Lake of the Woods (North-East)
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Lake of the Woods (North-East) clear sky chart from 2005-11-06 to 2024-01-11.

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
32%
25089
7%
74758
4%
25030
35%
25030
9%
61730

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
26%
950
5%
2837
3%
946
29%
946
6%
2493
January11th to 20thNight
22%
905
3%
2713
1%
905
25%
905
4%
2451
January21st to endNight
25%
990
5%
2821
2%
990
28%
990
7%
2444
February1st to 10thNight
31%
900
8%
2340
3%
900
33%
900
10%
1968
February11th to 20thNight
35%
878
13%
2274
6%
875
38%
875
15%
1805
February21st to endNight
30%
740
8%
1924
4%
740
33%
740
9%
1647
March1st to 10thNight
31%
637
8%
2080
4%
637
34%
637
8%
1718
March11th to 20thNight
27%
540
11%
1980
6%
540
36%
540
9%
1551
March21st to endNight
36%
594
11%
2178
10%
594
41%
594
9%
1704
April1st to 10thNight
35%
540
10%
1799
8%
540
41%
540
11%
1401
April11th to 20thNight
34%
533
13%
1599
10%
533
39%
533
12%
1258
April21st to endNight
34%
540
9%
1620
5%
540
38%
540
11%
1293
May1st to 10thNight
31%
540
10%
1454
3%
540
34%
540
13%
1169
May11th to 20thNight
37%
531
9%
1416
3%
531
40%
531
15%
1123
May21st to endNight
38%
584
8%
1362
3%
582
41%
582
15%
1113
June1st to 10thNight
40%
540
4%
1260
2%
540
42%
540
16%
1025
June11th to 20thNight
37%
540
4%
1260
2%
540
40%
540
17%
1019
June21st to endNight
49%
540
4%
1260
2%
540
51%
540
18%
996
July1st to 10thNight
58%
525
6%
1225
4%
525
60%
525
24%
912
July11th to 20thNight
49%
522
7%
1218
4%
522
51%
522
21%
941
July21st to endNight
59%
591
10%
1319
4%
558
60%
558
21%
1006
August1st to 10thNight
56%
537
12%
1516
5%
534
58%
534
20%
1082
August11th to 20thNight
52%
534
11%
1600
7%
534
56%
534
16%
1187
August21st to endNight
49%
594
12%
1782
10%
594
53%
594
16%
1327
September1st to 10thNight
47%
540
10%
1782
11%
540
49%
540
15%
1305
September11th to 20thNight
39%
540
12%
1889
12%
540
43%
540
13%
1414
September21st to endNight
33%
562
12%
2002
9%
562
39%
562
11%
1511
October1st to 10thNight
25%
720
10%
2160
5%
720
29%
720
11%
1730
October11th to 20thNight
27%
720
8%
2160
4%
720
30%
720
8%
1829
October21st to endNight
22%
918
5%
2565
2%
918
25%
918
7%
2221
November1st to 10thNight
20%
925
6%
2591
1%
925
24%
925
7%
2250
November11th to 20thNight
19%
950
7%
2660
3%
950
22%
950
4%
2424
November21st to endNight
14%
950
3%
2660
1%
950
17%
950
5%
2397
December1st to 10thNight
23%
950
1%
2831
0%
950
24%
950
3%
2643
December11th to 20thNight
15%
950
5%
3453
1%
949
18%
949
3%
2946
December21st to endNight
20%
1039
2%
5168
1%
1026
23%
1026
2%
4427

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
13%9%48%7%45%5%6%7%32%
74685
Night
12%10%5%8%7%45%5%6%7%31%
75031
TransparencyDay
33%39%10%13%5%
74370
Night
35%38%9%12%5%
74879
SeeingDay
16%13%33%25%10%2
15040
Night
17%10%33%29%11%1
25099

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 10thDay
9%13%6%11%8%5%6%6%8%7%20%
1328
11th to 20thDay
8%12%7%13%9%5%7%7%8%6%17%
1260
21st to endDay
12%14%7%14%10%5%7%7%7%5%11%
1533
February1st to 10thDay
8%11%6%9%8%48%7%7%8%23%
1620
11th to 20thDay
7%10%5%9%8%5%7%5%7%8%29%
1574
21st to endDay
6%11%6%13%8%48%6%6%8%25%
1332
March1st to 10thDay
10%12%7%10%7%35%6%5%6%29%
1892
11th to 20thDay
10%9%6%9%9%35%46%7%32%
1980
21st to endDay
13%10%5%8%7%445%46%34%
2178
April1st to 10thDay
12%10%48%6%3445%6%36%
2158
11th to 20thDay
14%9%48%7%35%45%6%34%
2312
21st to endDay
15%8%37%6%46%5%6%7%32%
2340
May1st to 10thDay
16%8%37%5%4445%6%37%
2506
11th to 20thDay
17%8%36%6%3445%8%36%
2479
21st to endDay
19%7%36%5%35%446%38%
2911
June1st to 10thDay
14%6%36%6%46%5%6%9%35%
2700
11th to 20thDay
16%6%35%6%36%5%6%8%35%
2700
21st to endDay
14%6%37%6%46%6%7%9%33%
2700
July1st to 10thDay
9%4245%35%6%6%8%47%
2700
11th to 20thDay
12%5%25%6%36%5%6%9%41%
2700
21st to endDay
9%5%24445%6%7%9%45%
2921
August1st to 10thDay
9%6%35%5%45%6%7%9%41%
2411
11th to 20thDay
12%5%245%36%5%7%9%43%
2301
21st to endDay
14%5%25%6%35%5%5%7%43%
2574
September1st to 10thDay
13%5%35%5%446%6%7%42%
2178
11th to 20thDay
16%7%37%6%46%5%6%8%33%
2070
21st to endDay
21%7%36%5%23446%39%
1940
October1st to 10thDay
20%12%5%7%6%3446%6%27%
1800
11th to 20thDay
18%13%6%8%6%3445%5%29%
1800
21st to endDay
17%19%6%9%7%45%43421%
1790
November1st to 10thDay
17%15%7%10%7%5%444423%
1487
11th to 20thDay
13%16%9%14%10%5%5%33419%
1520
21st to endDay
15%15%5%15%12%44446%16%
1520
December1st to 10thDay
9%12%6%17%11%5%7%7%6%5%15%
1349
11th to 20thDay
9%16%7%11%10%36%5%6%6%20%
1679
21st to endDay
14%12%8%14%9%45%45%6%18%
2442
January1st to 10thNight
7%13%6%12%9%6%7%6%8%7%21%
2837
11th to 20thNight
11%12%6%13%9%47%7%7%7%17%
2713
21st to endNight
8%15%6%12%9%5%7%8%8%7%16%
2821
February1st to 10thNight
6%11%6%9%9%5%7%6%7%9%26%
2340
11th to 20thNight
8%10%47%5%36%7%8%9%32%
2273
21st to endNight
7%9%6%11%9%5%7%6%6%6%28%
1924
March1st to 10thNight
9%12%6%9%7%45%5%48%32%
2069
11th to 20thNight
10%10%5%8%6%35%35%6%41%
1979
21st to endNight
15%9%47%6%4345%6%38%
2178
April1st to 10thNight
14%8%46%6%3445%6%39%
1799
11th to 20thNight
13%10%46%7%3445%8%37%
1599
21st to endNight
13%8%5%7%7%35%5%6%6%36%
1620
May1st to 10thNight
16%9%45%5%245%48%37%
1454
11th to 20thNight
18%5%25%5%35%5%5%7%40%
1416
21st to endNight
18%5%346%2445%7%43%
1362
June1st to 10thNight
17%7%26%5%3447%8%38%
1260
11th to 20thNight
16%6%25%5%25%45%7%42%
1260
21st to endNight
14%5%35%5%35%47%8%42%
1260
July1st to 10thNight
7%4234245%5%8%56%
1260
11th to 20thNight
8%4145%346%7%11%47%
1260
21st to endNight
7%3134235%6%8%58%
1397
August1st to 10thNight
7%4135%335%6%8%55%
1525
11th to 20thNight
11%5%25%4245%6%9%47%
1600
21st to endNight
12%5%25%43335%7%51%
1782
September1st to 10thNight
13%425%42445%8%48%
1782
11th to 20thNight
17%6%25%5%3345%8%41%
1889
21st to endNight
19%8%35%43345%7%38%
2002
October1st to 10thNight
15%10%36%7%45%45%7%34%
2160
11th to 20thNight
18%13%46%6%445%6%6%29%
2160
21st to endNight
17%14%410%6%45%5%45%25%
2565
November1st to 10thNight
14%15%5%9%6%45%6%6%6%25%
2591
11th to 20thNight
14%15%7%12%10%5%5%5%45%18%
2660
21st to endNight
15%14%7%13%11%45%5%5%5%17%
2660
December1st to 10thNight
7%12%6%15%13%7%7%7%5%6%15%
2831
11th to 20thNight
10%14%6%12%9%46%6%6%6%20%
3518
21st to endNight
11%13%8%12%11%6%6%6%5%6%17%
5225

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
37%42%8%12%1
1329
11th to 20thDay
42%42%6%7%3
1260
21st to endDay
46%39%37%5%
1533
February1st to 10thDay
37%37%7%11%7%1
1620
11th to 20thDay
32%39%9%14%6%1
1583
21st to endDay
38%38%9%11%41
1332
March1st to 10thDay
39%38%9%9%5%
1894
11th to 20thDay
34%39%10%11%6%
1980
21st to endDay
34%39%9%12%6%
2178
April1st to 10thDay
33%37%6%16%7%1
2158
11th to 20thDay
34%38%8%12%8%
2312
21st to endDay
33%39%9%13%6%1
2340
May1st to 10thDay
32%38%8%14%7%1
2506
11th to 20thDay
29%39%9%16%7%1
2483
21st to endDay
31%39%9%11%9%1
2911
June1st to 10thDay
29%40%11%13%7%
2700
11th to 20thDay
29%41%12%14%5%
2700
21st to endDay
27%41%14%13%5%
2700
July1st to 10thDay
19%41%12%21%7%
2626
11th to 20thDay
23%41%11%20%5%
2619
21st to endDay
25%41%12%16%5%1
2759
August1st to 10thDay
26%40%12%17%5%
2396
11th to 20thDay
25%39%14%19%4
2301
21st to endDay
24%40%12%18%6%
2574
September1st to 10thDay
26%38%11%19%6%
2178
11th to 20thDay
29%40%13%15%3
2070
21st to endDay
29%38%11%20%3
1940
October1st to 10thDay
37%38%10%13%3
1800
11th to 20thDay
42%38%6%11%3
1800
21st to endDay
45%39%9%6%1
1790
November1st to 10thDay
39%42%8%8%31
1487
11th to 20thDay
46%41%5%7%2
1520
21st to endDay
42%42%9%6%1
1520
December1st to 10thDay
47%41%6%5%1
1349
11th to 20thDay
43%33%12%11%2
1680
21st to endDay
52%29%6%11%2
2442
January1st to 10thNight
40%42%7%10%2
2837
11th to 20thNight
43%42%5%8%2
2713
21st to endNight
41%39%6%10%4
2821
February1st to 10thNight
36%38%8%11%6%1
2340
11th to 20thNight
28%39%10%16%8%
2274
21st to endNight
38%38%8%10%5%
1924
March1st to 10thNight
37%38%9%10%6%1
2080
11th to 20thNight
33%38%8%14%7%
1980
21st to endNight
33%37%10%12%7%1
2178
April1st to 10thNight
31%37%7%13%11%2
1799
11th to 20thNight
32%36%7%14%10%1
1599
21st to endNight
32%38%8%13%9%1
1620
May1st to 10thNight
31%37%7%14%10%1
1454
11th to 20thNight
27%40%9%15%9%1
1417
21st to endNight
30%38%7%12%12%2
1362
June1st to 10thNight
27%40%11%14%7%1
1260
11th to 20thNight
26%39%10%16%7%1
1260
21st to endNight
25%39%15%14%6%1
1260
July1st to 10thNight
17%39%10%25%7%2
1225
11th to 20thNight
19%41%14%18%7%1
1218
21st to endNight
18%41%11%22%7%1
1319
August1st to 10thNight
18%38%11%25%8%
1516
11th to 20thNight
23%38%13%19%7%
1600
21st to endNight
22%39%11%21%7%1
1782
September1st to 10thNight
24%38%11%19%9%
1782
11th to 20thNight
25%39%11%19%6%
1889
21st to endNight
28%38%10%21%3
2002
October1st to 10thNight
31%39%11%13%5%
2160
11th to 20thNight
38%39%8%12%2
2160
21st to endNight
39%40%9%10%2
2565
November1st to 10thNight
39%41%7%9%31
2591
11th to 20thNight
46%40%47%2
2660
21st to endNight
43%41%9%5%2
2660
December1st to 10thNight
49%41%5%41
2831
11th to 20thNight
45%35%9%8%3
3516
21st to endNight
53%29%8%7%3
5225

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
13%12%37%24%12%1
270
11th to 20thDay
13%13%34%30%8%1
240
21st to endDay
18%13%34%24%9%1
264
February1st to 10thDay
18%10%45%21%5%2
240
11th to 20thDay
13%20%35%20%7%4
240
21st to endDay
13%17%48%15%6%2
198
March1st to 10thDay
12%12%39%28%7%2
240
11th to 20thDay
13%17%35%25%7%3
240
21st to endDay
13%17%34%28%8%
264
April1st to 10thDay
19%15%33%22%10%1
418
11th to 20thDay
20%15%32%25%8%1
590
21st to endDay
18%12%35%26%9%1
600
May1st to 10thDay
18%16%37%21%5%2
603
11th to 20thDay
20%11%32%24%10%2
625
21st to endDay
20%14%29%27%9%2
679
June1st to 10thDay
17%11%35%23%12%2
630
11th to 20thDay
18%10%37%25%8%2
630
21st to endDay
16%8%31%27%14%5%
630
July1st to 10thDay
11%11%31%27%16%5%
621
11th to 20thDay
13%11%31%27%14%4
618
21st to endDay
9%7%32%27%19%5%
684
August1st to 10thDay
9%11%27%32%16%4
626
11th to 20thDay
12%7%27%33%14%7%
615
21st to endDay
14%11%29%31%14%2
693
September1st to 10thDay
13%13%32%26%14%1
468
11th to 20thDay
21%13%36%23%8%1
360
21st to endDay
28%14%33%20%5%
270
October1st to 10thDay
25%15%30%22%8%
270
11th to 20thDay
20%16%37%26%1
270
21st to endDay
30%19%29%18%41
297
November1st to 10thDay
24%18%33%20%41
270
11th to 20thDay
22%21%33%20%3
270
21st to endDay
26%20%37%13%4
270
December1st to 10thDay
13%15%35%26%10%1
270
11th to 20thDay
15%18%43%20%5%
270
21st to endDay
16%14%36%24%8%2
297
January1st to 10thNight
13%11%35%29%10%2
950
11th to 20thNight
17%9%37%28%7%2
905
21st to endNight
15%9%36%32%7%1
990
February1st to 10thNight
11%8%37%33%9%1
900
11th to 20thNight
13%10%33%29%12%3
879
21st to endNight
11%11%38%25%12%2
740
March1st to 10thNight
13%12%36%28%11%
640
11th to 20thNight
13%10%43%23%10%1
540
21st to endNight
19%8%30%26%13%4
594
April1st to 10thNight
18%9%32%31%9%1
540
11th to 20thNight
19%9%30%29%13%
533
21st to endNight
17%9%32%32%10%
540
May1st to 10thNight
19%9%32%31%7%1
540
11th to 20thNight
21%9%31%26%12%2
531
21st to endNight
20%7%29%32%12%
584
June1st to 10thNight
20%6%26%32%15%1
540
11th to 20thNight
17%7%33%30%11%1
540
21st to endNight
16%6%22%36%19%2
540
July1st to 10thNight
6%5%26%41%20%2
525
11th to 20thNight
12%429%34%20%1
522
21st to endNight
8%425%38%21%4
591
August1st to 10thNight
9%5%25%41%19%1
537
11th to 20thNight
13%7%21%33%21%4
534
21st to endNight
14%7%24%34%19%2
594
September1st to 10thNight
16%7%28%33%14%2
540
11th to 20thNight
19%9%29%28%14%1
540
21st to endNight
23%9%29%25%11%1
562
October1st to 10thNight
21%13%35%25%6%1
720
11th to 20thNight
23%11%32%27%7%1
720
21st to endNight
24%13%33%24%7%
918
November1st to 10thNight
21%13%36%22%7%1
925
11th to 20thNight
22%12%35%23%7%1
950
21st to endNight
23%16%36%19%41
950
December1st to 10thNight
14%10%37%29%9%1
950
11th to 20thNight
18%12%42%22%6%1
950
21st to endNight
18%10%34%26%9%1
1045
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