631
12%
2042
4%
631
31%
631
14%
1508
March1st to 15thNight
23%
720
16%
2003
6%
720
33%
720
18%
1477
March16th to endNight
25%
768
17%
2112
7%
768
33%
768
19%
1541
April1st to 15thNight
27%
558
13%
1769
8%
558
33%
558
16%
1290
April16th to endNight
32%
540
17%
1620
10%
540
39%
540
21%
1129
May1st to 15thNight
35%
540
11%
1511
7%
540
39%
540
20%
1096
May16th to endNight
34%
551
10%
1486
4%
550
39%
550
20%
1097
June1st to 15thNight
34%
360
8%
1260
6%
360
37%
360
15%
886
June16th to endNight
36%
360
7%
1260
5%
360
40%
360
16%
889
July1st to 15thNight
48%
340
11%
1190
8%
340
53%
340
24%
733
July16th to endNight
43%
481
9%
1363
7%
451
46%
451
20%
960
August1st to 15thNight
49%
539
9%
1608
9%
535
50%
535
21%
1097
August16th to endNight
43%
573
15%
1743
8%
573
49%
573
25%
1124
September1st to 15thNight
35%
552
16%
1812
10%
552
44%
552
25%
1145
September16th to endNight
39%
717
23%
1999
13%
717
46%
717
32%
1218
October1st to 15thNight
33%
720
20%
2160
9%
720
42%
720
27%
1387
October16th to endNight
21%
768
16%
2343
5%
768
32%
768
17%
1661
November1st to 15thNight
23%
804
14%
2657
7%
804
33%
804
16%
1878
November16th to endNight
22%
825
13%
2730
5%
825
32%
825
14%
1958
December1st to 15thNight
11%
825
13%
2768
1%
825
24%
825
12%
1987
December16th to endNight
13%
880
13%
3120
2%
880
26%
880
11%
2294

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%8%35%5%3445%6%32%
49052
Night
19%8%36%5%34446%33%
48459
TransparencyDay
50%5%12%21%9%
48732
Night
51%412%21%9%
48298
SeeingDay
23%7%28%25%12%2
7420
Night
24%8%30%25%9%
15337

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%14%35%5%24337%33%
1330
16th to endDay
15%9%47%423345%38%
1616
February1st to 15thDay
12%11%37%5%35%5%7%6%31%
1575
16th to endDay
15%13%5%7%6%35%346%27%
1431
March1st to 15thDay
19%11%46%5%2444431%
1945
16th to endDay
17%10%5%6%5%24445%34%
2112
April1st to 15thDay
18%9%45%6%35%46%7%28%
2178
16th to endDay
25%8%24433336%34%
2340
May1st to 15thDay
24%8%35%5%24445%30%
2440
16th to endDay
22%9%36%42445%6%29%
2638
June1st to 15thDay
26%9%35%5%3445%7%26%
2700
16th to endDay
23%6%35%6%35%5%47%28%
2700
July1st to 15thDay
14%6%25%5%35%6%7%9%33%
2700
16th to endDay
16%6%36%5%46%5%7%8%30%
2694
August1st to 15thDay
16%6%25%6%345%7%7%33%
2340
16th to endDay
13%5%25%6%345%5%8%38%
2459
September1st to 15thDay
17%6%25%434446%39%
2146
16th to endDay
17%423433346%46%
1960
October1st to 15thDay
17%7%25%5%34445%40%
1800
16th to endDay
22%6%244245%5%6%34%
1880
November1st to 15thDay
22%10%25%4335%46%30%
1531
16th to endDay
16%11%46%435%5%46%30%
1560
December1st to 15thDay
24%10%36%434325%29%
1521
16th to endDay
21%12%47%433446%28%
1456
January1st to 15thNight
16%9%47%6%2445%6%32%
2852
16th to endNight
15%8%36%5%34345%38%
2604
February1st to 15thNight
16%12%46%43445%5%33%
2285
16th to endNight
17%14%47%6%34435%27%
2042
March1st to 15thNight
19%10%47%5%35%45%5%30%
1991
16th to endNight
19%11%5%6%42333435%
2112
April1st to 15thNight
23%10%35%5%3445%5%28%
1769
16th to endNight
24%10%24322345%35%
1620
May1st to 15thNight
25%8%35%32325%6%31%
1511
16th to endNight
19%7%36%5%35%5%5%6%29%
1484
June1st to 15thNight
24%7%36%5%2345%5%30%
1260
16th to endNight
24%6%25%4345%6%8%27%
1260
July1st to 15thNight
13%5%25%5%35%5%6%10%36%
1260
16th to endNight
17%6%37%5%35%5%5%8%30%
1457
August1st to 15thNight
18%6%15%6%35%45%8%34%
1620
16th to endNight
14%5%245%3446%7%39%
1743
September1st to 15thNight
18%6%25%423348%41%
1812
16th to endNight
15%423313345%51%
1999
October1st to 15thNight
17%6%2442345%6%43%
2160
16th to endNight
23%7%25%5%33335%34%
2343
November1st to 15thNight
23%8%35%434346%32%
2657
16th to endNight
21%8%45%5%34346%31%
2730
December1st to 15thNight
23%10%37%423336%30%
2768
16th to endNight
23%11%46%424335%28%
3120

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
51%414%17%11%
1331
16th to endDay
48%29%21%17%
1616
February1st to 15thDay
51%312%21%8%1
1578
16th to endDay
58%48%18%8%1
1431
March1st to 15thDay
54%49%20%10%1
1956
16th to endDay
52%48%20%11%2
2112
April1st to 15thDay
52%5%8%18%13%2
2178
16th to endDay
51%39%17%13%2
2340
May1st to 15thDay
54%49%21%9%
2440
16th to endDay
53%6%12%21%5%1
2642
June1st to 15thDay
56%5%12%17%7%
2700
16th to endDay
52%7%13%18%7%
2700
July1st to 15thDay
41%8%17%23%9%
2541
16th to endDay
46%7%18%20%7%
2527
August1st to 15thDay
44%7%14%25%7%
2327
16th to endDay
40%6%17%27%8%
2459
September1st to 15thDay
44%5%14%24%11%
2146
16th to endDay
38%411%28%15%1
1960
October1st to 15thDay
44%312%27%9%
1800
16th to endDay
48%5%12%21%11%
1880
November1st to 15thDay
54%413%16%10%
1531
16th to endDay
55%415%18%6%
1560
December1st to 15thDay
59%414%16%5%
1521
16th to endDay
58%310%16%9%
1456
January1st to 15thNight
52%413%19%9%
2852
16th to endNight
48%311%24%11%
2604
February1st to 15thNight
52%312%19%11%
2286
16th to endNight
59%39%16%9%1
2042
March1st to 15thNight
55%38%20%10%1
2003
16th to endNight
54%27%20%12%2
2112
April1st to 15thNight
56%38%16%11%2
1769
16th to endNight
51%29%18%16%1
1620
May1st to 15thNight
53%311%20%9%1
1511
16th to endNight
52%5%14%18%8%
1486
June1st to 15thNight
54%412%18%8%1
1260
16th to endNight
53%5%14%18%7%
1260
July1st to 15thNight
40%6%18%27%8%
1190
16th to endNight
49%6%18%16%8%
1363
August1st to 15thNight
47%6%16%22%7%
1608
16th to endNight
42%5%18%25%7%
1743
September1st to 15thNight
42%412%27%13%
1812
16th to endNight
35%313%30%14%
1999
October1st to 15thNight
41%313%29%10%
2160
16th to endNight
52%49%23%9%
2343
November1st to 15thNight
54%313%19%8%
2657
16th to endNight
54%5%13%20%6%
2730
December1st to 15thNight
56%313%20%5%
2768
16th to endNight
59%210%17%8%
3120

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
14%19%36%24%4
82
16th to endDay
15%9%35%32%41
192
February1st to 15thDay
18%5%38%27%8%2
236
16th to endDay
23%9%31%24%9%1
214
March1st to 15thDay
20%15%33%21%7%2
270
16th to endDay
23%10%29%26%8%1
288
April1st to 15thDay
26%5%35%21%10%1
270
16th to endDay
25%5%32%23%9%3
270
May1st to 15thDay
32%5%22%23%12%3
396
16th to endDay
26%8%24%26%13%1
519
June1st to 15thDay
32%5%23%25%11%1
495
16th to endDay
25%324%28%15%2
495
July1st to 15thDay
15%329%26%21%3
475
16th to endDay
19%220%33%20%4
484
August1st to 15thDay
17%113%35%25%5%
313
16th to endDay
15%323%30%20%6%
332
September1st to 15thDay
20%6%26%29%15%1
315
16th to endDay
19%5%26%29%13%4
309
October1st to 15thDay
20%9%29%21%14%3
270
16th to endDay
27%12%34%17%7%1
288
November1st to 15thDay
27%9%31%19%11%1
280
16th to endDay
23%12%36%21%4
285
December1st to 15thDay
32%10%34%18%4
246
16th to endDay
18%27%38%15%
96
January1st to 15thNight
21%14%36%22%5%
806
16th to endNight
20%9%36%26%6%
775
February1st to 15thNight
22%7%38%23%7%
704
16th to endNight
25%8%31%25%7%1
631
March1st to 15thNight
23%8%34%26%5%
720
16th to endNight
25%10%29%23%8%1
768
April1st to 15thNight
29%5%27%29%8%
558
16th to endNight
28%5%27%27%9%1
540
May1st to 15thNight
30%422%26%13%2
540
16th to endNight
23%5%27%29%13%
551
June1st to 15thNight
28%320%36%10%
360
16th to endNight
26%322%32%13%1
360
July1st to 15thNight
14%425%38%16%
340
16th to endNight
19%221%38%15%1
481
August1st to 15thNight
19%317%37%21%1
539
16th to endNight
17%225%32%19%1
573
September1st to 15thNight
21%6%29%30%11%
552
16th to endNight
19%6%31%29%13%
717
October1st to 15thNight
23%6%33%26%9%1
720
16th to endNight
28%12%33%19%6%
768
November1st to 15thNight
27%9%32%21%7%1
804
16th to endNight
24%13%31%22%6%
825
December1st to 15thNight
30%14%38%12%3
825
16th to endNight
31%15%32%16%41
880
Page generated at 2018-01-12 23:01:28. Version ac04

Copyright 2018 A. Danko


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