Moose Jaw
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Moose Jaw clear sky chart from 2005-11-05 to 2018-02-14.

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
39%
16462
13%
48768
8%
16424
44%
16424
21%
33546

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
30%
970
9%
2910
4%
970
34%
970
15%
2165
January16th to endNight
23%
1040
13%
2917
6%
1040
31%
1040
15%
2194
February1st to 15thNight
32%
836
10%
2554
7%
836
36%
836
16%
1898
February16th to endNight
39%
632
10%
1995
7%
632
43%
632
15%
1506
March1st to 15thNight
35%
720
12%
2139
7%
720
41%
720
20%
1508
March16th to endNight
33%
675
12%
2019
8%
675
38%
675
14%
1540
April1st to 15thNight
41%
539
15%
1798
10%
539
48%
539
23%
1128
April16th to endNight
39%
540
14%
1563
9%
540
43%
540
21%
1098
May1st to 15thNight
44%
539
12%
1440
6%
539
47%
539
29%
953
May16th to endNight
40%
563
8%
1498
5%
561
42%
561
22%
1073
June1st to 15thNight
40%
376
4%
1111
3%
376
43%
376
25%
721
June16th to endNight
50%
360
3%
1080
3%
360
52%
360
29%
668
July1st to 15thNight
65%
340
5%
1181
5%
340
67%
340
35%
630
July16th to endNight
62%
523
15%
1375
9%
490
65%
490
47%
741
August1st to 15thNight
66%
539
16%
1432
11%
536
69%
536
44%
824
August16th to endNight
62%
573
25%
1765
19%
573
67%
573
43%
916
September1st to 15thNight
57%
540
18%
1800
18%
540
62%
540
32%
1020
September16th to endNight
50%
579
25%
1953
22%
579
59%
579
32%
1101
October1st to 15thNight
41%
720
19%
2160
11%
720
47%
720
27%
1366
October16th to endNight
37%
918
19%
2454
8%
918
44%
918
25%
1691
November1st to 15thNight
31%
950
14%
2633
6%
950
37%
950
20%
1902
November16th to endNight
28%
975
12%
2781
6%
975
34%
975
17%
2080
December1st to 15thNight
25%
975
6%
2941
3%
975
28%
975
11%
2363
December16th to endNight
30%
1040
11%
3269
5%
1040
36%
1040
13%
2460

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
11%8%36%6%35%5%5%7%35%
49334
Night
9%8%47%6%35%45%7%36%
48926
Cloud CoverDay
11%8%46%6%35%5%5%7%35%
49335
Night
9%8%47%6%35%5%5%7%36%
48928
TransparencyDay
46%7%16%21%7%
48996
Night
45%7%15%21%9%
48768
SeeingDay
14%8%28%28%16%3
6612
Night
13%7%30%33%13%1
16476

By Month

Percentage Cloud Cover NW (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
8%10%5%11%7%5%6%6%5%6%25%
1358
16th to endDay
412%5%10%8%47%5%5%7%27%
1658
February1st to 15thDay
8%12%6%11%10%5%8%45%422%
1620
16th to endDay
8%14%6%11%10%5%5%6%6%5%19%
1479
March1st to 15thDay
7%13%8%10%8%5%5%5%5%6%23%
1821
16th to endDay
11%11%5%8%7%46%6%6%7%25%
2204
April1st to 15thDay
10%8%47%6%46%46%8%32%
2150
16th to endDay
16%10%47%5%44445%31%
2397
May1st to 15thDay
12%7%345%35%6%5%6%38%
2511
16th to endDay
19%6%36%6%35%5%6%8%30%
2616
June1st to 15thDay
20%6%25%6%345%47%31%
2847
16th to endDay
12%6%25%5%35%5%7%8%38%
2880
July1st to 15thDay
8%4145%25%46%9%47%
2706
16th to endDay
5%31342445%9%54%
2698
August1st to 15thDay
9%425%4245%5%8%45%
2520
16th to endDay
9%313324347%54%
2433
September1st to 15thDay
13%424414447%48%
2160
16th to endDay
12%413414448%48%
2007
October1st to 15thDay
15%9%36%5%23445%39%
1800
16th to endDay
11%11%47%5%24447%36%
1758
November1st to 15thDay
9%10%5%6%6%45%347%36%
1554
16th to endDay
11%10%39%7%47%5%45%30%
1508
December1st to 15thDay
7%15%6%12%10%5%7%6%45%17%
1345
16th to endDay
9%12%6%10%9%5%7%5%5%7%19%
1304
January1st to 15thNight
6%11%5%9%8%46%5%6%7%27%
2910
16th to endNight
5%12%5%10%9%45%5%6%7%28%
2917
February1st to 15thNight
7%10%6%9%8%46%5%47%28%
2543
16th to endNight
8%10%5%10%8%46%5%5%7%26%
1995
March1st to 15thNight
7%8%5%7%7%36%6%6%8%33%
2139
16th to endNight
12%11%5%9%7%35%5%47%26%
2016
April1st to 15thNight
9%7%45%425%5%5%8%41%
1798
16th to endNight
11%10%47%6%34446%35%
1563
May1st to 15thNight
13%7%24425%45%9%41%
1439
16th to endNight
18%6%26%425%46%8%34%
1498
June1st to 15thNight
14%5%14426%46%7%41%
1111
16th to endNight
10%425%42445%9%45%
1080
July1st to 15thNight
431442445%9%53%
1251
16th to endNight
421331335%8%61%
1470
August1st to 15thNight
6%2133245%6%8%55%
1440
16th to endNight
7%214213347%59%
1765
September1st to 15thNight
10%325%333447%50%
1800
16th to endNight
10%5%13323447%51%
1953
October1st to 15thNight
12%8%2442335%6%45%
2160
16th to endNight
8%9%47%6%25%46%6%38%
2454
November1st to 15thNight
12%10%38%5%3435%6%36%
2633
16th to endNight
9%11%5%8%7%45%45%7%30%
2781
December1st to 15thNight
11%13%6%12%8%45%5%46%20%
2941
16th to endNight
6%11%5%11%8%46%5%6%6%24%
3269

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
8%10%5%11%7%5%6%6%47%25%
1358
16th to endDay
5%12%6%10%8%5%7%5%6%6%27%
1658
February1st to 15thDay
7%12%7%10%11%5%8%5%5%5%22%
1620
16th to endDay
8%14%6%11%10%46%6%6%5%19%
1479
March1st to 15thDay
8%13%7%10%8%5%5%5%5%7%23%
1821
16th to endDay
11%12%5%8%7%36%6%6%7%25%
2205
April1st to 15thDay
10%8%5%7%5%45%5%6%8%32%
2150
16th to endDay
16%11%47%6%35%445%30%
2397
May1st to 15thDay
12%7%35%6%45%5%5%6%37%
2511
16th to endDay
19%6%36%6%35%5%6%8%30%
2616
June1st to 15thDay
20%6%35%6%35%5%5%7%31%
2847
16th to endDay
12%5%245%36%5%6%9%37%
2880
July1st to 15thDay
8%32443446%8%47%
2706
16th to endDay
5%32442445%9%53%
2698
August1st to 15thDay
9%424425%5%6%8%45%
2520
16th to endDay
9%313423347%54%
2433
September1st to 15thDay
14%424413447%48%
2160
16th to endDay
12%5%14324448%48%
2007
October1st to 15thDay
15%10%45%423346%39%
1800
16th to endDay
11%10%47%5%23447%36%
1758
November1st to 15thDay
9%10%5%7%6%44446%36%
1554
16th to endDay
11%11%48%7%47%445%30%
1508
December1st to 15thDay
7%15%6%12%10%5%7%6%5%417%
1345
16th to endDay
9%12%7%10%9%5%7%5%47%19%
1304
January1st to 15thNight
6%11%5%9%7%46%6%6%7%28%
2910
16th to endNight
5%12%5%10%9%45%5%6%7%27%
2917
February1st to 15thNight
7%10%6%9%8%46%5%47%28%
2543
16th to endNight
8%10%5%11%8%47%6%5%7%25%
1995
March1st to 15thNight
7%8%5%7%7%26%6%6%8%33%
2139
16th to endNight
12%10%6%9%6%45%5%47%26%
2019
April1st to 15thNight
9%7%45%425%5%5%8%41%
1798
16th to endNight
11%10%5%6%6%35%45%6%35%
1563
May1st to 15thNight
13%7%24435%45%8%40%
1439
16th to endNight
17%6%25%5%3446%8%34%
1497
June1st to 15thNight
14%5%14435%46%8%41%
1111
16th to endNight
10%415%43445%9%45%
1080
July1st to 15thNight
43134245%6%9%52%
1251
16th to endNight
421331335%8%60%
1470
August1st to 15thNight
6%3123245%7%7%55%
1440
16th to endNight
7%323223446%59%
1765
September1st to 15thNight
10%325%333447%50%
1800
16th to endNight
10%423324447%52%
1953
October1st to 15thNight
12%8%2442335%7%44%
2160
16th to endNight
8%9%37%6%2446%6%39%
2454
November1st to 15thNight
12%10%38%6%34446%35%
2633
16th to endNight
9%11%5%8%7%45%5%5%7%30%
2781
December1st to 15thNight
11%13%6%11%8%45%45%6%20%
2941
16th to endNight
6%11%6%11%9%46%6%5%7%23%
3269

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
56%8%13%16%5%
1358
16th to endDay
54%9%14%15%5%
1658
February1st to 15thDay
63%6%12%13%4
1620
16th to endDay
63%8%12%10%6%
1479
March1st to 15thDay
58%8%16%13%2
1821
16th to endDay
55%9%16%14%3
2205
April1st to 15thDay
48%7%17%18%7%
2150
16th to endDay
55%5%14%16%6%1
2397
May1st to 15thDay
44%6%12%25%10%
2511
16th to endDay
51%7%13%16%9%
2620
June1st to 15thDay
51%7%14%19%6%
2847
16th to endDay
41%8%18%24%5%
2880
July1st to 15thDay
31%8%20%28%10%
2547
16th to endDay
27%8%19%30%12%1
2530
August1st to 15thDay
33%9%22%24%8%1
2504
16th to endDay
29%6%14%33%13%2
2433
September1st to 15thDay
35%6%15%25%15%1
2160
16th to endDay
33%6%13%32%11%1
2007
October1st to 15thDay
46%5%15%24%8%
1800
16th to endDay
47%6%17%22%5%
1758
November1st to 15thDay
49%6%16%19%7%
1554
16th to endDay
55%8%17%15%3
1508
December1st to 15thDay
67%8%12%9%2
1345
16th to endDay
62%6%16%10%3
1304
January1st to 15thNight
52%8%16%16%4
2910
16th to endNight
53%7%16%15%6%
2917
February1st to 15thNight
54%6%14%17%6%
2554
16th to endNight
55%8%14%14%6%
1995
March1st to 15thNight
46%8%19%19%5%
2139
16th to endNight
56%7%14%15%5%
2019
April1st to 15thNight
40%6%16%23%11%1
1798
16th to endNight
48%6%13%18%10%3
1563
May1st to 15thNight
40%5%14%23%15%1
1440
16th to endNight
46%8%12%18%12%1
1498
June1st to 15thNight
40%7%16%22%11%
1111
16th to endNight
34%8%21%27%7%
1080
July1st to 15thNight
25%8%21%30%12%1
1181
16th to endNight
21%6%15%37%17%2
1375
August1st to 15thNight
24%7%21%34%11%
1432
16th to endNight
23%414%31%21%3
1765
September1st to 15thNight
33%411%28%19%2
1800
16th to endNight
31%5%11%31%17%1
1953
October1st to 15thNight
38%5%16%26%11%
2160
16th to endNight
44%5%17%23%7%1
2454
November1st to 15thNight
49%6%15%17%8%1
2633
16th to endNight
52%7%18%16%4
2781
December1st to 15thNight
63%7%14%12%1
2941
16th to endNight
57%6%14%15%6%
3269

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
11%10%14%37%24%2
90
16th to endDay
12%13%31%32%9%
143
February1st to 15thDay
15%343%30%7%
130
16th to endDay
20%435%28%7%2
81
March1st to 15thDay
21%9%40%20%6%1
111
16th to endDay
20%10%41%17%9%
288
April1st to 15thDay
14%18%37%21%6%1
269
16th to endDay
20%10%27%25%16%
384
May1st to 15thDay
13%8%30%30%13%2
468
16th to endDay
17%9%21%28%14%8%
517
June1st to 15thDay
17%8%30%24%14%4
495
16th to endDay
12%9%28%31%14%3
495
July1st to 15thDay
9%420%34%26%5%
475
16th to endDay
4427%35%24%3
515
August1st to 15thDay
10%419%33%24%7%
493
16th to endDay
10%6%21%31%23%6%
364
September1st to 15thDay
17%9%25%29%15%2
315
16th to endDay
13%7%24%29%23%1
204
October1st to 15thDay
26%8%27%22%11%3
135
16th to endDay
21%10%29%26%11%1
144
November1st to 15thDay
13%237%30%14%1
135
16th to endDay
14%12%33%26%11%1
135
December1st to 15thDay
13%248%22%8%4
130
16th to endDay
12%9%54%11%12%
96
January1st to 15thNight
12%9%34%31%10%
975
16th to endNight
11%11%38%28%7%1
1040
February1st to 15thNight
11%7%32%34%12%1
844
16th to endNight
11%5%27%34%17%3
632
March1st to 15thNight
10%6%36%31%13%1
720
16th to endNight
15%8%28%34%11%
675
April1st to 15thNight
12%9%30%37%9%
539
16th to endNight
17%8%27%35%10%
540
May1st to 15thNight
17%5%26%34%15%1
540
16th to endNight
20%6%26%29%15%1
563
June1st to 15thNight
16%431%32%13%1
376
16th to endNight
11%5%25%38%18%
360
July1st to 15thNight
7%219%48%20%2
340
16th to endNight
5%224%43%21%1
523
August1st to 15thNight
8%218%39%27%2
539
16th to endNight
9%221%41%23%1
573
September1st to 15thNight
11%223%39%20%1
540
16th to endNight
12%427%39%14%1
579
October1st to 15thNight
17%6%29%30%14%1
720
16th to endNight
14%7%31%35%10%
918
November1st to 15thNight
16%9%33%29%9%1
950
16th to endNight
13%11%36%31%6%
975
December1st to 15thNight
17%6%34%27%12%2
975
16th to endNight
11%8%34%29%14%2
1040
Page generated at 2018-02-15 09:58:44. Version ac04

Copyright 2018 A. Danko


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