Lino Lakes
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Lino Lakes clear sky chart from 2005-11-05 to 2017-09-21.

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
38%
16149
16%
46923
9%
16103
44%
16103
24%
31596

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
30%
900
12%
2506
6%
895
36%
895
20%
1827
January16th to endNight
23%
960
11%
2557
4%
960
29%
960
17%
1925
February1st to 15thNight
29%
879
14%
2288
4%
875
35%
875
23%
1640
February16th to endNight
30%
750
15%
2012
5%
750
37%
750
21%
1431
March1st to 15thNight
32%
588
14%
2028
10%
588
39%
588
19%
1356
March16th to endNight
32%
576
15%
2091
12%
576
40%
576
18%
1401
April1st to 15thNight
33%
539
17%
1797
13%
539
42%
539
22%
1182
April16th to endNight
29%
540
16%
1674
10%
540
37%
540
17%
1211
May1st to 15thNight
31%
540
15%
1485
6%
540
37%
540
23%
1043
May16th to endNight
44%
562
15%
1498
6%
561
49%
561
28%
1001
June1st to 15thNight
50%
540
12%
1440
5%
540
53%
540
32%
924
June16th to endNight
57%
540
16%
1440
8%
540
60%
540
41%
859
July1st to 15thNight
62%
510
14%
1360
7%
510
64%
510
43%
795
July16th to endNight
63%
564
19%
1420
10%
531
66%
531
46%
799
August1st to 15thNight
64%
539
21%
1610
18%
536
68%
536
37%
909
August16th to endNight
58%
573
22%
1794
19%
573
65%
573
34%
1028
September1st to 15thNight
61%
540
23%
1800
21%
540
68%
540
35%
967
September16th to endNight
45%
557
19%
1877
14%
557
52%
557
29%
1108
October1st to 15thNight
42%
660
23%
1980
16%
660
48%
660
31%
1188
October16th to endNight
35%
704
15%
2134
8%
704
41%
704
21%
1457
November1st to 15thNight
34%
828
19%
2404
10%
828
42%
828
24%
1595
November16th to endNight
28%
900
14%
2520
8%
900
34%
900
18%
1857
December1st to 15thNight
24%
900
9%
2520
3%
900
30%
900
16%
1934
December16th to endNight
20%
960
11%
2688
3%
960
27%
960
12%
2159

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%8%36%5%3445%7%37%
47948
Night
12%8%36%5%24446%40%
47092
Cloud CoverDay
25%7%25%5%23346%32%
47959
Night
24%7%25%423345%35%
47096
Cloud CoverDay
13%8%36%5%3445%7%36%
47957
Night
12%8%46%5%24446%40%
47096
TransparencyDay
46%5%14%23%9%
47635
Night
44%5%13%23%11%1
46923
SeeingDay
16%6%28%28%15%4
6152
Night
16%7%30%32%12%1
16151

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
9%10%8%7%8%46%437%28%
1432
16th to endDay
9%15%7%9%6%35%45%7%24%
1665
February1st to 15thDay
8%11%7%8%8%445%45%32%
1575
16th to endDay
9%13%6%9%5%35%445%31%
1461
March1st to 15thDay
14%10%5%7%5%3435%6%33%
1930
16th to endDay
18%11%35%5%35%446%31%
2132
April1st to 15thDay
17%9%35%5%3335%5%37%
2151
16th to endDay
22%11%35%425%346%29%
2283
May1st to 15thDay
20%7%35%5%4345%6%32%
2466
16th to endDay
14%7%25%5%35%45%8%37%
2617
June1st to 15thDay
16%5%345%246%5%8%38%
2520
16th to endDay
9%425%6%446%7%9%39%
2520
July1st to 15thDay
8%32442446%8%49%
2520
16th to endDay
7%323435%5%7%9%46%
2649
August1st to 15thDay
9%425%6%36%5%6%8%42%
2340
16th to endDay
13%425%42436%7%47%
2406
September1st to 15thDay
9%4235%35%46%8%46%
2160
16th to endDay
15%5%2443445%6%42%
1863
October1st to 15thDay
16%7%25%423446%44%
1650
16th to endDay
19%9%36%423336%36%
1738
November1st to 15thDay
11%11%5%8%43345%438%
1454
16th to endDay
15%10%37%6%3445%8%30%
1440
December1st to 15thDay
16%12%6%8%9%45%44325%
1440
16th to endDay
18%17%7%11%6%2322422%
1536
January1st to 15thNight
10%9%5%7%6%35%5%5%6%32%
2506
16th to endNight
11%12%6%11%6%34445%29%
2557
February1st to 15thNight
7%11%5%8%6%35%435%38%
2285
16th to endNight
9%8%46%7%5%6%446%36%
2012
March1st to 15thNight
12%9%5%6%5%34446%38%
2016
16th to endNight
17%9%46%5%23346%35%
2091
April1st to 15thNight
18%8%344235%36%38%
1797
16th to endNight
23%8%36%5%23445%32%
1674
May1st to 15thNight
19%6%26%42443440%
1485
16th to endNight
9%425%6%35%6%6%7%41%
1496
June1st to 15thNight
12%425%42436%7%45%
1440
16th to endNight
6%3235%25%46%7%53%
1440
July1st to 15thNight
5%2134245%6%8%54%
1440
16th to endNight
421342446%9%54%
1516
August1st to 15thNight
6%32443445%7%53%
1620
16th to endNight
9%414424435%54%
1794
September1st to 15thNight
7%3145%33347%55%
1800
16th to endNight
12%42442435%6%49%
1877
October1st to 15thNight
15%6%23322246%49%
1980
16th to endNight
19%9%3442334439%
2134
November1st to 15thNight
13%9%36%324445%42%
2404
16th to endNight
15%10%47%6%35%35%7%30%
2520
December1st to 15thNight
13%12%5%9%7%34445%29%
2520
16th to endNight
17%14%7%10%7%34345%22%
2688

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 15thDay
23%8%46%7%45%346%25%
1432
16th to endDay
24%13%5%8%6%24345%20%
1665
February1st to 15thDay
23%9%47%6%3433427%
1575
16th to endDay
23%10%5%8%5%24435%27%
1461
March1st to 15thDay
26%9%36%5%13336%29%
1941
16th to endDay
30%9%25%423346%26%
2132
April1st to 15thDay
30%7%25%42234431%
2151
16th to endDay
36%10%2442333423%
2283
May1st to 15thDay
32%7%25%5%32345%26%
2466
16th to endDay
28%6%25%433346%30%
2617
June1st to 15thDay
31%5%1442345%6%31%
2520
16th to endDay
25%415%5%245%6%7%31%
2520
July1st to 15thDay
23%21342335%7%41%
2520
16th to endDay
23%3134235%5%8%37%
2649
August1st to 15thDay
16%4145%35%5%6%7%38%
2340
16th to endDay
19%41432335%6%44%
2406
September1st to 15thDay
16%41443445%7%43%
2160
16th to endDay
21%42443435%5%40%
1863
October1st to 15thDay
23%6%24312345%41%
1650
16th to endDay
25%8%35%313335%34%
1738
November1st to 15thDay
23%9%36%42334434%
1454
16th to endDay
29%8%26%6%23346%26%
1440
December1st to 15thDay
29%10%47%8%3333320%
1440
16th to endDay
30%15%6%10%5%2212318%
1536
January1st to 15thNight
24%7%36%6%3445%5%28%
2506
16th to endNight
25%11%39%5%23335%24%
2557
February1st to 15thNight
22%10%47%423335%32%
2278
16th to endNight
22%7%35%6%45%345%31%
2012
March1st to 15thNight
25%8%35%323345%34%
2028
16th to endNight
31%7%26%41233432%
2091
April1st to 15thNight
31%6%14422435%33%
1797
16th to endNight
36%7%3442334424%
1674
May1st to 15thNight
33%5%1441333433%
1484
16th to endNight
24%5%15%5%24446%34%
1496
June1st to 15thNight
26%41432435%5%37%
1440
16th to endNight
22%213333346%45%
1440
July1st to 15thNight
21%21332435%7%44%
1440
16th to endNight
20%21332345%7%46%
1516
August1st to 15thNight
15%21342335%7%48%
1620
16th to endNight
16%313423335%51%
1794
September1st to 15thNight
14%314433346%51%
1800
16th to endNight
18%314323445%47%
1877
October1st to 15thNight
22%6%13222245%45%
1980
16th to endNight
26%8%2432333436%
2134
November1st to 15thNight
24%8%25%32333338%
2404
16th to endNight
27%9%25%5%34336%26%
2520
December1st to 15thNight
28%10%48%6%2333424%
2520
16th to endNight
29%12%5%9%6%2233419%
2688

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
9%10%7%7%9%46%447%28%
1432
16th to endDay
9%13%7%11%7%45%45%6%24%
1665
February1st to 15thDay
8%11%6%9%7%45%445%32%
1575
16th to endDay
10%11%6%9%6%26%446%31%
1461
March1st to 15thDay
13%10%47%6%3345%7%32%
1941
16th to endDay
18%10%45%5%34447%31%
2130
April1st to 15thDay
17%8%35%5%23446%37%
2151
16th to endDay
22%12%35%5%35%346%29%
2283
May1st to 15thDay
19%8%36%6%33447%31%
2466
16th to endDay
12%8%35%6%35%45%8%37%
2617
June1st to 15thDay
16%5%334235%6%8%38%
2520
16th to endDay
9%426%5%35%6%7%9%38%
2520
July1st to 15thDay
7%32343446%9%48%
2520
16th to endDay
7%3245%25%5%7%10%45%
2649
August1st to 15thDay
9%425%5%45%5%6%8%41%
2340
16th to endDay
12%42442345%7%47%
2406
September1st to 15thDay
9%5%14435%5%6%8%45%
2160
16th to endDay
15%6%245%335%5%6%41%
1863
October1st to 15thDay
16%6%35%42335%5%44%
1650
16th to endDay
18%10%46%424336%36%
1738
November1st to 15thDay
11%11%5%6%6%3345%5%37%
1454
16th to endDay
15%10%37%6%3446%8%29%
1440
December1st to 15thDay
15%12%6%9%9%4443424%
1440
16th to endDay
17%17%7%12%7%2323321%
1536
January1st to 15thNight
10%9%6%7%7%35%5%5%6%32%
2506
16th to endNight
11%12%6%10%6%34446%28%
2557
February1st to 15thNight
7%11%5%8%6%25%345%38%
2278
16th to endNight
9%8%46%7%46%45%6%36%
2012
March1st to 15thNight
11%10%46%433446%38%
2028
16th to endNight
17%9%46%5%24346%36%
2091
April1st to 15thNight
19%8%34424436%38%
1797
16th to endNight
22%8%45%5%23445%31%
1674
May1st to 15thNight
19%6%25%5%2344440%
1484
16th to endNight
8%5%26%6%25%5%7%8%40%
1496
June1st to 15thNight
11%5%24425%46%8%44%
1440
16th to endNight
6%31343445%7%52%
1440
July1st to 15thNight
5%213435%46%9%54%
1440
16th to endNight
42144235%6%8%55%
1516
August1st to 15thNight
6%31442445%8%52%
1620
16th to endNight
9%5%14424445%54%
1794
September1st to 15thNight
7%32443335%6%56%
1800
16th to endNight
11%4245%2345%6%48%
1877
October1st to 15thNight
15%6%23313346%49%
1980
16th to endNight
19%9%26%413335%38%
2134
November1st to 15thNight
13%8%45%5%2443443%
2404
16th to endNight
14%10%46%6%35%447%30%
2520
December1st to 15thNight
13%12%5%9%7%35%435%28%
2520
16th to endNight
16%14%8%10%7%33345%22%
2688

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
56%5%11%18%7%
1433
16th to endDay
59%5%15%14%3
1665
February1st to 15thDay
53%5%14%18%6%1
1576
16th to endDay
53%6%11%22%5%
1461
March1st to 15thDay
51%5%16%19%6%
1941
16th to endDay
53%5%14%22%3
2132
April1st to 15thDay
47%413%21%11%1
2151
16th to endDay
56%5%12%15%9%
2283
May1st to 15thDay
52%5%13%20%7%
2466
16th to endDay
45%6%12%22%11%1
2621
June1st to 15thDay
41%6%15%27%8%
2520
16th to endDay
37%7%16%26%10%1
2520
July1st to 15thDay
30%5%16%30%15%1
2371
16th to endDay
31%7%17%25%15%1
2482
August1st to 15thDay
36%8%15%28%9%1
2326
16th to endDay
35%5%17%28%13%1
2406
September1st to 15thDay
35%6%15%32%10%
2160
16th to endDay
41%5%14%30%7%
1863
October1st to 15thDay
41%5%12%27%12%
1650
16th to endDay
48%5%14%21%7%
1738
November1st to 15thDay
47%5%12%20%12%1
1454
16th to endDay
52%6%19%14%6%1
1440
December1st to 15thDay
62%414%13%4
1440
16th to endDay
68%310%11%4
1536
January1st to 15thNight
51%5%13%21%7%
2506
16th to endNight
56%416%16%5%
2557
February1st to 15thNight
48%5%14%22%8%
2288
16th to endNight
47%6%12%23%8%
2012
March1st to 15thNight
46%6%14%21%10%
2028
16th to endNight
50%314%23%6%
2091
April1st to 15thNight
46%48%24%14%1
1797
16th to endNight
52%6%9%17%11%2
1674
May1st to 15thNight
46%6%13%19%11%1
1485
16th to endNight
39%7%12%23%15%1
1498
June1st to 15thNight
35%6%14%28%13%1
1440
16th to endNight
28%5%15%30%15%3
1440
July1st to 15thNight
26%6%15%32%16%2
1360
16th to endNight
22%7%16%30%18%4
1420
August1st to 15thNight
28%6%14%30%16%3
1610
16th to endNight
31%5%14%29%15%3
1794
September1st to 15thNight
29%414%33%18%
1800
16th to endNight
36%415%29%14%
1877
October1st to 15thNight
36%312%30%15%2
1980
16th to endNight
47%413%21%11%
2134
November1st to 15thNight
43%411%23%14%
2404
16th to endNight
52%6%15%16%7%1
2520
December1st to 15thNight
57%5%13%17%4
2520
16th to endNight
65%412%13%4
2688

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%8%27%32%7%2
90
16th to endDay
29%5%35%26%31
96
February1st to 15thDay
14%16%42%23%3
90
16th to endDay
18%11%34%30%31
81
March1st to 15thDay
15%7%41%28%6%
90
16th to endDay
28%434%23%9%
116
April1st to 15thDay
22%10%29%26%11%
270
16th to endDay
32%8%29%19%9%1
393
May1st to 15thDay
22%13%27%24%8%2
468
16th to endDay
18%10%27%24%13%5%
517
June1st to 15thDay
16%7%27%30%14%4
495
16th to endDay
10%6%31%30%15%4
495
July1st to 15thDay
9%325%30%20%11%
475
16th to endDay
7%425%31%24%6%
515
August1st to 15thDay
10%321%31%28%4
493
16th to endDay
16%421%31%19%7%
446
September1st to 15thDay
12%226%30%22%6%
315
16th to endDay
19%5%26%29%14%5%
155
October1st to 15thDay
47%34%23%23%6%
90
16th to endDay
27%437%15%15%
96
November1st to 15thDay
8%425%40%17%3
90
16th to endDay
37%7%30%17%6%
90
December1st to 15thDay
23%5%36%27%6%
90
16th to endDay
33%10%35%19%1
96
January1st to 15thNight
14%10%32%31%8%1
900
16th to endNight
18%10%37%28%5%
960
February1st to 15thNight
14%9%36%29%8%1
880
16th to endNight
14%10%35%28%10%
750
March1st to 15thNight
15%8%35%29%9%
588
16th to endNight
19%10%30%25%13%
576
April1st to 15thNight
21%6%33%29%8%
539
16th to endNight
25%8%30%27%7%
540
May1st to 15thNight
22%8%33%28%6%
540
16th to endNight
10%6%30%34%16%1
563
June1st to 15thNight
13%425%44%11%
540
16th to endNight
8%323%48%14%
540
July1st to 15thNight
6%222%41%26%1
510
16th to endNight
6%123%45%22%1
564
August1st to 15thNight
8%216%44%25%1
539
16th to endNight
10%222%38%24%2
573
September1st to 15thNight
9%320%40%21%4
540
16th to endNight
12%7%29%30%17%2
557
October1st to 15thNight
19%7%26%30%13%1
660
16th to endNight
26%7%24%31%9%
704
November1st to 15thNight
18%9%30%30%9%1
828
16th to endNight
19%12%33%24%9%
900
December1st to 15thNight
20%9%36%25%6%
900
16th to endNight
23%10%31%27%7%
960
Page generated at 2017-09-22 06:35:34. Version ac04

Copyright 2017 A. Danko


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