New Ulm
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the New Ulm clear sky chart from 2005-11-06 to 2024-01-14.

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
37%
24824
18%
74366
10%
24764
44%
24764
25%
48287

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
28%
950
14%
2648
6%
946
36%
946
20%
1865
January11th to 20thNight
29%
920
12%
2463
6%
920
34%
920
18%
1853
January21st to endNight
23%
990
13%
2574
4%
990
29%
990
17%
1966
February1st to 10thNight
25%
900
14%
2340
3%
900
32%
900
22%
1688
February11th to 20thNight
26%
878
18%
2274
6%
874
34%
874
25%
1555
February21st to endNight
32%
716
18%
1900
6%
716
41%
716
24%
1317
March1st to 10thNight
30%
540
15%
1980
9%
540
38%
540
20%
1255
March11th to 20thNight
29%
540
18%
1980
11%
540
40%
540
19%
1293
March21st to endNight
31%
594
15%
2178
12%
594
39%
594
16%
1469
April1st to 10thNight
27%
540
16%
1829
10%
540
35%
540
21%
1173
April11th to 20thNight
29%
533
20%
1711
16%
533
40%
533
20%
1160
April21st to endNight
30%
540
20%
1620
11%
540
42%
540
23%
1092
May1st to 10thNight
36%
540
14%
1612
10%
540
42%
540
26%
1040
May11th to 20thNight
38%
531
21%
1417
9%
531
45%
531
31%
908
May21st to endNight
43%
584
16%
1552
6%
582
48%
582
31%
1012
June1st to 10thNight
54%
540
18%
1440
7%
540
57%
540
41%
842
June11th to 20thNight
46%
540
17%
1368
5%
540
51%
540
37%
870
June21st to endNight
56%
540
21%
1260
8%
540
58%
540
49%
742
July1st to 10thNight
67%
525
21%
1272
9%
525
69%
525
53%
728
July11th to 20thNight
65%
522
24%
1392
11%
522
68%
522
52%
744
July21st to endNight
67%
591
24%
1619
17%
558
69%
558
53%
799
August1st to 10thNight
64%
537
22%
1601
18%
534
68%
534
40%
889
August11th to 20thNight
67%
534
26%
1600
26%
534
72%
534
42%
857
August21st to endNight
60%
594
26%
1852
26%
594
69%
594
43%
966
September1st to 10thNight
57%
540
25%
1800
24%
540
64%
540
39%
924
September11th to 20thNight
49%
540
29%
1898
24%
540
62%
540
37%
985
September21st to endNight
41%
561
25%
2001
16%
561
55%
561
31%
1083
October1st to 10thNight
38%
720
23%
2160
14%
720
46%
720
31%
1302
October11th to 20thNight
30%
720
23%
2160
9%
720
42%
720
28%
1342
October21st to endNight
32%
792
21%
2376
11%
792
42%
792
24%
1537
November1st to 10thNight
33%
893
24%
2500
10%
893
44%
893
28%
1552
November11th to 20thNight
27%
950
19%
2660
7%
950
37%
950
22%
1843
November21st to endNight
28%
950
18%
2660
9%
950
36%
950
25%
1752
December1st to 10thNight
29%
950
11%
2660
5%
950
35%
950
21%
1901
December11th to 20thNight
25%
949
12%
3209
5%
949
33%
949
15%
2266
December21st to endNight
19%
1040
8%
4800
5%
1026
27%
1026
8%
3717

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%6%35%5%5%7%39%
75056
Night
12%8%37%5%3445%7%41%
74707
TransparencyDay
46%314%25%11%1
74762
Night
44%313%25%13%2
74522
SeeingDay
17%8%29%28%14%3
14803
Night
16%8%31%33%11%1
24831

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
9%13%49%9%5%6%6%5%7%27%
1517
11th to 20thDay
10%15%6%11%8%36%5%6%7%22%
1572
21st to endDay
9%14%6%12%9%5%6%6%5%6%22%
1782
February1st to 10thDay
8%11%5%9%9%5%8%6%5%8%26%
1620
11th to 20thDay
9%12%49%9%5%6%7%6%5%30%
1574
21st to endDay
13%11%5%8%8%345%6%8%30%
1369
March1st to 10thDay
15%12%5%8%6%35%446%31%
1980
11th to 20thDay
15%8%48%6%35%46%8%33%
1980
21st to endDay
20%10%5%7%6%45%5%47%28%
2178
April1st to 10thDay
19%9%45%5%2446%7%34%
2130
11th to 20thDay
19%11%46%6%3445%5%33%
2196
21st to endDay
24%9%45%5%3445%5%31%
2340
May1st to 10thDay
19%7%26%5%46%5%6%6%33%
2346
11th to 20thDay
18%6%35%5%345%5%7%39%
2479
21st to endDay
17%5%36%5%35%46%8%37%
2725
June1st to 10thDay
12%5%24435%46%9%46%
2520
11th to 20thDay
14%5%26%5%35%46%8%42%
2583
21st to endDay
9%426%5%35%6%6%9%46%
2700
July1st to 10thDay
7%3135%25%5%6%10%53%
2642
11th to 20thDay
7%4243345%6%8%55%
2520
21st to endDay
6%324435%5%6%10%53%
2601
August1st to 10thDay
10%5%25%6%46%6%7%8%42%
2328
11th to 20thDay
12%5%25%6%345%5%8%45%
2301
21st to endDay
9%3245%25%46%7%54%
2503
September1st to 10thDay
13%5%245%3445%7%49%
2160
11th to 20thDay
12%6%235%3445%7%49%
2057
21st to endDay
14%6%26%43335%7%46%
1940
October1st to 10thDay
16%7%35%5%3445%7%43%
1800
11th to 20thDay
15%8%45%434346%45%
1800
21st to endDay
18%7%46%433446%41%
1980
November1st to 10thDay
12%8%36%5%3445%8%42%
1572
11th to 20thDay
11%10%6%9%7%345%46%35%
1520
21st to endDay
14%8%37%5%3447%9%36%
1520
December1st to 10thDay
11%12%48%9%5%6%45%6%29%
1520
11th to 20thDay
11%13%6%10%7%4446%6%29%
1918
21st to endDay
20%12%6%15%6%34446%20%
2783
January1st to 10thNight
8%8%5%10%8%5%6%6%6%7%32%
2648
11th to 20thNight
9%12%6%10%8%45%6%5%7%27%
2463
21st to endNight
12%13%5%10%8%45%5%6%6%27%
2574
February1st to 10thNight
9%11%48%9%46%446%35%
2340
11th to 20thNight
9%9%47%5%45%6%6%7%38%
2273
21st to endNight
12%8%37%6%46%5%5%8%36%
1900
March1st to 10thNight
12%10%37%6%345%48%39%
1980
11th to 20thNight
15%9%36%6%36%445%39%
1980
21st to endNight
19%10%46%43445%7%34%
2178
April1st to 10thNight
14%10%36%43445%7%39%
1829
11th to 20thNight
20%9%37%5%34445%36%
1711
21st to endNight
19%7%35%5%345%5%5%38%
1620
May1st to 10thNight
15%8%35%4245%5%7%41%
1612
11th to 20thNight
16%6%2342436%8%46%
1416
21st to endNight
14%6%25%6%2445%8%43%
1551
June1st to 10thNight
9%325%3345%6%7%53%
1440
11th to 20thNight
10%335%6%35%5%5%6%48%
1368
21st to endNight
7%32442345%8%58%
1260
July1st to 10thNight
34234345%410%59%
1309
11th to 20thNight
4322335%45%8%62%
1440
21st to endNight
42233245%5%10%60%
1714
August1st to 10thNight
7%3145%26%5%7%8%51%
1611
11th to 20thNight
9%42342345%8%57%
1600
21st to endNight
7%424424447%60%
1852
September1st to 10thNight
10%314423347%58%
1800
11th to 20thNight
11%42342346%8%54%
1898
21st to endNight
11%5%25%42445%6%53%
2001
October1st to 10thNight
14%6%245%34346%50%
2160
11th to 20thNight
16%7%25%5%23446%45%
2160
21st to endNight
15%10%36%5%3345%5%42%
2376
November1st to 10thNight
12%6%35%5%25%45%7%46%
2500
11th to 20thNight
12%10%48%6%35%445%39%
2660
21st to endNight
12%8%37%6%24447%41%
2660
December1st to 10thNight
10%10%5%9%8%45%5%5%7%34%
2660
11th to 20thNight
12%10%5%10%7%45%5%6%7%30%
3279
21st to endNight
22%12%5%12%7%35%445%21%
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
57%413%19%7%
1518
11th to 20thDay
62%212%15%8%
1572
21st to endDay
64%214%13%7%1
1782
February1st to 10thDay
57%212%20%8%1
1620
11th to 20thDay
55%412%20%8%1
1583
21st to endDay
54%414%17%11%
1369
March1st to 10thDay
55%314%21%7%1
1980
11th to 20thDay
52%313%25%7%
1980
21st to endDay
58%312%21%5%1
2178
April1st to 10thDay
50%213%25%9%1
2130
11th to 20thDay
55%210%21%11%1
2196
21st to endDay
56%210%22%8%1
2340
May1st to 10thDay
52%312%23%10%1
2346
11th to 20thDay
46%313%25%12%1
2483
21st to endDay
47%312%24%12%2
2725
June1st to 10thDay
36%315%30%14%1
2520
11th to 20thDay
41%313%25%16%1
2583
21st to endDay
36%317%29%14%2
2700
July1st to 10thDay
27%317%36%15%1
2571
11th to 20thDay
28%314%31%20%4
2445
21st to endDay
28%316%34%16%3
2456
August1st to 10thDay
39%316%29%10%3
2314
11th to 20thDay
39%315%31%12%1
2301
21st to endDay
30%413%33%17%2
2503
September1st to 10thDay
36%311%32%18%
2160
11th to 20thDay
36%215%33%12%1
2057
21st to endDay
39%212%34%12%1
1940
October1st to 10thDay
43%210%30%14%1
1800
11th to 20thDay
43%112%28%14%2
1800
21st to endDay
46%213%26%13%1
1980
November1st to 10thDay
42%214%23%15%3
1572
11th to 20thDay
52%313%21%11%
1520
21st to endDay
45%320%23%8%1
1520
December1st to 10thDay
56%315%16%9%1
1520
11th to 20thDay
56%220%17%4
1915
21st to endDay
69%111%14%5%1
2783
January1st to 10thNight
51%313%24%9%
2648
11th to 20thNight
57%315%18%7%1
2463
21st to endNight
59%213%17%8%1
2574
February1st to 10thNight
53%212%22%10%1
2340
11th to 20thNight
46%313%23%13%2
2274
21st to endNight
47%311%24%12%2
1900
March1st to 10thNight
46%317%25%7%1
1980
11th to 20thNight
50%211%23%14%1
1980
21st to endNight
52%312%24%7%2
2178
April1st to 10thNight
46%313%25%13%1
1829
11th to 20thNight
51%17%20%17%3
1711
21st to endNight
48%28%24%15%2
1620
May1st to 10thNight
43%415%23%15%1
1612
11th to 20thNight
38%412%27%15%3
1417
21st to endNight
41%313%24%16%3
1552
June1st to 10thNight
30%315%31%18%2
1440
11th to 20thNight
36%414%23%19%3
1368
21st to endNight
26%316%32%20%3
1260
July1st to 10thNight
23%313%37%21%3
1272
11th to 20thNight
21%416%32%22%5%
1392
21st to endNight
21%215%38%20%4
1619
August1st to 10thNight
31%215%32%17%4
1601
11th to 20thNight
28%317%33%18%2
1600
21st to endNight
26%313%33%21%4
1852
September1st to 10thNight
28%212%34%22%1
1800
11th to 20thNight
30%215%34%18%1
1898
21st to endNight
34%212%33%18%1
2001
October1st to 10thNight
38%29%30%18%3
2160
11th to 20thNight
41%212%27%17%2
2160
21st to endNight
45%213%25%14%1
2376
November1st to 10thNight
40%214%26%16%3
2500
11th to 20thNight
49%312%22%12%1
2660
21st to endNight
45%317%25%10%1
2660
December1st to 10thNight
52%317%21%8%
2660
11th to 20thNight
55%216%20%6%1
3281
21st to endNight
68%19%17%5%
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
15%13%34%25%11%2
270
11th to 20thDay
20%8%36%29%6%
249
21st to endDay
14%10%38%28%8%1
264
February1st to 10thDay
14%15%45%21%5%
240
11th to 20thDay
18%14%36%28%5%
240
21st to endDay
23%11%37%27%3
198
March1st to 10thDay
18%15%41%22%4
240
11th to 20thDay
23%7%38%25%7%1
240
21st to endDay
32%9%27%20%8%3
264
April1st to 10thDay
28%11%31%24%5%
390
11th to 20thDay
28%11%26%26%8%1
474
21st to endDay
28%13%27%22%9%2
600
May1st to 10thDay
24%8%34%22%10%1
603
11th to 20thDay
21%11%28%24%12%3
625
21st to endDay
18%6%28%32%14%2
679
June1st to 10thDay
11%7%24%33%20%6%
630
11th to 20thDay
15%6%32%31%13%3
630
21st to endDay
10%7%31%32%16%4
630
July1st to 10thDay
8%420%32%27%9%
621
11th to 20thDay
9%5%24%34%22%6%
618
21st to endDay
8%322%40%21%6%
684
August1st to 10thDay
12%218%34%27%7%
626
11th to 20thDay
14%417%30%29%6%
615
21st to endDay
10%424%34%22%6%
622
September1st to 10thDay
18%5%24%31%18%4
450
11th to 20thDay
12%431%30%18%6%
347
21st to endDay
16%13%30%25%12%5%
270
October1st to 10thDay
20%11%29%23%12%4
270
11th to 20thDay
17%18%37%20%6%1
270
21st to endDay
26%12%37%16%7%1
297
November1st to 10thDay
22%10%32%24%9%2
270
11th to 20thDay
17%17%40%19%7%
270
21st to endDay
21%15%36%22%6%
270
December1st to 10thDay
14%11%44%25%6%
270
11th to 20thDay
19%10%41%25%4
270
21st to endDay
26%15%33%23%3
297
January1st to 10thNight
12%11%38%29%9%1
950
11th to 20thNight
18%9%33%32%7%1
920
21st to endNight
19%11%34%29%7%
990
February1st to 10thNight
16%11%37%29%6%1
900
11th to 20thNight
15%13%37%27%7%1
879
21st to endNight
15%10%34%31%10%1
716
March1st to 10thNight
16%10%37%27%9%1
540
11th to 20thNight
21%7%36%27%9%
540
21st to endNight
25%8%28%29%9%2
594
April1st to 10thNight
19%10%39%27%5%
540
11th to 20thNight
26%10%29%27%8%1
533
21st to endNight
23%8%33%27%8%1
540
May1st to 10thNight
20%8%32%31%9%1
540
11th to 20thNight
21%6%31%30%11%1
531
21st to endNight
18%427%37%13%1
584
June1st to 10thNight
11%327%42%15%1
540
11th to 20thNight
12%232%42%11%
540
21st to endNight
8%426%47%15%1
540
July1st to 10thNight
4420%42%27%3
525
11th to 20thNight
4224%46%22%1
522
21st to endNight
5%121%50%22%2
591
August1st to 10thNight
9%118%46%25%2
537
11th to 20thNight
10%215%43%26%4
534
21st to endNight
8%223%44%22%3
594
September1st to 10thNight
12%322%42%19%2
540
11th to 20thNight
13%330%33%19%2
540
21st to endNight
13%7%33%33%12%1
561
October1st to 10thNight
17%7%32%29%13%1
720
11th to 20thNight
20%9%35%27%8%1
720
21st to endNight
22%11%30%30%8%
792
November1st to 10thNight
17%10%34%30%9%1
893
11th to 20thNight
18%10%38%26%7%
950
21st to endNight
18%11%36%27%8%
950
December1st to 10thNight
17%10%34%31%8%1
950
11th to 20thNight
22%6%35%29%8%1
950
21st to endNight
25%10%32%27%6%
1045
Page generated at 2024-01-11 12:31:59. Version ac07

Copyright 2024 Attilla Danko


New Ulm Clear Sky Chart |Charts Home