Haliburton Scout Reserve
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Haliburton Scout Reserve clear sky chart from 2005-11-05 to 2018-03-21.

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
26%
15433
13%
49148
7%
15401
34%
15401
16%
35280

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
12%
780
7%
2716
2%
776
18%
776
6%
2225
January16th to endNight
16%
832
11%
2759
5%
832
24%
832
10%
2177
February1st to 15thNight
13%
763
10%
2482
3%
761
21%
761
9%
1974
February16th to endNight
16%
683
13%
2184
3%
683
27%
683
11%
1657
March1st to 15thNight
15%
780
13%
2176
5%
780
23%
780
13%
1658
March16th to endNight
27%
792
22%
2164
10%
792
37%
792
24%
1449
April1st to 15thNight
19%
718
15%
1796
5%
718
25%
718
18%
1356
April16th to endNight
30%
588
18%
1668
9%
588
36%
588
23%
1149
May1st to 15thNight
35%
414
17%
1494
13%
414
43%
414
19%
958
May16th to endNight
36%
374
14%
1497
10%
374
48%
374
21%
881
June1st to 15thNight
34%
360
9%
1440
7%
360
44%
360
19%
907
June16th to endNight
43%
360
11%
1338
11%
360
49%
360
22%
845
July1st to 15thNight
47%
340
15%
1342
18%
340
54%
340
28%
732
July16th to endNight
49%
391
15%
1432
14%
368
56%
368
26%
811
August1st to 15thNight
54%
539
15%
1609
11%
536
59%
536
32%
982
August16th to endNight
51%
642
19%
1788
9%
642
57%
642
34%
1087
September1st to 15thNight
43%
720
16%
1800
7%
720
47%
720
30%
1203
September16th to endNight
45%
717
22%
1995
15%
717
50%
717
28%
1282
October1st to 15thNight
29%
720
16%
2160
10%
720
38%
720
20%
1503
October16th to endNight
19%
768
11%
2319
5%
768
27%
768
12%
1803
November1st to 15thNight
27%
760
16%
2617
12%
760
34%
760
15%
1838
November16th to endNight
17%
780
11%
2730
6%
780
24%
780
10%
2125
December1st to 15thNight
11%
780
6%
2730
1%
780
16%
780
5%
2283
December16th to endNight
10%
832
9%
2912
3%
832
17%
832
6%
2395

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%11%47%5%34446%29%
49691
Night
17%11%47%5%34446%30%
49320
Cloud CoverDay
18%11%47%6%34446%29%
49701
Night
16%11%47%5%34446%30%
49325
TransparencyDay
56%39%19%9%1
49381
Night
54%310%19%10%
49148
SeeingDay
25%13%29%19%8%3
6006
Night
24%13%29%22%9%1
15435

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
20%17%8%9%7%23235%18%
1552
16th to endDay
14%17%7%12%8%35%425%18%
1814
February1st to 15thDay
12%17%7%14%9%4323418%
1710
16th to endDay
17%17%5%10%5%4433422%
1575
March1st to 15thDay
15%14%5%9%7%24446%25%
2101
16th to endDay
13%10%5%6%5%34335%37%
2187
April1st to 15thDay
22%13%35%5%23335%30%
2152
16th to endDay
21%9%35%313336%37%
2302
May1st to 15thDay
19%9%37%6%24345%31%
2457
16th to endDay
16%6%26%5%35%45%7%35%
2618
June1st to 15thDay
23%7%36%5%3445%7%28%
2520
16th to endDay
17%6%25%6%36%5%6%9%30%
2612
July1st to 15thDay
16%5%25%5%345%6%8%35%
2529
16th to endDay
13%6%47%7%35%5%5%8%33%
2636
August1st to 15thDay
14%7%27%7%36%5%6%6%32%
2340
16th to endDay
14%6%25%5%36%5%6%7%35%
2401
September1st to 15thDay
20%7%25%433446%37%
2160
16th to endDay
17%7%24424346%40%
1965
October1st to 15thDay
26%8%45%433345%29%
1800
16th to endDay
31%12%36%6%2434420%
1905
November1st to 15thDay
19%13%46%5%34446%27%
1571
16th to endDay
22%18%7%9%5%23345%17%
1560
December1st to 15thDay
19%22%8%11%7%2333314%
1560
16th to endDay
18%21%8%11%43332417%
1664
January1st to 15thNight
19%17%7%11%8%33235%16%
2716
16th to endNight
14%16%7%11%7%34445%20%
2759
February1st to 15thNight
12%16%7%12%8%45%5%45%19%
2480
16th to endNight
15%15%5%8%7%35%445%24%
2184
March1st to 15thNight
17%13%47%7%3443429%
2164
16th to endNight
13%9%46%423446%40%
2164
April1st to 15thNight
20%14%45%43323431%
1796
16th to endNight
17%10%25%5%2335%6%37%
1668
May1st to 15thNight
19%7%16%42445%7%35%
1494
16th to endNight
12%6%25%5%245%5%7%41%
1495
June1st to 15thNight
16%8%35%42446%8%34%
1440
16th to endNight
14%7%25%5%25%5%5%6%39%
1338
July1st to 15thNight
10%315%5%25%45%6%48%
1422
16th to endNight
10%4244345%5%8%44%
1529
August1st to 15thNight
9%425%4245%5%8%46%
1620
16th to endNight
9%4245%3445%7%47%
1788
September1st to 15thNight
15%5%3442445%7%42%
1800
16th to endNight
17%6%25%423346%45%
1995
October1st to 15thNight
21%7%35%5%3335%6%34%
2160
16th to endNight
25%13%47%5%23436%23%
2319
November1st to 15thNight
19%10%46%5%34445%31%
2617
16th to endNight
23%15%48%6%24445%22%
2730
December1st to 15thNight
20%22%6%10%5%3434414%
2730
16th to endNight
21%18%8%10%6%3334416%
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
20%17%7%9%7%23235%19%
1552
16th to endDay
14%16%7%12%8%45%33418%
1814
February1st to 15thDay
12%18%7%14%9%4424318%
1710
16th to endDay
17%16%5%10%5%4443422%
1575
March1st to 15thDay
16%13%5%8%8%34345%25%
2112
16th to endDay
13%10%46%5%34335%37%
2186
April1st to 15thDay
22%13%35%5%23335%30%
2152
16th to endDay
21%10%35%413335%37%
2302
May1st to 15thDay
19%9%36%6%3435%6%31%
2457
16th to endDay
16%6%36%5%35%45%7%35%
2618
June1st to 15thDay
23%7%36%5%2445%7%28%
2520
16th to endDay
17%6%346%35%5%6%9%30%
2612
July1st to 15thDay
16%6%245%346%7%7%35%
2529
16th to endDay
13%6%37%7%45%5%5%9%32%
2636
August1st to 15thDay
14%6%36%6%46%5%6%6%32%
2340
16th to endDay
14%6%25%5%35%5%6%8%35%
2401
September1st to 15thDay
19%8%25%434446%37%
2160
16th to endDay
17%7%24425%346%40%
1965
October1st to 15thDay
25%9%35%5%34345%29%
1800
16th to endDay
30%12%36%6%3434420%
1905
November1st to 15thDay
18%13%47%424436%28%
1571
16th to endDay
22%19%6%9%5%33335%17%
1560
December1st to 15thDay
19%21%8%11%6%3333414%
1560
16th to endDay
18%21%8%11%43333417%
1664
January1st to 15thNight
19%17%6%12%7%34335%16%
2716
16th to endNight
14%16%7%11%7%35%445%21%
2759
February1st to 15thNight
12%15%7%11%8%45%5%45%19%
2473
16th to endNight
15%15%5%8%7%3445%5%24%
2184
March1st to 15thNight
17%13%5%7%7%3443429%
2176
16th to endNight
13%8%36%42435%6%40%
2164
April1st to 15thNight
20%14%46%43324432%
1796
16th to endNight
17%10%25%5%2335%6%37%
1668
May1st to 15thNight
19%7%25%42445%8%35%
1494
16th to endNight
12%6%25%435%5%5%8%41%
1495
June1st to 15thNight
16%7%45%42445%9%34%
1440
16th to endNight
13%8%25%5%25%5%5%5%39%
1338
July1st to 15thNight
9%415%5%25%45%7%47%
1422
16th to endNight
10%4245%3446%8%44%
1529
August1st to 15thNight
9%425%5%245%5%8%46%
1620
16th to endNight
9%5%245%3445%7%48%
1788
September1st to 15thNight
15%5%35%42345%7%42%
1800
16th to endNight
16%6%24423345%45%
1995
October1st to 15thNight
20%8%35%5%2335%6%34%
2160
16th to endNight
24%13%47%5%23446%23%
2319
November1st to 15thNight
19%10%46%5%34446%31%
2617
16th to endNight
23%15%47%6%24445%22%
2730
December1st to 15thNight
19%22%7%10%6%3434414%
2730
16th to endNight
21%18%8%10%6%2334416%
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
68%39%10%7%
1553
16th to endDay
69%35%11%8%1
1814
February1st to 15thDay
70%28%12%5%
1712
16th to endDay
65%37%12%11%
1575
March1st to 15thDay
60%311%15%7%1
2112
16th to endDay
49%37%19%16%4
2187
April1st to 15thDay
57%27%18%11%2
2152
16th to endDay
50%27%22%14%2
2302
May1st to 15thDay
53%38%19%13%1
2457
16th to endDay
48%410%21%13%1
2622
June1st to 15thDay
55%310%21%9%
2520
16th to endDay
49%412%20%11%1
2612
July1st to 15thDay
43%411%28%11%1
2380
16th to endDay
48%411%24%9%
2470
August1st to 15thDay
50%414%20%9%
2327
16th to endDay
45%413%27%8%
2401
September1st to 15thDay
47%312%24%11%
2160
16th to endDay
45%310%29%10%
1965
October1st to 15thDay
57%39%18%10%
1800
16th to endDay
67%39%12%5%
1905
November1st to 15thDay
57%412%16%7%
1571
16th to endDay
70%28%11%41
1560
December1st to 15thDay
74%37%9%4
1560
16th to endDay
72%25%12%6%
1664
January1st to 15thNight
72%27%10%5%
2716
16th to endNight
65%36%13%9%
2759
February1st to 15thNight
66%49%12%6%
2482
16th to endNight
60%47%17%9%
2184
March1st to 15thNight
59%310%15%9%1
2176
16th to endNight
44%38%23%17%2
2164
April1st to 15thNight
56%25%20%13%1
1796
16th to endNight
48%38%21%16%2
1668
May1st to 15thNight
47%310%20%16%2
1494
16th to endNight
40%413%24%15%1
1497
June1st to 15thNight
46%314%20%14%
1440
16th to endNight
44%313%26%11%
1338
July1st to 15thNight
34%412%28%19%
1342
16th to endNight
36%414%30%13%
1432
August1st to 15thNight
34%5%17%29%12%
1609
16th to endNight
35%416%32%10%1
1788
September1st to 15thNight
40%5%15%26%11%
1800
16th to endNight
41%311%32%10%
1995
October1st to 15thNight
50%310%22%12%
2160
16th to endNight
62%411%14%6%
2319
November1st to 15thNight
54%313%19%8%1
2617
16th to endNight
65%310%15%4
2730
December1st to 15thNight
74%38%10%3
2730
16th to endNight
72%27%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
24%26%36%10%2
90
16th to endDay
38%19%29%12%1
131
February1st to 15thDay
32%28%32%5%
135
16th to endDay
39%22%28%8%1
156
March1st to 15thDay
27%17%30%19%4
330
16th to endDay
23%17%33%16%7%1
311
April1st to 15thDay
29%18%29%16%5%
270
16th to endDay
28%18%24%14%11%1
270
May1st to 15thDay
34%9%26%17%8%5%
288
16th to endDay
23%16%32%17%8%1
331
June1st to 15thDay
29%12%29%20%6%1
315
16th to endDay
18%12%32%27%7%2
407
July1st to 15thDay
19%5%33%26%11%4
314
16th to endDay
17%7%34%24%11%4
326
August1st to 15thDay
16%428%31%11%7%
313
16th to endDay
20%7%23%27%12%8%
332
September1st to 15thDay
19%7%26%19%17%9%
315
16th to endDay
20%8%23%24%15%7%
314
October1st to 15thDay
29%16%21%21%8%2
315
16th to endDay
38%16%27%12%4
332
November1st to 15thDay
29%11%35%17%31
135
16th to endDay
37%20%30%12%
90
December1st to 15thDay
35%16%28%15%3
90
16th to endDay
27%30%35%43
96
January1st to 15thNight
32%18%28%15%4
780
16th to endNight
23%16%36%17%5%
832
February1st to 15thNight
22%19%35%18%3
764
16th to endNight
24%18%35%16%4
683
March1st to 15thNight
27%17%35%16%3
780
16th to endNight
20%15%32%20%10%1
792
April1st to 15thNight
28%17%30%18%5%
718
16th to endNight
23%13%30%21%10%
588
May1st to 15thNight
21%9%28%26%12%
414
16th to endNight
15%7%36%30%9%
375
June1st to 15thNight
21%8%27%32%9%
360
16th to endNight
16%8%25%37%11%
360
July1st to 15thNight
11%428%35%17%1
340
16th to endNight
10%5%28%36%18%
391
August1st to 15thNight
11%422%36%22%2
539
16th to endNight
11%5%25%32%22%2
642
September1st to 15thNight
18%7%25%27%16%4
720
16th to endNight
22%6%19%30%17%3
717
October1st to 15thNight
23%12%28%22%11%1
720
16th to endNight
35%15%25%17%5%
768
November1st to 15thNight
25%13%27%24%8%
760
16th to endNight
35%12%28%17%4
780
December1st to 15thNight
32%19%31%13%2
780
16th to endNight
31%18%30%15%2
832
Page generated at 2018-03-22 11:34:24. Version ac04

Copyright 2018 A. Danko


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