Muncho Lake Provincial Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Muncho Lake Provincial Park clear sky chart from 2005-11-06 to 2024-02-05.

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
37%
23591
9%
81255
6%
23499
40%
23499
13%
59883

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
37%
1016
12%
5283
7%
1006
40%
1006
8%
3888
January11th to 20thNight
32%
962
16%
5076
6%
952
37%
952
8%
3385
January21st to endNight
29%
922
9%
5183
9%
902
37%
902
7%
3937
February1st to 10thNight
37%
822
11%
2766
10%
822
40%
822
13%
2073
February11th to 20thNight
34%
744
12%
2369
9%
742
38%
742
14%
1747
February21st to endNight
44%
592
13%
1924
10%
592
48%
592
15%
1417
March1st to 10thNight
40%
720
15%
2249
11%
720
43%
720
16%
1623
March11th to 20thNight
31%
720
10%
1980
5%
720
34%
720
12%
1585
March21st to endNight
37%
792
10%
2148
6%
792
39%
792
15%
1688
April1st to 10thNight
41%
557
10%
1637
8%
557
44%
557
15%
1220
April11th to 20thNight
46%
525
7%
1593
6%
525
48%
525
17%
1151
April21st to endNight
38%
360
4%
1382
4%
360
39%
360
12%
1019
May1st to 10thNight
44%
360
0%
1260
0%
360
44%
360
14%
936
May11th to 20thNight
51%
354
0%
1127
0%
354
51%
354
21%
748
May21st to endNight
54%
388
0%
1045
0%
388
54%
388
24%
748
June1st to 10thNight
51%
360
0%
900
0%
360
51%
360
20%
676
June11th to 20thNight
47%
360
0%
900
0%
360
47%
360
19%
691
June21st to endNight
47%
360
0%
900
0%
360
47%
360
21%
676
July1st to 10thNight
48%
350
0%
875
0%
350
48%
350
22%
640
July11th to 20thNight
41%
348
0%
870
0%
348
41%
348
17%
670
July21st to endNight
51%
394
0%
1189
0%
372
52%
372
17%
847
August1st to 10thNight
50%
358
0%
1246
0%
356
50%
356
18%
845
August11th to 20thNight
39%
356
4%
1290
2%
356
41%
356
14%
917
August21st to endNight
37%
594
5%
1782
4%
594
39%
594
12%
1402
September1st to 10thNight
37%
578
7%
1658
4%
578
40%
578
16%
1244
September11th to 20thNight
36%
720
9%
1873
5%
720
38%
720
17%
1422
September21st to endNight
28%
720
8%
2007
3%
720
31%
720
13%
1542
October1st to 10thNight
31%
720
9%
2160
5%
720
34%
720
13%
1661
October11th to 20thNight
29%
720
12%
2306
7%
720
37%
720
13%
1689
October21st to endNight
31%
792
6%
2772
4%
792
35%
792
10%
2102
November1st to 10thNight
33%
776
12%
2666
10%
776
37%
776
12%
1972
November11th to 20thNight
29%
992
9%
2992
6%
992
31%
992
10%
2399
November21st to endNight
32%
1040
12%
3040
8%
1040
36%
1040
14%
2306
December1st to 10thNight
30%
1040
11%
3182
7%
1040
33%
1040
11%
2465
December11th to 20thNight
39%
1039
13%
3888
7%
1039
43%
1039
12%
2784
December21st to endNight
38%
1140
8%
5737
7%
1114
43%
1114
9%
3768

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
11%13%6%11%9%5%6%6%6%7%21%
76869
Night
5%11%6%12%9%5%7%7%7%8%24%
81937
TransparencyDay
60%7%14%15%4
76534
Night
54%8%13%17%7%1
81853
SeeingDay
21%12%22%23%16%5%
16012
Night
14%11%22%30%19%4
23656

By Month

Percentage Cloud Cover NW (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
211%6%14%12%7%7%8%8%12%13%
1579
11th to 20thDay
18%5%13%14%9%6%6%10%11%17%
1694
21st to endDay
213%6%11%10%6%8%7%8%8%21%
2442
February1st to 10thDay
211%7%10%9%5%7%7%7%9%26%
1288
11th to 20thDay
112%9%17%10%46%5%6%8%23%
1479
21st to endDay
15%6%15%11%7%8%8%7%8%22%
1332
March1st to 10thDay
17%6%15%10%5%8%8%8%8%24%
1710
11th to 20thDay
19%6%16%13%7%9%8%7%6%17%
1980
21st to endDay
111%10%19%12%45%5%5%7%21%
2208
April1st to 10thDay
313%8%15%12%5%8%6%6%6%17%
2322
11th to 20thDay
315%9%14%9%5%6%7%6%7%20%
2316
21st to endDay
6%18%8%12%10%46%6%5%6%18%
2575
May1st to 10thDay
7%17%7%10%8%46%6%6%8%22%
2700
11th to 20thDay
9%13%5%8%7%46%6%6%8%29%
2767
21st to endDay
13%13%46%6%46%6%7%7%28%
3227
June1st to 10thDay
15%14%49%7%5%6%5%7%8%20%
3060
11th to 20thDay
19%12%5%10%8%5%6%5%5%8%18%
3060
21st to endDay
20%11%5%9%7%46%6%6%7%19%
3060
July1st to 10thDay
22%11%5%8%7%5%5%5%5%7%20%
3060
11th to 20thDay
24%13%5%8%7%5%6%5%5%6%16%
3060
21st to endDay
22%11%5%9%8%45%5%5%5%21%
3056
August1st to 10thDay
18%11%48%7%46%6%6%7%22%
2686
11th to 20thDay
21%12%5%9%8%45%5%47%20%
2606
21st to endDay
22%16%5%8%7%45%5%5%5%19%
2574
September1st to 10thDay
19%16%5%8%7%45%45%5%23%
2302
11th to 20thDay
13%16%5%9%8%5%6%5%7%6%22%
2084
21st to endDay
12%16%6%10%9%46%5%6%6%20%
1953
October1st to 10thDay
7%19%5%11%8%45%5%5%7%25%
1800
11th to 20thDay
5%16%5%9%8%6%8%8%7%8%19%
1653
21st to endDay
5%15%6%11%7%5%6%7%8%8%23%
1584
November1st to 10thDay
318%7%13%7%35%5%6%8%23%
1410
11th to 20thDay
215%8%12%14%7%6%8%7%8%15%
1169
21st to endDay
110%7%12%9%6%8%6%9%11%22%
1140
December1st to 10thDay
310%7%12%9%7%7%7%9%10%20%
993
11th to 20thDay
110%7%13%10%37%8%7%11%22%
1202
21st to endDay
19%6%13%8%48%7%8%10%27%
1738
January1st to 10thNight
18%5%14%14%5%8%7%8%10%18%
5366
11th to 20thNight
18%5%11%11%6%7%6%10%10%23%
5234
21st to endNight
215%8%15%11%5%7%6%6%7%18%
5214
February1st to 10thNight
39%6%13%11%5%7%8%7%7%22%
2766
11th to 20thNight
19%9%16%9%5%6%7%6%8%25%
2366
21st to endNight
18%5%14%12%6%10%7%6%7%24%
1924
March1st to 10thNight
27%7%12%11%6%6%7%8%9%24%
2249
11th to 20thNight
19%9%16%13%6%7%7%5%7%20%
1979
21st to endNight
113%9%15%10%5%6%5%6%7%22%
2148
April1st to 10thNight
310%6%12%11%5%7%6%7%8%26%
1637
11th to 20thNight
312%7%10%8%47%6%7%8%28%
1593
21st to endNight
5%17%6%11%7%46%7%5%8%24%
1382
May1st to 10thNight
7%14%5%8%7%5%6%8%6%8%25%
1260
11th to 20thNight
8%11%48%6%45%46%8%36%
1127
21st to endNight
11%11%27%6%37%6%6%9%32%
1045
June1st to 10thNight
13%10%37%7%5%7%7%7%8%28%
900
11th to 20thNight
16%9%47%7%36%6%8%7%25%
900
21st to endNight
17%9%46%7%447%8%7%28%
900
July1st to 10thNight
19%10%35%6%35%5%6%8%30%
900
11th to 20thNight
17%10%5%8%6%46%5%6%9%24%
900
21st to endNight
11%9%48%7%48%7%8%8%27%
1258
August1st to 10thNight
13%9%46%6%46%5%7%7%33%
1253
11th to 20thNight
15%11%46%6%36%5%7%8%29%
1290
21st to endNight
20%14%48%7%45%5%6%6%22%
1782
September1st to 10thNight
13%13%5%8%6%35%6%6%7%29%
1658
11th to 20thNight
11%13%38%7%46%8%7%9%25%
1873
21st to endNight
10%15%48%8%5%6%6%7%8%24%
2007
October1st to 10thNight
7%17%5%9%7%5%6%5%6%7%24%
2160
11th to 20thNight
6%14%5%9%8%46%6%6%10%26%
2306
21st to endNight
6%13%7%12%8%5%7%6%7%8%21%
2772
November1st to 10thNight
415%7%11%8%5%6%6%6%9%23%
2666
11th to 20thNight
212%8%14%11%5%8%6%7%8%17%
2992
21st to endNight
211%6%13%9%5%8%9%6%8%23%
3040
December1st to 10thNight
311%5%13%11%5%7%7%8%8%20%
3182
11th to 20thNight
19%8%12%9%5%8%8%8%8%25%
3990
21st to endNight
19%5%13%10%5%7%6%7%9%27%
5918

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
59%8%10%12%10%1
1579
11th to 20thDay
58%5%7%13%16%1
1710
21st to endDay
56%9%12%17%6%1
2442
February1st to 10thDay
52%8%12%17%10%1
1288
11th to 20thDay
58%9%13%15%6%
1487
21st to endDay
54%8%11%18%6%2
1332
March1st to 10thDay
51%8%9%21%10%1
1710
11th to 20thDay
62%8%12%14%4
1980
21st to endDay
62%6%13%14%5%
2208
April1st to 10thDay
65%7%11%14%3
2322
11th to 20thDay
62%6%12%17%4
2316
21st to endDay
65%6%13%13%3
2575
May1st to 10thDay
59%7%19%13%2
2700
11th to 20thDay
54%6%16%17%8%
2771
21st to endDay
53%6%15%22%4
3228
June1st to 10thDay
60%6%14%17%3
3060
11th to 20thDay
65%5%12%14%3
3060
21st to endDay
63%7%15%13%2
3060
July1st to 10thDay
62%6%15%16%1
2976
11th to 20thDay
67%7%15%9%1
2967
21st to endDay
63%7%15%14%2
2885
August1st to 10thDay
59%8%17%15%2
2668
11th to 20thDay
64%6%16%13%1
2606
21st to endDay
66%5%14%11%3
2574
September1st to 10thDay
63%7%11%14%5%
2302
11th to 20thDay
60%7%15%17%2
2084
21st to endDay
62%7%14%14%3
1953
October1st to 10thDay
59%7%14%16%4
1800
11th to 20thDay
58%10%15%15%3
1653
21st to endDay
55%9%17%15%5%
1584
November1st to 10thDay
57%7%13%16%5%1
1410
11th to 20thDay
65%8%10%12%5%
1169
21st to endDay
53%8%15%16%6%2
1140
December1st to 10thDay
55%10%13%17%31
993
11th to 20thDay
51%11%10%20%7%1
1204
21st to endDay
46%10%12%20%10%3
1738
January1st to 10thNight
57%8%9%15%9%1
5366
11th to 20thNight
50%7%8%14%18%3
5280
21st to endNight
62%7%11%14%5%1
5214
February1st to 10thNight
56%8%8%16%10%1
2766
11th to 20thNight
55%7%16%14%8%1
2369
21st to endNight
54%7%11%17%9%1
1924
March1st to 10thNight
53%6%10%20%10%1
2249
11th to 20thNight
62%6%11%15%6%
1980
21st to endNight
59%7%12%15%7%
2148
April1st to 10thNight
54%7%13%21%4
1637
11th to 20thNight
52%7%15%19%7%
1593
21st to endNight
56%8%15%18%3
1382
May1st to 10thNight
53%10%18%17%3
1260
11th to 20thNight
46%6%19%21%9%
1127
21st to endNight
48%6%15%27%5%
1045
June1st to 10thNight
52%6%16%22%4
900
11th to 20thNight
53%8%16%20%3
900
21st to endNight
50%9%21%17%3
900
July1st to 10thNight
51%6%20%22%2
875
11th to 20thNight
54%8%22%15%1
870
21st to endNight
49%9%22%17%2
1189
August1st to 10thNight
48%7%23%20%2
1246
11th to 20thNight
51%9%23%16%1
1290
21st to endNight
61%7%17%15%
1782
September1st to 10thNight
54%7%16%16%6%1
1658
11th to 20thNight
53%8%19%17%2
1873
21st to endNight
55%8%16%16%4
2007
October1st to 10thNight
57%8%15%17%4
2160
11th to 20thNight
53%8%16%21%3
2306
21st to endNight
58%8%15%16%4
2772
November1st to 10thNight
55%9%14%16%42
2666
11th to 20thNight
61%10%11%14%4
2992
21st to endNight
55%8%12%16%7%2
3040
December1st to 10thNight
58%9%11%18%5%1
3182
11th to 20thNight
51%8%11%22%7%
3987
21st to endNight
47%10%13%19%10%1
5918

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
11%5%19%36%20%9%
180
11th to 20thDay
13%9%19%27%23%9%
180
21st to endDay
21%13%17%28%19%3
198
February1st to 10thDay
17%11%27%32%11%2
168
11th to 20thDay
16%17%27%23%12%5%
329
21st to endDay
9%15%31%26%13%6%
280
March1st to 10thDay
8%13%32%24%16%7%
352
11th to 20thDay
11%13%32%26%13%6%
420
21st to endDay
11%15%30%25%15%4
462
April1st to 10thDay
14%12%34%24%11%5%
420
11th to 20thDay
15%13%31%23%13%6%
412
21st to endDay
20%16%30%20%12%3
475
May1st to 10thDay
19%12%29%19%17%4
603
11th to 20thDay
15%7%20%27%22%9%
736
21st to endDay
18%7%19%24%23%9%
874
June1st to 10thDay
23%9%17%25%19%6%
810
11th to 20thDay
28%9%17%25%16%5%
810
21st to endDay
22%11%17%22%21%7%
810
July1st to 10thDay
27%6%16%25%19%7%
796
11th to 20thDay
29%9%17%20%18%7%
792
21st to endDay
27%10%19%23%17%4
744
August1st to 10thDay
24%9%18%25%18%7%
626
11th to 20thDay
35%16%23%16%8%2
571
21st to endDay
31%14%20%18%13%4
495
September1st to 10thDay
32%16%18%20%10%4
450
11th to 20thDay
24%13%25%21%14%3
450
21st to endDay
32%18%24%16%9%2
450
October1st to 10thDay
29%18%22%20%11%1
450
11th to 20thDay
21%16%31%18%12%3
373
21st to endDay
15%15%23%26%16%5%
198
November1st to 10thDay
17%13%21%24%19%6%
180
11th to 20thDay
10%16%23%28%17%7%
180
21st to endDay
14%14%24%29%11%8%
180
December1st to 10thDay
9%17%27%23%19%4
180
11th to 20thDay
12%12%25%30%16%6%
180
21st to endDay
11%7%17%34%23%9%
198
January1st to 10thNight
7%10%27%35%17%3
1040
11th to 20thNight
12%15%23%31%16%3
982
21st to endNight
14%14%25%30%15%2
935
February1st to 10thNight
11%14%22%35%16%3
822
11th to 20thNight
9%11%28%33%17%2
746
21st to endNight
6%10%21%37%22%4
592
March1st to 10thNight
7%11%28%32%18%5%
720
11th to 20thNight
7%10%30%34%17%2
720
21st to endNight
8%9%23%31%21%8%
792
April1st to 10thNight
10%10%20%29%25%6%
557
11th to 20thNight
11%7%19%31%25%7%
525
21st to endNight
18%8%22%30%20%2
360
May1st to 10thNight
16%8%17%32%22%5%
360
11th to 20thNight
17%313%32%31%3
354
21st to endNight
18%5%11%25%32%9%
389
June1st to 10thNight
18%5%12%30%32%4
360
11th to 20thNight
20%6%13%25%32%4
360
21st to endNight
21%6%14%19%35%4
360
July1st to 10thNight
23%7%12%27%28%4
350
11th to 20thNight
22%7%13%22%30%5%
348
21st to endNight
14%7%15%29%32%4
394
August1st to 10thNight
19%6%11%21%37%6%
358
11th to 20thNight
22%11%19%29%17%2
356
21st to endNight
27%10%13%24%23%4
594
September1st to 10thNight
23%11%17%25%20%4
578
11th to 20thNight
20%13%18%28%18%4
720
21st to endNight
24%19%19%24%12%2
720
October1st to 10thNight
24%13%20%29%13%1
720
11th to 20thNight
18%17%24%27%12%2
720
21st to endNight
16%13%22%29%16%4
792
November1st to 10thNight
15%12%21%33%17%2
776
11th to 20thNight
11%14%24%29%18%4
992
21st to endNight
14%11%27%31%14%2
1040
December1st to 10thNight
14%14%27%30%13%2
1040
11th to 20thNight
10%11%24%34%16%5%
1040
21st to endNight
8%12%21%33%21%6%
1144
Page generated at 2024-02-02 03:20:32. Version ac07

Copyright 2024 Attilla Danko


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