Chariton
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Chariton clear sky chart from 2005-11-05 to 2017-10-06.

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%
16038
19%
47118
11%
15992
45%
15992
27%
30035

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
26%
900
17%
2433
7%
895
34%
895
24%
1646
January16th to endNight
22%
960
17%
2496
5%
960
31%
960
22%
1761
February1st to 15thNight
23%
879
12%
2288
3%
876
28%
876
20%
1685
February16th to endNight
25%
717
21%
1979
6%
717
37%
717
26%
1286
March1st to 15thNight
32%
545
21%
1985
12%
545
44%
545
24%
1198
March16th to endNight
27%
576
11%
2112
8%
576
34%
576
15%
1486
April1st to 15thNight
32%
539
17%
1799
11%
539
42%
539
23%
1129
April16th to endNight
31%
540
19%
1740
13%
540
43%
540
20%
1183
May1st to 15thNight
38%
540
16%
1596
11%
540
45%
540
24%
1063
May16th to endNight
42%
563
20%
1497
9%
561
51%
561
31%
975
June1st to 15thNight
57%
540
16%
1440
8%
540
60%
540
35%
897
June16th to endNight
54%
540
19%
1440
9%
540
58%
540
40%
854
July1st to 15thNight
66%
510
17%
1360
11%
510
67%
510
45%
781
July16th to endNight
71%
564
22%
1563
18%
531
73%
531
44%
840
August1st to 15thNight
74%
539
21%
1610
22%
536
76%
536
39%
892
August16th to endNight
67%
573
24%
1836
26%
573
71%
573
35%
1025
September1st to 15thNight
58%
540
26%
1800
26%
540
64%
540
34%
979
September16th to endNight
52%
577
27%
1987
21%
577
62%
577
34%
1074
October1st to 15thNight
39%
684
25%
2052
17%
684
45%
684
30%
1255
October16th to endNight
32%
704
22%
2112
11%
704
43%
704
29%
1268
November1st to 15thNight
36%
748
26%
2265
12%
748
48%
748
32%
1295
November16th to endNight
27%
900
19%
2520
7%
900
37%
900
25%
1654
December1st to 15thNight
21%
900
14%
2520
5%
900
29%
900
19%
1830
December16th to endNight
20%
960
16%
2688
4%
960
30%
960
17%
1979

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%6%35%5%3445%7%40%
48075
Night
12%6%35%424446%45%
47299
Cloud CoverDay
13%7%35%5%3445%7%40%
48084
Night
11%6%35%424446%45%
47303
TransparencyDay
43%6%13%22%12%1
47773
Night
39%5%13%24%15%2
47119
SeeingDay
14%7%27%30%15%4
6050
Night
14%9%32%30%12%
16039

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
10%9%5%7%6%35%45%7%34%
1504
16th to endDay
15%13%48%6%35%445%28%
1728
February1st to 15thDay
13%8%410%6%34447%31%
1575
16th to endDay
13%8%37%5%3445%5%37%
1499
March1st to 15thDay
14%8%47%6%2435%7%34%
1969
16th to endDay
19%9%46%5%24446%31%
2112
April1st to 15thDay
18%9%35%423446%38%
2148
16th to endDay
23%8%36%424345%32%
2218
May1st to 15thDay
18%7%47%5%345%5%6%32%
2353
16th to endDay
14%5%35%5%35%5%46%39%
2617
June1st to 15thDay
12%6%25%5%25%46%7%41%
2520
16th to endDay
8%313436%5%7%9%44%
2520
July1st to 15thDay
7%4145%345%6%8%48%
2520
16th to endDay
5%224435%5%7%11%48%
2496
August1st to 15thDay
8%4245%35%5%6%9%43%
2340
16th to endDay
13%5%24424448%45%
2365
September1st to 15thDay
14%323323347%51%
2160
16th to endDay
11%3144245%5%7%49%
1957
October1st to 15thDay
14%6%24323246%47%
1706
16th to endDay
15%7%33424446%44%
1760
November1st to 15thDay
9%6%24323447%50%
1592
16th to endDay
17%7%34434448%37%
1440
December1st to 15thDay
14%11%5%9%7%25%337%29%
1440
16th to endDay
15%13%5%10%6%3343428%
1536
January1st to 15thNight
9%7%37%6%35%5%5%7%39%
2433
16th to endNight
10%10%5%7%43445%5%37%
2496
February1st to 15thNight
13%10%49%5%34435%34%
2285
16th to endNight
12%8%46%423347%43%
1979
March1st to 15thNight
13%6%45%42334446%
1973
16th to endNight
18%11%36%434347%31%
2112
April1st to 15thNight
14%7%24434446%44%
1799
16th to endNight
18%8%35%5%23335%39%
1740
May1st to 15thNight
13%6%25%5%35%5%5%6%40%
1596
16th to endNight
9%5%345%246%5%7%45%
1496
June1st to 15thNight
7%4145%345%6%10%47%
1440
16th to endNight
6%214325%5%5%10%51%
1440
July1st to 15thNight
42442446%9%55%
1440
16th to endNight
33133245%6%9%55%
1670
August1st to 15thNight
42145%245%5%8%55%
1620
16th to endNight
8%325%42435%7%54%
1836
September1st to 15thNight
11%313324345%55%
1800
16th to endNight
9%423323447%54%
1987
October1st to 15thNight
15%6%23323345%50%
2052
16th to endNight
13%42442333452%
2112
November1st to 15thNight
9%5%13323446%55%
2265
16th to endNight
15%8%35%423345%44%
2520
December1st to 15thNight
15%12%47%5%24335%35%
2520
16th to endNight
17%11%48%5%34335%32%
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
10%9%5%7%6%35%446%35%
1504
16th to endDay
15%13%5%7%7%35%445%28%
1728
February1st to 15thDay
13%9%5%9%6%44347%31%
1575
16th to endDay
12%9%37%5%45%5%45%38%
1499
March1st to 15thDay
14%8%48%5%2445%6%34%
1980
16th to endDay
19%10%37%5%24446%31%
2110
April1st to 15thDay
17%9%35%424346%37%
2148
16th to endDay
22%8%26%434445%32%
2218
May1st to 15thDay
18%7%47%6%34446%32%
2353
16th to endDay
14%5%26%5%45%5%46%39%
2617
June1st to 15thDay
11%6%25%5%2446%8%41%
2520
16th to endDay
7%3245%35%5%7%9%44%
2520
July1st to 15thDay
7%414435%5%6%8%48%
2520
16th to endDay
5%224425%5%7%10%48%
2496
August1st to 15thDay
8%425%5%35%5%7%10%42%
2340
16th to endDay
12%5%15%42445%7%45%
2365
September1st to 15thDay
13%423323347%51%
2160
16th to endDay
11%3145%2345%8%48%
1957
October1st to 15thDay
14%5%34423346%47%
1706
16th to endDay
15%7%23423445%44%
1760
November1st to 15thDay
9%6%24423447%50%
1592
16th to endDay
17%7%34424447%37%
1440
December1st to 15thDay
14%12%49%6%35%346%29%
1440
16th to endDay
15%13%5%9%6%3433428%
1536
January1st to 15thNight
9%8%37%5%35%5%47%39%
2433
16th to endNight
11%10%5%7%5%34446%37%
2496
February1st to 15thNight
13%10%49%6%34435%34%
2278
16th to endNight
12%8%45%423346%43%
1979
March1st to 15thNight
13%7%35%323335%46%
1985
16th to endNight
19%10%36%5%3435%6%32%
2112
April1st to 15thNight
14%7%23434446%44%
1799
16th to endNight
19%8%345%23435%39%
1740
May1st to 15thNight
13%5%35%435%5%5%7%40%
1595
16th to endNight
9%4345%345%5%6%46%
1496
June1st to 15thNight
7%4145%345%6%9%46%
1440
16th to endNight
6%2233346%6%9%50%
1440
July1st to 15thNight
411432446%10%55%
1440
16th to endNight
33133345%6%10%55%
1670
August1st to 15thNight
3213425%5%6%7%55%
1620
16th to endNight
7%325%42345%7%53%
1836
September1st to 15thNight
11%413324346%54%
1800
16th to endNight
8%423423447%54%
1987
October1st to 15thNight
15%5%24323345%50%
2052
16th to endNight
13%5%15%42333451%
2112
November1st to 15thNight
9%5%13323446%54%
2265
16th to endNight
15%8%35%423335%44%
2520
December1st to 15thNight
15%11%47%434335%35%
2520
16th to endNight
17%11%5%8%5%24335%32%
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
49%412%19%12%
1505
16th to endDay
57%5%14%15%6%
1728
February1st to 15thDay
52%5%15%19%6%
1576
16th to endDay
47%5%13%22%10%1
1499
March1st to 15thDay
49%6%13%21%8%1
1980
16th to endDay
54%6%13%18%6%1
2112
April1st to 15thDay
47%5%11%26%8%
2148
16th to endDay
52%5%13%17%9%1
2218
May1st to 15thDay
52%7%11%20%8%
2353
16th to endDay
44%8%12%23%10%1
2621
June1st to 15thDay
40%7%15%22%12%1
2520
16th to endDay
32%9%15%25%15%2
2520
July1st to 15thDay
32%8%16%26%12%3
2371
16th to endDay
28%7%17%29%16%1
2340
August1st to 15thDay
34%9%15%25%14%
2326
16th to endDay
36%6%12%22%16%4
2365
September1st to 15thDay
33%412%26%19%3
2160
16th to endDay
33%6%12%31%15%1
1957
October1st to 15thDay
38%410%24%19%3
1706
16th to endDay
40%5%12%25%13%2
1760
November1st to 15thDay
33%5%14%24%20%2
1592
16th to endDay
45%5%15%20%11%
1440
December1st to 15thDay
56%415%16%7%
1440
16th to endDay
59%411%15%8%1
1536
January1st to 15thNight
42%5%15%21%14%
2433
16th to endNight
47%417%18%10%
2496
February1st to 15thNight
51%413%20%9%
2288
16th to endNight
41%312%24%14%1
1979
March1st to 15thNight
40%413%24%15%1
1985
16th to endNight
53%5%13%18%7%1
2112
April1st to 15thNight
41%411%25%14%2
1799
16th to endNight
47%5%11%20%12%2
1740
May1st to 15thNight
41%7%15%21%13%
1596
16th to endNight
36%7%13%25%14%3
1498
June1st to 15thNight
31%8%16%25%16%2
1440
16th to endNight
27%7%14%25%21%3
1440
July1st to 15thNight
24%7%19%29%14%5%
1360
16th to endNight
22%7%16%32%19%1
1563
August1st to 15thNight
25%8%16%32%15%2
1610
16th to endNight
29%6%11%26%18%6%
1836
September1st to 15thNight
31%39%27%22%5%
1800
16th to endNight
29%5%11%31%20%2
1987
October1st to 15thNight
37%48%22%22%4
2052
16th to endNight
35%412%25%18%3
2112
November1st to 15thNight
29%6%13%25%20%4
2265
16th to endNight
43%311%27%12%1
2520
December1st to 15thNight
52%5%12%20%8%
2520
16th to endNight
55%411%17%10%1
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
20%10%41%21%5%2
90
16th to endDay
23%13%37%21%3
96
February1st to 15thDay
14%20%36%20%8%
90
16th to endDay
13%14%41%20%7%1
81
March1st to 15thDay
20%14%41%23%1
90
16th to endDay
37%12%30%14%41
96
April1st to 15thDay
21%11%31%25%10%
267
16th to endDay
28%12%28%21%7%1
328
May1st to 15thDay
19%12%33%23%8%1
468
16th to endDay
17%10%31%24%13%2
517
June1st to 15thDay
13%324%34%20%4
495
16th to endDay
7%7%31%32%15%4
495
July1st to 15thDay
9%123%37%19%9%
475
16th to endDay
418%44%27%4
515
August1st to 15thDay
9%118%35%29%5%
493
16th to endDay
14%318%35%20%8%
405
September1st to 15thDay
13%321%28%26%6%
315
16th to endDay
14%5%23%38%13%4
165
October1st to 15thDay
13%11%34%28%47%
107
16th to endDay
12%9%40%31%6%
96
November1st to 15thDay
48%32%33%13%7%
90
16th to endDay
40%16%28%11%21
90
December1st to 15thDay
18%21%33%16%6%3
90
16th to endDay
28%21%33%15%1
96
January1st to 15thNight
11%14%41%23%8%
900
16th to endNight
15%13%40%25%4
960
February1st to 15thNight
18%11%38%26%4
880
16th to endNight
16%11%41%23%5%1
717
March1st to 15thNight
15%10%37%24%11%
545
16th to endNight
23%10%34%26%5%
576
April1st to 15thNight
18%12%35%28%5%
539
16th to endNight
23%8%31%28%7%1
540
May1st to 15thNight
13%8%33%35%7%
540
16th to endNight
11%434%35%12%1
563
June1st to 15thNight
10%323%44%17%
540
16th to endNight
6%231%41%17%
540
July1st to 15thNight
5%120%39%31%1
510
16th to endNight
5%115%48%28%1
564
August1st to 15thNight
4112%47%31%2
539
16th to endNight
9%212%43%29%3
573
September1st to 15thNight
12%320%30%28%4
540
16th to endNight
10%427%31%23%2
577
October1st to 15thNight
17%7%31%29%12%1
684
16th to endNight
16%10%36%26%9%
704
November1st to 15thNight
12%13%35%28%9%
748
16th to endNight
18%12%38%21%7%
900
December1st to 15thNight
21%15%36%22%5%
900
16th to endNight
22%11%36%24%4
960
Page generated at 2017-10-07 13:07:53. Version ac04

Copyright 2017 A. Danko


Chariton Clear Sky Chart | Charts Home