Temiskaming Shores
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Temiskaming Shores clear sky chart from 2005-11-06 to 2024-02-05.

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
28%
23266
10%
80750
7%
23185
33%
23185
12%
61581

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
17%
943
4%
4729
4%
926
20%
926
4%
3890
January11th to 20thNight
20%
945
7%
4723
4%
930
24%
930
5%
3766
January21st to endNight
29%
859
5%
4615
6%
848
34%
848
5%
3932
February1st to 10thNight
24%
739
9%
2399
6%
739
28%
739
10%
1920
February11th to 20thNight
20%
703
9%
2275
3%
700
27%
700
12%
1766
February21st to endNight
19%
592
11%
1924
4%
592
27%
592
10%
1499
March1st to 10thNight
23%
720
12%
2017
6%
720
28%
720
14%
1571
March11th to 20thNight
22%
720
12%
1980
6%
720
28%
720
15%
1545
March21st to endNight
29%
792
17%
2178
7%
792
36%
792
20%
1567
April1st to 10thNight
26%
720
13%
1817
6%
720
29%
720
18%
1407
April11th to 20thNight
29%
569
17%
1633
10%
569
33%
569
19%
1178
April21st to endNight
33%
540
15%
1620
8%
540
38%
540
19%
1146
May1st to 10thNight
34%
432
14%
1512
13%
432
39%
432
17%
1051
May11th to 20thNight
34%
354
16%
1415
16%
354
45%
354
15%
946
May21st to endNight
39%
388
11%
1502
10%
388
48%
388
19%
950
June1st to 10thNight
38%
360
9%
1260
8%
360
43%
360
18%
876
June11th to 20thNight
39%
360
12%
1260
10%
360
43%
360
24%
769
June21st to endNight
44%
360
9%
1260
9%
360
47%
360
22%
818
July1st to 10thNight
45%
350
12%
1225
12%
350
49%
350
24%
736
July11th to 20thNight
50%
348
15%
1218
15%
348
55%
348
25%
748
July21st to endNight
52%
394
13%
1428
16%
372
55%
372
20%
888
August1st to 10thNight
48%
533
11%
1597
9%
531
52%
531
24%
1075
August11th to 20thNight
54%
534
15%
1598
11%
534
57%
534
27%
1054
August21st to endNight
42%
609
15%
1797
10%
609
44%
609
22%
1227
September1st to 10thNight
42%
720
15%
1800
8%
720
45%
720
28%
1241
September11th to 20thNight
38%
720
16%
1892
9%
720
42%
720
26%
1311
September21st to endNight
40%
720
15%
2020
11%
720
42%
720
23%
1402
October1st to 10thNight
29%
720
14%
2160
11%
720
35%
720
17%
1570
October11th to 20thNight
21%
720
8%
2160
6%
720
24%
720
11%
1732
October21st to endNight
22%
792
10%
2458
5%
792
28%
792
11%
1954
November1st to 10thNight
22%
740
11%
2592
7%
740
29%
740
12%
1938
November11th to 20thNight
18%
760
8%
2660
5%
760
22%
760
8%
2164
November21st to endNight
15%
760
4%
2660
3%
760
17%
760
6%
2260
December1st to 10thNight
16%
764
6%
2664
2%
764
20%
764
5%
2286
December11th to 20thNight
19%
950
6%
3516
3%
949
21%
949
7%
2932
December21st to endNight
17%
1036
5%
5186
3%
1026
20%
1026
4%
4466

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
16%11%5%8%7%45%5%5%6%27%
77855
Night
16%13%5%9%7%45%5%5%6%26%
81031
TransparencyDay
56%7%11%17%7%1
77548
Night
59%7%11%15%7%1
80874
SeeingDay
21%13%30%23%10%3
14086
Night
23%10%30%27%9%1
23299

By Month

Percentage Cloud Cover NE (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
14%18%8%11%8%6%7%5%5%5%12%
2208
11th to 20thDay
10%12%7%15%12%5%7%6%45%16%
2210
21st to endDay
12%18%10%14%9%45%45%5%14%
3032
February1st to 10thDay
7%13%8%13%11%6%7%5%5%5%19%
1656
11th to 20thDay
11%16%6%10%8%47%5%5%7%21%
1573
21st to endDay
12%15%6%10%9%6%5%5%5%5%23%
1332
March1st to 10thDay
12%13%6%10%9%45%5%5%6%25%
1939
11th to 20thDay
12%12%5%10%8%445%5%6%29%
1980
21st to endDay
14%13%5%7%7%45%445%33%
2178
April1st to 10thDay
18%14%49%7%345%5%6%25%
2142
11th to 20thDay
20%10%47%6%345%5%6%32%
2290
21st to endDay
21%11%46%6%34446%32%
2340
May1st to 10thDay
17%10%47%6%35%5%5%6%32%
2447
11th to 20thDay
20%10%48%6%34445%33%
2478
21st to endDay
17%8%35%5%35%5%5%8%37%
2770
June1st to 10thDay
19%8%46%6%35%5%6%8%30%
2700
11th to 20thDay
14%7%35%6%46%6%7%8%36%
2700
21st to endDay
17%8%36%6%45%5%6%8%32%
2700
July1st to 10thDay
14%6%36%5%35%6%6%9%37%
2700
11th to 20thDay
14%5%26%6%47%6%6%9%35%
2700
21st to endDay
11%6%37%7%5%6%6%7%9%34%
2806
August1st to 10thDay
13%6%37%7%47%6%7%9%30%
2327
11th to 20thDay
16%6%26%5%447%6%8%36%
2303
21st to endDay
14%7%47%7%46%5%6%9%32%
2540
September1st to 10thDay
16%6%36%5%45%6%5%8%35%
2160
11th to 20thDay
19%8%36%5%3445%7%35%
2066
21st to endDay
21%9%37%6%3445%6%32%
1940
October1st to 10thDay
19%11%47%6%35%5%46%30%
1800
11th to 20thDay
23%16%48%7%35%44421%
1800
21st to endDay
24%16%5%10%7%44445%16%
1895
November1st to 10thDay
19%14%5%9%7%35%45%5%24%
1486
11th to 20thDay
17%13%6%11%10%5%5%6%5%5%17%
1520
21st to endDay
20%19%7%12%10%45%44412%
1520
December1st to 10thDay
15%19%8%11%8%35%5%5%416%
1515
11th to 20thDay
15%18%7%8%9%46%45%5%20%
1671
21st to endDay
17%20%7%18%10%3433412%
2431
January1st to 10thNight
13%16%8%13%10%5%5%6%5%5%15%
4748
11th to 20thNight
11%13%6%13%10%6%8%7%5%5%17%
4760
21st to endNight
12%17%10%13%10%6%7%44413%
4623
February1st to 10thNight
11%13%6%11%11%6%7%6%5%6%19%
2399
11th to 20thNight
11%15%7%11%8%46%445%24%
2273
21st to endNight
11%14%6%12%9%5%5%5%46%22%
1924
March1st to 10thNight
11%16%7%10%8%5%6%445%26%
2007
11th to 20thNight
14%15%6%9%8%4445%5%26%
1979
21st to endNight
14%13%39%5%445%5%6%35%
2178
April1st to 10thNight
20%13%7%7%5%3345%5%28%
1817
11th to 20thNight
18%11%47%5%34446%32%
1633
21st to endNight
19%8%48%5%3445%6%35%
1620
May1st to 10thNight
15%11%48%5%345%5%6%34%
1512
11th to 20thNight
19%6%36%7%45%5%6%6%33%
1415
21st to endNight
15%6%45%5%445%5%8%40%
1501
June1st to 10thNight
17%7%26%7%36%6%6%6%32%
1260
11th to 20thNight
19%42443446%8%43%
1260
21st to endNight
15%5%36%445%5%5%9%38%
1260
July1st to 10thNight
12%5%25%5%35%5%7%8%42%
1260
11th to 20thNight
13%5%26%435%5%7%8%42%
1260
21st to endNight
10%5%35%6%45%6%7%9%40%
1512
August1st to 10thNight
10%6%37%6%46%6%5%10%37%
1607
11th to 20thNight
14%5%25%435%6%7%7%41%
1598
21st to endNight
17%7%36%5%3446%7%39%
1797
September1st to 10thNight
16%6%26%5%35%46%7%42%
1800
11th to 20thNight
17%7%35%5%34446%42%
1892
21st to endNight
20%7%25%5%3445%8%37%
2020
October1st to 10thNight
20%11%36%6%3445%7%32%
2160
11th to 20thNight
24%13%47%6%35%5%5%5%23%
2160
21st to endNight
22%16%48%6%35%445%23%
2458
November1st to 10thNight
17%14%5%7%7%35%45%6%27%
2592
11th to 20thNight
18%14%7%11%8%5%5%445%19%
2660
21st to endNight
20%18%7%10%7%345%5%5%15%
2660
December1st to 10thNight
17%19%8%12%8%5%5%435%13%
2664
11th to 20thNight
16%17%7%11%10%5%5%435%17%
3526
21st to endNight
19%21%6%15%9%3432413%
5236

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
71%8%12%7%1
2209
11th to 20thDay
69%6%8%13%4
2210
21st to endDay
71%6%9%9%4
3032
February1st to 10thDay
65%6%8%14%7%
1656
11th to 20thDay
63%6%9%12%9%1
1582
21st to endDay
63%5%8%16%8%
1332
March1st to 10thDay
59%6%9%15%10%1
1942
11th to 20thDay
55%7%8%20%9%1
1980
21st to endDay
54%48%18%13%2
2178
April1st to 10thDay
59%6%11%15%9%1
2142
11th to 20thDay
52%6%9%23%9%2
2290
21st to endDay
54%5%7%17%14%2
2340
May1st to 10thDay
51%7%11%19%11%2
2447
11th to 20thDay
54%5%8%18%14%1
2482
21st to endDay
46%8%12%21%12%1
2770
June1st to 10thDay
51%7%12%21%9%1
2700
11th to 20thDay
44%8%12%22%14%1
2700
21st to endDay
49%9%12%20%9%1
2700
July1st to 10thDay
42%8%14%26%9%
2626
11th to 20thDay
42%9%15%25%9%
2619
21st to endDay
45%10%15%25%4
2650
August1st to 10thDay
47%11%17%20%5%
2314
11th to 20thDay
43%10%18%20%7%1
2303
21st to endDay
48%9%14%22%6%1
2540
September1st to 10thDay
46%9%15%22%8%
2160
11th to 20thDay
48%7%17%22%5%
2066
21st to endDay
53%7%14%21%5%
1940
October1st to 10thDay
55%6%13%18%8%1
1800
11th to 20thDay
65%7%9%14%41
1800
21st to endDay
69%8%9%10%4
1895
November1st to 10thDay
63%6%14%12%4
1486
11th to 20thDay
68%7%9%11%4
1520
21st to endDay
78%5%8%7%2
1520
December1st to 10thDay
70%6%10%10%3
1515
11th to 20thDay
65%7%9%15%3
1671
21st to endDay
78%47%9%2
2431
January1st to 10thNight
69%9%12%8%2
4748
11th to 20thNight
66%8%9%13%4
4760
21st to endNight
73%7%7%9%4
4623
February1st to 10thNight
65%7%8%13%8%
2399
11th to 20thNight
63%5%12%14%6%1
2275
21st to endNight
62%6%9%15%8%1
1924
March1st to 10thNight
61%5%9%14%9%2
2017
11th to 20thNight
60%6%10%14%9%1
1980
21st to endNight
50%6%10%16%15%4
2178
April1st to 10thNight
59%49%16%11%1
1817
11th to 20thNight
53%47%19%14%2
1633
21st to endNight
50%5%10%15%18%2
1620
May1st to 10thNight
51%6%9%19%13%3
1512
11th to 20thNight
49%7%8%20%15%2
1416
21st to endNight
42%9%13%18%16%2
1502
June1st to 10thNight
49%8%10%20%10%3
1260
11th to 20thNight
39%7%12%25%15%2
1260
21st to endNight
42%8%13%22%13%1
1260
July1st to 10thNight
36%9%16%24%14%1
1225
11th to 20thNight
38%8%14%27%13%
1218
21st to endNight
40%9%18%26%7%
1428
August1st to 10thNight
43%8%17%25%7%
1597
11th to 20thNight
38%10%19%24%8%1
1598
21st to endNight
45%8%16%23%8%1
1797
September1st to 10thNight
41%8%17%23%9%2
1800
11th to 20thNight
45%6%17%25%7%
1892
21st to endNight
45%7%16%25%7%
2020
October1st to 10thNight
52%7%12%18%10%
2160
11th to 20thNight
63%7%12%15%3
2160
21st to endNight
63%6%11%13%5%
2458
November1st to 10thNight
57%7%14%16%4
2592
11th to 20thNight
67%7%12%10%4
2660
21st to endNight
71%7%11%8%2
2660
December1st to 10thNight
74%6%8%9%3
2664
11th to 20thNight
70%6%9%11%4
3525
21st to endNight
77%45%10%3
5236

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
21%17%38%17%7%1
180
11th to 20thDay
17%17%36%21%8%1
180
21st to endDay
22%10%35%23%10%1
288
February1st to 10thDay
21%21%34%19%41
252
11th to 20thDay
22%20%32%20%5%
240
21st to endDay
25%27%36%12%1
198
March1st to 10thDay
16%16%41%21%6%
388
11th to 20thDay
19%19%31%23%8%
420
21st to endDay
23%16%33%20%7%1
462
April1st to 10thDay
23%16%30%23%8%1
420
11th to 20thDay
26%16%24%23%8%3
412
21st to endDay
28%15%26%17%10%3
420
May1st to 10thDay
25%9%30%23%10%3
423
11th to 20thDay
23%11%31%20%11%4
447
21st to endDay
19%14%33%21%12%1
530
June1st to 10thDay
20%11%32%26%9%2
630
11th to 20thDay
16%14%29%26%12%2
630
21st to endDay
18%9%26%30%13%4
630
July1st to 10thDay
15%9%30%29%14%3
621
11th to 20thDay
15%11%28%27%16%3
618
21st to endDay
11%10%27%31%16%5%
550
August1st to 10thDay
14%8%27%28%17%5%
446
11th to 20thDay
16%5%24%28%17%10%
439
21st to endDay
17%13%26%23%13%9%
495
September1st to 10thDay
18%7%30%25%16%4
450
11th to 20thDay
20%10%25%31%10%4
450
21st to endDay
26%11%25%21%14%3
450
October1st to 10thDay
26%14%26%20%12%2
450
11th to 20thDay
29%19%31%16%41
450
21st to endDay
30%17%33%16%31
419
November1st to 10thDay
33%17%37%9%3
180
11th to 20thDay
23%23%30%18%6%1
180
21st to endDay
31%18%36%10%41
180
December1st to 10thDay
23%17%32%20%8%
180
11th to 20thDay
26%16%34%14%7%2
180
21st to endDay
23%16%36%18%5%3
198
January1st to 10thNight
23%11%34%25%6%1
950
11th to 20thNight
24%11%32%25%7%
950
21st to endNight
18%9%29%30%12%1
870
February1st to 10thNight
19%11%35%27%7%
739
11th to 20thNight
21%11%35%27%5%
703
21st to endNight
19%15%35%24%7%
592
March1st to 10thNight
19%13%37%25%6%
720
11th to 20thNight
21%14%34%24%7%
720
21st to endNight
20%12%34%27%6%1
792
April1st to 10thNight
26%12%29%27%6%
720
11th to 20thNight
24%13%28%26%8%
569
21st to endNight
23%10%28%31%7%1
540
May1st to 10thNight
19%7%31%35%8%
432
11th to 20thNight
21%8%29%31%9%1
354
21st to endNight
20%6%30%38%5%1
389
June1st to 10thNight
18%8%30%36%7%
360
11th to 20thNight
19%7%29%31%13%
360
21st to endNight
17%5%27%34%16%1
360
July1st to 10thNight
15%431%40%10%
350
11th to 20thNight
18%5%22%41%14%
348
21st to endNight
14%6%23%42%15%1
394
August1st to 10thNight
13%5%26%36%17%2
533
11th to 20thNight
16%5%19%37%20%2
534
21st to endNight
21%6%25%30%17%2
609
September1st to 10thNight
18%6%29%31%15%1
720
11th to 20thNight
20%8%28%26%17%1
720
21st to endNight
22%8%26%30%13%2
720
October1st to 10thNight
27%8%31%25%9%1
720
11th to 20thNight
29%15%29%19%7%1
720
21st to endNight
32%10%30%23%5%1
792
November1st to 10thNight
25%13%34%22%6%1
740
11th to 20thNight
25%17%32%19%6%
760
21st to endNight
32%13%32%19%4
760
December1st to 10thNight
29%13%32%19%6%1
764
11th to 20thNight
27%13%31%23%5%1
950
21st to endNight
28%12%28%24%7%1
1045
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