Reserve Faunique La Verendrye
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Reserve Faunique La Verendrye clear sky chart from 2005-11-05 to 2018-04-23.

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
25%
15404
12%
49421
7%
15372
31%
15372
14%
36536

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
15%
780
7%
2716
4%
776
19%
776
6%
2228
January16th to endNight
19%
832
10%
2877
5%
832
26%
832
9%
2250
February1st to 15thNight
18%
764
11%
2482
5%
761
26%
761
10%
1957
February16th to endNight
17%
683
10%
2149
4%
683
24%
683
10%
1683
March1st to 15thNight
17%
780
11%
2258
6%
780
24%
780
11%
1790
March16th to endNight
25%
832
21%
2217
8%
832
35%
832
21%
1538
April1st to 15thNight
23%
778
16%
1946
5%
778
28%
778
18%
1452
April16th to endNight
27%
607
18%
1721
8%
607
34%
607
20%
1200
May1st to 15thNight
31%
360
16%
1440
15%
360
40%
360
15%
976
May16th to endNight
28%
375
12%
1497
11%
374
40%
374
15%
999
June1st to 15thNight
27%
360
7%
1440
6%
360
34%
360
13%
992
June16th to endNight
35%
360
8%
1317
7%
360
40%
360
20%
851
July1st to 15thNight
39%
340
10%
1333
12%
340
44%
340
22%
789
July16th to endNight
47%
376
12%
1418
14%
354
52%
354
23%
852
August1st to 15thNight
44%
428
13%
1499
12%
426
48%
426
23%
947
August16th to endNight
43%
672
19%
1818
8%
672
49%
672
32%
1159
September1st to 15thNight
37%
720
13%
1800
5%
720
40%
720
28%
1247
September16th to endNight
39%
717
18%
1968
11%
717
43%
717
27%
1324
October1st to 15thNight
25%
720
14%
2160
8%
720
34%
720
16%
1574
October16th to endNight
19%
768
10%
2401
6%
768
26%
768
12%
1896
November1st to 15thNight
20%
760
14%
2592
8%
760
29%
760
11%
1942
November16th to endNight
16%
780
9%
2730
6%
780
20%
780
7%
2213
December1st to 15thNight
15%
780
8%
2730
2%
780
22%
780
7%
2244
December16th to endNight
13%
832
10%
2912
5%
832
20%
832
6%
2433

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%11%47%6%34446%26%
50089
Night
18%12%47%6%34445%27%
49590
TransparencyDay
59%39%18%8%
49776
Night
58%29%19%8%
49421
SeeingDay
27%11%31%18%7%2
6168
Night
26%10%29%23%8%1
15404

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
22%17%7%12%7%24325%14%
1552
16th to endDay
15%16%6%11%7%45%5%5%5%17%
1697
February1st to 15thDay
8%16%8%13%10%46%447%15%
1710
16th to endDay
18%18%6%9%5%34335%21%
1610
March1st to 15thDay
17%17%5%8%6%25%43424%
2021
16th to endDay
13%9%36%5%35%5%46%35%
2358
April1st to 15thDay
22%15%48%42223428%
2332
16th to endDay
21%9%46%5%23335%33%
2365
May1st to 15thDay
22%11%36%424446%28%
2511
16th to endDay
23%7%35%6%34345%31%
2618
June1st to 15thDay
21%9%46%7%45%45%6%24%
2520
16th to endDay
17%6%37%6%35%5%7%8%27%
2634
July1st to 15thDay
17%6%36%6%36%5%5%9%29%
2541
16th to endDay
16%7%36%7%35%5%6%7%30%
2654
August1st to 15thDay
18%8%37%7%5%6%5%46%25%
2448
16th to endDay
16%7%26%6%36%5%6%6%32%
2372
September1st to 15thDay
21%6%26%424446%35%
2160
16th to endDay
21%8%25%423337%37%
1989
October1st to 15thDay
24%11%46%5%24346%27%
1800
16th to endDay
29%17%48%6%2333315%
1821
November1st to 15thDay
19%15%5%8%5%3434425%
1592
16th to endDay
25%16%7%10%6%3433415%
1560
December1st to 15thDay
21%21%7%10%7%35%43411%
1560
16th to endDay
20%19%8%9%7%2444314%
1664
January1st to 15thNight
19%17%8%11%7%35%345%14%
2716
16th to endNight
15%15%6%10%8%445%6%6%17%
2877
February1st to 15thNight
10%12%7%10%13%5%5%445%19%
2480
16th to endNight
14%17%6%10%7%4434421%
2149
March1st to 15thNight
18%15%6%8%7%25%44421%
2245
16th to endNight
15%10%36%425%44438%
2217
April1st to 15thNight
21%11%47%5%23235%32%
1946
16th to endNight
19%8%35%5%24345%36%
1721
May1st to 15thNight
21%8%37%423445%33%
1440
16th to endNight
20%7%35%5%345%47%32%
1495
June1st to 15thNight
17%9%38%6%345%5%6%28%
1440
16th to endNight
16%6%35%5%345%5%7%36%
1317
July1st to 15thNight
15%5%15%435%46%8%39%
1413
16th to endNight
11%5%35%5%345%6%9%39%
1514
August1st to 15thNight
12%8%26%6%2446%8%37%
1509
16th to endNight
10%5%26%425%6%6%7%42%
1818
September1st to 15thNight
17%8%245%24446%39%
1800
16th to endNight
17%6%35%423446%41%
1968
October1st to 15thNight
22%10%36%424335%31%
2160
16th to endNight
26%15%47%423345%21%
2401
November1st to 15thNight
21%13%47%6%2444425%
2592
16th to endNight
26%15%5%9%6%2323418%
2730
December1st to 15thNight
21%19%6%9%6%24435%14%
2730
16th to endNight
19%18%7%11%7%3443414%
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
73%26%11%4
1553
16th to endDay
67%35%14%8%
1697
February1st to 15thDay
69%27%13%6%
1712
16th to endDay
66%15%15%9%
1610
March1st to 15thDay
63%37%15%8%1
2031
16th to endDay
48%38%19%14%4
2358
April1st to 15thDay
60%17%16%11%2
2332
16th to endDay
54%26%19%15%2
2365
May1st to 15thDay
56%27%20%12%1
2511
16th to endDay
54%28%20%12%1
2622
June1st to 15thDay
59%38%18%9%
2520
16th to endDay
52%411%22%8%
2634
July1st to 15thDay
49%312%24%9%
2392
16th to endDay
53%312%21%8%
2487
August1st to 15thDay
58%312%19%5%
2434
16th to endDay
50%314%24%7%
2372
September1st to 15thDay
50%313%20%11%
2160
16th to endDay
48%314%26%6%
1989
October1st to 15thDay
58%212%18%8%
1800
16th to endDay
74%27%11%3
1821
November1st to 15thDay
63%311%14%7%
1592
16th to endDay
74%26%11%5%
1560
December1st to 15thDay
77%25%12%2
1560
16th to endDay
73%25%11%6%
1664
January1st to 15thNight
73%27%12%3
2716
16th to endNight
66%36%15%8%
2877
February1st to 15thNight
66%27%16%6%
2482
16th to endNight
66%26%14%9%
2149
March1st to 15thNight
65%36%15%8%
2258
16th to endNight
48%37%21%17%2
2217
April1st to 15thNight
56%15%20%13%2
1946
16th to endNight
50%27%20%15%2
1721
May1st to 15thNight
54%26%19%14%2
1440
16th to endNight
51%39%22%11%1
1497
June1st to 15thNight
55%310%20%9%
1440
16th to endNight
46%412%25%10%
1317
July1st to 15thNight
40%415%27%11%
1333
16th to endNight
41%318%27%8%
1418
August1st to 15thNight
43%418%27%5%
1499
16th to endNight
37%5%18%31%7%
1818
September1st to 15thNight
46%217%24%9%
1800
16th to endNight
44%215%29%6%
1968
October1st to 15thNight
55%311%19%10%
2160
16th to endNight
65%210%17%3
2401
November1st to 15thNight
61%211%18%6%
2592
16th to endNight
71%28%13%4
2730
December1st to 15thNight
72%27%13%3
2730
16th to endNight
74%25%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
27%17%41%10%21
90
16th to endDay
30%16%34%11%6%
104
February1st to 15thDay
23%19%47%8%1
135
16th to endDay
38%19%29%9%1
191
March1st to 15thDay
35%13%30%16%4
330
16th to endDay
22%15%36%17%6%1
352
April1st to 15thDay
33%17%25%16%6%
330
16th to endDay
27%15%31%14%8%2
289
May1st to 15thDay
35%10%29%14%7%2
288
16th to endDay
29%12%30%16%8%2
331
June1st to 15thDay
31%9%34%16%6%
315
16th to endDay
18%10%34%24%9%1
429
July1st to 15thDay
18%8%35%27%7%2
326
16th to endDay
21%5%28%28%12%3
326
August1st to 15thDay
22%5%28%28%9%6%
313
16th to endDay
19%6%31%24%10%7%
332
September1st to 15thDay
25%5%31%18%13%5%
315
16th to endDay
24%7%23%24%15%4
314
October1st to 15thDay
25%16%30%17%8%
315
16th to endDay
38%12%26%17%4
311
November1st to 15thDay
27%11%36%17%5%1
156
16th to endDay
36%25%26%8%11
90
December1st to 15thDay
32%11%44%8%21
90
16th to endDay
31%16%40%10%1
96
January1st to 15thNight
32%12%31%21%3
780
16th to endNight
24%11%32%23%6%
832
February1st to 15thNight
20%15%35%22%6%
764
16th to endNight
25%15%31%21%4
683
March1st to 15thNight
29%16%29%20%3
780
16th to endNight
22%13%32%21%9%
832
April1st to 15thNight
29%13%27%23%5%
778
16th to endNight
25%10%31%22%8%
607
May1st to 15thNight
25%8%28%26%10%1
360
16th to endNight
25%9%30%25%8%
375
June1st to 15thNight
27%7%26%27%10%
360
16th to endNight
19%6%31%30%11%
360
July1st to 15thNight
16%5%33%33%11%
340
16th to endNight
14%326%40%14%
376
August1st to 15thNight
17%423%30%21%2
428
16th to endNight
14%331%28%18%2
672
September1st to 15thNight
23%5%28%25%15%2
720
16th to endNight
22%5%27%27%14%1
717
October1st to 15thNight
28%10%30%21%7%1
720
16th to endNight
35%10%29%18%5%1
768
November1st to 15thNight
31%13%28%17%7%1
760
16th to endNight
38%14%23%16%6%1
780
December1st to 15thNight
34%14%28%17%4
780
16th to endNight
32%12%30%18%41
832
Page generated at 2018-04-24 10:03:02. Version ac04

Copyright 2018 A. Danko


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