Temple Terrace
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Temple Terrace clear sky chart from 2005-11-06 to 2024-02-20.

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
56%
24563
20%
79784
16%
24461
62%
24461
28%
49228

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
41%
755
21%
4039
16%
737
53%
737
16%
2443
January11th to 20thNight
47%
755
19%
4066
21%
740
59%
740
15%
2733
January21st to endNight
36%
831
17%
4188
15%
814
47%
814
17%
2403
February1st to 10thNight
42%
760
26%
2280
16%
760
52%
760
32%
1370
February11th to 20thNight
46%
739
24%
2214
15%
739
55%
739
35%
1267
February21st to endNight
46%
592
28%
1724
17%
592
56%
592
34%
1020
March1st to 10thNight
45%
720
32%
1980
18%
720
56%
720
44%
1085
March11th to 20thNight
48%
720
30%
1980
17%
720
58%
720
40%
1139
March21st to endNight
50%
792
30%
2178
19%
792
58%
792
41%
1230
April1st to 10thNight
51%
720
24%
1980
17%
720
57%
720
43%
1097
April11th to 20thNight
45%
711
21%
1953
13%
711
52%
711
36%
1156
April21st to endNight
54%
707
31%
1819
19%
707
61%
707
46%
1040
May1st to 10thNight
72%
540
33%
1620
27%
540
76%
540
53%
779
May11th to 20thNight
65%
531
18%
1592
13%
531
70%
531
34%
975
May21st to endNight
74%
582
24%
1745
19%
582
76%
582
40%
1002
June1st to 10thNight
66%
540
14%
1620
12%
540
67%
540
26%
1086
June11th to 20thNight
77%
540
13%
1620
11%
540
78%
540
31%
1036
June21st to endNight
74%
540
10%
1620
9%
540
74%
540
25%
1107
July1st to 10thNight
74%
525
5%
1575
5%
525
74%
525
22%
1131
July11th to 20thNight
79%
522
4%
1566
4%
522
79%
522
22%
1157
July21st to endNight
74%
591
8%
1672
8%
558
75%
558
23%
1162
August1st to 10thNight
77%
537
5%
1600
5%
534
77%
534
27%
1090
August11th to 20thNight
75%
534
6%
1772
7%
534
75%
534
23%
1195
August21st to endNight
62%
776
9%
2162
8%
776
62%
776
19%
1586
September1st to 10thNight
67%
720
8%
1980
7%
720
67%
720
20%
1434
September11th to 20thNight
61%
720
9%
1980
9%
720
62%
720
21%
1440
September21st to endNight
60%
720
19%
1980
16%
720
63%
720
25%
1369
October1st to 10thNight
56%
720
22%
1980
18%
720
61%
720
30%
1279
October11th to 20thNight
63%
720
30%
2123
28%
720
68%
720
37%
1216
October21st to endNight
54%
792
28%
2376
24%
792
62%
792
35%
1371
November1st to 10thNight
52%
740
28%
2221
21%
740
62%
740
39%
1218
November11th to 20thNight
51%
760
30%
2280
23%
760
62%
760
34%
1336
November21st to endNight
49%
760
27%
2427
21%
760
59%
760
31%
1419
December1st to 10thNight
50%
760
29%
2470
22%
760
62%
760
34%
1396
December11th to 20thNight
50%
759
26%
2938
21%
758
57%
758
25%
1679
December21st to endNight
47%
832
16%
4464
22%
817
55%
817
16%
2782

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
9%5%36%7%46%6%7%9%38%
78820
Night
9%6%36%5%35%5%6%9%43%
80374
TransparencyDay
41%5%15%19%15%6%
78543
Night
38%5%16%20%15%5%
80170
SeeingDay
9%5%19%26%23%17%
14442
Night
9%420%33%25%8%
24588

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
11%8%36%5%35%5%6%9%39%
2836
11th to 20thDay
22%10%35%5%2345%8%34%
2840
21st to endDay
11%5%35%5%346%6%7%45%
3378
February1st to 10thDay
13%5%25%5%345%410%45%
1900
11th to 20thDay
8%4245%3445%7%55%
1838
21st to endDay
8%5%25%5%35%46%7%50%
1529
March1st to 10thDay
4314435%5%5%9%57%
1980
11th to 20thDay
7%425%5%345%6%8%52%
1980
21st to endDay
7%425%5%3445%8%53%
2178
April1st to 10thDay
7%3245%36%5%6%10%49%
1980
11th to 20thDay
8%5%36%6%46%6%6%9%42%
1956
21st to endDay
4324436%6%6%9%53%
2154
May1st to 10thDay
5%3234245%6%9%57%
2340
11th to 20thDay
8%5%25%7%47%6%7%9%40%
2301
21st to endDay
6%426%8%5%7%8%7%9%37%
2531
June1st to 10thDay
12%7%37%7%6%8%7%9%10%23%
2340
11th to 20thDay
6%5%37%8%6%9%8%10%11%27%
2340
21st to endDay
8%5%38%8%6%7%8%9%12%26%
2340
July1st to 10thDay
8%6%47%9%6%9%10%9%10%22%
2340
11th to 20thDay
7%6%48%10%7%9%8%9%11%23%
2340
21st to endDay
7%6%39%9%6%9%9%9%11%23%
2547
August1st to 10thDay
7%5%38%10%6%9%10%9%10%23%
2325
11th to 20thDay
7%6%49%10%7%9%9%10%10%21%
2121
21st to endDay
10%7%39%9%6%8%8%9%10%22%
2178
September1st to 10thDay
7%5%38%10%5%8%9%8%12%23%
1980
11th to 20thDay
10%6%47%9%6%8%6%9%9%26%
1980
21st to endDay
9%5%37%8%5%7%6%8%10%31%
1980
October1st to 10thDay
8%6%37%7%47%6%7%9%35%
1980
11th to 20thDay
6%425%5%46%7%6%7%48%
1836
21st to endDay
7%425%5%345%7%10%48%
1980
November1st to 10thDay
8%425%5%345%6%8%50%
1857
11th to 20thDay
9%5%25%6%36%45%8%46%
1900
21st to endDay
8%5%35%5%45%5%7%9%44%
1748
December1st to 10thDay
7%425%5%46%6%5%9%47%
1710
11th to 20thDay
11%6%26%5%345%5%8%45%
2153
21st to endDay
12%8%47%7%46%6%5%7%35%
3124
January1st to 10thNight
12%7%47%6%35%5%5%7%38%
4109
11th to 20thNight
19%11%36%6%3445%7%32%
4120
21st to endNight
11%7%36%6%35%5%7%8%39%
4275
February1st to 10thNight
11%6%35%4345%6%7%47%
2280
11th to 20thNight
9%5%2443445%8%51%
2213
21st to endNight
7%5%36%5%35%448%49%
1724
March1st to 10thNight
5%42333446%7%58%
1980
11th to 20thNight
6%325%4445%6%9%51%
1980
21st to endNight
6%42443445%8%56%
2178
April1st to 10thNight
6%3145%3446%10%53%
1980
11th to 20thNight
7%435%5%36%6%6%9%48%
1953
21st to endNight
6%42443345%7%58%
1819
May1st to 10thNight
331332446%8%63%
1620
11th to 20thNight
6%425%6%36%6%7%8%46%
1592
21st to endNight
6%3245%35%5%7%10%51%
1744
June1st to 10thNight
11%6%35%6%37%6%6%11%35%
1620
11th to 20thNight
5%436%6%36%6%8%14%38%
1620
21st to endNight
7%5%36%6%5%7%7%9%13%33%
1620
July1st to 10thNight
7%5%36%6%48%8%10%13%31%
1620
11th to 20thNight
5%6%35%6%5%8%9%9%14%29%
1620
21st to endNight
45%38%8%5%7%9%10%12%30%
1771
August1st to 10thNight
4426%7%47%7%10%13%34%
1611
11th to 20thNight
46%37%6%5%6%8%9%14%32%
1772
21st to endNight
8%8%39%7%47%6%7%12%30%
2162
September1st to 10thNight
5%6%37%8%5%8%9%9%12%29%
1980
11th to 20thNight
9%7%38%7%37%7%8%11%30%
1980
21st to endNight
10%7%47%7%46%6%7%9%34%
1980
October1st to 10thNight
8%6%35%6%35%6%8%8%42%
1980
11th to 20thNight
7%425%5%345%6%8%51%
2123
21st to endNight
8%5%36%5%2445%8%51%
2376
November1st to 10thNight
8%4244345%5%7%54%
2221
11th to 20thNight
9%5%25%5%3445%7%51%
2280
21st to endNight
7%6%26%6%445%6%8%46%
2427
December1st to 10thNight
8%425%6%35%5%6%8%49%
2470
11th to 20thNight
13%6%25%433448%47%
3042
21st to endNight
14%8%47%6%35%5%6%8%35%
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
43%27%22%19%8%
2837
11th to 20thDay
50%25%18%17%8%
2840
21st to endDay
39%27%22%24%7%
3378
February1st to 10thDay
36%39%21%20%11%
1900
11th to 20thDay
29%38%21%27%11%
1848
21st to endDay
33%311%18%25%10%
1529
March1st to 10thDay
24%311%27%24%11%
1980
11th to 20thDay
30%410%27%20%10%
1980
21st to endDay
30%39%25%24%9%
2178
April1st to 10thDay
30%416%23%19%8%
1980
11th to 20thDay
38%411%18%22%7%
1956
21st to endDay
27%310%25%26%8%
2154
May1st to 10thDay
23%411%27%25%10%
2340
11th to 20thDay
40%414%22%17%3
2305
21st to endDay
41%5%13%21%18%3
2531
June1st to 10thDay
53%5%19%17%5%
2340
11th to 20thDay
45%8%23%20%4
2340
21st to endDay
48%8%26%15%31
2340
July1st to 10thDay
53%9%28%8%1
2275
11th to 20thDay
52%10%27%10%
2271
21st to endDay
50%10%27%13%1
2405
August1st to 10thDay
51%8%30%11%
2312
11th to 20thDay
53%10%25%11%1
2121
21st to endDay
53%9%23%13%1
2178
September1st to 10thDay
50%10%23%15%2
1980
11th to 20thDay
52%7%22%14%5%
1980
21st to endDay
45%5%16%20%11%3
1980
October1st to 10thDay
44%6%11%18%12%9%
1980
11th to 20thDay
34%47%24%24%6%
1836
21st to endDay
32%310%21%22%13%
1980
November1st to 10thDay
32%39%23%20%12%
1857
11th to 20thDay
37%47%21%22%9%
1900
21st to endDay
35%49%22%21%8%
1748
December1st to 10thDay
34%312%28%17%6%
1710
11th to 20thDay
38%210%19%19%12%
2150
21st to endDay
49%39%19%16%5%
3124
January1st to 10thNight
47%28%18%19%6%
4109
11th to 20thNight
54%26%20%14%5%
4120
21st to endNight
44%211%17%19%7%
4275
February1st to 10thNight
36%310%20%20%10%
2280
11th to 20thNight
33%310%20%25%9%
2214
21st to endNight
35%312%19%24%7%
1724
March1st to 10thNight
26%310%28%24%8%
1980
11th to 20thNight
30%312%30%16%8%
1980
21st to endNight
28%310%29%22%7%
2178
April1st to 10thNight
27%320%26%18%7%
1980
11th to 20thNight
32%413%24%21%5%
1953
21st to endNight
27%311%28%24%7%
1819
May1st to 10thNight
19%313%32%24%9%
1620
11th to 20thNight
34%6%20%21%17%2
1593
21st to endNight
29%5%19%24%20%2
1745
June1st to 10thNight
43%6%22%22%7%
1620
11th to 20thNight
35%8%30%22%4
1620
21st to endNight
40%11%28%15%6%
1620
July1st to 10thNight
42%13%33%9%2
1575
11th to 20thNight
43%14%33%9%1
1566
21st to endNight
41%13%33%13%1
1672
August1st to 10thNight
36%13%39%11%1
1600
11th to 20thNight
40%12%34%14%
1772
21st to endNight
47%11%25%14%3
2162
September1st to 10thNight
44%14%27%13%3
1980
11th to 20thNight
47%10%24%16%31
1980
21st to endNight
46%6%17%19%10%3
1980
October1st to 10thNight
38%7%15%19%14%7%
1980
11th to 20thNight
32%39%26%24%5%
2123
21st to endNight
34%310%19%24%10%
2376
November1st to 10thNight
30%312%22%22%12%
2221
11th to 20thNight
34%49%22%22%9%
2280
21st to endNight
37%38%25%19%8%
2427
December1st to 10thNight
34%311%30%17%5%
2470
11th to 20thNight
38%39%20%20%11%
3044
21st to endNight
48%312%18%16%4
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
13%11%46%23%6%1
270
11th to 20thDay
11%13%36%30%9%2
270
21st to endDay
18%14%46%16%6%
297
February1st to 10thDay
15%10%37%26%11%1
270
11th to 20thDay
12%9%36%30%10%3
267
21st to endDay
9%11%33%31%15%2
247
March1st to 10thDay
5%12%40%32%11%1
420
11th to 20thDay
11%7%29%32%19%2
420
21st to endDay
7%9%31%32%19%3
462
April1st to 10thDay
9%11%30%29%18%3
420
11th to 20thDay
10%8%29%32%16%5%
412
21st to endDay
5%7%25%30%26%7%
420
May1st to 10thDay
5%422%35%25%9%
423
11th to 20thDay
9%217%30%27%15%
447
21st to endDay
7%210%23%33%25%
485
June1st to 10thDay
15%210%23%28%23%
450
11th to 20thDay
8%26%23%30%31%
450
21st to endDay
6%2417%28%43%
450
July1st to 10thDay
7%1111%28%51%
445
11th to 20thDay
42115%31%46%
444
21st to endDay
8%2317%31%39%
488
August1st to 10thDay
7%2314%31%43%
446
11th to 20thDay
9%2213%29%45%
439
21st to endDay
10%3419%29%35%
495
September1st to 10thDay
8%35%15%31%38%
450
11th to 20thDay
10%45%25%30%26%
450
21st to endDay
7%37%24%35%24%
450
October1st to 10thDay
9%317%37%26%8%
450
11th to 20thDay
6%318%37%29%8%
450
21st to endDay
9%419%39%25%4
495
November1st to 10thDay
11%6%22%32%24%5%
455
11th to 20thDay
13%5%25%36%17%4
460
21st to endDay
8%6%34%35%15%2
308
December1st to 10thDay
6%11%38%26%14%6%
270
11th to 20thDay
11%10%37%27%12%2
270
21st to endDay
10%10%31%34%12%3
297
January1st to 10thNight
12%9%31%36%12%1
760
11th to 20thNight
12%9%24%40%13%1
760
21st to endNight
15%9%34%34%8%
836
February1st to 10thNight
15%6%31%33%14%
760
11th to 20thNight
11%7%30%37%13%1
742
21st to endNight
9%6%29%46%11%
592
March1st to 10thNight
6%6%38%40%9%1
720
11th to 20thNight
8%6%31%38%15%1
720
21st to endNight
7%6%30%41%15%1
792
April1st to 10thNight
7%5%30%41%16%
720
11th to 20thNight
7%6%35%37%14%1
711
21st to endNight
8%427%42%18%1
707
May1st to 10thNight
5%116%46%29%3
540
11th to 20thNight
8%217%40%29%5%
531
21st to endNight
5%211%37%39%6%
584
June1st to 10thNight
11%29%26%42%9%
540
11th to 20thNight
6%1320%45%24%
540
21st to endNight
7%1417%42%29%
540
July1st to 10thNight
8%219%48%33%
525
11th to 20thNight
5%218%44%39%
522
21st to endNight
5%2210%48%33%
591
August1st to 10thNight
42112%49%33%
537
11th to 20thNight
5%219%40%43%
534
21st to endNight
12%35%20%36%24%
776
September1st to 10thNight
9%35%20%44%20%
720
11th to 20thNight
11%35%29%38%14%
720
21st to endNight
11%38%32%34%12%
720
October1st to 10thNight
10%320%40%22%5%
720
11th to 20thNight
7%317%40%31%2
720
21st to endNight
10%421%41%22%2
792
November1st to 10thNight
8%330%37%19%3
740
11th to 20thNight
11%326%41%18%1
760
21st to endNight
10%428%42%14%1
760
December1st to 10thNight
9%429%36%21%1
760
11th to 20thNight
11%7%23%40%18%1
760
21st to endNight
11%5%30%37%16%1
836
Page generated at 2024-02-17 06:28:38. Version ac07

Copyright 2024 Attilla Danko


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