Camping Portage (Laverendrie)
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Camping Portage (Laverendrie) clear sky chart from 2005-11-06 to 2024-02-20.

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
24%
22517
10%
80255
7%
22427
29%
22427
11%
61820

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
10%
755
5%
4415
2%
737
16%
737
3%
3655
January11th to 20thNight
16%
756
6%
4414
4%
740
21%
740
3%
3579
January21st to endNight
23%
832
6%
4780
8%
814
28%
814
5%
4040
February1st to 10thNight
18%
760
9%
2470
5%
760
25%
760
9%
1982
February11th to 20thNight
14%
742
9%
2399
3%
739
22%
739
9%
1941
February21st to endNight
17%
592
10%
1842
5%
592
24%
592
10%
1460
March1st to 10thNight
20%
720
11%
2120
6%
720
25%
720
12%
1679
March11th to 20thNight
17%
720
13%
1980
5%
720
25%
720
12%
1547
March21st to endNight
23%
792
18%
2093
7%
792
32%
792
19%
1524
April1st to 10thNight
20%
720
13%
1800
4%
720
25%
720
16%
1399
April11th to 20thNight
27%
711
17%
1775
7%
711
32%
711
20%
1316
April21st to endNight
24%
505
15%
1585
7%
505
33%
505
15%
1152
May1st to 10thNight
29%
360
15%
1440
13%
360
37%
360
15%
982
May11th to 20thNight
31%
354
17%
1416
17%
354
40%
354
14%
959
May21st to endNight
27%
389
10%
1551
9%
388
37%
388
17%
1007
June1st to 10thNight
24%
360
8%
1440
7%
360
30%
360
14%
990
June11th to 20thNight
36%
360
10%
1327
8%
360
42%
360
18%
866
June21st to endNight
41%
360
10%
1260
8%
360
45%
360
20%
823
July1st to 10thNight
39%
350
10%
1255
10%
350
45%
350
19%
825
July11th to 20thNight
45%
348
11%
1392
15%
348
50%
348
21%
852
July21st to endNight
47%
394
12%
1486
14%
372
51%
372
21%
932
August1st to 10thNight
44%
381
14%
1445
15%
379
48%
379
20%
941
August11th to 20thNight
47%
534
14%
1598
10%
534
51%
534
25%
1085
August21st to endNight
38%
724
16%
1912
7%
724
43%
724
25%
1340
September1st to 10thNight
38%
720
15%
1800
6%
720
41%
720
28%
1238
September11th to 20thNight
35%
720
16%
1800
8%
720
38%
720
25%
1288
September21st to endNight
34%
720
16%
2056
11%
720
38%
720
21%
1454
October1st to 10thNight
26%
720
14%
2160
8%
720
33%
720
15%
1590
October11th to 20thNight
19%
720
9%
2160
6%
720
25%
720
11%
1730
October21st to endNight
17%
792
9%
2511
5%
792
23%
792
9%
2041
November1st to 10thNight
18%
740
12%
2510
7%
740
27%
740
11%
1934
November11th to 20thNight
15%
760
9%
2660
6%
760
20%
760
7%
2182
November21st to endNight
12%
760
4%
2660
2%
760
14%
760
4%
2325
December1st to 10thNight
12%
760
5%
2660
2%
760
15%
760
4%
2339
December11th to 20thNight
14%
760
6%
3252
4%
759
17%
759
5%
2715
December21st to endNight
12%
826
5%
4831
4%
817
16%
817
2%
4108

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
18%13%5%9%7%45%45%6%25%
78617
Night
17%14%6%9%7%45%445%24%
80558
TransparencyDay
60%5%10%16%8%1
78320
Night
62%5%10%15%7%1
80391
SeeingDay
25%16%31%19%7%2
13698
Night
26%13%30%22%8%1
22540

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
15%21%8%14%9%46%44411%
2517
11th to 20thDay
13%13%8%18%11%5%5%45%415%
2520
21st to endDay
12%19%9%14%8%5%5%445%14%
2868
February1st to 10thDay
8%19%7%12%13%6%6%445%15%
1710
11th to 20thDay
11%17%9%13%10%45%44418%
1654
21st to endDay
16%19%6%9%8%445%46%20%
1413
March1st to 10thDay
15%16%6%11%8%46%43423%
1833
11th to 20thDay
13%15%5%10%7%45%45%6%27%
1980
21st to endDay
17%12%5%7%5%35%45%5%33%
2263
April1st to 10thDay
23%15%5%8%5%34335%27%
2160
11th to 20thDay
22%11%47%5%33346%32%
2137
21st to endDay
20%12%47%6%33445%32%
2389
May1st to 10thDay
19%11%47%5%45%446%31%
2520
11th to 20thDay
23%10%37%6%34445%32%
2478
21st to endDay
19%7%46%5%345%5%7%34%
2725
June1st to 10thDay
22%10%36%6%46%5%5%7%27%
2520
11th to 20thDay
16%6%36%5%36%6%6%9%34%
2628
21st to endDay
19%8%36%7%45%6%7%8%27%
2700
July1st to 10thDay
16%6%36%6%45%5%6%8%34%
2664
11th to 20thDay
16%7%36%6%46%6%7%8%30%
2520
21st to endDay
15%8%36%6%46%6%6%8%31%
2744
August1st to 10thDay
17%8%48%9%46%5%6%6%28%
2481
11th to 20thDay
17%6%36%6%45%5%6%7%33%
2303
21st to endDay
19%8%36%6%36%6%5%7%31%
2426
September1st to 10thDay
18%8%36%6%35%45%6%36%
2160
11th to 20thDay
20%8%35%445%446%36%
2160
21st to endDay
22%11%35%5%2445%7%32%
1899
October1st to 10thDay
22%13%47%5%33446%29%
1800
11th to 20thDay
31%17%5%8%5%23345%18%
1800
21st to endDay
29%18%5%7%5%24445%17%
1844
November1st to 10thDay
17%21%7%8%424345%24%
1563
11th to 20thDay
19%16%9%14%8%4433416%
1520
21st to endDay
23%20%9%13%9%443239%
1520
December1st to 10thDay
20%21%9%11%10%4433310%
1520
11th to 20thDay
19%16%7%14%11%46%5%3312%
1906
21st to endDay
19%20%10%12%10%3333413%
2772
January1st to 10thNight
15%19%9%15%10%45%43413%
4429
11th to 20thNight
12%15%6%14%13%5%6%6%5%5%13%
4440
21st to endNight
9%19%11%13%8%6%7%5%5%412%
4787
February1st to 10thNight
11%14%6%10%11%6%7%5%5%5%19%
2470
11th to 20thNight
12%17%7%11%11%45%5%46%18%
2397
21st to endNight
12%17%7%11%9%45%5%5%5%20%
1842
March1st to 10thNight
14%17%6%8%7%5%6%5%45%22%
2110
11th to 20thNight
18%14%5%10%7%35%445%25%
1979
21st to endNight
16%12%5%8%5%335%35%35%
2093
April1st to 10thNight
20%13%7%9%5%23335%28%
1800
11th to 20thNight
17%11%47%7%34445%34%
1775
21st to endNight
22%12%36%5%34446%30%
1585
May1st to 10thNight
18%10%46%6%35%446%34%
1440
11th to 20thNight
22%9%46%6%33336%35%
1415
21st to endNight
18%8%36%5%35%5%5%8%36%
1550
June1st to 10thNight
18%10%36%6%35%5%6%7%31%
1440
11th to 20thNight
17%8%36%435%5%5%7%37%
1327
21st to endNight
17%6%36%435%5%6%8%35%
1260
July1st to 10thNight
16%6%37%6%445%48%36%
1291
11th to 20thNight
12%6%35%7%35%6%7%9%38%
1440
21st to endNight
12%7%27%5%35%6%6%9%38%
1574
August1st to 10thNight
15%7%26%5%45%6%7%8%36%
1455
11th to 20thNight
15%8%36%5%345%5%6%41%
1598
21st to endNight
17%8%26%5%3445%7%38%
1912
September1st to 10thNight
18%9%25%5%2445%7%40%
1800
11th to 20thNight
21%8%26%434445%39%
1800
21st to endNight
22%9%345%23447%36%
2056
October1st to 10thNight
22%11%5%5%4345%6%5%30%
2160
11th to 20thNight
26%16%48%5%3343423%
2160
21st to endNight
27%19%5%7%6%33345%19%
2511
November1st to 10thNight
19%17%6%9%6%34345%25%
2510
11th to 20thNight
20%17%7%12%7%35%445%17%
2660
21st to endNight
24%20%7%13%9%4333312%
2660
December1st to 10thNight
20%20%6%14%10%45%43411%
2660
11th to 20thNight
21%18%7%11%8%46%44315%
3288
21st to endNight
20%20%7%13%10%3433313%
4884

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
78%39%7%2
2518
11th to 20thDay
73%36%13%5%
2520
21st to endDay
73%46%11%6%1
2868
February1st to 10thDay
71%45%12%7%1
1710
11th to 20thDay
70%37%11%9%1
1663
21st to endDay
66%37%16%8%
1413
March1st to 10thDay
65%46%15%9%1
1836
11th to 20thDay
60%39%15%11%2
1980
21st to endDay
54%47%19%13%3
2263
April1st to 10thDay
61%39%14%11%2
2160
11th to 20thDay
55%48%21%11%2
2137
21st to endDay
56%48%15%15%2
2389
May1st to 10thDay
55%5%8%20%10%3
2520
11th to 20thDay
54%5%7%17%15%1
2482
21st to endDay
50%5%11%18%14%2
2725
June1st to 10thDay
56%6%9%19%9%1
2520
11th to 20thDay
45%7%12%23%12%2
2628
21st to endDay
53%8%12%18%9%
2700
July1st to 10thDay
45%7%13%26%9%
2592
11th to 20thDay
48%7%14%22%9%
2445
21st to endDay
50%8%13%23%6%
2591
August1st to 10thDay
55%7%13%21%5%
2467
11th to 20thDay
49%6%17%20%8%
2303
21st to endDay
51%7%11%21%9%
2426
September1st to 10thDay
48%5%12%22%12%1
2160
11th to 20thDay
48%6%16%21%8%1
2160
21st to endDay
52%5%14%20%7%
1899
October1st to 10thDay
57%5%11%18%8%1
1800
11th to 20thDay
71%410%12%21
1800
21st to endDay
71%5%9%11%5%1
1844
November1st to 10thDay
63%313%15%6%
1563
11th to 20thDay
74%38%10%5%
1520
21st to endDay
81%47%43
1520
December1st to 10thDay
80%37%8%2
1520
11th to 20thDay
77%449%5%1
1906
21st to endDay
77%26%12%2
2772
January1st to 10thNight
77%312%7%2
4429
11th to 20thNight
72%49%11%31
4440
21st to endNight
75%5%6%9%6%
4787
February1st to 10thNight
66%5%7%14%7%1
2470
11th to 20thNight
68%47%13%7%1
2399
21st to endNight
64%5%8%14%8%1
1842
March1st to 10thNight
65%47%13%10%2
2120
11th to 20thNight
62%49%16%8%1
1980
21st to endNight
53%48%19%13%3
2093
April1st to 10thNight
60%38%15%12%2
1800
11th to 20thNight
51%5%7%22%13%2
1775
21st to endNight
56%47%16%15%2
1585
May1st to 10thNight
53%48%18%15%3
1440
11th to 20thNight
54%37%18%15%2
1416
21st to endNight
47%6%11%21%12%3
1551
June1st to 10thNight
51%7%10%22%9%1
1440
11th to 20thNight
47%5%11%20%14%2
1327
21st to endNight
45%6%15%22%11%1
1260
July1st to 10thNight
47%5%14%23%10%1
1255
11th to 20thNight
39%8%15%29%9%
1392
21st to endNight
42%7%18%26%7%
1486
August1st to 10thNight
44%8%18%26%5%
1445
11th to 20thNight
42%8%17%24%8%
1598
21st to endNight
46%6%15%25%7%
1912
September1st to 10thNight
43%5%16%25%10%1
1800
11th to 20thNight
47%6%16%24%8%
1800
21st to endNight
50%5%13%25%7%
2056
October1st to 10thNight
55%6%11%17%10%1
2160
11th to 20thNight
65%5%10%16%31
2160
21st to endNight
69%410%13%41
2511
November1st to 10thNight
63%412%16%5%
2510
11th to 20thNight
70%5%9%10%5%
2660
21st to endNight
78%48%7%2
2660
December1st to 10thNight
78%5%7%7%3
2660
11th to 20thNight
73%47%10%5%
3288
21st to endNight
78%3411%4
4884

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%23%40%12%21
180
11th to 20thDay
24%18%34%18%5%1
180
21st to endDay
19%21%29%23%7%
225
February1st to 10thDay
26%25%38%7%4
270
11th to 20thDay
26%27%34%11%1
267
21st to endDay
30%21%37%9%2
279
March1st to 10thDay
23%21%34%17%4
420
11th to 20thDay
25%21%35%13%41
420
21st to endDay
29%17%35%14%5%1
462
April1st to 10thDay
34%18%26%15%6%
420
11th to 20thDay
30%18%25%17%7%2
412
21st to endDay
25%19%32%17%5%2
420
May1st to 10thDay
25%16%32%18%6%2
423
11th to 20thDay
28%15%30%18%8%2
447
21st to endDay
25%18%31%18%7%1
485
June1st to 10thDay
27%14%32%20%6%1
450
11th to 20thDay
20%15%34%19%11%1
558
21st to endDay
20%15%29%24%10%2
630
July1st to 10thDay
14%9%39%29%8%1
587
11th to 20thDay
19%9%34%22%13%2
444
21st to endDay
18%10%31%27%12%2
488
August1st to 10thDay
19%9%31%27%10%4
446
11th to 20thDay
18%7%29%24%15%6%
439
21st to endDay
21%14%31%19%11%5%
495
September1st to 10thDay
22%11%31%21%12%4
450
11th to 20thDay
23%10%31%21%12%3
450
21st to endDay
26%14%25%21%11%4
450
October1st to 10thDay
28%14%25%23%8%2
450
11th to 20thDay
35%22%26%13%31
450
21st to endDay
37%15%28%17%3
426
November1st to 10thDay
32%19%33%12%41
257
11th to 20thDay
27%22%36%9%41
180
21st to endDay
36%23%28%11%21
180
December1st to 10thDay
31%16%33%15%32
180
11th to 20thDay
30%19%36%12%12
180
21st to endDay
30%18%35%12%42
198
January1st to 10thNight
29%16%33%19%3
760
11th to 20thNight
28%16%29%22%5%
760
21st to endNight
19%12%36%24%9%
836
February1st to 10thNight
18%17%37%22%5%1
760
11th to 20thNight
23%17%37%19%4
742
21st to endNight
22%19%33%21%41
592
March1st to 10thNight
25%19%30%20%5%1
720
11th to 20thNight
26%20%32%16%6%1
720
21st to endNight
23%14%34%22%7%1
792
April1st to 10thNight
28%14%30%23%5%
720
11th to 20thNight
23%17%29%22%8%
711
21st to endNight
28%12%29%23%7%1
505
May1st to 10thNight
24%7%34%25%11%1
360
11th to 20thNight
24%9%28%29%8%1
354
21st to endNight
20%10%38%24%8%
389
June1st to 10thNight
23%7%38%24%7%
360
11th to 20thNight
20%11%28%28%13%1
360
21st to endNight
19%6%28%34%12%1
360
July1st to 10thNight
18%6%32%34%10%1
350
11th to 20thNight
16%5%27%38%13%1
348
21st to endNight
13%6%28%38%14%1
394
August1st to 10thNight
18%7%25%32%18%1
381
11th to 20thNight
16%6%22%31%21%3
534
21st to endNight
20%8%29%25%16%2
724
September1st to 10thNight
21%8%30%28%13%1
720
11th to 20thNight
25%8%28%24%14%2
720
21st to endNight
26%8%27%25%12%2
720
October1st to 10thNight
28%11%31%19%10%1
720
11th to 20thNight
36%14%26%17%6%1
720
21st to endNight
37%14%27%19%3
792
November1st to 10thNight
30%15%31%18%5%1
740
11th to 20thNight
30%19%31%15%6%1
760
21st to endNight
35%17%27%16%41
760
December1st to 10thNight
32%18%29%14%5%1
760
11th to 20thNight
29%18%31%16%5%1
760
21st to endNight
34%18%25%18%5%
836
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