Albuquerque
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Albuquerque clear sky chart from 2005-11-05 to 2018-03-11.

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
63%
16392
32%
49147
23%
16351
71%
16351
46%
25064

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
64%
778
32%
2522
28%
776
73%
776
49%
1189
January16th to endNight
61%
832
35%
2704
30%
832
71%
832
46%
1301
February1st to 15thNight
58%
762
31%
2425
24%
760
68%
760
45%
1190
February16th to endNight
48%
684
37%
2050
23%
684
63%
684
43%
1085
March1st to 15thNight
55%
764
35%
2127
22%
764
64%
764
46%
1123
March16th to endNight
55%
738
35%
2082
19%
738
67%
738
51%
1032
April1st to 15thNight
44%
539
33%
1798
18%
539
64%
539
42%
852
April16th to endNight
45%
540
35%
1800
23%
540
65%
540
44%
847
May1st to 15thNight
51%
539
28%
1796
20%
539
64%
539
44%
856
May16th to endNight
59%
562
30%
1594
20%
561
69%
561
49%
810
June1st to 15thNight
65%
540
28%
1440
20%
540
70%
540
52%
753
June16th to endNight
73%
540
27%
1440
22%
540
76%
540
55%
753
July1st to 15thNight
75%
510
17%
1503
16%
510
76%
510
35%
901
July16th to endNight
82%
564
18%
1593
18%
531
83%
531
34%
935
August1st to 15thNight
78%
539
18%
1695
19%
536
78%
536
35%
967
August16th to endNight
79%
573
25%
1910
27%
573
81%
573
36%
1031
September1st to 15thNight
74%
540
25%
1800
24%
540
78%
540
33%
1017
September16th to endNight
68%
597
36%
1947
30%
597
76%
597
49%
916
October1st to 15thNight
67%
720
34%
2160
25%
720
73%
720
50%
1069
October16th to endNight
70%
768
40%
2304
28%
768
78%
768
56%
1070
November1st to 15thNight
67%
799
40%
2319
26%
799
77%
799
61%
1053
November16th to endNight
65%
975
40%
2535
27%
975
71%
975
55%
1325
December1st to 15thNight
62%
975
32%
2717
22%
975
69%
975
50%
1406
December16th to endNight
58%
1014
33%
2886
24%
1014
65%
1014
43%
1583

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
321232345%7%62%
49463
Night
4313323447%62%
49344
TransparencyDay
20%5%8%22%27%16%
49159
Night
22%48%21%27%15%
49149
SeeingDay
5%9%22%32%25%5%
6010
Night
5%5%20%41%24%2
16398

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
3312313447%64%
1746
16th to endDay
432222223469%
1872
February1st to 15thDay
4423213335%64%
1767
16th to endDay
35%1222335%7%61%
1710
March1st to 15thDay
3213214447%62%
2066
16th to endDay
2212223446%66%
2139
April1st to 15thDay
3212213448%64%
2150
16th to endDay
3312213335%69%
2160
May1st to 15thDay
311232335%8%64%
2151
16th to endDay
221232335%7%67%
2516
June1st to 15thDay
11222345%8%67%
2520
16th to endDay
112213347%70%
2520
July1st to 15thDay
3213435%7%8%11%47%
2362
16th to endDay
3214437%8%9%12%42%
2467
August1st to 15thDay
4213435%6%6%11%49%
2256
16th to endDay
3313435%6%8%10%50%
2292
September1st to 15thDay
5%3145%35%6%6%7%49%
2160
16th to endDay
3213213445%67%
2009
October1st to 15thDay
4212211346%69%
1800
16th to endDay
211121233476%
1920
November1st to 15thDay
211213346%72%
1855
16th to endDay
3212213226%70%
1755
December1st to 15thDay
45%12312335%65%
1570
16th to endDay
45%24223347%59%
1700
January1st to 15thNight
4312312236%67%
2522
16th to endNight
5%212212246%66%
2704
February1st to 15thNight
4312323335%65%
2415
16th to endNight
5%5%13313335%63%
2050
March1st to 15thNight
5%313313346%63%
2127
16th to endNight
4312212245%67%
2082
April1st to 15thNight
4213323446%64%
1798
16th to endNight
4312313335%66%
1800
May1st to 15thNight
3213313447%61%
1796
16th to endNight
4212313447%63%
1594
June1st to 15thNight
2132245%6%9%60%
1440
16th to endNight
1112225%5%7%8%61%
1440
July1st to 15thNight
2225%446%7%8%11%44%
1593
16th to endNight
22145%48%7%10%13%40%
1701
August1st to 15thNight
34135%45%6%8%11%44%
1704
16th to endNight
4213435%6%9%12%46%
1910
September1st to 15thNight
4314446%7%6%10%45%
1800
16th to endNight
4212323345%66%
1947
October1st to 15thNight
321232334468%
2160
16th to endNight
221221333472%
2304
November1st to 15thNight
212112335%74%
2319
16th to endNight
5%312113235%70%
2535
December1st to 15thNight
5%312212335%66%
2717
16th to endNight
6%414323336%60%
2886

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
18%5%9%31%29%4
1747
16th to endDay
20%37%27%32%9%
1872
February1st to 15thDay
22%37%30%24%11%
1768
16th to endDay
22%35%22%32%13%
1710
March1st to 15thDay
21%3321%33%15%
2066
16th to endDay
19%3419%37%16%
2139
April1st to 15thDay
19%3420%34%16%
2150
16th to endDay
17%3317%34%23%
2160
May1st to 15thDay
17%47%18%29%22%
2151
16th to endDay
16%5%6%17%28%26%
2519
June1st to 15thDay
16%36%15%22%36%
2520
16th to endDay
13%5%5%17%24%33%
2520
July1st to 15thDay
25%8%12%19%17%15%
2223
16th to endDay
26%11%19%28%12%2
2312
August1st to 15thDay
26%8%17%22%18%6%
2241
16th to endDay
24%8%14%25%19%7%
2292
September1st to 15thDay
29%7%12%20%19%10%
2160
16th to endDay
18%45%21%28%21%
2009
October1st to 15thDay
16%37%18%32%20%
1800
16th to endDay
13%35%20%38%17%
1920
November1st to 15thDay
14%36%23%38%13%
1855
16th to endDay
18%2325%36%14%
1755
December1st to 15thDay
23%28%36%20%8%
1570
16th to endDay
25%412%29%23%3
1700
January1st to 15thNight
20%38%30%30%6%
2522
16th to endNight
20%46%25%34%8%
2704
February1st to 15thNight
22%27%26%25%13%
2425
16th to endNight
25%3319%33%15%
2050
March1st to 15thNight
23%3320%32%16%
2127
16th to endNight
19%25%17%37%17%
2082
April1st to 15thNight
20%3420%31%19%
1798
16th to endNight
20%35%13%34%23%
1800
May1st to 15thNight
21%38%15%28%21%
1797
16th to endNight
20%49%15%24%25%
1595
June1st to 15thNight
19%49%14%17%34%
1440
16th to endNight
17%5%11%12%19%33%
1440
July1st to 15thNight
30%8%17%16%14%13%
1503
16th to endNight
28%9%24%23%10%3
1593
August1st to 15thNight
28%8%19%21%13%8%
1695
16th to endNight
25%9%17%25%14%7%
1910
September1st to 15thNight
30%6%17%19%15%10%
1800
16th to endNight
20%37%18%27%23%
1947
October1st to 15thNight
19%37%15%28%25%
2160
16th to endNight
16%25%15%36%23%
2304
November1st to 15thNight
13%2422%39%16%
2319
16th to endNight
19%2320%35%18%
2535
December1st to 15thNight
22%28%28%29%8%
2717
16th to endNight
26%39%33%23%4
2886

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
10%7%21%37%20%2
135
16th to endDay
29%28%25%28%5%
144
February1st to 15thDay
5%8%23%41%18%2
135
16th to endDay
10%11%34%28%15%
120
March1st to 15thDay
6%15%29%31%15%
283
16th to endDay
7%24%31%22%11%1
288
April1st to 15thDay
7%26%34%21%8%2
269
16th to endDay
10%25%35%20%7%1
270
May1st to 15thDay
6%20%37%26%8%1
288
16th to endDay
311%28%36%17%1
417
June1st to 15thDay
27%19%34%32%3
495
16th to endDay
1213%32%43%6%
495
July1st to 15thDay
3214%37%33%7%
327
16th to endDay
326%28%36%22%
327
August1st to 15thDay
327%33%40%11%
315
16th to endDay
5%12%34%34%12%
332
September1st to 15thDay
6%116%39%30%5%
315
16th to endDay
47%24%34%25%3
227
October1st to 15thDay
5%226%31%24%8%
135
16th to endDay
4216%31%36%8%
144
November1st to 15thDay
38%25%37%22%2
135
16th to endDay
8%11%28%32%17%1
135
December1st to 15thDay
6%425%40%19%4
135
16th to endDay
13%10%18%36%20%
144
January1st to 15thNight
6%321%46%20%2
780
16th to endNight
6%5%23%41%20%1
832
February1st to 15thNight
7%5%24%44%16%1
764
16th to endNight
7%11%31%42%7%
684
March1st to 15thNight
6%7%26%42%15%
764
16th to endNight
5%9%26%43%15%
738
April1st to 15thNight
5%14%32%37%9%
539
16th to endNight
6%11%32%37%9%
540
May1st to 15thNight
47%30%45%10%
540
16th to endNight
5%6%24%41%21%
563
June1st to 15thNight
2422%48%21%
540
16th to endNight
2215%45%31%2
540
July1st to 15thNight
319%36%44%3
510
16th to endNight
31325%59%6%
564
August1st to 15thNight
315%30%50%8%
539
16th to endNight
37%36%47%5%
573
September1st to 15thNight
4210%40%38%3
540
16th to endNight
5%217%40%30%3
597
October1st to 15thNight
4419%46%22%3
720
16th to endNight
3318%42%28%4
768
November1st to 15thNight
3323%41%25%1
799
16th to endNight
7%6%18%37%25%4
975
December1st to 15thNight
7%6%20%45%19%1
975
16th to endNight
9%5%20%49%13%1
1014
Page generated at 2018-03-12 11:28:08. Version ac04

Copyright 2018 A. Danko


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