Lincolnshire
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Lincolnshire clear sky chart from 2005-11-06 to 2024-03-18.

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
35%
24897
16%
80855
10%
24791
42%
24791
20%
55300

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
18%
944
11%
4388
3%
926
28%
926
10%
3165
January11th to 20thNight
18%
949
10%
4390
4%
930
24%
930
8%
3478
January21st to endNight
16%
1039
7%
4795
3%
1023
23%
1023
8%
3803
February1st to 10thNight
19%
908
13%
2428
3%
908
26%
908
18%
1799
February11th to 20thNight
21%
740
18%
2219
7%
740
31%
740
18%
1519
February21st to endNight
18%
628
18%
1884
5%
628
30%
628
16%
1327
March1st to 10thNight
24%
760
13%
2280
6%
760
29%
760
17%
1619
March11th to 20thNight
29%
748
19%
2221
8%
748
39%
748
24%
1439
March21st to endNight
30%
594
14%
1980
10%
594
37%
594
16%
1414
April1st to 10thNight
28%
540
15%
1800
9%
540
37%
540
18%
1215
April11th to 20thNight
31%
533
19%
1775
12%
533
40%
533
19%
1189
April21st to endNight
35%
540
16%
1686
9%
540
43%
540
21%
1146
May1st to 10thNight
36%
540
14%
1620
9%
540
40%
540
20%
1145
May11th to 20thNight
43%
531
18%
1471
9%
531
50%
531
26%
979
May21st to endNight
46%
582
16%
1552
9%
582
51%
582
28%
1043
June1st to 10thNight
56%
540
16%
1440
10%
540
60%
540
35%
894
June11th to 20thNight
51%
540
20%
1440
12%
540
56%
540
34%
899
June21st to endNight
51%
540
17%
1440
10%
540
55%
540
32%
944
July1st to 10thNight
69%
525
17%
1400
13%
525
70%
525
40%
843
July11th to 20thNight
60%
522
21%
1392
15%
522
64%
522
38%
837
July21st to endNight
66%
591
21%
1487
16%
558
69%
558
42%
882
August1st to 10thNight
71%
537
21%
1470
18%
534
73%
534
39%
865
August11th to 20thNight
68%
534
22%
1737
22%
534
71%
534
34%
966
August21st to endNight
63%
594
22%
1980
23%
594
68%
594
37%
1072
September1st to 10thNight
57%
540
24%
1800
23%
540
62%
540
30%
1043
September11th to 20thNight
58%
643
33%
1903
26%
643
65%
643
38%
1089
September21st to endNight
46%
720
24%
1980
15%
720
52%
720
31%
1260
October1st to 10thNight
49%
720
23%
2016
17%
720
53%
720
31%
1261
October11th to 20thNight
30%
720
20%
2184
9%
720
41%
720
23%
1418
October21st to endNight
27%
792
16%
2574
10%
792
36%
792
18%
1765
November1st to 10thNight
30%
740
24%
2406
15%
740
44%
740
24%
1468
November11th to 20thNight
23%
760
18%
2470
8%
760
34%
760
16%
1657
November21st to endNight
22%
822
18%
2532
7%
822
33%
822
18%
1721
December1st to 10thNight
19%
950
12%
2660
4%
950
27%
950
16%
1944
December11th to 20thNight
20%
950
14%
3216
4%
948
29%
948
14%
2313
December21st to endNight
12%
1041
6%
4839
2%
1026
21%
1026
6%
3879

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%47%6%35%5%6%7%36%
78550
Night
15%10%47%5%3445%6%37%
81283
TransparencyDay
47%6%12%21%12%2
78251
Night
47%6%12%21%12%2
81103
SeeingDay
17%12%30%25%12%4
14844
Night
18%11%30%28%12%1
24919

By Month

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 10thDay
14%12%8%9%8%435%45%29%
2527
11th to 20thDay
13%14%7%12%6%348%9%6%19%
2530
21st to endDay
19%23%7%9%5%23336%21%
2819
February1st to 10thDay
13%13%6%8%7%45%5%5%7%27%
1752
11th to 20thDay
13%11%5%7%5%35%5%5%5%35%
1848
21st to endDay
13%11%5%10%6%35%46%6%31%
1570
March1st to 10thDay
14%12%6%8%6%445%5%6%31%
1900
11th to 20thDay
12%8%37%7%45%5%5%8%37%
1919
21st to endDay
19%10%5%9%7%45%5%6%6%25%
2376
April1st to 10thDay
17%10%5%7%6%35%46%6%31%
2160
11th to 20thDay
16%9%36%5%45%5%5%7%35%
2134
21st to endDay
19%8%46%6%35%447%33%
2272
May1st to 10thDay
16%8%46%6%36%5%5%8%32%
2340
11th to 20thDay
17%8%36%6%345%7%7%34%
2420
21st to endDay
12%7%36%6%46%5%6%8%38%
2725
June1st to 10thDay
9%5%35%5%35%5%6%8%46%
2520
11th to 20thDay
11%425%5%345%6%9%45%
2520
21st to endDay
10%6%36%5%45%5%8%9%39%
2520
July1st to 10thDay
7%424436%6%7%9%47%
2520
11th to 20thDay
8%4245%345%7%9%49%
2520
21st to endDay
7%435%6%35%6%7%9%46%
2743
August1st to 10thDay
7%5%25%5%45%6%7%10%44%
2458
11th to 20thDay
9%5%25%6%446%6%9%44%
2159
21st to endDay
7%4245%45%5%7%9%47%
2376
September1st to 10thDay
13%5%25%435%5%5%8%45%
2160
11th to 20thDay
12%5%233345%6%8%51%
2039
21st to endDay
11%5%36%5%36%5%7%8%42%
1980
October1st to 10thDay
13%7%36%5%3445%6%44%
1940
11th to 20thDay
19%8%36%6%445%6%7%33%
1774
21st to endDay
21%8%36%5%3445%6%35%
1782
November1st to 10thDay
12%7%37%5%3345%7%44%
1672
11th to 20thDay
15%11%5%7%5%445%48%33%
1710
21st to endDay
18%10%47%435%435%37%
1644
December1st to 10thDay
15%13%5%8%6%35%46%7%27%
1520
11th to 20thDay
12%12%6%9%6%35%5%6%7%29%
1918
21st to endDay
19%21%8%12%7%35%33415%
2783
January1st to 10thNight
14%13%8%9%7%34345%30%
4428
11th to 20thNight
16%16%6%12%7%346%7%5%19%
4440
21st to endNight
22%18%8%8%5%3333422%
4843
February1st to 10thNight
15%13%5%7%7%43446%32%
2428
11th to 20thNight
13%9%48%6%36%45%5%37%
2218
21st to endNight
19%9%47%6%33445%36%
1884
March1st to 10thNight
16%10%48%6%34446%34%
2280
11th to 20thNight
12%8%35%5%35%5%6%8%41%
2221
21st to endNight
20%9%47%6%34446%32%
1980
April1st to 10thNight
17%8%35%6%46%447%37%
1800
11th to 20thNight
19%9%36%5%35%445%37%
1775
21st to endNight
20%7%36%5%245%45%39%
1686
May1st to 10thNight
15%8%46%6%35%5%7%8%32%
1620
11th to 20thNight
16%7%35%5%245%5%8%40%
1470
21st to endNight
12%7%37%5%35%45%7%42%
1551
June1st to 10thNight
10%415%5%445%6%8%47%
1440
11th to 20thNight
11%5%245%45%5%6%8%45%
1440
21st to endNight
9%6%26%5%35%5%7%9%42%
1440
July1st to 10thNight
7%314436%6%7%10%50%
1440
11th to 20thNight
8%4244245%7%8%52%
1440
21st to endNight
7%324435%6%7%9%50%
1575
August1st to 10thNight
5%314446%6%8%8%51%
1479
11th to 20thNight
7%3245%35%5%5%9%52%
1737
21st to endNight
7%415%5%3446%8%52%
1980
September1st to 10thNight
11%6%25%5%3435%7%50%
1800
11th to 20thNight
10%424424447%54%
1903
21st to endNight
12%6%26%5%3445%7%46%
1980
October1st to 10thNight
14%6%24434447%49%
2016
11th to 20thNight
16%8%36%433346%43%
2184
21st to endNight
21%8%36%5%23446%37%
2574
November1st to 10thNight
12%7%36%5%34445%48%
2406
11th to 20thNight
14%10%47%6%44447%36%
2470
21st to endNight
17%8%45%6%35%45%6%38%
2532
December1st to 10thNight
17%11%47%7%346%6%7%29%
2660
11th to 20thNight
14%13%5%8%5%3446%7%31%
3279
21st to endNight
22%17%6%9%7%34446%18%
4884

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
60%5%12%18%6%
2528
11th to 20thDay
60%7%13%14%6%
2530
21st to endDay
68%37%17%5%
2819
February1st to 10thDay
56%5%12%15%10%1
1752
11th to 20thDay
50%5%10%23%10%2
1858
21st to endDay
54%6%10%19%10%2
1570
March1st to 10thDay
54%5%12%19%8%2
1900
11th to 20thDay
47%7%12%22%10%2
1919
21st to endDay
59%6%12%17%6%1
2376
April1st to 10thDay
53%6%10%18%11%
2160
11th to 20thDay
49%6%10%20%12%4
2134
21st to endDay
50%8%12%17%12%2
2272
May1st to 10thDay
50%7%13%22%8%
2340
11th to 20thDay
48%7%11%22%11%1
2424
21st to endDay
44%8%13%20%15%2
2725
June1st to 10thDay
36%8%13%24%18%2
2520
11th to 20thDay
35%8%12%22%20%3
2520
21st to endDay
40%8%14%22%13%2
2520
July1st to 10thDay
30%9%15%28%14%4
2451
11th to 20thDay
33%8%14%26%17%2
2445
21st to endDay
33%8%16%25%15%3
2591
August1st to 10thDay
33%8%17%28%11%2
2443
11th to 20thDay
37%8%14%25%15%1
2159
21st to endDay
31%8%15%25%19%3
2376
September1st to 10thDay
37%7%13%22%18%3
2160
11th to 20thDay
31%7%12%31%16%3
2039
21st to endDay
39%6%12%26%17%1
1980
October1st to 10thDay
40%7%11%26%15%1
1940
11th to 20thDay
50%5%11%20%13%1
1774
21st to endDay
50%5%11%22%10%2
1782
November1st to 10thDay
41%5%13%23%17%2
1672
11th to 20thDay
51%5%13%22%9%1
1710
21st to endDay
52%5%11%24%8%
1644
December1st to 10thDay
55%5%16%17%7%1
1520
11th to 20thDay
53%6%15%18%7%1
1915
21st to endDay
74%48%10%3
2783
January1st to 10thNight
58%411%18%8%1
4428
11th to 20thNight
66%5%10%13%6%
4440
21st to endNight
66%5%9%14%5%
4843
February1st to 10thNight
54%5%11%17%12%2
2428
11th to 20thNight
49%412%20%13%1
2219
21st to endNight
51%5%10%20%10%4
1884
March1st to 10thNight
51%6%12%21%8%2
2280
11th to 20thNight
42%6%13%21%16%3
2221
21st to endNight
53%6%12%19%9%1
1980
April1st to 10thNight
47%6%11%21%13%1
1800
11th to 20thNight
47%5%8%19%16%4
1775
21st to endNight
46%6%11%21%14%2
1686
May1st to 10thNight
48%8%10%23%12%
1620
11th to 20thNight
41%6%12%23%15%2
1471
21st to endNight
41%7%12%21%17%2
1552
June1st to 10thNight
32%8%13%26%19%3
1440
11th to 20thNight
35%6%10%25%22%2
1440
21st to endNight
36%8%16%22%16%2
1440
July1st to 10thNight
27%9%16%27%16%5%
1400
11th to 20thNight
27%9%14%29%18%4
1392
21st to endNight
26%8%17%26%19%5%
1487
August1st to 10thNight
26%9%18%29%15%2
1470
11th to 20thNight
28%8%16%29%18%1
1737
21st to endNight
28%6%13%29%19%5%
1980
September1st to 10thNight
34%6%10%26%22%2
1800
11th to 20thNight
30%5%9%32%23%2
1903
21st to endNight
36%6%10%30%16%2
1980
October1st to 10thNight
36%6%10%27%19%2
2016
11th to 20thNight
42%6%11%22%18%2
2184
21st to endNight
48%6%11%23%11%1
2574
November1st to 10thNight
38%5%9%27%17%3
2406
11th to 20thNight
48%5%12%23%11%1
2470
21st to endNight
48%5%14%23%10%
2532
December1st to 10thNight
52%7%13%20%8%1
2660
11th to 20thNight
53%6%13%19%9%1
3281
21st to endNight
68%5%10%12%4
4884

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
20%18%36%22%31
270
11th to 20thDay
24%20%33%20%21
270
21st to endDay
26%18%34%16%6%
297
February1st to 10thDay
21%21%38%17%3
270
11th to 20thDay
24%21%38%14%3
270
21st to endDay
22%23%41%10%31
225
March1st to 10thDay
20%26%39%14%2
270
11th to 20thDay
26%15%38%15%6%
292
21st to endDay
27%15%31%19%7%2
462
April1st to 10thDay
24%15%33%23%5%
420
11th to 20thDay
21%21%27%20%8%2
412
21st to endDay
23%17%29%20%10%1
420
May1st to 10thDay
23%12%33%22%8%2
423
11th to 20thDay
23%9%33%24%9%2
566
21st to endDay
15%9%31%25%15%6%
679
June1st to 10thDay
10%8%33%31%14%3
630
11th to 20thDay
13%7%29%33%13%4
630
21st to endDay
13%7%31%33%12%4
630
July1st to 10thDay
7%325%31%22%11%
621
11th to 20thDay
11%5%28%33%16%7%
618
21st to endDay
6%6%28%36%19%5%
684
August1st to 10thDay
9%420%36%23%8%
577
11th to 20thDay
11%5%19%32%23%10%
439
21st to endDay
8%426%31%23%9%
495
September1st to 10thDay
15%7%22%30%20%5%
450
11th to 20thDay
10%7%19%32%21%11%
450
21st to endDay
13%14%26%24%17%7%
450
October1st to 10thDay
18%10%28%27%13%5%
410
11th to 20thDay
25%19%32%19%5%
270
21st to endDay
32%14%35%13%5%
297
November1st to 10thDay
17%16%34%22%9%1
270
11th to 20thDay
24%21%33%15%6%
270
21st to endDay
26%12%41%19%2
270
December1st to 10thDay
18%23%36%17%5%1
270
11th to 20thDay
17%20%39%19%4
270
21st to endDay
27%22%37%13%2
297
January1st to 10thNight
19%17%40%21%3
950
11th to 20thNight
21%19%35%20%41
950
21st to endNight
22%13%37%24%4
1045
February1st to 10thNight
22%13%37%22%5%
908
11th to 20thNight
20%15%37%24%3
743
21st to endNight
24%17%36%20%3
628
March1st to 10thNight
22%13%35%23%7%
760
11th to 20thNight
16%10%40%26%8%1
748
21st to endNight
23%12%30%26%10%1
594
April1st to 10thNight
20%14%34%26%6%1
540
11th to 20thNight
23%11%30%25%9%1
533
21st to endNight
23%9%28%30%9%1
540
May1st to 10thNight
17%9%32%31%10%1
540
11th to 20thNight
20%6%27%31%16%1
531
21st to endNight
14%5%24%35%21%2
584
June1st to 10thNight
11%323%43%19%1
540
11th to 20thNight
13%6%24%40%16%1
540
21st to endNight
11%427%36%21%2
540
July1st to 10thNight
7%216%40%30%5%
525
11th to 20thNight
9%420%39%25%4
522
21st to endNight
6%219%45%27%1
591
August1st to 10thNight
6%114%45%29%4
537
11th to 20thNight
7%413%38%33%5%
534
21st to endNight
8%319%37%30%3
594
September1st to 10thNight
12%420%33%25%5%
540
11th to 20thNight
12%421%31%27%5%
643
21st to endNight
13%8%27%27%21%4
720
October1st to 10thNight
16%7%24%32%19%3
720
11th to 20thNight
21%14%31%25%9%
720
21st to endNight
25%14%30%23%7%1
792
November1st to 10thNight
17%13%36%23%9%1
740
11th to 20thNight
20%20%32%22%5%1
760
21st to endNight
21%15%37%21%6%
822
December1st to 10thNight
22%16%35%21%5%
950
11th to 20thNight
23%14%35%24%3
950
21st to endNight
29%15%36%18%2
1045
Page generated at 2024-03-15 13:01:39. Version ac07

Copyright © 2024 Attilla Danko.


Lincolnshire Clear Sky Chart |Charts Home