Santa Fe (TX)
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Santa Fe (TX) clear sky chart from 2005-11-06 to 2024-01-16.

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
57%
23632
22%
74303
18%
23575
61%
23575
29%
45204

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
40%
948
23%
2458
11%
946
46%
946
28%
1657
January11th to 20thNight
39%
930
22%
2418
10%
930
45%
930
29%
1630
January21st to endNight
37%
990
24%
2574
11%
990
44%
990
27%
1757
February1st to 10thNight
34%
837
19%
2277
9%
837
40%
837
23%
1594
February11th to 20thNight
36%
650
19%
2044
12%
646
41%
646
23%
1336
February21st to endNight
28%
444
20%
1628
12%
444
38%
444
16%
1091
March1st to 10thNight
40%
540
22%
1980
16%
540
49%
540
22%
1234
March11th to 20thNight
43%
540
18%
1980
15%
540
47%
540
20%
1260
March21st to endNight
50%
594
24%
2178
20%
594
58%
594
27%
1247
April1st to 10thNight
45%
540
21%
1980
19%
540
53%
540
21%
1240
April11th to 20thNight
43%
533
22%
1803
16%
533
52%
533
24%
1111
April21st to endNight
47%
540
23%
1800
21%
540
54%
540
25%
1112
May1st to 10thNight
52%
540
20%
1800
21%
540
56%
540
25%
1093
May11th to 20thNight
62%
531
23%
1609
25%
531
64%
531
34%
940
May21st to endNight
69%
583
21%
1746
23%
582
70%
582
33%
1039
June1st to 10thNight
80%
540
22%
1620
27%
540
80%
540
43%
875
June11th to 20thNight
80%
540
20%
1620
24%
540
80%
540
41%
896
June21st to endNight
74%
540
15%
1620
19%
540
74%
540
31%
1010
July1st to 10thNight
73%
525
14%
1575
18%
525
73%
525
29%
992
July11th to 20thNight
86%
522
19%
1566
24%
522
86%
522
41%
862
July21st to endNight
85%
591
17%
1673
21%
558
86%
558
39%
934
August1st to 10thNight
91%
537
23%
1601
25%
534
91%
534
52%
781
August11th to 20thNight
84%
534
21%
1723
25%
534
84%
534
38%
935
August21st to endNight
79%
594
17%
1988
21%
594
79%
594
30%
1164
September1st to 10thNight
78%
540
14%
1980
17%
540
79%
540
28%
1141
September11th to 20thNight
68%
540
20%
1980
23%
540
69%
540
22%
1241
September21st to endNight
73%
540
27%
1980
30%
540
73%
540
31%
1073
October1st to 10thNight
77%
644
31%
2084
29%
644
78%
644
41%
1091
October11th to 20thNight
68%
720
33%
2160
26%
720
71%
720
43%
1160
October21st to endNight
63%
792
33%
2376
25%
792
68%
792
39%
1318
November1st to 10thNight
65%
740
27%
2220
23%
740
67%
740
37%
1263
November11th to 20thNight
56%
760
28%
2280
21%
760
62%
760
32%
1377
November21st to endNight
48%
760
27%
2280
19%
760
55%
760
29%
1450
December1st to 10thNight
46%
945
25%
2465
15%
945
50%
945
28%
1666
December11th to 20thNight
40%
949
22%
2881
11%
948
45%
948
22%
1925
December21st to endNight
37%
1039
14%
4356
10%
1026
43%
1026
16%
2709

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
12%6%35%5%45%6%6%9%39%
74991
Night
12%5%25%5%3445%8%47%
74840
TransparencyDay
39%9%14%19%14%6%
74716
Night
36%7%14%20%16%8%
74635
SeeingDay
12%5%17%28%27%13%
13667
Night
14%5%18%31%27%6%
23642

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%7%25%5%35%447%40%
1707
11th to 20thDay
17%7%25%423448%43%
1670
21st to endDay
20%7%37%433446%39%
1782
February1st to 10thDay
21%10%46%4245%4435%
1696
11th to 20thDay
22%9%35%5%3445%5%36%
1800
21st to endDay
22%9%245%34347%37%
1628
March1st to 10thDay
19%7%36%6%3445%6%36%
1980
11th to 20thDay
17%7%46%5%24446%41%
1980
21st to endDay
16%6%34435%36%7%44%
2178
April1st to 10thDay
16%8%36%5%345%6%8%37%
1980
11th to 20thDay
16%7%36%5%45%46%7%38%
2106
21st to endDay
11%6%35%5%35%5%5%6%45%
2160
May1st to 10thDay
10%6%36%6%35%6%7%8%40%
2160
11th to 20thDay
10%6%26%6%45%6%7%9%40%
2282
21st to endDay
8%5%36%7%5%7%8%8%12%30%
2531
June1st to 10thDay
6%435%6%46%6%8%10%43%
2340
11th to 20thDay
5%425%5%47%8%9%13%38%
2340
21st to endDay
9%435%6%5%9%8%9%13%29%
2340
July1st to 10thDay
11%6%35%5%47%7%10%14%30%
2340
11th to 20thDay
6%435%7%47%7%10%12%35%
2340
21st to endDay
6%435%6%47%8%9%13%35%
2546
August1st to 10thDay
33145%5%7%8%10%14%41%
2328
11th to 20thDay
4425%7%47%8%9%14%36%
2176
21st to endDay
9%437%7%47%7%8%12%33%
2361
September1st to 10thDay
8%6%26%7%5%7%7%7%11%33%
1980
11th to 20thDay
15%7%26%6%5%6%7%7%7%33%
1980
21st to endDay
10%5%25%6%35%5%7%9%43%
1980
October1st to 10thDay
7%425%435%5%6%8%51%
1856
11th to 20thDay
12%5%2442346%7%51%
1800
21st to endDay
12%42443335%6%54%
1980
November1st to 10thDay
10%5%245%35%5%6%8%46%
1858
11th to 20thDay
15%5%25%4445%47%46%
1900
21st to endDay
16%7%35%5%4445%6%43%
1900
December1st to 10thDay
16%6%35%5%35%5%5%8%40%
1710
11th to 20thDay
13%7%36%5%36%45%8%40%
2161
21st to endDay
16%7%345%3445%7%42%
3135
January1st to 10thNight
19%7%25%424446%43%
2458
11th to 20thNight
19%6%25%424335%46%
2418
21st to endNight
19%7%35%5%2445%5%42%
2574
February1st to 10thNight
19%8%36%5%245%46%38%
2277
11th to 20thNight
21%8%345%23345%43%
2044
21st to endNight
20%9%46%5%33435%39%
1628
March1st to 10thNight
19%8%35%42445%7%41%
1980
11th to 20thNight
15%8%35%6%2445%8%40%
1980
21st to endNight
14%6%234245%46%50%
2178
April1st to 10thNight
14%6%36%5%3446%9%39%
1980
11th to 20thNight
17%6%2442445%7%43%
1803
21st to endNight
12%5%36%6%36%5%5%7%43%
1800
May1st to 10thNight
11%7%25%5%35%5%7%9%41%
1800
11th to 20thNight
10%4244345%7%9%48%
1608
21st to endNight
6%425%6%35%6%8%13%43%
1745
June1st to 10thNight
5%32342446%11%55%
1620
11th to 20thNight
6%3135%25%5%6%12%52%
1620
21st to endNight
5%425%6%36%7%8%12%41%
1620
July1st to 10thNight
7%5%35%5%45%6%8%13%40%
1620
11th to 20thNight
3213435%5%7%13%55%
1620
21st to endNight
3224335%5%9%12%52%
1772
August1st to 10thNight
21232446%11%65%
1611
11th to 20thNight
43134236%7%15%51%
1723
21st to endNight
5%325%5%45%5%7%11%47%
1988
September1st to 10thNight
4425%6%35%6%9%12%44%
1980
11th to 20thNight
11%6%25%5%346%7%7%43%
1980
21st to endNight
8%4345%3445%8%53%
1980
October1st to 10thNight
5%424424447%60%
2084
11th to 20thNight
9%42432445%7%59%
2160
21st to endNight
11%42342334460%
2376
November1st to 10thNight
9%5%25%424347%55%
2220
11th to 20thNight
13%424435%45%6%50%
2280
21st to endNight
15%6%35%5%3445%5%46%
2280
December1st to 10thNight
18%7%25%5%24447%42%
2465
11th to 20thNight
15%8%35%4345%5%7%41%
3036
21st to endNight
16%7%36%5%34446%43%
4532

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
45%6%6%16%19%8%
1708
11th to 20thDay
41%6%7%16%18%11%
1670
21st to endDay
46%46%17%15%12%
1782
February1st to 10thDay
52%5%7%13%14%10%
1696
11th to 20thDay
50%5%9%11%17%7%
1810
21st to endDay
49%7%9%13%14%8%
1628
March1st to 10thDay
48%7%10%14%16%5%
1980
11th to 20thDay
45%6%10%12%19%8%
1980
21st to endDay
38%8%12%15%21%6%
2178
April1st to 10thDay
45%8%8%18%14%7%
1980
11th to 20thDay
45%6%11%16%15%8%
2106
21st to endDay
37%7%12%19%20%6%
2160
May1st to 10thDay
40%8%13%17%16%7%
2160
11th to 20thDay
37%9%13%22%16%3
2286
21st to endDay
40%11%16%21%11%1
2531
June1st to 10thDay
31%10%19%25%15%
2340
11th to 20thDay
32%11%18%26%12%1
2340
21st to endDay
39%14%19%20%7%
2340
July1st to 10thDay
37%12%24%22%5%
2276
11th to 20thDay
34%12%28%21%5%
2271
21st to endDay
32%13%25%25%41
2405
August1st to 10thDay
26%12%26%28%8%
2314
11th to 20thDay
31%16%23%25%5%1
2176
21st to endDay
40%12%20%19%7%2
2361
September1st to 10thDay
40%13%16%17%11%3
1980
11th to 20thDay
46%10%14%16%12%2
1980
21st to endDay
36%9%14%18%16%8%
1980
October1st to 10thDay
29%6%11%24%19%11%
1856
11th to 20thDay
31%5%10%20%21%12%
1800
21st to endDay
31%5%7%18%23%15%
1980
November1st to 10thDay
34%7%11%19%21%7%
1858
11th to 20thDay
37%6%11%14%20%11%
1900
21st to endDay
43%5%8%17%17%9%
1900
December1st to 10thDay
41%8%10%20%15%6%
1710
11th to 20thDay
41%7%9%14%18%9%
2159
21st to endDay
41%6%8%15%19%11%
3135
January1st to 10thNight
43%5%7%14%20%11%
2458
11th to 20thNight
42%5%6%15%20%13%
2418
21st to endNight
44%46%15%18%13%
2574
February1st to 10thNight
48%5%9%10%17%11%
2277
11th to 20thNight
45%49%13%17%12%
2044
21st to endNight
49%6%7%12%16%10%
1628
March1st to 10thNight
43%5%11%17%16%8%
1980
11th to 20thNight
43%7%12%13%17%8%
1980
21st to endNight
36%5%12%18%20%9%
2178
April1st to 10thNight
42%7%11%18%14%8%
1980
11th to 20thNight
39%6%11%17%15%12%
1803
21st to endNight
39%6%10%21%16%7%
1800
May1st to 10thNight
37%8%13%19%16%8%
1800
11th to 20thNight
31%7%14%24%20%4
1609
21st to endNight
29%10%21%27%12%1
1746
June1st to 10thNight
24%6%21%30%19%
1620
11th to 20thNight
26%7%17%33%16%1
1620
21st to endNight
33%10%23%24%10%
1620
July1st to 10thNight
34%10%25%26%5%
1575
11th to 20thNight
21%11%33%28%6%
1566
21st to endNight
22%12%30%32%41
1673
August1st to 10thNight
14%9%30%40%7%
1601
11th to 20thNight
21%12%30%30%6%1
1723
21st to endNight
29%12%23%28%7%1
1988
September1st to 10thNight
29%12%24%18%13%3
1980
11th to 20thNight
38%11%13%21%15%2
1980
21st to endNight
30%7%14%22%20%7%
1980
October1st to 10thNight
25%6%11%28%19%12%
2084
11th to 20thNight
25%5%10%24%23%12%
2160
21st to endNight
28%47%17%26%18%
2376
November1st to 10thNight
30%5%12%22%21%9%
2220
11th to 20thNight
35%6%10%20%19%10%
2280
21st to endNight
41%410%20%18%8%
2280
December1st to 10thNight
43%5%10%20%14%8%
2465
11th to 20thNight
43%6%8%13%17%14%
3037
21st to endNight
43%6%7%13%23%8%
4532

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
22%8%34%26%9%1
270
11th to 20thDay
19%10%32%32%8%1
257
21st to endDay
19%11%34%29%7%
264
February1st to 10thDay
26%9%35%22%8%
240
11th to 20thDay
24%13%30%27%5%1
240
21st to endDay
22%14%40%22%2
198
March1st to 10thDay
20%10%40%23%7%
240
11th to 20thDay
18%8%45%20%6%2
240
21st to endDay
15%11%37%28%8%
264
April1st to 10thDay
20%10%35%27%9%
240
11th to 20thDay
19%13%29%24%14%2
384
21st to endDay
14%7%29%34%15%2
420
May1st to 10thDay
14%6%27%34%17%1
423
11th to 20thDay
11%421%40%20%3
605
21st to endDay
8%217%45%24%3
679
June1st to 10thDay
7%28%38%33%12%
630
11th to 20thDay
7%110%36%33%13%
630
21st to endDay
11%18%25%38%17%
630
July1st to 10thDay
7%2424%40%23%
621
11th to 20thDay
5%1122%41%30%
618
21st to endDay
41322%44%26%
684
August1st to 10thDay
2217%48%30%
626
11th to 20thDay
5%1111%46%37%
490
21st to endDay
10%26%12%33%36%
480
September1st to 10thDay
10%15%18%39%27%
270
11th to 20thDay
12%1321%43%20%
270
21st to endDay
10%1322%43%20%
270
October1st to 10thDay
6%26%37%39%10%
270
11th to 20thDay
13%410%32%30%11%
270
21st to endDay
18%7%22%27%21%5%
297
November1st to 10thDay
13%416%35%27%5%
270
11th to 20thDay
16%6%20%37%16%5%
270
21st to endDay
18%11%30%25%13%3
270
December1st to 10thDay
18%7%24%30%15%6%
270
11th to 20thDay
17%14%31%29%7%1
270
21st to endDay
18%8%32%28%13%2
297
January1st to 10thNight
22%7%26%34%11%
950
11th to 20thNight
21%6%29%34%10%1
930
21st to endNight
21%8%28%34%8%
990
February1st to 10thNight
24%7%29%32%7%
837
11th to 20thNight
24%8%27%33%9%
650
21st to endNight
23%10%34%28%6%
444
March1st to 10thNight
21%6%28%34%11%
540
11th to 20thNight
16%10%25%38%10%1
540
21st to endNight
16%5%26%38%14%1
594
April1st to 10thNight
15%7%28%40%11%
540
11th to 20thNight
17%9%24%35%15%
533
21st to endNight
13%5%29%37%16%1
540
May1st to 10thNight
12%6%25%45%13%
540
11th to 20thNight
10%418%45%22%2
531
21st to endNight
5%412%41%34%3
584
June1st to 10thNight
6%2336%48%6%
540
11th to 20thNight
5%1437%47%6%
540
21st to endNight
6%16%21%54%13%
540
July1st to 10thNight
7%2317%53%18%
525
11th to 20thNight
2212%60%23%
522
21st to endNight
41113%63%18%
591
August1st to 10thNight
11110%67%20%
537
11th to 20thNight
6%19%65%19%
534
21st to endNight
6%1316%52%22%
594
September1st to 10thNight
5%1415%56%20%
540
11th to 20thNight
14%15%18%45%15%
540
21st to endNight
10%17%22%49%11%
540
October1st to 10thNight
6%17%32%45%9%
644
11th to 20thNight
10%215%34%34%5%
720
21st to endNight
11%6%16%36%28%4
792
November1st to 10thNight
10%215%37%31%4
740
11th to 20thNight
14%419%37%24%1
760
21st to endNight
16%6%26%35%15%3
760
December1st to 10thNight
19%7%22%32%18%2
945
11th to 20thNight
21%6%26%34%11%1
950
21st to endNight
21%8%27%33%11%1
1045
Page generated at 2024-01-13 18:28:32. Version ac07

Copyright 2024 Attilla Danko


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