Saint-Camille-de-Lellis
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Saint-Camille-de-Lellis clear sky chart from 2005-11-05 to 2017-10-31.

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
20%
14841
11%
47352
5%
14810
27%
14810
12%
35359

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
6%
721
8%
2509
2%
717
14%
717
5%
2049
January16th to endNight
11%
768
10%
2688
1%
768
20%
768
7%
2041
February1st to 15thNight
11%
703
7%
2343
2%
701
18%
701
6%
1888
February16th to endNight
9%
631
11%
1893
2%
631
20%
631
9%
1481
March1st to 15thNight
14%
720
14%
2133
6%
720
23%
720
11%
1603
March16th to endNight
21%
768
15%
2061
5%
768
29%
768
14%
1557
April1st to 15thNight
15%
693
15%
1771
4%
693
22%
693
13%
1362
April16th to endNight
22%
540
14%
1620
5%
540
31%
540
14%
1160
May1st to 15thNight
24%
507
11%
1587
7%
507
30%
507
14%
1155
May16th to endNight
22%
375
10%
1428
6%
374
32%
374
9%
1037
June1st to 15thNight
21%
360
6%
1260
4%
360
26%
360
10%
959
June16th to endNight
28%
360
7%
1260
4%
360
34%
360
13%
908
July1st to 15thNight
31%
340
8%
1284
9%
340
36%
340
16%
861
July16th to endNight
32%
376
9%
1418
9%
354
41%
354
16%
947
August1st to 15thNight
40%
455
10%
1526
9%
453
44%
453
17%
1040
August16th to endNight
36%
606
18%
1752
8%
606
43%
606
26%
1113
September1st to 15thNight
30%
720
11%
1875
4%
720
35%
720
24%
1306
September16th to endNight
34%
717
18%
1980
10%
717
41%
717
27%
1290
October1st to 15thNight
23%
720
15%
2066
6%
720
32%
720
17%
1471
October16th to endNight
15%
768
9%
2494
4%
768
22%
768
10%
1934
November1st to 15thNight
20%
700
14%
2277
8%
700
28%
700
11%
1709
November16th to endNight
17%
743
12%
2547
5%
743
25%
743
9%
1941
December1st to 15thNight
8%
750
5%
2700
0%
750
13%
750
4%
2209
December16th to endNight
9%
800
8%
2880
3%
800
17%
800
4%
2338

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%10%47%6%35%45%6%26%
48395
Night
16%9%47%6%35%45%6%30%
47520
TransparencyDay
59%6%10%16%7%
48081
Night
56%6%11%17%7%
47352
SeeingDay
25%22%27%15%6%1
6396
Night
20%27%27%17%6%
14842

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
13%13%7%11%10%45%44420%
1426
16th to endDay
9%13%7%9%8%46%5%5%6%22%
1536
February1st to 15thDay
9%15%7%10%10%5%6%45%5%18%
1517
16th to endDay
13%15%6%10%9%5%435%421%
1580
March1st to 15thDay
15%14%5%9%6%3443426%
1817
16th to endDay
15%11%5%9%6%45%445%29%
2160
April1st to 15thDay
20%13%46%5%2424430%
2176
16th to endDay
21%11%35%424445%31%
2340
May1st to 15thDay
22%9%46%5%34336%28%
2373
16th to endDay
22%8%36%6%35%45%7%24%
2687
June1st to 15thDay
25%7%36%6%35%5%6%7%22%
2700
16th to endDay
22%9%47%6%35%5%6%6%22%
2700
July1st to 15thDay
17%6%37%7%46%5%7%8%27%
2596
16th to endDay
18%7%37%7%46%5%7%7%23%
2654
August1st to 15thDay
19%7%38%6%46%5%6%7%24%
2410
16th to endDay
13%7%26%6%35%45%8%34%
2447
September1st to 15thDay
19%8%36%433346%36%
2085
16th to endDay
17%7%24433447%40%
1980
October1st to 15thDay
21%11%36%5%24336%30%
1890
16th to endDay
22%14%48%6%33446%21%
1728
November1st to 15thDay
18%13%46%6%245%45%27%
1581
16th to endDay
17%15%47%6%35%35%5%25%
1408
December1st to 15thDay
19%18%6%9%6%35%245%17%
1260
16th to endDay
20%14%7%10%6%25%44419%
1344
January1st to 15thNight
12%13%6%11%8%45%5%5%5%20%
2509
16th to endNight
9%10%5%9%8%5%6%6%6%7%23%
2688
February1st to 15thNight
7%11%411%11%5%7%6%5%6%21%
2342
16th to endNight
13%12%5%9%8%35%45%5%26%
1893
March1st to 15thNight
16%10%47%5%35%446%31%
2120
16th to endNight
12%10%47%6%45%45%5%33%
2061
April1st to 15thNight
17%11%47%6%335%5%5%30%
1771
16th to endNight
20%8%35%5%34445%34%
1620
May1st to 15thNight
21%8%26%5%25%446%31%
1587
16th to endNight
22%5%36%6%345%5%5%31%
1426
June1st to 15thNight
23%9%26%6%35%45%6%26%
1260
16th to endNight
17%6%26%5%345%5%7%33%
1260
July1st to 15thNight
16%6%245%36%45%7%36%
1362
16th to endNight
14%5%25%5%35%6%6%7%36%
1514
August1st to 15thNight
14%6%25%5%345%6%8%37%
1536
16th to endNight
13%4244345%6%9%43%
1752
September1st to 15thNight
17%5%25%43445%6%40%
1875
16th to endNight
14%5%2342345%6%45%
1980
October1st to 15thNight
17%8%3443445%6%36%
2066
16th to endNight
22%12%36%5%245%5%427%
2494
November1st to 15thNight
16%9%46%5%35%5%5%7%29%
2277
16th to endNight
17%11%48%7%35%35%5%28%
2547
December1st to 15thNight
18%13%5%11%7%45%44419%
2700
16th to endNight
19%14%5%9%8%3434421%
2880

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
68%47%11%6%
1427
16th to endDay
63%5%8%16%7%
1536
February1st to 15thDay
70%48%11%5%
1520
16th to endDay
65%5%7%12%7%1
1580
March1st to 15thDay
62%49%12%10%1
1827
16th to endDay
58%5%8%16%10%1
2160
April1st to 15thDay
58%38%17%8%3
2176
16th to endDay
54%5%8%17%11%2
2340
May1st to 15thDay
57%5%9%16%8%
2373
16th to endDay
60%6%11%14%6%
2691
June1st to 15thDay
61%6%10%15%5%
2700
16th to endDay
61%7%10%14%6%
2700
July1st to 15thDay
53%8%14%16%5%
2445
16th to endDay
59%7%12%15%4
2487
August1st to 15thDay
58%9%15%12%3
2396
16th to endDay
47%7%15%22%6%
2447
September1st to 15thDay
49%6%12%19%10%
2085
16th to endDay
43%6%12%26%11%
1980
October1st to 15thDay
54%5%12%21%6%
1890
16th to endDay
64%5%10%15%3
1728
November1st to 15thDay
59%6%11%14%7%
1581
16th to endDay
62%5%9%16%5%
1408
December1st to 15thDay
71%5%9%11%2
1260
16th to endDay
71%47%8%7%
1344
January1st to 15thNight
68%5%8%11%4
2509
16th to endNight
59%7%11%15%5%
2688
February1st to 15thNight
64%6%9%12%5%1
2343
16th to endNight
62%49%13%9%1
1893
March1st to 15thNight
56%6%8%17%9%2
2133
16th to endNight
54%6%9%17%11%1
2061
April1st to 15thNight
57%45%18%11%2
1771
16th to endNight
50%6%10%16%12%3
1620
May1st to 15thNight
54%5%10%18%10%
1587
16th to endNight
55%8%10%16%9%
1428
June1st to 15thNight
59%6%11%15%6%
1260
16th to endNight
49%10%13%18%7%
1260
July1st to 15thNight
45%8%17%19%7%
1284
16th to endNight
46%7%16%19%8%
1418
August1st to 15thNight
45%9%18%23%3
1526
16th to endNight
35%8%20%28%6%
1752
September1st to 15thNight
44%6%15%24%9%
1875
16th to endNight
39%6%16%25%11%
1980
October1st to 15thNight
49%6%12%23%8%
2066
16th to endNight
60%6%11%15%5%
2494
November1st to 15thNight
54%8%13%14%6%1
2277
16th to endNight
60%5%11%16%5%
2547
December1st to 15thNight
69%5%10%11%2
2700
16th to endNight
69%49%10%5%
2880

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
21%31%43%3
60
16th to endDay
21%28%35%10%3
64
February1st to 15thDay
25%24%33%12%3
162
16th to endDay
23%25%36%10%3
239
March1st to 15thDay
25%33%25%12%3
270
16th to endDay
23%27%21%17%7%2
288
April1st to 15thDay
28%28%26%11%4
270
16th to endDay
27%25%25%13%42
270
May1st to 15thDay
32%21%28%11%32
288
16th to endDay
24%28%30%12%3
400
June1st to 15thDay
28%23%25%17%6%
495
16th to endDay
26%20%28%18%6%
495
July1st to 15thDay
21%18%31%17%9%1
379
16th to endDay
19%19%30%23%6%1
326
August1st to 15thDay
24%12%28%24%6%2
313
16th to endDay
20%17%27%18%11%3
332
September1st to 15thDay
22%15%27%22%9%2
315
16th to endDay
18%14%28%18%13%5%
314
October1st to 15thDay
25%22%22%16%9%3
298
16th to endDay
35%24%22%11%5%
288
November1st to 15thDay
24%27%26%15%5%1
235
16th to endDay
29%28%16%15%7%2
171
December1st to 15thDay
40%21%28%6%3
60
16th to endDay
42%29%23%4
64
January1st to 15thNight
19%40%30%8%1
721
16th to endNight
16%34%33%13%2
768
February1st to 15thNight
14%37%30%14%2
704
16th to endNight
22%31%31%10%3
631
March1st to 15thNight
23%30%29%14%2
720
16th to endNight
19%30%26%17%5%
768
April1st to 15thNight
22%31%25%14%5%
693
16th to endNight
23%25%25%19%5%
540
May1st to 15thNight
23%25%24%18%8%
507
16th to endNight
19%26%25%21%5%
375
June1st to 15thNight
24%21%26%20%6%
360
16th to endNight
16%23%27%23%8%1
360
July1st to 15thNight
17%18%28%24%10%
340
16th to endNight
17%19%25%30%7%
376
August1st to 15thNight
16%12%23%30%15%1
455
16th to endNight
13%13%31%27%12%1
606
September1st to 15thNight
18%15%31%23%9%1
720
16th to endNight
17%17%27%23%12%1
717
October1st to 15thNight
22%20%28%19%8%
720
16th to endNight
29%23%27%13%5%
768
November1st to 15thNight
21%29%24%18%5%
700
16th to endNight
22%31%24%13%6%1
743
December1st to 15thNight
25%36%24%10%2
750
16th to endNight
26%35%22%11%3
800
Page generated at 2017-11-01 17:23:38. Version ac04

Copyright 2017 A. Danko


Saint-Camille-de-Lellis Clear Sky Chart |Charts Home