Camp Floyd State Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Camp Floyd State Park clear sky chart from 2005-11-05 to 2017-12-20.

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
65%
16098
23%
48293
21%
16062
68%
16062
34%
28335

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
56%
716
13%
2327
15%
716
56%
716
21%
1577
January16th to endNight
57%
768
17%
2496
18%
768
59%
768
21%
1698
February1st to 15thNight
61%
698
14%
2288
16%
698
62%
698
24%
1487
February16th to endNight
57%
632
21%
1895
21%
632
61%
632
28%
1234
March1st to 15thNight
64%
720
21%
2022
19%
720
67%
720
33%
1250
March16th to endNight
59%
768
21%
2112
16%
768
62%
768
33%
1318
April1st to 15thNight
52%
659
19%
1874
13%
659
56%
659
31%
1167
April16th to endNight
58%
540
26%
1620
18%
540
63%
540
35%
944
May1st to 15thNight
61%
539
24%
1619
19%
539
65%
539
38%
907
May16th to endNight
65%
561
19%
1685
18%
561
67%
561
36%
966
June1st to 15thNight
65%
540
22%
1620
19%
540
70%
540
43%
843
June16th to endNight
75%
540
28%
1620
27%
540
80%
540
59%
722
July1st to 15thNight
74%
510
17%
1530
17%
510
76%
510
39%
853
July16th to endNight
79%
564
24%
1593
23%
531
79%
531
44%
849
August1st to 15thNight
77%
539
27%
1611
22%
536
78%
536
44%
844
August16th to endNight
80%
573
37%
1725
31%
573
82%
573
48%
866
September1st to 15thNight
78%
702
30%
1962
24%
702
82%
702
52%
1013
September16th to endNight
77%
716
38%
1980
31%
716
80%
716
54%
1004
October1st to 15thNight
73%
720
30%
2088
24%
720
76%
720
47%
1090
October16th to endNight
71%
768
34%
2310
31%
768
74%
768
43%
1219
November1st to 15thNight
66%
760
26%
2470
26%
760
68%
760
33%
1397
November16th to endNight
67%
787
26%
2542
27%
787
70%
787
34%
1420
December1st to 15thNight
61%
975
14%
2730
12%
975
62%
975
29%
1775
December16th to endNight
49%
803
13%
2574
13%
803
50%
803
16%
1892

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
45%25%5%345%5%7%49%
48538
Night
5%5%25%42445%7%50%
48488
TransparencyDay
31%7%10%19%19%12%
48233
Night
31%6%11%21%18%10%
48294
SeeingDay
7%7%21%31%22%8%
5632
Night
7%314%40%28%4
16111

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 15thDay
6%9%49%9%47%6%7%7%29%
1611
16th to endDay
7%11%46%7%46%5%7%8%30%
1728
February1st to 15thDay
5%9%48%8%5%5%5%6%9%31%
1575
16th to endDay
6%10%46%6%345%6%9%35%
1579
March1st to 15thDay
35%25%5%345%7%9%45%
1937
16th to endDay
6%7%36%6%36%5%6%8%38%
2112
April1st to 15thDay
5%6%26%6%35%5%5%7%44%
2071
16th to endDay
46%35%5%2445%8%49%
2340
May1st to 15thDay
5%4245%25%5%5%8%50%
2331
16th to endDay
6%4245%35%6%6%9%47%
2429
June1st to 15thDay
322342445%7%59%
2340
16th to endDay
21221223475%
2340
July1st to 15thDay
22134235%6%8%58%
2340
16th to endDay
32134245%6%8%56%
2467
August1st to 15thDay
2213335%6%6%8%56%
2340
16th to endDay
221343345%6%62%
2475
September1st to 15thDay
3213323446%64%
1997
16th to endDay
411221235%6%67%
1980
October1st to 15thDay
6%4135%25%45%5%55%
1872
16th to endDay
442442335%8%56%
1911
November1st to 15thDay
6%6%35%5%3445%6%48%
1719
16th to endDay
45%35%6%35%6%6%8%42%
1730
December1st to 15thDay
6%10%47%6%27%5%6%8%34%
1560
16th to endDay
9%13%5%9%7%5%5%5%6%9%24%
1754
January1st to 15thNight
6%9%37%8%35%5%7%9%32%
2327
16th to endNight
8%8%38%7%36%5%6%9%32%
2496
February1st to 15thNight
6%7%37%5%35%5%6%9%38%
2277
16th to endNight
5%8%35%5%36%5%6%7%42%
1895
March1st to 15thNight
45%35%5%35%5%6%7%47%
2022
16th to endNight
5%5%25%5%25%6%7%7%45%
2112
April1st to 15thNight
7%8%25%425%446%49%
1874
16th to endNight
6%414425%46%7%50%
1620
May1st to 15thNight
4425%41445%6%55%
1619
16th to endNight
6%425%42445%7%52%
1684
June1st to 15thNight
3322325%447%61%
1620
16th to endNight
111222445%72%
1620
July1st to 15thNight
3314436%5%7%7%53%
1620
16th to endNight
23143245%6%9%54%
1701
August1st to 15thNight
3213335%6%5%7%57%
1620
16th to endNight
221332445%7%61%
1725
September1st to 15thNight
3213223347%64%
1962
16th to endNight
4213312235%70%
1980
October1st to 15thNight
5%214223446%62%
2088
16th to endNight
33134225%5%7%59%
2310
November1st to 15thNight
6%5%25%32445%6%52%
2470
16th to endNight
44245%245%5%8%51%
2542
December1st to 15thNight
7%7%36%5%35%5%6%8%41%
2730
16th to endNight
9%11%5%9%8%45%46%7%27%
2574

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
50%10%19%15%3
1612
16th to endDay
47%10%15%16%8%1
1728
February1st to 15thDay
48%8%13%17%10%
1575
16th to endDay
41%10%15%21%10%
1579
March1st to 15thDay
33%7%17%25%13%2
1937
16th to endDay
41%8%12%22%10%4
2112
April1st to 15thDay
38%7%11%22%15%4
2071
16th to endDay
32%7%9%23%22%4
2340
May1st to 15thDay
29%7%10%20%25%7%
2331
16th to endDay
30%10%8%20%23%6%
2432
June1st to 15thDay
22%5%6%16%32%15%
2340
16th to endDay
12%339%26%44%
2340
July1st to 15thDay
22%5%6%12%21%32%
2201
16th to endDay
22%7%6%12%20%30%
2312
August1st to 15thDay
21%6%7%16%19%28%
2325
16th to endDay
20%46%15%29%24%
2475
September1st to 15thDay
19%6%6%14%27%26%
1997
16th to endDay
17%5%7%21%30%18%
1980
October1st to 15thDay
28%6%8%23%26%6%
1872
16th to endDay
26%5%10%28%25%3
1911
November1st to 15thDay
35%7%10%24%18%3
1719
16th to endDay
34%10%14%25%12%1
1730
December1st to 15thDay
43%9%18%21%6%
1560
16th to endDay
55%8%14%15%5%
1754
January1st to 15thNight
46%7%20%19%41
2327
16th to endNight
45%7%16%19%9%1
2496
February1st to 15thNight
40%8%17%21%10%
2288
16th to endNight
38%8%12%29%10%
1895
March1st to 15thNight
32%7%15%28%12%2
2022
16th to endNight
32%9%12%26%15%4
2112
April1st to 15thNight
35%6%10%24%18%4
1874
16th to endNight
31%5%11%25%22%3
1620
May1st to 15thNight
27%6%9%22%26%7%
1620
16th to endNight
29%6%11%25%20%6%
1685
June1st to 15thNight
22%6%6%17%30%16%
1620
16th to endNight
12%4310%27%41%
1620
July1st to 15thNight
26%6%7%11%15%32%
1530
16th to endNight
23%6%8%14%17%29%
1593
August1st to 15thNight
22%6%9%17%16%27%
1611
16th to endNight
19%5%5%13%27%26%
1725
September1st to 15thNight
19%47%15%25%27%
1962
16th to endNight
19%3420%29%22%
1980
October1st to 15thNight
21%5%10%26%27%8%
2088
16th to endNight
22%6%8%27%30%4
2310
November1st to 15thNight
31%6%10%26%19%5%
2470
16th to endNight
29%6%13%30%16%2
2542
December1st to 15thNight
38%6%19%24%9%
2730
16th to endNight
54%6%15%17%5%
2574

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
27%410%26%23%7%
90
16th to endDay
12%5%14%30%27%10%
96
February1st to 15thDay
10%310%35%26%14%
90
16th to endDay
8%7%31%33%15%2
238
March1st to 15thDay
7%10%23%35%17%4
270
16th to endDay
13%13%31%26%12%1
288
April1st to 15thDay
10%21%23%20%15%7%
269
16th to endDay
9%19%28%26%13%1
270
May1st to 15thDay
7%13%30%29%13%5%
288
16th to endDay
9%7%21%26%23%10%
330
June1st to 15thDay
411%24%33%17%8%
315
16th to endDay
2425%31%26%9%
315
July1st to 15thDay
2318%35%24%15%
305
16th to endDay
4121%36%32%3
327
August1st to 15thDay
4419%41%22%8%
315
16th to endDay
4215%33%31%12%
332
September1st to 15thDay
5%5%19%35%20%13%
315
16th to endDay
6%417%24%37%8%
315
October1st to 15thDay
5%5%26%27%24%10%
207
16th to endDay
8%417%27%34%7%
144
November1st to 15thDay
9%5%12%30%25%15%
135
16th to endDay
8%5%20%36%23%5%
135
December1st to 15thDay
9%212%51%15%8%
135
16th to endDay
15%19%37%32%2
108
January1st to 15thNight
11%215%37%26%6%
720
16th to endNight
10%413%37%27%7%
768
February1st to 15thNight
9%213%46%21%4
704
16th to endNight
9%319%43%22%1
632
March1st to 15thNight
6%416%47%22%2
720
16th to endNight
6%6%22%44%18%2
768
April1st to 15thNight
10%10%21%36%18%2
659
16th to endNight
8%7%20%40%21%2
540
May1st to 15thNight
5%5%21%38%25%3
540
16th to endNight
7%6%14%35%30%4
563
June1st to 15thNight
47%15%41%29%1
540
16th to endNight
2316%41%33%2
540
July1st to 15thNight
5%10%34%43%4
510
16th to endNight
5%8%35%48%1
564
August1st to 15thNight
419%46%37%1
539
16th to endNight
218%38%44%4
573
September1st to 15thNight
5%28%35%40%8%
702
16th to endNight
5%38%32%38%11%
716
October1st to 15thNight
5%312%41%31%5%
720
16th to endNight
5%313%38%33%5%
768
November1st to 15thNight
7%313%39%29%5%
760
16th to endNight
6%314%45%23%6%
787
December1st to 15thNight
11%214%46%20%3
975
16th to endNight
15%314%43%20%2
803
Page generated at 2017-12-21 05:04:52. Version ac04

Copyright 2017 A. Danko


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