Lincoln City
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Lincoln City 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
38%
22675
11%
74378
10%
22627
40%
22627
14%
56070

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
19%
760
6%
2646
5%
756
22%
756
6%
2284
January11th to 20thNight
28%
744
8%
2564
7%
744
31%
744
9%
2089
January21st to endNight
32%
792
13%
2574
11%
792
35%
792
12%
2015
February1st to 10thNight
25%
720
6%
2340
5%
720
26%
720
7%
1988
February11th to 20thNight
28%
700
8%
2274
5%
700
32%
700
9%
1853
February21st to endNight
25%
592
9%
1899
6%
592
29%
592
8%
1576
March1st to 10thNight
28%
720
7%
1999
6%
720
29%
720
9%
1685
March11th to 20thNight
29%
720
9%
1980
7%
720
31%
720
10%
1664
March21st to endNight
25%
792
5%
2178
4%
792
25%
792
7%
1912
April1st to 10thNight
27%
720
7%
1805
4%
720
28%
720
10%
1552
April11th to 20thNight
32%
655
10%
1723
6%
655
33%
655
13%
1405
April21st to endNight
36%
540
8%
1620
6%
540
37%
540
11%
1281
May1st to 10thNight
39%
482
10%
1562
10%
482
41%
482
16%
1120
May11th to 20thNight
40%
354
8%
1416
11%
354
42%
354
11%
1040
May21st to endNight
38%
389
6%
1552
9%
388
39%
388
10%
1156
June1st to 10thNight
42%
360
7%
1440
12%
360
43%
360
13%
1027
June11th to 20thNight
45%
360
6%
1337
10%
360
45%
360
13%
984
June21st to endNight
53%
360
13%
1260
17%
360
56%
360
24%
782
July1st to 10thNight
60%
350
12%
1252
18%
350
61%
350
26%
742
July11th to 20thNight
62%
348
18%
1392
28%
348
65%
348
30%
721
July21st to endNight
68%
470
20%
1560
26%
444
70%
444
43%
737
August1st to 10thNight
64%
537
16%
1602
16%
534
64%
534
35%
908
August11th to 20thNight
70%
534
23%
1602
21%
534
70%
534
41%
856
August21st to endNight
59%
674
23%
1862
17%
674
60%
674
33%
1147
September1st to 10thNight
65%
720
24%
1800
14%
720
66%
720
44%
1083
September11th to 20thNight
54%
720
20%
1870
13%
720
55%
720
28%
1291
September21st to endNight
56%
720
21%
2020
19%
720
57%
720
30%
1317
October1st to 10thNight
48%
720
13%
2160
13%
720
50%
720
23%
1465
October11th to 20thNight
49%
720
17%
2160
20%
720
50%
720
21%
1514
October21st to endNight
35%
792
16%
2376
12%
792
40%
792
16%
1754
November1st to 10thNight
32%
740
9%
2523
11%
740
33%
740
9%
2061
November11th to 20thNight
28%
760
7%
2660
7%
760
30%
760
8%
2190
November21st to endNight
32%
760
7%
2660
7%
760
34%
760
11%
2067
December1st to 10thNight
31%
760
9%
2660
8%
760
33%
760
10%
2076
December11th to 20thNight
25%
759
7%
3216
6%
759
27%
759
6%
2696
December21st to endNight
16%
831
4%
4834
5%
817
19%
817
3%
4032

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
25%10%36%5%3445%7%29%
75161
Night
28%11%36%5%24445%28%
74649
TransparencyDay
54%8%12%15%9%2
74865
Night
57%7%10%13%9%3
74466
SeeingDay
26%8%20%28%14%2
14052
Night
32%7%14%24%19%3
22685

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
47%14%45%5%2223313%
1519
11th to 20thDay
39%10%34423345%23%
1520
21st to endDay
33%11%36%424346%25%
1782
February1st to 10thDay
39%14%35%5%23345%17%
1620
11th to 20thDay
33%13%5%7%6%35%33320%
1575
21st to endDay
35%15%5%6%433435%17%
1355
March1st to 10thDay
35%14%5%7%5%24445%14%
1957
11th to 20thDay
36%13%5%7%5%33345%17%
1980
21st to endDay
37%15%47%5%34345%14%
2178
April1st to 10thDay
34%14%47%5%3445%6%14%
2153
11th to 20thDay
31%12%48%5%3335%5%21%
2180
21st to endDay
28%11%46%5%36%6%5%6%21%
2340
May1st to 10thDay
22%11%5%7%5%3445%6%30%
2398
11th to 20thDay
26%10%46%5%35%5%5%8%23%
2477
21st to endDay
26%9%47%6%45%5%5%8%21%
2723
June1st to 10thDay
28%10%36%5%3445%6%27%
2520
11th to 20thDay
23%10%47%6%35%5%6%8%24%
2616
21st to endDay
14%7%36%435%45%9%40%
2700
July1st to 10thDay
9%8%344245%6%11%44%
2665
11th to 20thDay
13%6%25%42346%10%47%
2520
21st to endDay
6%42443345%10%54%
2662
August1st to 10thDay
9%7%25%5%345%6%9%44%
2328
11th to 20thDay
9%5%244345%6%9%50%
2298
21st to endDay
9%7%35%5%3346%10%45%
2494
September1st to 10thDay
8%6%24324449%53%
2160
11th to 20thDay
14%7%25%5%45%46%10%39%
2088
21st to endDay
21%7%24423447%41%
1939
October1st to 10thDay
23%7%35%424346%37%
1800
11th to 20thDay
25%9%36%5%33346%32%
1800
21st to endDay
32%9%24423446%30%
1980
November1st to 10thDay
36%11%46%5%435%4418%
1552
11th to 20thDay
38%9%36%43345%421%
1520
21st to endDay
32%12%46%5%4433423%
1520
December1st to 10thDay
31%11%36%6%3333427%
1520
11th to 20thDay
39%12%36%5%3444417%
1928
21st to endDay
41%15%5%6%5%3333414%
2794
January1st to 10thNight
43%12%36%5%3333414%
2646
11th to 20thNight
39%10%36%5%3344420%
2564
21st to endNight
31%13%35%5%23335%25%
2574
February1st to 10thNight
36%15%46%5%3434416%
2340
11th to 20thNight
32%15%37%42333423%
2272
21st to endNight
35%15%47%43333320%
1899
March1st to 10thNight
34%15%37%5%2333420%
1999
11th to 20thNight
36%11%36%5%2434420%
1980
21st to endNight
37%15%47%6%2244415%
2178
April1st to 10thNight
35%15%48%5%3323418%
1805
11th to 20thNight
28%14%46%5%3445%6%20%
1723
21st to endNight
29%12%46%42445%6%23%
1620
May1st to 10thNight
21%14%45%5%24446%31%
1562
11th to 20thNight
29%12%36%4325%6%7%23%
1416
21st to endNight
25%13%37%5%45%46%8%21%
1552
June1st to 10thNight
24%9%47%7%2435%7%28%
1440
11th to 20thNight
23%10%46%7%36%5%5%7%24%
1337
21st to endNight
16%13%35%43335%6%39%
1260
July1st to 10thNight
9%12%45%4345%5%8%41%
1288
11th to 20thNight
12%7%34435%447%48%
1440
21st to endNight
48%36%6%245%5%7%50%
1652
August1st to 10thNight
8%8%26%4346%7%10%41%
1611
11th to 20thNight
7%7%2442346%8%52%
1602
21st to endNight
11%9%35%43445%8%44%
1862
September1st to 10thNight
11%7%2342235%6%55%
1800
11th to 20thNight
16%8%36%6%23445%43%
1870
21st to endNight
17%8%25%32445%6%44%
2020
October1st to 10thNight
22%8%26%423445%39%
2160
11th to 20thNight
25%8%25%42335%7%36%
2160
21st to endNight
28%10%26%5%2344432%
2376
November1st to 10thNight
36%9%37%5%34445%20%
2523
11th to 20thNight
40%8%36%5%2334421%
2660
21st to endNight
31%10%36%5%35%33426%
2660
December1st to 10thNight
32%11%35%43444425%
2660
11th to 20thNight
37%11%36%5%3435%5%19%
3276
21st to endNight
38%16%47%5%2233318%
4862

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
79%45%6%42
1519
11th to 20thDay
66%48%8%7%7%
1520
21st to endDay
63%6%6%12%10%2
1782
February1st to 10thDay
73%6%8%8%41
1620
11th to 20thDay
70%9%5%9%6%2
1584
21st to endDay
72%7%6%8%6%2
1355
March1st to 10thDay
73%8%8%8%4
1957
11th to 20thDay
71%6%7%10%5%1
1980
21st to endDay
75%9%7%8%1
2178
April1st to 10thDay
72%9%8%8%3
2153
11th to 20thDay
66%8%8%10%42
2183
21st to endDay
64%9%9%11%5%1
2340
May1st to 10thDay
54%8%15%15%7%1
2398
11th to 20thDay
59%9%14%12%6%1
2480
21st to endDay
59%12%15%13%2
2724
June1st to 10thDay
57%9%15%13%5%
2520
11th to 20thDay
56%13%15%12%4
2616
21st to endDay
39%8%21%21%8%3
2700
July1st to 10thDay
31%9%18%21%16%4
2592
11th to 20thDay
29%6%15%28%16%5%
2445
21st to endDay
19%5%18%33%22%3
2514
August1st to 10thDay
31%7%21%26%12%3
2312
11th to 20thDay
25%9%21%25%16%4
2298
21st to endDay
32%8%17%26%15%3
2494
September1st to 10thDay
27%7%14%27%15%9%
2160
11th to 20thDay
40%9%15%18%11%6%
2088
21st to endDay
44%8%11%20%12%5%
1939
October1st to 10thDay
49%6%9%16%17%2
1800
11th to 20thDay
53%6%11%15%12%2
1800
21st to endDay
57%6%9%13%12%2
1980
November1st to 10thDay
70%7%6%12%41
1552
11th to 20thDay
67%7%7%8%7%4
1520
21st to endDay
66%7%5%8%10%5%
1520
December1st to 10thDay
63%5%9%9%11%2
1520
11th to 20thDay
71%6%11%7%5%
1928
21st to endDay
74%8%7%7%21
2794
January1st to 10thNight
75%5%6%5%5%4
2646
11th to 20thNight
69%5%7%8%6%6%
2564
21st to endNight
65%47%10%11%3
2574
February1st to 10thNight
72%6%7%9%42
2340
11th to 20thNight
66%8%9%9%7%2
2274
21st to endNight
69%6%8%8%7%2
1899
March1st to 10thNight
69%7%7%12%5%
1999
11th to 20thNight
68%6%8%10%6%1
1980
21st to endNight
73%8%8%10%2
2178
April1st to 10thNight
70%6%9%9%5%
1805
11th to 20thNight
63%8%10%11%5%3
1723
21st to endNight
61%8%10%12%6%2
1620
May1st to 10thNight
53%7%14%17%7%2
1562
11th to 20thNight
57%8%14%13%5%3
1416
21st to endNight
55%11%17%13%4
1552
June1st to 10thNight
53%9%15%19%41
1440
11th to 20thNight
51%12%18%15%3
1337
21st to endNight
39%8%20%21%8%4
1260
July1st to 10thNight
34%10%16%20%14%6%
1252
11th to 20thNight
28%8%15%23%21%5%
1392
21st to endNight
19%8%17%29%20%7%
1560
August1st to 10thNight
28%8%21%25%12%5%
1602
11th to 20thNight
25%6%19%27%15%8%
1602
21st to endNight
32%9%13%26%16%4
1862
September1st to 10thNight
27%7%13%26%17%11%
1800
11th to 20thNight
43%7%12%18%13%8%
1870
21st to endNight
39%7%13%18%15%8%
2020
October1st to 10thNight
45%7%10%18%16%4
2160
11th to 20thNight
48%7%10%16%16%3
2160
21st to endNight
55%6%9%13%13%4
2376
November1st to 10thNight
66%8%8%11%6%1
2523
11th to 20thNight
68%7%8%6%7%4
2660
21st to endNight
62%6%7%8%10%7%
2660
December1st to 10thNight
63%7%9%9%10%3
2660
11th to 20thNight
68%9%7%8%7%1
3276
21st to endNight
71%9%8%9%31
4862

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
49%14%17%11%8%1
180
11th to 20thDay
43%13%14%17%12%
208
21st to endDay
40%9%14%22%13%1
374
February1st to 10thDay
49%7%14%23%7%1
340
11th to 20thDay
41%12%23%17%8%
335
21st to endDay
38%16%23%17%5%
291
March1st to 10thDay
38%15%19%20%7%1
420
11th to 20thDay
37%9%21%23%8%1
420
21st to endDay
40%15%20%17%7%1
462
April1st to 10thDay
38%12%20%20%9%1
420
11th to 20thDay
37%13%20%19%8%2
412
21st to endDay
31%12%24%24%7%2
420
May1st to 10thDay
24%12%24%29%10%2
423
11th to 20thDay
34%9%20%23%12%3
448
21st to endDay
23%9%22%30%13%3
485
June1st to 10thDay
27%424%28%15%2
450
11th to 20thDay
22%8%32%29%9%1
546
21st to endDay
13%324%42%17%1
630
July1st to 10thDay
12%321%45%17%2
587
11th to 20thDay
11%323%40%20%3
444
21st to endDay
5%316%48%24%4
487
August1st to 10thDay
11%215%41%23%7%
447
11th to 20thDay
5%311%42%32%7%
437
21st to endDay
10%324%38%22%3
495
September1st to 10thDay
10%424%35%22%4
450
11th to 20thDay
17%420%34%20%5%
450
21st to endDay
20%10%22%31%15%3
450
October1st to 10thDay
25%8%20%27%18%2
450
11th to 20thDay
28%9%16%26%18%4
450
21st to endDay
36%10%20%20%12%3
495
November1st to 10thDay
36%14%23%15%11%
228
11th to 20thDay
36%11%18%18%14%3
180
21st to endDay
34%12%19%22%14%
180
December1st to 10thDay
39%12%18%16%12%3
180
11th to 20thDay
47%13%17%16%6%1
180
21st to endDay
40%18%16%18%6%2
198
January1st to 10thNight
50%11%13%15%10%1
760
11th to 20thNight
44%8%14%19%13%2
744
21st to endNight
38%7%15%24%15%2
792
February1st to 10thNight
42%8%16%23%10%2
720
11th to 20thNight
37%11%16%20%14%2
704
21st to endNight
43%11%14%19%11%1
592
March1st to 10thNight
43%9%13%22%12%2
720
11th to 20thNight
41%9%13%24%13%1
720
21st to endNight
44%9%14%18%12%2
792
April1st to 10thNight
41%10%13%20%14%2
720
11th to 20thNight
35%10%15%22%15%2
655
21st to endNight
35%8%14%28%14%1
540
May1st to 10thNight
29%9%15%28%16%3
482
11th to 20thNight
34%313%21%27%3
354
21st to endNight
30%7%13%25%22%3
389
June1st to 10thNight
27%315%28%26%2
360
11th to 20thNight
23%7%16%30%21%3
360
21st to endNight
20%213%34%28%3
360
July1st to 10thNight
13%113%34%35%4
350
11th to 20thNight
14%214%40%27%4
348
21st to endNight
8%110%32%41%7%
470
August1st to 10thNight
13%29%27%39%10%
537
11th to 20thNight
10%19%26%43%10%
534
21st to endNight
12%416%32%31%5%
674
September1st to 10thNight
12%314%29%36%6%
720
11th to 20thNight
17%314%24%32%11%
720
21st to endNight
20%5%11%34%25%5%
720
October1st to 10thNight
25%416%26%23%6%
720
11th to 20thNight
26%5%12%28%22%7%
720
21st to endNight
32%8%17%21%18%4
792
November1st to 10thNight
37%9%15%24%14%1
740
11th to 20thNight
44%8%13%22%12%1
760
21st to endNight
32%9%20%23%14%2
760
December1st to 10thNight
35%9%19%20%15%2
760
11th to 20thNight
45%11%14%19%9%1
760
21st to endNight
49%14%16%15%6%1
836
Page generated at 2024-01-13 16:28:28. Version ac07

Copyright 2024 Attilla Danko


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