Moose Jaw
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Moose Jaw clear sky chart from 2005-11-06 to 2024-03-23.

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
38%
24592
13%
80939
8%
24515
44%
24515
21%
53030

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
30%
936
10%
4680
5%
926
36%
926
10%
3232
January11th to 20thNight
28%
943
9%
4545
5%
930
34%
930
10%
3351
January21st to endNight
23%
1032
7%
4802
4%
1023
30%
1023
10%
2953
February1st to 10thNight
29%
884
10%
2594
6%
884
34%
884
16%
1943
February11th to 20thNight
31%
740
14%
2403
8%
740
38%
740
16%
1719
February21st to endNight
43%
628
14%
1951
10%
628
49%
628
20%
1357
March1st to 10thNight
33%
760
11%
2280
7%
760
37%
760
19%
1649
March11th to 20thNight
35%
760
16%
2151
9%
760
42%
760
23%
1478
March21st to endNight
37%
661
13%
2061
10%
661
42%
661
18%
1469
April1st to 10thNight
43%
540
16%
1800
12%
540
51%
540
26%
1087
April11th to 20thNight
32%
533
13%
1773
8%
533
39%
533
18%
1235
April21st to endNight
38%
540
14%
1449
9%
540
41%
540
23%
1043
May1st to 10thNight
46%
540
14%
1440
8%
540
49%
540
31%
934
May11th to 20thNight
48%
531
13%
1418
7%
531
50%
531
31%
908
May21st to endNight
42%
584
7%
1552
5%
582
45%
582
24%
1088
June1st to 10thNight
44%
385
7%
1128
5%
385
47%
385
29%
706
June11th to 20thNight
41%
360
5%
1080
4%
360
44%
360
25%
694
June21st to endNight
57%
360
4%
1080
4%
360
59%
360
34%
622
July1st to 10thNight
65%
350
6%
1211
7%
350
68%
350
37%
630
July11th to 20thNight
57%
374
11%
1244
7%
374
62%
374
40%
650
July21st to endNight
61%
591
18%
1488
10%
558
65%
558
52%
789
August1st to 10thNight
63%
537
18%
1424
12%
534
67%
534
44%
811
August11th to 20thNight
65%
534
21%
1460
15%
534
69%
534
46%
803
August21st to endNight
59%
594
26%
1904
21%
594
66%
594
42%
981
September1st to 10thNight
54%
540
21%
1800
21%
540
60%
540
34%
991
September11th to 20thNight
54%
540
22%
1800
21%
540
60%
540
30%
1051
September21st to endNight
44%
602
24%
2028
18%
602
54%
602
30%
1150
October1st to 10thNight
42%
720
18%
2160
12%
720
48%
720
27%
1371
October11th to 20thNight
43%
746
21%
2186
11%
746
50%
746
30%
1338
October21st to endNight
31%
990
16%
2574
6%
990
38%
990
23%
1842
November1st to 10thNight
28%
925
14%
2549
6%
925
34%
925
18%
1885
November11th to 20thNight
28%
950
14%
2660
6%
950
35%
950
18%
1973
November21st to endNight
26%
950
12%
2735
5%
950
32%
950
18%
1975
December1st to 10thNight
26%
950
10%
2850
4%
950
32%
950
15%
2144
December11th to 20thNight
24%
950
11%
3624
4%
949
32%
949
11%
2700
December21st to endNight
31%
1032
10%
5055
5%
1026
37%
1026
14%
2478

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
10%8%47%6%45%5%6%8%38%
78162
Night
8%8%48%7%45%5%6%7%39%
81676
TransparencyDay
43%8%16%23%10%1
77876
Night
43%7%16%23%10%1
81542
SeeingDay
12%9%30%29%16%4
14949
Night
12%8%32%34%13%1
24643

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 10thDay
8%11%5%9%9%5%8%7%6%5%27%
2219
11th to 20thDay
47%410%10%7%10%10%6%8%23%
2335
21st to endDay
5%10%6%9%7%46%6%6%7%36%
2794
February1st to 10thDay
8%13%6%12%9%5%7%5%5%5%25%
1603
11th to 20thDay
7%12%6%9%9%5%7%6%7%6%26%
1665
21st to endDay
5%11%6%11%11%6%7%7%6%8%24%
1503
March1st to 10thDay
8%13%8%11%8%5%6%6%5%6%23%
1900
11th to 20thDay
7%11%7%7%6%45%5%5%8%36%
2026
21st to endDay
9%11%5%9%8%5%6%6%6%7%28%
2340
April1st to 10thDay
7%9%46%6%5%6%5%6%9%37%
2160
11th to 20thDay
14%12%5%8%6%45%5%5%7%29%
2137
21st to endDay
15%9%47%6%45%446%36%
2510
May1st to 10thDay
11%8%36%5%46%5%5%8%39%
2520
11th to 20thDay
8%6%36%7%46%6%6%8%41%
2478
21st to endDay
18%6%36%6%36%5%6%8%32%
2724
June1st to 10thDay
17%6%25%6%35%5%6%9%36%
2828
11th to 20thDay
18%7%35%6%45%6%6%8%33%
2880
21st to endDay
8%5%25%5%46%5%7%9%44%
2880
July1st to 10thDay
6%4245%35%5%6%10%50%
2710
11th to 20thDay
7%4245%25%5%6%9%49%
2674
21st to endDay
431442445%9%59%
2742
August1st to 10thDay
7%3245%35%5%6%9%51%
2507
11th to 20thDay
8%425%4345%5%9%51%
2437
21st to endDay
10%42443435%8%53%
2451
September1st to 10thDay
11%4245%245%6%8%48%
2160
11th to 20thDay
13%6%26%5%24447%46%
2160
21st to endDay
13%5%244345%5%8%49%
1931
October1st to 10thDay
15%8%36%5%34446%42%
1800
11th to 20thDay
9%8%48%5%345%5%7%42%
1756
21st to endDay
9%11%5%10%6%35%45%7%34%
1782
November1st to 10thDay
12%13%6%7%6%5%5%5%46%32%
1526
11th to 20thDay
8%8%412%9%5%6%5%5%6%32%
1520
21st to endDay
9%11%5%10%8%37%5%5%6%31%
1444
December1st to 10thDay
7%12%5%10%10%5%6%6%6%5%26%
1330
11th to 20thDay
6%13%6%12%8%46%5%7%8%25%
1506
21st to endDay
7%7%47%7%35%45%6%47%
2224
January1st to 10thNight
411%5%12%10%46%6%6%6%29%
4726
11th to 20thNight
47%413%13%8%9%7%6%6%24%
4564
21st to endNight
6%12%5%8%7%45%5%6%7%36%
4873
February1st to 10thNight
7%11%6%10%8%5%7%7%6%8%26%
2594
11th to 20thNight
7%11%49%8%47%6%6%7%30%
2402
21st to endNight
47%5%10%9%5%7%6%7%7%33%
1951
March1st to 10thNight
7%10%5%10%9%45%6%6%8%30%
2280
11th to 20thNight
6%9%5%8%6%45%5%5%8%38%
2151
21st to endNight
10%11%6%8%7%36%5%5%9%31%
2061
April1st to 10thNight
8%8%46%5%35%5%5%8%44%
1800
11th to 20thNight
11%14%47%5%35%5%6%8%32%
1773
21st to endNight
13%8%38%7%5%5%45%7%35%
1449
May1st to 10thNight
14%7%24435%5%5%8%42%
1440
11th to 20thNight
10%6%25%435%5%6%10%44%
1418
21st to endNight
18%6%26%5%35%5%6%9%35%
1552
June1st to 10thNight
12%5%24436%5%7%9%44%
1128
11th to 20thNight
14%5%35%5%25%5%6%9%40%
1080
21st to endNight
7%4244445%5%10%51%
1080
July1st to 10thNight
6%414425%5%5%9%56%
1246
11th to 20thNight
6%2234245%5%9%57%
1286
21st to endNight
3323413347%66%
1576
August1st to 10thNight
6%3133246%6%7%57%
1432
11th to 20thNight
5%3243345%7%10%55%
1460
21st to endNight
8%3243245%47%59%
1904
September1st to 10thNight
10%425%4345%5%8%52%
1800
11th to 20thNight
10%5%25%5%335%5%8%50%
1800
21st to endNight
11%5%34435%45%7%50%
2028
October1st to 10thNight
14%8%3442345%7%45%
2160
11th to 20thNight
7%7%36%5%345%6%7%48%
2186
21st to endNight
9%11%5%9%7%35%46%7%36%
2574
November1st to 10thNight
14%13%48%6%35%45%6%33%
2549
11th to 20thNight
8%9%5%11%9%37%46%7%31%
2660
21st to endNight
7%11%5%10%7%45%45%8%33%
2735
December1st to 10thNight
8%11%5%12%9%5%7%6%5%6%28%
2850
11th to 20thNight
8%11%6%12%10%5%6%5%5%6%26%
3681
21st to endNight
5%7%37%5%3445%5%52%
5427

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
55%9%16%15%5%
2219
11th to 20thDay
56%9%16%14%5%1
2357
21st to endDay
47%8%17%24%5%
2794
February1st to 10thDay
61%5%11%16%7%
1603
11th to 20thDay
56%7%13%11%12%1
1674
21st to endDay
55%8%14%15%7%
1503
March1st to 10thDay
59%8%12%17%4
1900
11th to 20thDay
46%7%19%19%8%
2027
21st to endDay
52%10%17%16%5%
2340
April1st to 10thDay
43%8%16%21%12%1
2160
11th to 20thDay
54%6%14%17%7%2
2137
21st to endDay
49%6%16%20%8%1
2510
May1st to 10thDay
43%6%12%26%11%1
2520
11th to 20thDay
39%8%13%27%13%
2482
21st to endDay
49%8%14%18%10%1
2724
June1st to 10thDay
43%8%14%25%8%1
2828
11th to 20thDay
48%9%14%20%9%1
2880
21st to endDay
35%9%18%29%9%1
2880
July1st to 10thDay
27%9%21%32%10%1
2636
11th to 20thDay
29%10%18%26%15%2
2593
21st to endDay
23%6%19%35%16%2
2590
August1st to 10thDay
28%9%22%28%12%2
2491
11th to 20thDay
29%9%19%30%12%1
2437
21st to endDay
30%6%12%32%18%2
2451
September1st to 10thDay
32%7%17%26%16%2
2160
11th to 20thDay
37%7%14%28%12%2
2160
21st to endDay
33%7%13%32%14%1
1931
October1st to 10thDay
44%5%16%24%10%1
1800
11th to 20thDay
41%6%14%28%10%1
1756
21st to endDay
49%6%17%20%7%
1782
November1st to 10thDay
54%7%14%17%8%1
1526
11th to 20thDay
53%7%15%18%7%1
1520
21st to endDay
53%8%18%16%4
1444
December1st to 10thDay
57%8%15%14%5%1
1330
11th to 20thDay
56%9%21%9%6%
1507
21st to endDay
40%413%22%13%8%
2224
January1st to 10thNight
52%9%17%19%4
4726
11th to 20thNight
59%6%16%14%5%
4604
21st to endNight
46%7%19%23%4
4873
February1st to 10thNight
55%7%13%18%7%
2594
11th to 20thNight
51%7%14%17%10%1
2403
21st to endNight
46%9%15%20%10%
1951
March1st to 10thNight
50%8%18%18%6%
2280
11th to 20thNight
44%8%17%22%8%1
2151
21st to endNight
50%7%17%17%9%
2061
April1st to 10thNight
38%6%15%26%15%1
1800
11th to 20thNight
49%7%13%18%10%3
1773
21st to endNight
48%7%12%23%9%1
1449
May1st to 10thNight
38%6%14%24%16%2
1440
11th to 20thNight
36%7%14%26%15%2
1418
21st to endNight
44%9%14%21%12%1
1552
June1st to 10thNight
35%9%15%28%13%1
1128
11th to 20thNight
39%9%18%19%14%1
1080
21st to endNight
28%9%21%31%10%
1080
July1st to 10thNight
24%8%22%31%14%1
1211
11th to 20thNight
23%8%18%31%17%3
1244
21st to endNight
19%6%13%39%20%3
1488
August1st to 10thNight
23%8%19%33%15%1
1424
11th to 20thNight
22%7%21%33%15%2
1460
21st to endNight
24%5%13%32%22%3
1904
September1st to 10thNight
31%5%12%29%20%4
1800
11th to 20thNight
33%7%13%28%16%3
1800
21st to endNight
33%5%12%32%16%2
2028
October1st to 10thNight
39%5%17%24%13%1
2160
11th to 20thNight
35%6%17%28%12%2
2186
21st to endNight
48%5%15%23%7%1
2574
November1st to 10thNight
52%7%13%18%7%2
2549
11th to 20thNight
52%7%18%16%7%1
2660
21st to endNight
50%7%19%20%4
2735
December1st to 10thNight
56%7%15%17%6%
2850
11th to 20thNight
57%7%15%16%5%
3679
21st to endNight
34%5%12%27%15%7%
5427

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%29%27%16%4
180
11th to 20thDay
10%14%31%32%13%
220
21st to endDay
11%12%31%35%10%1
297
February1st to 10thDay
17%9%36%30%8%1
270
11th to 20thDay
12%7%39%27%12%3
270
21st to endDay
7%6%36%32%17%2
225
March1st to 10thDay
15%11%37%24%10%2
270
11th to 20thDay
11%12%41%21%11%3
397
21st to endDay
15%12%35%22%13%2
471
April1st to 10thDay
10%16%40%27%6%1
420
11th to 20thDay
15%17%32%25%9%2
412
21st to endDay
17%11%31%27%13%1
590
May1st to 10thDay
11%8%29%29%19%4
603
11th to 20thDay
11%8%27%32%15%7%
625
21st to endDay
16%11%23%27%18%6%
679
June1st to 10thDay
14%9%30%26%15%5%
630
11th to 20thDay
19%12%33%22%11%3
630
21st to endDay
9%7%26%33%19%6%
630
July1st to 10thDay
7%5%23%36%23%5%
621
11th to 20thDay
8%7%27%36%18%5%
618
21st to endDay
47%26%31%24%8%
684
August1st to 10thDay
10%5%20%38%21%6%
626
11th to 20thDay
9%6%21%32%25%7%
575
21st to endDay
9%7%23%34%21%6%
495
September1st to 10thDay
13%11%32%28%14%3
450
11th to 20thDay
14%9%27%32%17%1
450
21st to endDay
15%10%30%27%16%2
284
October1st to 10thDay
20%429%24%19%4
270
11th to 20thDay
12%11%33%29%12%3
270
21st to endDay
13%14%38%24%9%2
297
November1st to 10thDay
23%9%31%24%10%3
270
11th to 20thDay
13%10%38%28%10%
270
21st to endDay
10%13%39%28%9%2
270
December1st to 10thDay
12%7%43%26%10%2
270
11th to 20thDay
11%9%50%23%7%
212
21st to endDay
12%7%34%32%13%2
198
January1st to 10thNight
9%10%38%32%10%1
950
11th to 20thNight
11%13%36%32%7%1
950
21st to endNight
12%10%39%29%9%1
1045
February1st to 10thNight
10%9%34%34%11%1
884
11th to 20thNight
13%8%35%32%10%1
744
21st to endNight
5%6%29%36%20%4
628
March1st to 10thNight
11%8%35%32%13%1
760
11th to 20thNight
9%8%38%32%11%2
760
21st to endNight
13%9%28%37%11%1
661
April1st to 10thNight
10%9%32%38%10%1
540
11th to 20thNight
16%11%33%32%7%1
533
21st to endNight
16%8%31%37%8%
540
May1st to 10thNight
17%5%25%35%16%1
540
11th to 20thNight
13%6%28%35%17%2
531
21st to endNight
19%7%25%32%17%1
584
June1st to 10thNight
13%5%32%32%17%1
385
11th to 20thNight
15%7%30%35%13%
360
21st to endNight
9%5%23%43%18%1
360
July1st to 10thNight
7%319%51%19%1
350
11th to 20thNight
8%326%45%17%1
374
21st to endNight
4426%44%20%2
591
August1st to 10thNight
7%423%42%21%2
537
11th to 20thNight
6%321%42%26%2
534
21st to endNight
9%424%42%21%1
594
September1st to 10thNight
10%5%27%41%15%2
540
11th to 20thNight
11%5%24%43%16%1
540
21st to endNight
12%6%32%37%11%1
602
October1st to 10thNight
19%6%27%34%14%1
720
11th to 20thNight
11%8%30%36%14%1
746
21st to endNight
14%10%35%33%7%1
990
November1st to 10thNight
19%10%35%30%6%1
925
11th to 20thNight
12%11%36%30%9%1
950
21st to endNight
11%11%41%30%7%1
950
December1st to 10thNight
13%7%39%28%12%2
950
11th to 20thNight
12%11%38%28%11%1
950
21st to endNight
13%7%34%31%13%2
1045
Page generated at 2024-03-19 21:31:02. Version ac07

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