Wolf Point
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Wolf Point clear sky chart from 2005-11-06 to 2024-01-16.

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
45%
24692
17%
74191
11%
24652
50%
24652
28%
46265

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
39%
946
15%
2647
7%
946
46%
946
24%
1795
January11th to 20thNight
38%
930
15%
2604
8%
930
44%
930
24%
1758
January21st to endNight
32%
990
14%
2772
6%
990
37%
990
19%
2028
February1st to 10thNight
39%
764
12%
2384
8%
764
45%
764
19%
1654
February11th to 20thNight
35%
700
12%
2273
9%
700
39%
700
19%
1561
February21st to endNight
46%
592
19%
1808
13%
592
52%
592
25%
1209
March1st to 10thNight
41%
720
14%
2160
8%
720
46%
720
24%
1455
March11th to 20thNight
44%
720
19%
2021
12%
720
49%
720
29%
1324
March21st to endNight
42%
661
13%
2047
10%
661
47%
661
20%
1428
April1st to 10thNight
41%
540
18%
1800
14%
540
48%
540
24%
1140
April11th to 20thNight
34%
533
15%
1777
11%
533
40%
533
21%
1199
April21st to endNight
43%
540
17%
1549
12%
540
48%
540
27%
1026
May1st to 10thNight
49%
540
14%
1440
9%
540
52%
540
32%
933
May11th to 20thNight
52%
531
17%
1418
11%
531
54%
531
32%
913
May21st to endNight
48%
584
11%
1552
6%
582
49%
582
27%
1061
June1st to 10thNight
48%
540
11%
1440
6%
540
50%
540
32%
932
June11th to 20thNight
44%
460
9%
1360
5%
460
48%
460
32%
826
June21st to endNight
57%
360
12%
1260
11%
360
62%
360
35%
665
July1st to 10thNight
61%
418
13%
1293
10%
418
64%
418
45%
658
July11th to 20thNight
56%
522
16%
1392
8%
522
61%
522
46%
786
July21st to endNight
65%
591
24%
1488
16%
558
68%
558
56%
756
August1st to 10thNight
61%
537
22%
1424
14%
534
66%
534
47%
798
August11th to 20thNight
65%
534
27%
1536
20%
534
69%
534
49%
802
August21st to endNight
63%
594
27%
1944
24%
594
70%
594
45%
962
September1st to 10thNight
62%
540
26%
1800
24%
540
71%
540
41%
922
September11th to 20thNight
58%
540
27%
1800
26%
540
65%
540
37%
960
September21st to endNight
53%
598
25%
2023
23%
598
60%
598
35%
1102
October1st to 10thNight
48%
720
21%
2160
16%
720
53%
720
30%
1323
October11th to 20thNight
48%
720
24%
2160
14%
720
55%
720
31%
1298
October21st to endNight
39%
976
20%
2560
9%
976
46%
976
32%
1644
November1st to 10thNight
39%
925
20%
2482
11%
925
44%
925
28%
1657
November11th to 20thNight
37%
950
20%
2660
10%
950
45%
950
27%
1727
November21st to endNight
39%
950
17%
2660
8%
950
46%
950
28%
1723
December1st to 10thNight
37%
950
14%
2660
7%
950
43%
950
23%
1854
December11th to 20thNight
39%
948
17%
3188
9%
948
46%
948
20%
2095
December21st to endNight
35%
1028
12%
4649
7%
1026
42%
1026
18%
2291

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
9%6%36%5%35%5%6%8%44%
75151
Night
7%7%36%6%35%5%6%8%45%
74679
TransparencyDay
37%8%16%25%13%2
74853
Night
36%7%16%25%13%2
74499
SeeingDay
10%8%29%32%17%4
14929
Night
10%7%30%39%13%1
24719

By Month

Percentage Cloud Cover SW (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
410%37%7%48%7%7%10%33%
1518
11th to 20thDay
6%9%410%9%46%6%5%8%33%
1484
21st to endDay
5%9%5%8%10%5%7%7%7%8%30%
1584
February1st to 10thDay
7%10%311%8%48%6%6%8%28%
1593
11th to 20thDay
7%12%5%10%9%5%6%6%7%7%28%
1575
21st to endDay
5%10%410%7%5%6%5%7%9%31%
1448
March1st to 10thDay
7%9%5%11%9%46%5%5%8%30%
1800
11th to 20thDay
7%8%47%5%35%6%6%9%39%
1935
21st to endDay
9%11%46%7%35%6%7%9%34%
2308
April1st to 10thDay
8%7%47%7%46%6%7%7%38%
2160
11th to 20thDay
13%10%46%7%46%45%7%33%
2131
21st to endDay
13%9%47%6%35%6%6%6%36%
2408
May1st to 10thDay
14%7%35%6%345%6%8%41%
2520
11th to 20thDay
13%5%25%445%5%6%7%44%
2478
21st to endDay
18%6%36%5%35%5%6%8%33%
2724
June1st to 10thDay
11%4345%45%5%5%9%44%
2520
11th to 20thDay
11%5%35%5%36%5%6%8%45%
2594
21st to endDay
5%324435%6%7%8%53%
2700
July1st to 10thDay
5%3134245%7%9%57%
2622
11th to 20thDay
421342445%8%62%
2520
21st to endDay
4213435%45%8%63%
2742
August1st to 10thDay
6%31442345%8%59%
2507
11th to 20thDay
6%42443345%7%58%
2364
21st to endDay
7%3133345%5%6%60%
2412
September1st to 10thDay
11%5%24424447%55%
2160
11th to 20thDay
11%42443345%7%53%
2160
21st to endDay
12%5%2442345%7%51%
1933
October1st to 10thDay
14%7%25%43345%6%46%
1800
11th to 20thDay
9%6%36%445%6%5%8%46%
1796
21st to endDay
10%7%36%4335%5%8%45%
1782
November1st to 10thDay
11%8%46%6%335%5%6%43%
1593
11th to 20thDay
5%7%38%5%345%6%8%46%
1520
21st to endDay
6%8%5%9%7%36%5%6%8%37%
1520
December1st to 10thDay
8%10%5%10%9%45%5%6%7%33%
1520
11th to 20thDay
49%5%8%6%47%6%6%7%38%
1926
21st to endDay
5%7%36%6%45%5%6%9%43%
2794
January1st to 10thNight
5%7%37%7%46%7%8%9%36%
2647
11th to 20thNight
6%9%47%7%46%5%6%9%39%
2604
21st to endNight
5%11%5%10%7%5%5%6%7%8%30%
2772
February1st to 10thNight
8%9%49%9%46%5%6%7%33%
2384
11th to 20thNight
6%10%5%8%7%46%6%6%7%34%
2272
21st to endNight
5%9%5%9%7%36%45%6%41%
1808
March1st to 10thNight
6%8%49%7%45%5%7%9%37%
2160
11th to 20thNight
7%7%47%5%345%7%9%41%
2021
21st to endNight
8%9%48%8%46%6%6%8%34%
2047
April1st to 10thNight
7%7%5%7%7%345%5%7%42%
1800
11th to 20thNight
12%8%5%7%6%35%6%5%6%37%
1777
21st to endNight
11%8%36%4346%6%8%40%
1549
May1st to 10thNight
12%6%36%6%3446%7%44%
1440
11th to 20thNight
12%5%245%35%5%6%8%45%
1417
21st to endNight
15%5%25%5%35%5%7%8%40%
1552
June1st to 10thNight
9%6%26%435%5%5%10%44%
1440
11th to 20thNight
8%4345%45%46%10%47%
1360
21st to endNight
5%4245%3446%9%54%
1260
July1st to 10thNight
5%22341445%9%59%
1332
11th to 20thNight
5%224435%5%48%59%
1440
21st to endNight
32123245%5%7%66%
1576
August1st to 10thNight
5%223434448%60%
1432
11th to 20thNight
5%31332345%8%62%
1536
21st to endNight
6%32332345%7%62%
1944
September1st to 10thNight
8%3144235%48%58%
1800
11th to 20thNight
9%32442446%6%58%
1800
21st to endNight
11%42432345%7%54%
2023
October1st to 10thNight
11%5%36%5%2445%6%49%
2160
11th to 20thNight
9%6%25%5%3436%7%50%
2160
21st to endNight
9%7%25%5%345%6%9%45%
2560
November1st to 10thNight
11%9%36%5%25%5%5%7%43%
2482
11th to 20thNight
6%7%48%6%35%5%6%8%42%
2660
21st to endNight
6%8%5%7%6%445%6%9%42%
2660
December1st to 10thNight
6%9%5%9%8%45%5%6%8%35%
2660
11th to 20thNight
49%48%7%45%5%7%8%39%
3271
21st to endNight
5%7%35%5%345%6%8%49%
4873

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
43%10%17%23%6%
1519
11th to 20thDay
48%9%17%19%6%1
1484
21st to endDay
48%10%17%17%7%
1584
February1st to 10thDay
51%7%15%17%9%
1593
11th to 20thDay
54%8%15%15%7%
1584
21st to endDay
48%9%16%18%8%2
1448
March1st to 10thDay
51%9%15%18%6%
1800
11th to 20thDay
41%9%19%24%7%
1935
21st to endDay
44%10%20%20%6%1
2308
April1st to 10thDay
41%8%18%21%11%1
2160
11th to 20thDay
49%8%14%20%8%1
2134
21st to endDay
45%8%12%23%10%
2408
May1st to 10thDay
40%6%14%26%11%2
2520
11th to 20thDay
38%8%14%27%12%1
2482
21st to endDay
47%10%16%20%8%
2724
June1st to 10thDay
36%8%18%26%11%1
2520
11th to 20thDay
35%8%19%25%11%2
2594
21st to endDay
25%9%18%32%14%2
2700
July1st to 10thDay
20%8%16%32%18%7%
2552
11th to 20thDay
20%5%13%28%24%9%
2445
21st to endDay
19%6%10%30%29%6%
2590
August1st to 10thDay
23%6%12%30%23%6%
2491
11th to 20thDay
25%6%11%31%22%5%
2364
21st to endDay
24%6%11%29%26%4
2412
September1st to 10thDay
30%5%10%29%20%6%
2160
11th to 20thDay
31%6%16%27%17%4
2160
21st to endDay
32%6%9%29%20%2
1933
October1st to 10thDay
39%6%16%24%13%2
1800
11th to 20thDay
35%7%15%28%14%1
1796
21st to endDay
35%9%21%24%10%1
1782
November1st to 10thDay
42%7%13%25%11%2
1593
11th to 20thDay
34%7%24%24%10%1
1520
21st to endDay
43%8%24%18%6%1
1520
December1st to 10thDay
49%9%14%22%6%
1520
11th to 20thDay
41%9%25%20%5%
1924
21st to endDay
36%7%11%30%13%3
2794
January1st to 10thNight
40%10%21%21%7%1
2647
11th to 20thNight
41%8%22%22%6%1
2604
21st to endNight
48%10%16%17%8%1
2772
February1st to 10thNight
48%7%18%19%8%
2384
11th to 20thNight
45%9%18%19%8%1
2273
21st to endNight
43%7%15%23%12%
1808
March1st to 10thNight
41%9%20%21%8%
2160
11th to 20thNight
37%9%15%27%11%
2021
21st to endNight
45%9%17%20%7%1
2047
April1st to 10thNight
40%7%13%26%12%2
1800
11th to 20thNight
46%7%12%23%11%1
1777
21st to endNight
41%7%14%26%12%1
1549
May1st to 10thNight
37%6%14%24%17%2
1440
11th to 20thNight
36%8%12%30%14%1
1418
21st to endNight
40%9%16%25%10%1
1552
June1st to 10thNight
35%8%15%25%16%2
1440
11th to 20thNight
32%9%19%24%14%2
1360
21st to endNight
26%8%18%29%16%3
1260
July1st to 10thNight
21%6%17%31%19%6%
1293
11th to 20thNight
24%6%14%25%24%8%
1392
21st to endNight
15%6%11%30%29%9%
1488
August1st to 10thNight
22%7%14%29%19%9%
1424
11th to 20thNight
20%6%14%31%22%7%
1536
21st to endNight
21%6%12%26%29%8%
1944
September1st to 10thNight
23%6%11%29%22%8%
1800
11th to 20thNight
26%7%13%28%20%6%
1800
21st to endNight
31%413%29%22%2
2023
October1st to 10thNight
36%6%13%25%16%3
2160
11th to 20thNight
34%5%13%31%15%2
2160
21st to endNight
34%8%18%25%13%2
2560
November1st to 10thNight
40%7%15%24%12%3
2482
11th to 20thNight
39%7%20%25%7%2
2660
21st to endNight
38%7%22%23%9%1
2660
December1st to 10thNight
45%8%19%21%7%
2660
11th to 20thNight
39%10%19%25%6%
3272
21st to endNight
32%6%14%30%15%4
4873

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
8%7%33%30%17%5%
270
11th to 20thDay
10%10%28%33%15%4
257
21st to endDay
10%12%36%33%8%1
264
February1st to 10thDay
12%9%40%33%5%1
240
11th to 20thDay
10%9%36%31%13%
240
21st to endDay
10%5%34%32%17%2
198
March1st to 10thDay
11%13%33%28%14%1
240
11th to 20thDay
11%9%35%26%13%5%
375
21st to endDay
11%9%32%30%15%4
462
April1st to 10thDay
12%13%36%33%6%
420
11th to 20thDay
18%16%36%21%8%1
412
21st to endDay
16%11%27%32%13%1
540
May1st to 10thDay
14%7%25%32%17%5%
603
11th to 20thDay
15%8%25%26%20%6%
625
21st to endDay
15%8%26%26%19%6%
679
June1st to 10thDay
9%11%25%30%21%3
630
11th to 20thDay
11%15%31%29%10%3
630
21st to endDay
6%7%25%35%21%5%
630
July1st to 10thDay
6%326%39%22%4
621
11th to 20thDay
47%28%42%16%4
618
21st to endDay
5%226%36%26%5%
684
August1st to 10thDay
6%425%38%21%7%
626
11th to 20thDay
6%6%24%31%26%7%
502
21st to endDay
8%5%21%35%25%5%
495
September1st to 10thDay
9%9%26%36%16%4
450
11th to 20thDay
12%8%23%29%26%3
450
21st to endDay
16%5%28%21%25%5%
284
October1st to 10thDay
20%7%23%29%14%8%
270
11th to 20thDay
10%9%35%26%16%4
270
21st to endDay
14%15%32%25%11%2
297
November1st to 10thDay
17%9%31%25%17%1
270
11th to 20thDay
6%11%35%32%13%3
270
21st to endDay
6%9%36%34%14%1
270
December1st to 10thDay
8%9%37%31%13%1
270
11th to 20thDay
12%9%35%32%11%1
270
21st to endDay
10%6%29%34%16%5%
297
January1st to 10thNight
7%8%35%37%11%2
950
11th to 20thNight
9%10%33%35%12%1
930
21st to endNight
9%10%37%35%8%1
990
February1st to 10thNight
11%7%30%36%15%1
764
11th to 20thNight
10%7%36%38%9%1
704
21st to endNight
9%5%27%36%19%4
592
March1st to 10thNight
8%8%33%39%10%1
720
11th to 20thNight
10%6%31%39%13%1
720
21st to endNight
10%8%28%39%13%1
661
April1st to 10thNight
9%9%34%40%8%1
540
11th to 20thNight
15%9%35%34%7%
533
21st to endNight
14%8%29%39%10%
540
May1st to 10thNight
15%424%41%15%1
540
11th to 20thNight
13%5%24%39%19%1
531
21st to endNight
15%7%23%34%19%1
584
June1st to 10thNight
11%7%29%35%17%
540
11th to 20thNight
10%8%34%38%11%
460
21st to endNight
6%6%25%46%16%1
360
July1st to 10thNight
7%228%46%16%1
418
11th to 20thNight
5%5%30%52%8%
522
21st to endNight
4424%53%15%
591
August1st to 10thNight
6%326%49%15%1
537
11th to 20thNight
5%423%47%19%2
534
21st to endNight
6%422%46%21%
594
September1st to 10thNight
9%420%48%19%1
540
11th to 20thNight
11%324%41%19%1
540
21st to endNight
14%426%40%15%1
598
October1st to 10thNight
12%6%27%38%15%1
720
11th to 20thNight
11%9%27%37%15%1
720
21st to endNight
12%7%35%34%11%1
976
November1st to 10thNight
14%10%30%37%9%1
925
11th to 20thNight
8%9%36%35%11%1
950
21st to endNight
8%9%35%39%9%
950
December1st to 10thNight
9%6%35%35%14%1
950
11th to 20thNight
8%9%32%38%12%1
950
21st to endNight
12%7%31%35%15%
1045
Page generated at 2024-01-13 17:28:34. Version ac07

Copyright 2024 Attilla Danko


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