Manic-5
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Manic-5 clear sky chart from 2005-11-06 to 2024-03-06.

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
21%
22919
9%
81202
4%
22807
27%
22807
11%
61810

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%
842
10%
4712
4%
817
26%
817
5%
3621
January11th to 20thNight
17%
830
7%
4685
4%
804
25%
804
5%
3641
January21st to endNight
25%
827
10%
4829
8%
814
35%
814
9%
3110
February1st to 10thNight
20%
760
13%
2650
4%
760
33%
760
12%
1922
February11th to 20thNight
18%
743
10%
2406
3%
740
28%
740
11%
1851
February21st to endNight
23%
628
12%
1910
6%
628
31%
628
13%
1445
March1st to 10thNight
20%
743
13%
2227
5%
743
29%
743
14%
1670
March11th to 20thNight
20%
720
12%
1998
5%
720
27%
720
12%
1557
March21st to endNight
19%
792
14%
2143
4%
792
27%
792
14%
1651
April1st to 10thNight
16%
669
11%
1749
3%
669
22%
669
12%
1406
April11th to 20thNight
22%
534
15%
1598
7%
534
29%
534
16%
1146
April21st to endNight
22%
540
11%
1620
7%
540
28%
540
13%
1232
May1st to 10thNight
24%
485
8%
1534
5%
485
29%
485
13%
1176
May11th to 20thNight
26%
354
11%
1239
5%
354
36%
354
16%
870
May21st to endNight
18%
389
7%
1356
2%
388
24%
388
14%
985
June1st to 10thNight
24%
360
4%
1260
0%
360
26%
360
14%
904
June11th to 20thNight
26%
360
2%
1260
0%
360
26%
360
13%
920
June21st to endNight
28%
360
1%
1260
0%
360
29%
360
13%
936
July1st to 10thNight
33%
350
2%
1225
0%
350
34%
350
16%
855
July11th to 20thNight
38%
348
5%
1218
3%
348
39%
348
17%
839
July21st to endNight
38%
394
6%
1365
7%
372
40%
372
13%
1018
August1st to 10thNight
36%
358
6%
1422
7%
356
40%
356
12%
1061
August11th to 20thNight
31%
523
9%
1587
5%
523
36%
523
14%
1200
August21st to endNight
32%
594
12%
1782
6%
594
36%
594
17%
1294
September1st to 10thNight
26%
623
10%
1743
4%
623
30%
623
18%
1274
September11th to 20thNight
24%
720
10%
1980
4%
720
28%
720
17%
1465
September21st to endNight
25%
720
15%
1980
7%
720
32%
720
18%
1451
October1st to 10thNight
20%
720
13%
2076
6%
720
26%
720
14%
1544
October11th to 20thNight
20%
720
6%
2273
4%
720
23%
720
10%
1831
October21st to endNight
17%
792
7%
2574
5%
792
20%
792
8%
2090
November1st to 10thNight
14%
795
6%
2522
2%
795
18%
795
7%
2093
November11th to 20thNight
15%
850
5%
2698
3%
850
18%
850
7%
2228
November21st to endNight
14%
850
4%
2850
2%
850
16%
850
5%
2448
December1st to 10thNight
17%
850
6%
2850
3%
850
21%
850
8%
2316
December11th to 20thNight
17%
850
8%
3480
4%
849
22%
849
8%
2740
December21st to endNight
18%
926
7%
5141
4%
907
25%
907
4%
4020

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
19%12%5%9%7%45%5%5%5%23%
77943
Night
16%13%5%10%8%46%5%5%6%22%
81602
TransparencyDay
61%5%10%15%8%1
77629
Night
61%5%11%15%7%1
81452
SeeingDay
27%17%29%18%7%2
14876
Night
24%15%31%22%7%1
22947

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
11%13%5%11%11%45%5%6%5%24%
2207
11th to 20thDay
8%17%7%12%10%6%8%6%7%6%14%
2268
21st to endDay
6%9%5%13%7%46%5%6%6%33%
2772
February1st to 10thDay
5%10%6%9%10%6%8%6%7%8%24%
1529
11th to 20thDay
7%17%7%10%10%5%6%7%6%7%19%
1663
21st to endDay
6%13%6%11%11%48%8%6%7%20%
1541
March1st to 10thDay
9%13%7%12%9%46%6%5%424%
1847
11th to 20thDay
11%15%7%11%9%6%6%43424%
1962
21st to endDay
13%18%7%9%7%35%445%25%
2209
April1st to 10thDay
18%17%6%11%7%4443321%
2210
11th to 20thDay
14%13%5%9%7%45%5%5%6%27%
2312
21st to endDay
19%14%5%9%6%44345%26%
2340
May1st to 10thDay
25%13%47%6%3444425%
2443
11th to 20thDay
21%9%47%5%45%6%5%6%28%
2655
21st to endDay
23%11%47%6%35%445%27%
2919
June1st to 10thDay
26%10%47%5%3445%5%28%
2700
11th to 20thDay
21%8%37%6%36%5%5%6%27%
2700
21st to endDay
29%8%37%6%35%5%5%6%23%
2700
July1st to 10thDay
22%9%47%6%46%6%6%6%24%
2700
11th to 20thDay
21%7%38%6%47%6%7%7%25%
2700
21st to endDay
20%8%38%8%5%7%6%7%7%22%
2869
August1st to 10thDay
24%11%47%8%5%6%6%6%6%17%
2498
11th to 20thDay
22%8%37%7%47%7%6%6%24%
2304
21st to endDay
23%10%47%7%45%5%5%6%24%
2574
September1st to 10thDay
22%9%37%7%35%5%46%30%
2215
11th to 20thDay
30%8%36%6%34446%27%
1980
21st to endDay
24%11%47%6%45%445%27%
1980
October1st to 10thDay
23%12%38%6%5%6%35%5%24%
1883
11th to 20thDay
29%17%5%9%6%34445%15%
1684
21st to endDay
27%20%5%9%6%4433415%
1782
November1st to 10thDay
18%19%9%12%8%45%5%4412%
1556
11th to 20thDay
20%18%7%12%10%4443314%
1482
21st to endDay
16%21%9%11%9%45%335%15%
1330
December1st to 10thDay
15%14%7%14%10%5%6%445%16%
1330
11th to 20thDay
16%14%7%11%10%46%445%18%
1668
21st to endDay
11%15%7%12%8%5%7%5%45%20%
2431
January1st to 10thNight
8%16%6%14%10%6%8%6%5%5%16%
4748
11th to 20thNight
10%16%6%13%13%6%7%5%6%6%13%
4696
21st to endNight
6%10%411%8%5%7%7%6%8%27%
4884
February1st to 10thNight
6%10%6%10%11%6%8%7%8%7%22%
2650
11th to 20thNight
8%15%7%12%9%46%6%7%7%18%
2403
21st to endNight
7%13%7%10%8%48%7%6%8%21%
1910
March1st to 10thNight
8%14%7%12%8%47%6%6%6%23%
2217
11th to 20thNight
12%15%6%10%8%46%6%45%23%
1997
21st to endNight
10%17%6%9%8%35%5%5%5%27%
2143
April1st to 10thNight
18%15%5%10%7%45%45%5%23%
1749
11th to 20thNight
15%11%48%7%445%45%33%
1598
21st to endNight
20%11%48%8%45%44428%
1620
May1st to 10thNight
25%12%47%6%35%345%26%
1534
11th to 20thNight
21%9%37%6%3445%7%32%
1238
21st to endNight
21%9%47%6%4445%6%30%
1356
June1st to 10thNight
21%10%37%7%2446%7%29%
1260
11th to 20thNight
21%8%46%7%36%6%6%6%27%
1260
21st to endNight
26%8%45%5%345%6%7%26%
1260
July1st to 10thNight
20%7%36%5%46%6%8%9%25%
1260
11th to 20thNight
17%7%27%6%35%6%6%8%31%
1260
21st to endNight
20%7%27%5%47%8%7%8%26%
1445
August1st to 10thNight
22%8%37%6%45%5%7%7%27%
1432
11th to 20thNight
24%9%25%5%36%5%5%6%28%
1587
21st to endNight
20%9%36%6%345%5%6%31%
1782
September1st to 10thNight
22%8%36%5%345%5%7%32%
1743
11th to 20thNight
25%8%36%5%35%445%32%
1980
21st to endNight
20%9%36%6%35%5%5%6%33%
1980
October1st to 10thNight
20%11%48%6%35%45%5%30%
2076
11th to 20thNight
28%14%49%6%33445%20%
2273
21st to endNight
27%14%6%9%6%35%445%18%
2574
November1st to 10thNight
21%15%6%11%8%46%5%5%5%16%
2522
11th to 20thNight
18%17%7%12%8%45%5%5%5%15%
2698
21st to endNight
19%18%7%13%11%5%5%44411%
2850
December1st to 10thNight
16%15%6%12%11%45%5%5%5%17%
2850
11th to 20thNight
18%14%7%11%8%45%5%5%7%17%
3531
21st to endNight
10%18%7%11%9%46%5%5%7%18%
5236

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
61%410%19%5%
2208
11th to 20thDay
65%412%13%5%
2268
21st to endDay
50%49%16%19%2
2772
February1st to 10thDay
56%5%9%18%13%1
1529
11th to 20thDay
63%410%14%9%
1671
21st to endDay
60%48%18%9%1
1541
March1st to 10thDay
62%39%17%8%1
1850
11th to 20thDay
64%46%14%11%1
1962
21st to endDay
61%48%14%11%2
2209
April1st to 10thDay
69%36%11%10%
2210
11th to 20thDay
58%49%17%11%1
2312
21st to endDay
62%49%15%10%1
2340
May1st to 10thDay
63%5%8%13%9%1
2443
11th to 20thDay
55%6%10%18%10%2
2659
21st to endDay
60%47%18%10%1
2919
June1st to 10thDay
58%5%8%17%10%3
2700
11th to 20thDay
56%7%10%15%12%1
2700
21st to endDay
62%6%9%14%8%1
2700
July1st to 10thDay
58%7%11%14%8%1
2625
11th to 20thDay
54%8%13%16%8%
2619
21st to endDay
59%9%13%16%3
2709
August1st to 10thDay
64%9%13%12%2
2484
11th to 20thDay
57%9%14%15%5%1
2304
21st to endDay
59%6%14%16%4
2574
September1st to 10thDay
55%7%14%18%7%
2215
11th to 20thDay
59%5%14%18%4
1980
21st to endDay
59%5%11%18%6%
1980
October1st to 10thDay
61%6%12%13%7%
1883
11th to 20thDay
71%5%11%9%3
1684
21st to endDay
75%47%9%41
1782
November1st to 10thDay
75%6%9%9%1
1556
11th to 20thDay
75%411%10%1
1482
21st to endDay
73%411%9%2
1330
December1st to 10thDay
71%414%8%2
1330
11th to 20thDay
67%311%14%6%
1668
21st to endDay
64%6%6%16%6%2
2431
January1st to 10thNight
67%410%14%5%
4748
11th to 20thNight
67%5%12%11%5%
4696
21st to endNight
50%7%12%17%13%2
4884
February1st to 10thNight
57%49%16%11%2
2650
11th to 20thNight
62%49%16%8%
2406
21st to endNight
60%311%16%9%1
1910
March1st to 10thNight
60%311%18%8%1
2227
11th to 20thNight
62%48%15%10%1
1998
21st to endNight
57%5%8%17%11%1
2143
April1st to 10thNight
63%5%8%11%12%1
1749
11th to 20thNight
53%5%10%17%14%2
1598
21st to endNight
60%49%15%11%
1620
May1st to 10thNight
60%6%9%15%10%
1534
11th to 20thNight
53%5%13%19%11%
1239
21st to endNight
54%6%8%22%9%
1357
June1st to 10thNight
54%6%10%18%10%1
1260
11th to 20thNight
54%8%11%14%12%1
1260
21st to endNight
56%8%10%16%11%
1260
July1st to 10thNight
48%9%19%18%5%
1225
11th to 20thNight
48%8%15%20%8%
1218
21st to endNight
53%11%15%17%5%
1365
August1st to 10thNight
55%11%18%13%4
1422
11th to 20thNight
56%8%13%18%41
1587
21st to endNight
52%7%17%20%4
1782
September1st to 10thNight
51%8%15%22%5%
1743
11th to 20thNight
54%5%15%19%6%
1980
21st to endNight
52%6%13%24%6%1
1980
October1st to 10thNight
55%6%14%18%7%1
2076
11th to 20thNight
66%5%14%12%4
2273
21st to endNight
69%410%13%31
2574
November1st to 10thNight
69%5%12%10%2
2522
11th to 20thNight
70%5%14%10%1
2698
21st to endNight
76%411%7%2
2850
December1st to 10thNight
69%413%11%3
2850
11th to 20thNight
66%411%14%6%
3532
21st to endNight
64%8%7%12%7%2
5236

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
14%17%37%23%8%1
180
11th to 20thDay
22%14%37%18%7%2
180
21st to endDay
15%22%29%23%9%2
198
February1st to 10thDay
15%20%39%15%8%3
189
11th to 20thDay
14%22%36%22%5%1
366
21st to endDay
21%18%38%16%5%2
368
March1st to 10thDay
19%20%31%21%6%2
440
11th to 20thDay
19%19%36%19%6%1
420
21st to endDay
25%23%31%15%6%1
462
April1st to 10thDay
29%19%34%13%41
420
11th to 20thDay
24%21%30%16%6%3
412
21st to endDay
29%21%28%15%6%2
420
May1st to 10thDay
34%14%24%19%6%2
454
11th to 20thDay
26%18%26%19%9%2
624
21st to endDay
34%20%24%16%5%
680
June1st to 10thDay
32%16%24%21%7%1
630
11th to 20thDay
26%17%28%18%9%1
630
21st to endDay
31%16%25%20%6%2
630
July1st to 10thDay
25%12%28%23%10%2
620
11th to 20thDay
24%14%28%23%9%2
618
21st to endDay
22%10%30%24%10%3
613
August1st to 10thDay
27%11%30%19%9%3
446
11th to 20thDay
24%12%30%23%10%2
439
21st to endDay
26%15%28%16%10%5%
495
September1st to 10thDay
28%19%29%16%5%3
450
11th to 20thDay
37%15%25%12%8%2
450
21st to endDay
28%21%28%15%5%2
450
October1st to 10thDay
27%20%29%14%7%2
401
11th to 20thDay
41%13%24%13%6%4
360
21st to endDay
34%18%24%15%8%1
396
November1st to 10thDay
33%25%27%10%41
365
11th to 20thDay
32%15%30%15%6%2
332
21st to endDay
24%26%36%8%7%
180
December1st to 10thDay
17%16%27%24%11%5%
180
11th to 20thDay
23%25%32%14%41
180
21st to endDay
23%21%34%14%9%
198
January1st to 10thNight
17%15%35%25%8%
850
11th to 20thNight
22%17%32%22%7%
832
21st to endNight
14%14%36%27%8%1
836
February1st to 10thNight
12%17%40%21%9%1
760
11th to 20thNight
18%17%36%22%7%
743
21st to endNight
16%15%35%22%9%3
628
March1st to 10thNight
16%17%35%24%7%1
743
11th to 20thNight
20%18%32%22%7%1
720
21st to endNight
21%19%32%21%6%
792
April1st to 10thNight
28%15%33%18%5%
669
11th to 20thNight
22%19%32%18%8%1
534
21st to endNight
30%13%28%20%9%1
540
May1st to 10thNight
31%10%28%22%7%1
485
11th to 20thNight
25%11%32%23%9%1
354
21st to endNight
25%16%35%21%3
389
June1st to 10thNight
25%14%30%24%7%
360
11th to 20thNight
23%10%34%24%8%1
360
21st to endNight
29%10%28%25%8%1
360
July1st to 10thNight
20%9%33%28%9%1
350
11th to 20thNight
20%10%26%29%14%1
348
21st to endNight
23%9%25%30%12%1
394
August1st to 10thNight
24%7%27%27%15%1
358
11th to 20thNight
28%9%26%25%11%
523
21st to endNight
26%10%27%26%10%2
594
September1st to 10thNight
27%13%30%23%7%
623
11th to 20thNight
31%15%25%21%7%1
720
21st to endNight
27%16%29%21%7%1
720
October1st to 10thNight
28%19%29%18%6%1
720
11th to 20thNight
33%13%24%21%7%2
720
21st to endNight
36%14%25%18%7%
792
November1st to 10thNight
32%19%29%15%5%
795
11th to 20thNight
28%18%29%18%7%1
850
21st to endNight
28%17%30%19%5%
850
December1st to 10thNight
25%14%30%21%8%2
850
11th to 20thNight
22%16%34%21%6%
850
21st to endNight
22%16%31%21%8%2
935
Page generated at 2024-03-03 06:28:58. Version ac07

Copyright © 2024 Attilla Danko.


Manic-5 Clear Sky Chart |Charts Home