Fruitland
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Fruitland clear sky chart from 2005-11-06 to 2024-01-27.

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
44%
24345
23%
74766
16%
24290
52%
24290
28%
46316

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
26%
950
21%
2648
8%
946
37%
946
25%
1740
January11th to 20thNight
21%
950
21%
2537
7%
950
30%
950
21%
1792
January21st to endNight
25%
1025
22%
2665
8%
1025
34%
1025
26%
1813
February1st to 10thNight
21%
828
18%
2268
6%
828
30%
828
20%
1624
February11th to 20thNight
22%
703
20%
2099
8%
700
32%
700
22%
1370
February21st to endNight
23%
592
20%
1776
7%
592
32%
592
21%
1186
March1st to 10thNight
26%
720
20%
2160
9%
720
35%
720
24%
1398
March11th to 20thNight
30%
581
18%
2021
11%
581
38%
581
20%
1311
March21st to endNight
32%
594
16%
2030
11%
594
40%
594
19%
1376
April1st to 10thNight
35%
540
25%
1800
14%
540
50%
540
29%
1032
April11th to 20thNight
39%
533
23%
1775
18%
533
51%
533
27%
1087
April21st to endNight
36%
540
19%
1800
12%
540
46%
540
23%
1166
May1st to 10thNight
45%
540
18%
1736
13%
540
53%
540
27%
1080
May11th to 20thNight
48%
531
19%
1563
16%
531
52%
531
27%
1032
May21st to endNight
59%
584
20%
1551
15%
582
61%
582
32%
1014
June1st to 10thNight
63%
540
21%
1440
16%
540
65%
540
36%
880
June11th to 20thNight
74%
540
28%
1440
23%
540
76%
540
48%
807
June21st to endNight
75%
540
26%
1440
20%
540
77%
540
48%
780
July1st to 10thNight
75%
525
20%
1400
17%
525
76%
525
41%
832
July11th to 20thNight
75%
522
23%
1392
21%
522
76%
522
42%
816
July21st to endNight
73%
591
25%
1603
23%
558
75%
558
42%
901
August1st to 10thNight
77%
537
21%
1695
24%
534
78%
534
37%
926
August11th to 20thNight
72%
534
26%
1776
32%
534
75%
534
37%
973
August21st to endNight
77%
594
27%
1980
32%
594
78%
594
38%
1063
September1st to 10thNight
67%
540
27%
1800
29%
540
70%
540
33%
1020
September11th to 20thNight
69%
584
32%
1844
30%
584
72%
584
36%
1041
September21st to endNight
63%
720
30%
1980
22%
720
67%
720
40%
1137
October1st to 10thNight
62%
720
31%
2088
24%
720
67%
720
44%
1116
October11th to 20thNight
44%
720
31%
2160
20%
720
55%
720
35%
1237
October21st to endNight
40%
792
26%
2412
18%
792
50%
792
27%
1493
November1st to 10thNight
47%
740
30%
2406
23%
740
58%
740
37%
1270
November11th to 20thNight
38%
760
29%
2470
19%
760
52%
760
31%
1412
November21st to endNight
36%
760
24%
2470
17%
760
46%
760
25%
1518
December1st to 10thNight
31%
891
20%
2601
11%
891
40%
891
25%
1681
December11th to 20thNight
34%
948
22%
3144
12%
948
41%
948
21%
2016
December21st to endNight
23%
1036
13%
4796
7%
1026
35%
1026
13%
3376

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%35%5%5%8%43%
74883
Night
14%6%35%5%3445%7%46%
75179
TransparencyDay
39%5%12%24%16%3
74592
Night
38%5%11%24%18%4
74992
SeeingDay
14%8%22%27%20%9%
14397
Night
17%8%25%32%17%2
24356

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
19%9%46%433346%39%
1517
11th to 20thDay
19%8%46%5%3445%6%37%
1638
21st to endDay
15%10%36%5%34446%40%
1836
February1st to 10thDay
17%11%36%435%446%38%
1691
11th to 20thDay
17%9%36%5%34446%38%
1748
21st to endDay
17%11%35%5%34447%36%
1480
March1st to 10thDay
17%7%35%435%445%43%
1800
11th to 20thDay
19%10%45%5%3445%5%35%
1952
21st to endDay
21%9%46%5%345%46%33%
2326
April1st to 10thDay
12%6%35%4245%7%7%46%
2160
11th to 20thDay
17%7%36%5%34347%41%
2134
21st to endDay
17%7%36%43445%7%39%
2160
May1st to 10thDay
17%5%35%5%45%5%5%8%38%
2222
11th to 20thDay
15%6%25%43446%8%41%
2327
21st to endDay
9%6%36%6%47%7%6%10%35%
2725
June1st to 10thDay
9%425%5%35%6%6%9%46%
2520
11th to 20thDay
5%325%5%45%6%6%9%51%
2520
21st to endDay
5%3245%35%6%7%11%48%
2520
July1st to 10thDay
9%4245%46%6%7%11%41%
2520
11th to 20thDay
5%3245%35%6%8%11%48%
2520
21st to endDay
6%425%5%45%6%8%10%45%
2617
August1st to 10thDay
7%5%25%6%45%6%7%11%43%
2230
11th to 20thDay
10%5%25%6%45%5%7%10%41%
2125
21st to endDay
8%5%245%35%6%6%10%48%
2376
September1st to 10thDay
10%5%25%6%3446%8%47%
2160
11th to 20thDay
8%5%25%5%35%6%5%7%49%
2098
21st to endDay
10%42432345%8%54%
1980
October1st to 10thDay
8%423423447%58%
1869
11th to 20thDay
14%5%245%2335%5%51%
1800
21st to endDay
19%6%25%423346%46%
1942
November1st to 10thDay
10%5%24423446%54%
1672
11th to 20thDay
13%7%35%5%24436%47%
1710
21st to endDay
18%9%25%423445%43%
1710
December1st to 10thDay
16%9%25%5%24448%41%
1577
11th to 20thDay
16%8%36%6%445%5%6%38%
1918
21st to endDay
20%14%36%5%34446%31%
2783
January1st to 10thNight
17%8%35%5%2445%6%42%
2648
11th to 20thNight
19%9%46%5%34345%37%
2537
21st to endNight
16%7%36%5%3435%6%40%
2665
February1st to 10thNight
19%10%5%6%5%34435%36%
2268
11th to 20thNight
17%7%37%5%33436%42%
2098
21st to endNight
20%8%35%5%34446%38%
1776
March1st to 10thNight
18%7%35%43345%6%43%
2160
11th to 20thNight
19%7%36%42445%5%41%
2021
21st to endNight
20%7%36%6%3445%6%36%
2030
April1st to 10thNight
11%5%24345%46%7%49%
1800
11th to 20thNight
15%5%245%35%5%6%7%44%
1775
21st to endNight
19%7%35%43445%6%40%
1800
May1st to 10thNight
16%6%245%34447%45%
1736
11th to 20thNight
14%6%37%5%3445%7%43%
1562
21st to endNight
8%426%7%46%48%9%41%
1551
June1st to 10thNight
9%5%245%35%5%6%9%47%
1440
11th to 20thNight
4224425%5%5%9%57%
1440
21st to endNight
4212327%6%8%11%53%
1440
July1st to 10thNight
6%324435%6%6%11%51%
1440
11th to 20thNight
5%3245%35%5%6%9%53%
1440
21st to endNight
5%4244246%6%10%51%
1697
August1st to 10thNight
6%4145%35%6%6%10%51%
1705
11th to 20thNight
7%4244345%5%9%53%
1776
21st to endNight
5%3245%345%6%9%53%
1980
September1st to 10thNight
9%6%25%43445%6%53%
1800
11th to 20thNight
8%425%5%3445%7%53%
1844
21st to endNight
9%424434347%56%
1980
October1st to 10thNight
7%423433346%61%
2088
11th to 20thNight
13%5%34423346%54%
2160
21st to endNight
18%7%25%423335%48%
2412
November1st to 10thNight
11%5%2432235%6%58%
2406
11th to 20thNight
13%6%24424346%52%
2470
21st to endNight
19%6%36%42333448%
2470
December1st to 10thNight
18%8%35%42445%8%40%
2601
11th to 20thNight
17%7%35%5%34445%43%
3279
21st to endNight
17%12%47%6%44445%32%
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
48%310%23%13%3
1518
11th to 20thDay
48%410%25%11%1
1638
21st to endDay
46%311%25%12%2
1836
February1st to 10thDay
49%312%21%13%1
1691
11th to 20thDay
48%411%20%13%4
1758
21st to endDay
49%49%21%11%5%
1480
March1st to 10thDay
44%47%25%16%4
1800
11th to 20thDay
52%411%18%12%3
1952
21st to endDay
52%5%12%20%10%1
2326
April1st to 10thDay
35%5%11%28%18%1
2160
11th to 20thDay
45%311%21%16%4
2134
21st to endDay
45%5%11%24%14%1
2160
May1st to 10thDay
44%7%13%25%11%1
2222
11th to 20thDay
41%6%14%22%15%2
2331
21st to endDay
42%8%16%21%12%1
2725
June1st to 10thDay
32%7%15%25%19%1
2520
11th to 20thDay
29%6%12%29%21%3
2520
21st to endDay
27%8%16%26%18%5%
2520
July1st to 10thDay
34%9%14%24%15%5%
2451
11th to 20thDay
27%8%15%28%17%4
2445
21st to endDay
32%8%14%31%13%1
2472
August1st to 10thDay
33%9%14%27%15%1
2216
11th to 20thDay
36%7%14%28%14%1
2125
21st to endDay
31%6%15%25%18%5%
2376
September1st to 10thDay
35%6%10%27%18%4
2160
11th to 20thDay
33%6%10%24%26%2
2098
21st to endDay
29%48%28%27%3
1980
October1st to 10thDay
27%5%10%27%27%5%
1869
11th to 20thDay
35%47%26%21%7%
1800
21st to endDay
41%46%26%18%4
1942
November1st to 10thDay
32%5%9%27%21%6%
1672
11th to 20thDay
39%47%23%22%5%
1710
21st to endDay
44%47%24%19%2
1710
December1st to 10thDay
43%410%26%15%2
1577
11th to 20thDay
47%48%24%15%2
1915
21st to endDay
56%411%16%11%2
2783
January1st to 10thNight
43%410%25%16%2
2648
11th to 20thNight
49%49%24%13%1
2537
21st to endNight
44%311%25%14%2
2665
February1st to 10thNight
51%38%22%13%2
2268
11th to 20thNight
45%39%22%17%3
2099
21st to endNight
47%410%20%15%4
1776
March1st to 10thNight
43%410%19%18%6%
2160
11th to 20thNight
45%5%12%20%14%3
2021
21st to endNight
49%5%11%23%11%1
2030
April1st to 10thNight
34%5%11%27%19%4
1800
11th to 20thNight
38%5%10%23%20%4
1775
21st to endNight
44%5%8%25%15%3
1800
May1st to 10thNight
39%5%13%25%16%2
1736
11th to 20thNight
42%6%12%21%18%2
1563
21st to endNight
37%7%15%22%16%3
1552
June1st to 10thNight
32%7%13%25%20%2
1440
11th to 20thNight
23%6%13%29%24%6%
1440
21st to endNight
21%7%17%29%17%8%
1440
July1st to 10thNight
27%8%18%28%15%5%
1400
11th to 20thNight
28%6%14%29%17%6%
1392
21st to endNight
26%7%17%32%17%1
1603
August1st to 10thNight
27%8%17%31%16%2
1695
11th to 20thNight
28%6%13%28%22%3
1776
21st to endNight
28%6%14%28%20%6%
1980
September1st to 10thNight
32%6%7%30%19%6%
1800
11th to 20thNight
30%6%9%26%25%4
1844
21st to endNight
29%5%9%22%29%6%
1980
October1st to 10thNight
26%310%26%30%6%
2088
11th to 20thNight
32%47%24%26%7%
2160
21st to endNight
40%47%24%19%6%
2412
November1st to 10thNight
29%310%27%25%6%
2406
11th to 20thNight
35%37%25%23%7%
2470
21st to endNight
42%37%24%22%2
2470
December1st to 10thNight
43%412%23%15%2
2601
11th to 20thNight
44%49%24%18%2
3281
21st to endNight
53%6%8%19%13%2
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
27%11%30%24%7%
270
11th to 20thDay
25%15%40%17%21
270
21st to endDay
20%17%38%21%3
282
February1st to 10thDay
26%13%43%13%5%
240
11th to 20thDay
24%21%35%16%4
240
21st to endDay
30%15%34%17%41
198
March1st to 10thDay
18%17%37%20%8%
240
11th to 20thDay
27%17%33%18%42
240
21st to endDay
25%14%31%23%7%
412
April1st to 10thDay
13%14%37%26%10%1
420
11th to 20thDay
21%16%28%21%14%1
412
21st to endDay
20%12%28%28%10%2
420
May1st to 10thDay
17%13%30%26%12%3
423
11th to 20thDay
18%6%25%26%17%8%
473
21st to endDay
11%5%22%33%20%8%
679
June1st to 10thDay
11%417%24%28%16%
630
11th to 20thDay
6%117%37%27%12%
630
21st to endDay
6%321%37%23%11%
630
July1st to 10thDay
10%210%26%28%24%
621
11th to 20thDay
6%212%32%33%16%
618
21st to endDay
7%212%31%33%15%
684
August1st to 10thDay
10%27%31%35%16%
528
11th to 20thDay
15%212%25%32%14%
439
21st to endDay
10%26%25%37%20%
495
September1st to 10thDay
10%410%28%34%16%
450
11th to 20thDay
7%38%28%37%18%
450
21st to endDay
12%7%15%27%27%12%
450
October1st to 10thDay
10%419%38%19%9%
339
11th to 20thDay
17%11%33%25%13%2
270
21st to endDay
25%13%28%25%9%
297
November1st to 10thDay
13%10%28%30%14%4
270
11th to 20thDay
11%17%31%24%14%2
270
21st to endDay
24%11%29%24%11%1
270
December1st to 10thDay
16%13%33%24%11%3
270
11th to 20thDay
23%13%31%23%10%
270
21st to endDay
24%15%39%16%5%
297
January1st to 10thNight
22%13%34%26%5%
950
11th to 20thNight
24%14%37%21%3
950
21st to endNight
21%11%38%28%2
1025
February1st to 10thNight
24%15%35%23%2
828
11th to 20thNight
22%16%35%25%3
703
21st to endNight
25%13%36%24%2
592
March1st to 10thNight
23%13%33%27%4
720
11th to 20thNight
21%11%33%30%6%
581
21st to endNight
24%9%30%30%8%
594
April1st to 10thNight
13%11%37%31%7%
540
11th to 20thNight
17%10%29%31%12%1
533
21st to endNight
22%6%31%30%10%1
540
May1st to 10thNight
16%5%27%38%12%2
540
11th to 20thNight
15%5%22%37%19%2
531
21st to endNight
9%317%43%24%4
584
June1st to 10thNight
12%313%36%33%3
540
11th to 20thNight
4211%50%31%2
540
21st to endNight
4214%44%34%2
540
July1st to 10thNight
8%27%33%41%9%
525
11th to 20thNight
6%38%36%40%7%
522
21st to endNight
6%29%35%42%6%
591
August1st to 10thNight
7%26%40%40%6%
537
11th to 20thNight
8%28%38%40%5%
534
21st to endNight
7%27%31%46%8%
594
September1st to 10thNight
12%19%34%37%6%
540
11th to 20thNight
9%311%31%39%7%
584
21st to endNight
11%317%34%31%4
720
October1st to 10thNight
8%421%38%25%4
720
11th to 20thNight
15%7%29%32%16%2
720
21st to endNight
22%7%27%32%11%1
792
November1st to 10thNight
14%6%29%37%14%1
740
11th to 20thNight
17%9%33%31%11%
760
21st to endNight
23%8%29%30%10%
760
December1st to 10thNight
22%10%32%29%6%
891
11th to 20thNight
22%9%30%31%7%1
950
21st to endNight
24%11%35%26%4
1045
Page generated at 2024-01-24 08:37:26. Version ac07

Copyright 2024 Attilla Danko


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