Wyndham Caresland Provincial Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Wyndham Caresland Provincial Park clear sky chart from 2005-11-05 to 2017-09-18.

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
42%
15217
14%
46799
9%
15190
47%
15190
23%
31130

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
33%
896
12%
2685
8%
895
37%
895
16%
1981
January16th to endNight
35%
828
18%
2748
12%
828
43%
828
20%
1818
February1st to 15thNight
42%
698
14%
2395
13%
696
47%
696
19%
1583
February16th to endNight
41%
632
13%
1989
11%
632
46%
632
18%
1412
March1st to 15thNight
32%
720
13%
2103
7%
720
39%
720
20%
1488
March16th to endNight
32%
768
10%
2106
3%
768
37%
768
18%
1580
April1st to 15thNight
35%
616
11%
1696
6%
616
38%
616
19%
1261
April16th to endNight
39%
540
14%
1620
9%
540
44%
540
21%
1115
May1st to 15thNight
44%
444
12%
1429
11%
444
48%
444
25%
900
May16th to endNight
43%
374
5%
1309
3%
374
44%
374
17%
899
June1st to 15thNight
45%
360
1%
1260
0%
360
45%
360
17%
878
June16th to endNight
53%
360
1%
1260
0%
360
53%
360
25%
759
July1st to 15thNight
63%
340
2%
1190
0%
340
63%
340
29%
671
July16th to endNight
61%
376
11%
1268
11%
354
66%
354
35%
662
August1st to 15thNight
64%
420
12%
1492
14%
418
66%
418
29%
848
August16th to endNight
61%
573
23%
1719
19%
573
64%
573
42%
920
September1st to 15thNight
54%
647
18%
1808
13%
647
57%
647
35%
1093
September16th to endNight
53%
667
21%
1847
13%
667
57%
667
39%
1084
October1st to 15thNight
44%
660
18%
1937
10%
660
51%
660
24%
1301
October16th to endNight
44%
704
20%
2288
12%
704
54%
704
27%
1412
November1st to 15thNight
34%
834
19%
2409
10%
834
42%
834
24%
1631
November16th to endNight
34%
900
14%
2661
8%
900
39%
900
23%
1779
December1st to 15thNight
37%
900
12%
2700
9%
900
40%
900
18%
1970
December16th to endNight
33%
960
15%
2880
8%
960
39%
960
19%
2085

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%36%6%35%5%6%8%35%
48028
Night
8%9%37%6%35%5%6%8%35%
46949
Cloud CoverDay
10%8%36%5%35%5%5%8%36%
48029
Night
8%9%47%6%35%5%6%8%36%
46952
TransparencyDay
44%5%15%23%8%1
47681
Night
44%5%15%21%9%1
46800
SeeingDay
14%7%25%29%17%5%
6027
Night
12%5%29%34%16%2
15229

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
9%10%48%6%45%46%7%33%
1253
16th to endDay
7%9%49%7%35%6%6%7%31%
1485
February1st to 15thDay
8%10%5%7%7%36%5%5%8%29%
1467
16th to endDay
411%9%9%6%46%48%7%26%
1482
March1st to 15thDay
5%11%5%8%7%36%5%6%8%31%
1856
16th to endDay
10%13%5%7%6%445%5%8%27%
2114
April1st to 15thDay
12%11%5%8%6%35%5%6%7%26%
2251
16th to endDay
14%10%37%6%35%5%5%6%30%
2340
May1st to 15thDay
12%8%36%5%35%449%35%
2520
16th to endDay
20%7%26%6%35%5%5%8%27%
2802
June1st to 15thDay
18%7%25%6%45%6%5%7%30%
2700
16th to endDay
13%5%25%5%36%5%7%8%35%
2700
July1st to 15thDay
8%424435%6%7%9%43%
2700
16th to endDay
6%3134345%7%10%49%
2813
August1st to 15thDay
10%5%25%4245%6%8%43%
2460
16th to endDay
9%2144245%5%9%50%
2483
September1st to 15thDay
13%6%24423445%49%
2150
16th to endDay
10%5%2344435%8%46%
1838
October1st to 15thDay
15%8%37%6%24447%34%
1692
16th to endDay
6%8%37%6%35%5%6%7%38%
1584
November1st to 15thDay
9%10%48%5%45%46%7%32%
1438
16th to endDay
6%11%48%6%35%36%8%34%
1296
December1st to 15thDay
5%13%6%11%8%37%6%5%6%24%
1260
16th to endDay
5%10%410%7%35%6%7%10%27%
1344
January1st to 15thNight
5%11%5%9%8%46%6%5%9%25%
2685
16th to endNight
5%11%5%7%6%345%7%9%33%
2748
February1st to 15thNight
7%11%48%5%45%5%48%34%
2385
16th to endNight
5%10%6%10%8%35%5%5%8%28%
1989
March1st to 15thNight
412%48%7%46%5%7%9%29%
2103
16th to endNight
8%12%5%9%6%46%5%6%8%26%
2103
April1st to 15thNight
11%12%48%6%35%5%6%7%28%
1696
16th to endNight
11%10%47%5%335%5%9%33%
1620
May1st to 15thNight
10%8%36%4335%5%8%39%
1428
16th to endNight
19%7%35%5%435%6%8%30%
1309
June1st to 15thNight
14%7%37%7%46%7%5%7%30%
1260
16th to endNight
11%325%5%26%6%6%9%40%
1260
July1st to 15thNight
7%4235%445%6%10%45%
1260
16th to endNight
5%3143145%7%7%53%
1354
August1st to 15thNight
7%425%4245%7%10%44%
1500
16th to endNight
8%32322345%7%55%
1719
September1st to 15thNight
13%424313447%49%
1808
16th to endNight
9%4144235%5%8%50%
1847
October1st to 15thNight
12%8%36%5%445%5%8%36%
1937
16th to endNight
8%8%26%3345%7%8%40%
2288
November1st to 15thNight
6%11%36%6%36%5%5%7%38%
2409
16th to endNight
6%11%48%5%2446%8%34%
2661
December1st to 15thNight
5%11%5%10%7%47%5%7%6%28%
2700
16th to endNight
411%5%11%8%46%6%5%6%28%
2880

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
9%10%37%6%46%5%5%7%33%
1253
16th to endDay
6%10%49%7%36%5%7%8%31%
1485
February1st to 15thDay
8%11%47%7%35%5%5%7%30%
1467
16th to endDay
5%11%9%9%6%36%6%7%7%26%
1482
March1st to 15thDay
5%11%5%8%7%36%5%5%6%32%
1856
16th to endDay
10%13%5%7%6%35%5%6%7%27%
2115
April1st to 15thDay
11%11%48%6%36%5%5%7%27%
2251
16th to endDay
15%9%46%6%35%5%5%7%31%
2340
May1st to 15thDay
13%7%35%5%35%5%48%36%
2520
16th to endDay
20%7%35%5%345%5%8%28%
2802
June1st to 15thDay
18%7%25%6%45%5%6%7%31%
2700
16th to endDay
13%5%25%5%35%6%6%9%36%
2700
July1st to 15thDay
8%415%435%6%6%10%43%
2700
16th to endDay
6%2124345%7%10%50%
2813
August1st to 15thDay
10%435%4345%6%8%44%
2460
16th to endDay
8%3144245%5%8%50%
2483
September1st to 15thDay
13%5%24423335%50%
2150
16th to endDay
10%5%245%2445%8%46%
1838
October1st to 15thDay
14%8%28%5%2445%7%35%
1692
16th to endDay
7%8%36%6%35%5%6%7%38%
1584
November1st to 15thDay
9%11%5%7%5%35%5%5%8%32%
1438
16th to endDay
6%11%5%6%6%35%46%9%34%
1296
December1st to 15thDay
6%14%5%11%8%46%5%5%6%24%
1260
16th to endDay
5%10%410%7%36%7%6%10%28%
1344
January1st to 15thNight
6%10%6%9%8%47%6%5%8%25%
2685
16th to endNight
5%11%5%7%5%35%5%7%9%33%
2748
February1st to 15thNight
7%9%5%8%5%45%45%8%34%
2385
16th to endNight
5%11%6%9%7%45%6%5%8%29%
1989
March1st to 15thNight
411%5%8%7%46%5%7%9%29%
2103
16th to endNight
8%12%5%9%5%46%5%6%8%26%
2106
April1st to 15thNight
11%11%5%7%6%35%5%6%7%28%
1696
16th to endNight
11%10%37%5%25%5%5%8%34%
1620
May1st to 15thNight
11%7%46%5%2445%8%39%
1428
16th to endNight
20%5%35%5%445%5%8%31%
1309
June1st to 15thNight
13%7%37%7%46%6%5%7%30%
1260
16th to endNight
11%325%5%35%6%8%8%40%
1260
July1st to 15thNight
8%3145%25%5%6%9%46%
1260
16th to endNight
6%3144245%6%9%52%
1354
August1st to 15thNight
7%415%5%3447%9%46%
1500
16th to endNight
8%41322345%7%55%
1719
September1st to 15thNight
13%41442335%7%49%
1808
16th to endNight
10%443245%6%8%50%
1847
October1st to 15thNight
12%7%46%5%3446%7%36%
1937
16th to endNight
8%8%26%4245%7%8%40%
2288
November1st to 15thNight
5%10%36%6%45%5%5%8%38%
2409
16th to endNight
6%11%47%6%345%6%8%34%
2661
December1st to 15thNight
5%12%5%9%7%46%5%6%7%28%
2700
16th to endNight
5%11%6%10%8%46%5%5%7%28%
2880

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
48%5%14%22%6%1
1253
16th to endDay
47%6%14%17%10%3
1485
February1st to 15thDay
50%6%15%18%6%1
1467
16th to endDay
52%5%15%19%7%
1482
March1st to 15thDay
49%6%18%18%6%
1856
16th to endDay
54%6%14%19%5%
2115
April1st to 15thDay
54%6%14%17%7%1
2251
16th to endDay
52%413%19%9%1
2340
May1st to 15thDay
46%315%23%10%
2520
16th to endDay
53%5%13%20%5%
2807
June1st to 15thDay
51%6%13%19%6%1
2700
16th to endDay
43%7%17%24%7%1
2700
July1st to 15thDay
34%8%20%27%8%1
2541
16th to endDay
28%7%20%29%12%1
2636
August1st to 15thDay
36%6%22%27%6%1
2443
16th to endDay
29%419%31%12%1
2483
September1st to 15thDay
36%313%24%16%5%
2150
16th to endDay
35%5%11%32%11%3
1838
October1st to 15thDay
47%5%13%23%8%1
1692
16th to endDay
41%6%13%28%7%1
1584
November1st to 15thDay
48%5%13%22%7%1
1438
16th to endDay
46%5%17%20%8%1
1296
December1st to 15thDay
58%5%13%15%6%
1260
16th to endDay
48%6%15%20%8%
1344
January1st to 15thNight
53%6%14%17%5%2
2685
16th to endNight
45%5%15%19%10%3
2748
February1st to 15thNight
47%414%21%10%1
2396
16th to endNight
52%5%11%19%10%
1989
March1st to 15thNight
48%6%17%20%5%
2103
16th to endNight
53%7%13%17%7%
2106
April1st to 15thNight
53%6%13%16%10%
1696
16th to endNight
48%413%22%8%1
1620
May1st to 15thNight
42%414%25%12%
1429
16th to endNight
50%6%17%18%5%1
1309
June1st to 15thNight
51%5%15%17%8%
1260
16th to endNight
37%7%21%24%8%
1260
July1st to 15thNight
32%7%22%26%10%
1190
16th to endNight
26%7%19%32%13%2
1268
August1st to 15thNight
32%7%21%26%10%
1492
16th to endNight
26%316%32%17%3
1719
September1st to 15thNight
34%413%24%17%5%
1808
16th to endNight
30%5%17%26%15%4
1847
October1st to 15thNight
44%5%14%21%12%1
1937
16th to endNight
37%6%18%26%10%
2288
November1st to 15thNight
43%6%13%22%12%1
2409
16th to endNight
44%6%20%16%9%2
2661
December1st to 15thNight
53%6%15%19%5%
2700
16th to endNight
53%5%13%20%6%
2880

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
13%5%16%30%18%16%
60
16th to endDay
12%9%21%28%14%14%
64
February1st to 15thDay
22%5%22%30%18%1
72
16th to endDay
11%7%24%43%12%
141
March1st to 15thDay
12%13%41%25%6%
270
16th to endDay
11%15%37%20%12%2
288
April1st to 15thDay
16%15%26%28%10%1
269
16th to endDay
21%7%28%28%13%1
270
May1st to 15thDay
16%7%27%24%19%5%
384
16th to endDay
24%417%25%21%5%
517
June1st to 15thDay
19%5%22%33%17%2
495
16th to endDay
14%426%30%17%5%
495
July1st to 15thDay
10%5%17%32%28%6%
475
16th to endDay
8%6%25%33%20%5%
482
August1st to 15thDay
12%219%33%24%8%
315
16th to endDay
9%6%24%32%17%10%
332
September1st to 15thDay
20%5%21%29%17%6%
315
16th to endDay
12%11%24%29%16%5%
264
October1st to 15thDay
19%9%21%26%19%2
143
16th to endDay
8%227%35%22%4
96
November1st to 15thDay
16%12%28%26%11%4
90
16th to endDay
7%6%28%27%15%15%
66
December1st to 15thDay
6%5%50%25%11%1
60
16th to endDay
10%32%26%21%7%
64
January1st to 15thNight
11%9%32%32%12%2
900
16th to endNight
11%8%33%31%13%1
828
February1st to 15thNight
12%7%25%33%17%3
704
16th to endNight
10%5%26%36%17%3
632
March1st to 15thNight
9%6%38%30%13%1
720
16th to endNight
14%6%32%33%10%2
768
April1st to 15thNight
16%5%32%30%13%1
616
16th to endNight
17%5%27%32%14%
540
May1st to 15thNight
14%326%35%17%1
445
16th to endNight
22%322%30%19%1
375
June1st to 15thNight
18%5%22%34%16%1
360
16th to endNight
12%321%41%18%2
360
July1st to 15thNight
8%216%45%27%
340
16th to endNight
9%121%43%22%1
376
August1st to 15thNight
10%117%36%31%2
420
16th to endNight
9%320%41%24%1
573
September1st to 15thNight
16%219%34%23%2
647
16th to endNight
10%327%35%19%2
667
October1st to 15thNight
16%5%25%33%17%2
660
16th to endNight
12%430%36%14%1
704
November1st to 15thNight
11%8%38%30%8%1
834
16th to endNight
12%6%37%31%10%2
900
December1st to 15thNight
10%7%29%35%13%2
900
16th to endNight
10%435%32%13%3
960
Page generated at 2017-09-19 05:32:33. Version ac04

Copyright 2017 A. Danko


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