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 2005-11-06 to 2024-01-12.

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 Type	Minimum conditions for hour to be usable				Out of hours
	Clear of Clouds	Transparency	Seeing	Sky Brightness
Planetary:	50%	(no limit)	Average	(no limit)	Nighttime Hours
Deep Sky:	70%	Average	(no limit)	5.9	Nighttime Hours
CCD Imaging:	70%	Below Average	Poor	(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

By Month

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 Forecast	Data Points
Cloud Cover	Day	9% 8% 3 7% 6% 4 5% 5% 6% 8% 38%	74619
	Night	7% 9% 4 7% 6% 4 5% 6% 6% 8% 37%	75092
Transparency	Day	43% 6% 15% 24% 11% 2	74303
	Night	43% 6% 15% 23% 12% 2	74926
Seeing	Day	13% 7% 25% 30% 19% 6%	14225
	Night	12% 6% 30% 35% 15% 2	23500

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
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	6% 10% 5% 9% 6% 5% 5% 5% 7% 8% 34%	1329
	11th to 20th	Day	6% 8% 5% 9% 8% 4 6% 5% 7% 8% 34%	1281
	21st to end	Day	6% 10% 5% 9% 8% 3 6% 7% 7% 8% 30%	1584
February	1st to 10th	Day	5% 9% 6% 10% 9% 5% 8% 6% 6% 8% 28%	1458
	11th to 20th	Day	7% 12% 6% 9% 7% 5% 6% 6% 7% 8% 27%	1575
	21st to end	Day	4 11% 9% 10% 7% 5% 6% 4 8% 8% 29%	1422
March	1st to 10th	Day	5% 11% 6% 10% 9% 4 6% 6% 6% 7% 31%	1800
	11th to 20th	Day	7% 9% 4 7% 7% 4 5% 6% 6% 9% 36%	1973
	21st to end	Day	9% 13% 5% 8% 6% 4 5% 5% 7% 8% 29%	2182
April	1st to 10th	Day	9% 11% 5% 10% 7% 4 5% 6% 6% 7% 29%	2223
	11th to 20th	Day	11% 11% 3 8% 7% 4 6% 5% 6% 8% 31%	2310
	21st to end	Day	12% 11% 3 8% 7% 3 5% 6% 5% 8% 32%	2340
May	1st to 10th	Day	14% 10% 4 7% 7% 4 6% 5% 5% 8% 31%	2441
	11th to 20th	Day	11% 6% 3 6% 7% 4 6% 5% 6% 10% 36%	2654
	21st to end	Day	20% 7% 3 6% 6% 4 5% 5% 5% 8% 32%	2917
June	1st to 10th	Day	16% 7% 2 6% 6% 4 5% 7% 7% 8% 32%	2700
	11th to 20th	Day	19% 7% 3 6% 6% 4 6% 6% 6% 7% 29%	2700
	21st to end	Day	8% 5% 2 5% 5% 3 5% 6% 8% 10% 43%	2700
July	1st to 10th	Day	8% 4 2 5% 5% 4 6% 6% 7% 9% 44%	2700
	11th to 20th	Day	9% 5% 2 5% 4 3 5% 5% 6% 9% 47%	2700
	21st to end	Day	5% 3 1 3 4 2 4 5% 7% 10% 56%	2889
August	1st to 10th	Day	8% 5% 2 5% 5% 3 4 5% 6% 9% 47%	2507
	11th to 20th	Day	8% 4 2 4 4 2 5% 5% 6% 9% 50%	2299
	21st to end	Day	10% 4 2 3 4 3 4 5% 5% 9% 51%	2574
September	1st to 10th	Day	9% 6% 2 5% 5% 3 4 4 5% 6% 51%	2235
	11th to 20th	Day	15% 7% 3 4 3 3 4 4 5% 7% 45%	1980
	21st to end	Day	9% 7% 2 5% 5% 4 4 4 5% 8% 46%	1980
October	1st to 10th	Day	13% 9% 3 6% 6% 3 4 5% 5% 7% 40%	1888
	11th to 20th	Day	9% 8% 2 8% 6% 4 5% 5% 6% 7% 40%	1692
	21st to end	Day	7% 10% 3 7% 6% 3 6% 6% 6% 8% 37%	1782
November	1st to 10th	Day	10% 14% 6% 8% 5% 4 5% 5% 5% 8% 30%	1538
	11th to 20th	Day	7% 10% 3 8% 6% 3 5% 4 6% 8% 39%	1482
	21st to end	Day	5% 9% 6% 8% 5% 5% 5% 5% 8% 10% 34%	1330
December	1st to 10th	Day	5% 12% 6% 10% 7% 4 7% 5% 5% 7% 33%	1330
	11th to 20th	Day	4 11% 5% 12% 8% 4 5% 6% 7% 7% 32%	1682
	21st to end	Day	4 8% 3 6% 6% 3 5% 5% 6% 10% 43%	2442
January	1st to 10th	Night	4 11% 5% 10% 9% 4 7% 7% 6% 10% 27%	2836
	11th to 20th	Night	5% 9% 5% 9% 7% 5% 5% 6% 7% 10% 31%	2722
	21st to end	Night	5% 12% 5% 8% 7% 3 6% 5% 7% 8% 33%	2772
February	1st to 10th	Night	5% 10% 5% 11% 7% 5% 7% 6% 5% 9% 31%	2501
	11th to 20th	Night	6% 13% 5% 10% 7% 4 6% 6% 7% 8% 28%	2272
	21st to end	Night	4 10% 6% 10% 9% 4 6% 5% 6% 8% 32%	1830
March	1st to 10th	Night	5% 11% 4 10% 9% 4 6% 5% 7% 9% 30%	2160
	11th to 20th	Night	6% 11% 5% 8% 6% 5% 5% 5% 5% 9% 34%	1985
	21st to end	Night	7% 12% 5% 9% 7% 4 6% 6% 7% 9% 29%	2171
April	1st to 10th	Night	8% 12% 5% 10% 6% 4 5% 6% 6% 9% 30%	1736
	11th to 20th	Night	10% 13% 4 9% 6% 4 5% 4 6% 7% 32%	1601
	21st to end	Night	10% 11% 4 8% 7% 4 4 6% 5% 9% 32%	1620
May	1st to 10th	Night	11% 10% 4 7% 5% 4 5% 6% 6% 9% 33%	1514
	11th to 20th	Night	11% 7% 2 5% 5% 3 4 6% 6% 9% 41%	1239
	21st to end	Night	18% 6% 4 6% 5% 4 5% 5% 7% 8% 32%	1358
June	1st to 10th	Night	14% 7% 3 6% 7% 4 6% 7% 6% 8% 32%	1260
	11th to 20th	Night	16% 6% 3 7% 7% 4 6% 6% 7% 9% 31%	1260
	21st to end	Night	7% 4 2 5% 5% 3 6% 7% 6% 9% 46%	1260
July	1st to 10th	Night	8% 5% 2 4 5% 3 5% 5% 6% 10% 47%	1260
	11th to 20th	Night	7% 5% 2 4 4 3 4 6% 8% 10% 47%	1260
	21st to end	Night	4 4 1 4 4 2 5% 5% 7% 8% 57%	1425
August	1st to 10th	Night	8% 5% 2 6% 5% 4 5% 5% 6% 9% 46%	1432
	11th to 20th	Night	8% 3 2 4 4 2 4 5% 7% 10% 50%	1602
	21st to end	Night	9% 4 2 4 3 2 4 5% 6% 8% 52%	1782
September	1st to 10th	Night	10% 5% 3 5% 4 3 4 5% 6% 8% 47%	1722
	11th to 20th	Night	13% 7% 2 5% 4 2 3 4 5% 7% 49%	1980
	21st to end	Night	9% 6% 2 4 4 3 4 5% 7% 8% 47%	1980
October	1st to 10th	Night	11% 8% 3 5% 5% 4 4 6% 6% 8% 41%	2071
	11th to 20th	Night	9% 7% 3 6% 5% 3 5% 6% 6% 9% 42%	2268
	21st to end	Night	7% 10% 4 8% 5% 4 5% 5% 7% 8% 37%	2574
November	1st to 10th	Night	9% 14% 4 7% 6% 4 5% 5% 6% 8% 34%	2522
	11th to 20th	Night	5% 10% 4 7% 6% 4 5% 6% 7% 7% 38%	2693
	21st to end	Night	5% 10% 4 8% 5% 3 5% 5% 7% 9% 38%	2850
December	1st to 10th	Night	4 12% 5% 9% 6% 4 6% 6% 6% 7% 34%	2850
	11th to 20th	Night	3 8% 4 10% 8% 4 6% 6% 7% 9% 32%	3510
	21st to end	Night	4 8% 4 7% 6% 4 5% 5% 6% 7% 44%	5214

Transparency (when cloud cover <= 30%)
Color Meanings: Too cloudy to forecast Poor Below Average Average Above average Transparent
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	45% 5% 14% 23% 8% 3	1329
	11th to 20th	Day	47% 5% 14% 24% 8% 3	1281
	21st to end	Day	48% 7% 15% 16% 12% 1	1584
February	1st to 10th	Day	52% 6% 15% 16% 8% 2	1458
	11th to 20th	Day	51% 7% 13% 20% 8% 1	1584
	21st to end	Day	51% 5% 12% 19% 12% 1	1422
March	1st to 10th	Day	51% 7% 15% 18% 9% 1	1800
	11th to 20th	Day	44% 6% 13% 24% 12% 2	1974
	21st to end	Day	52% 7% 15% 18% 7% 1	2182
April	1st to 10th	Day	51% 7% 13% 19% 8% 1	2223
	11th to 20th	Day	50% 5% 12% 22% 10% 2	2310
	21st to end	Day	50% 4 13% 22% 10% 1	2340
May	1st to 10th	Day	51% 5% 14% 21% 8%	2441
	11th to 20th	Day	43% 6% 14% 25% 10% 1	2658
	21st to end	Day	51% 6% 11% 24% 8% 1	2918
June	1st to 10th	Day	48% 8% 14% 22% 8% 1	2700
	11th to 20th	Day	51% 7% 13% 19% 7% 2	2700
	21st to end	Day	33% 7% 19% 28% 10% 2	2700
July	1st to 10th	Day	34% 8% 18% 27% 11% 2	2626
	11th to 20th	Day	33% 6% 19% 27% 14% 2	2619
	21st to end	Day	23% 6% 17% 34% 17% 3	2728
August	1st to 10th	Day	33% 5% 17% 32% 11% 2	2490
	11th to 20th	Day	29% 6% 20% 31% 11% 3	2299
	21st to end	Day	30% 5% 18% 29% 16% 2	2574
September	1st to 10th	Day	34% 4 14% 28% 15% 5%	2235
	11th to 20th	Day	39% 5% 13% 28% 13% 3	1980
	21st to end	Day	36% 5% 13% 30% 12% 3	1980
October	1st to 10th	Day	44% 5% 14% 26% 10% 2	1888
	11th to 20th	Day	41% 6% 14% 27% 10% 3	1692
	21st to end	Day	45% 5% 12% 25% 11% 2	1782
November	1st to 10th	Day	52% 6% 11% 20% 10% 2	1538
	11th to 20th	Day	43% 5% 16% 25% 10% 1	1482
	21st to end	Day	43% 6% 16% 23% 10% 2	1330
December	1st to 10th	Day	50% 5% 13% 17% 12% 3	1330
	11th to 20th	Day	50% 5% 14% 23% 7% 1	1684
	21st to end	Day	35% 5% 12% 24% 18% 6%	2442
January	1st to 10th	Night	51% 6% 12% 19% 9% 3	2836
	11th to 20th	Night	46% 7% 15% 22% 7% 3	2722
	21st to end	Night	46% 6% 14% 19% 14% 2	2772
February	1st to 10th	Night	49% 5% 13% 20% 11% 2	2501
	11th to 20th	Night	51% 6% 12% 20% 10% 1	2273
	21st to end	Night	50% 5% 11% 20% 12% 2	1830
March	1st to 10th	Night	49% 6% 13% 23% 7% 1	2160
	11th to 20th	Night	46% 6% 13% 21% 12% 1	1985
	21st to end	Night	51% 7% 15% 18% 8% 1	2171
April	1st to 10th	Night	50% 7% 12% 19% 12%	1736
	11th to 20th	Night	51% 5% 12% 21% 10% 1	1601
	21st to end	Night	48% 6% 14% 21% 9% 2	1620
May	1st to 10th	Night	47% 5% 14% 22% 11% 1	1514
	11th to 20th	Night	38% 6% 15% 27% 12% 1	1239
	21st to end	Night	48% 6% 16% 21% 7% 2	1358
June	1st to 10th	Night	49% 6% 15% 20% 10%	1260
	11th to 20th	Night	48% 7% 16% 19% 8% 2	1260
	21st to end	Night	32% 7% 22% 27% 11% 1	1260
July	1st to 10th	Night	32% 7% 20% 28% 12% 1	1225
	11th to 20th	Night	30% 8% 21% 25% 13% 3	1218
	21st to end	Night	23% 6% 17% 32% 19% 3	1346
August	1st to 10th	Night	34% 7% 16% 28% 13% 3	1424
	11th to 20th	Night	26% 6% 20% 31% 14% 2	1602
	21st to end	Night	29% 5% 15% 29% 18% 5%	1782
September	1st to 10th	Night	33% 6% 15% 26% 15% 5%	1722
	11th to 20th	Night	36% 5% 14% 27% 14% 5%	1980
	21st to end	Night	33% 5% 17% 26% 14% 4	1980
October	1st to 10th	Night	40% 5% 14% 25% 15% 2	2071
	11th to 20th	Night	38% 6% 16% 24% 13% 3	2268
	21st to end	Night	42% 6% 15% 25% 11% 1	2574
November	1st to 10th	Night	48% 5% 12% 22% 11% 2	2522
	11th to 20th	Night	42% 7% 16% 20% 14% 1	2693
	21st to end	Night	40% 5% 20% 21% 11% 3	2850
December	1st to 10th	Night	47% 6% 14% 20% 10% 3	2850
	11th to 20th	Night	46% 6% 19% 23% 6% 1	3507
	21st to end	Night	38% 4 12% 26% 15% 5%	5214

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
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	8% 4 32% 30% 14% 11%	180
	11th to 20th	Day	7% 7% 30% 33% 17% 7%	162
	21st to end	Day	9% 9% 26% 38% 15% 5%	176
February	1st to 10th	Day	12% 8% 30% 37% 10% 3	168
	11th to 20th	Day	10% 9% 34% 31% 14% 2	240
	21st to end	Day	8% 7% 28% 37% 17% 3	288
March	1st to 10th	Day	10% 10% 34% 28% 13% 5%	420
	11th to 20th	Day	8% 11% 31% 32% 14% 5%	420
	21st to end	Day	12% 13% 33% 21% 15% 6%	462
April	1st to 10th	Day	12% 12% 30% 31% 12% 3	420
	11th to 20th	Day	14% 10% 27% 29% 17% 4	412
	21st to end	Day	19% 10% 26% 27% 15% 4	420
May	1st to 10th	Day	18% 10% 23% 21% 22% 7%	475
	11th to 20th	Day	15% 5% 21% 30% 23% 5%	625
	21st to end	Day	19% 4 20% 27% 22% 8%	679
June	1st to 10th	Day	17% 7% 22% 32% 19% 4	630
	11th to 20th	Day	20% 6% 25% 30% 16% 3	630
	21st to end	Day	9% 4 23% 32% 23% 8%	630
July	1st to 10th	Day	10% 4 18% 33% 27% 8%	621
	11th to 20th	Day	12% 5% 19% 33% 24% 7%	618
	21st to end	Day	5% 5% 20% 33% 27% 10%	635
August	1st to 10th	Day	9% 5% 22% 33% 22% 9%	447
	11th to 20th	Day	8% 2 21% 32% 28% 9%	437
	21st to end	Day	10% 6% 20% 32% 20% 13%	495
September	1st to 10th	Day	13% 6% 26% 31% 19% 4	450
	11th to 20th	Day	18% 7% 20% 28% 20% 6%	450
	21st to end	Day	14% 12% 25% 30% 15% 5%	450
October	1st to 10th	Day	18% 8% 18% 28% 21% 7%	358
	11th to 20th	Day	10% 8% 33% 26% 17% 7%	270
	21st to end	Day	14% 12% 33% 25% 13% 2	297
November	1st to 10th	Day	19% 8% 31% 26% 13% 3	270
	11th to 20th	Day	14% 9% 38% 27% 11% 2	252
	21st to end	Day	7% 8% 35% 27% 13% 10%	180
December	1st to 10th	Day	7% 8% 36% 30% 14% 4	180
	11th to 20th	Day	9% 9% 38% 29% 12% 2	180
	21st to end	Day	9% 4 26% 32% 25% 5%	198
January	1st to 10th	Night	8% 8% 35% 35% 12% 2	950
	11th to 20th	Night	10% 6% 35% 33% 14% 2	908
	21st to end	Night	12% 9% 33% 32% 12% 2	792
February	1st to 10th	Night	9% 8% 29% 35% 16% 2	720
	11th to 20th	Night	12% 7% 32% 37% 12% 1	704
	21st to end	Night	6% 5% 28% 36% 21% 5%	592
March	1st to 10th	Night	9% 5% 32% 35% 16% 4	720
	11th to 20th	Night	9% 7% 35% 34% 14% 1	720
	21st to end	Night	13% 6% 29% 35% 14% 3	792
April	1st to 10th	Night	13% 6% 31% 35% 14% 2	656
	11th to 20th	Night	16% 6% 31% 34% 13%	533
	21st to end	Night	15% 8% 30% 34% 12% 1	540
May	1st to 10th	Night	17% 5% 26% 33% 17% 1	488
	11th to 20th	Night	13% 3 24% 36% 22% 1	354
	21st to end	Night	20% 4 20% 38% 16% 2	389
June	1st to 10th	Night	17% 5% 23% 38% 14% 2	360
	11th to 20th	Night	17% 3 29% 34% 15% 1	360
	21st to end	Night	10% 4 21% 41% 23% 2	360
July	1st to 10th	Night	9% 5% 14% 45% 27% 1	350
	11th to 20th	Night	9% 3 21% 44% 20% 2	348
	21st to end	Night	6% 1 22% 44% 26% 2	394
August	1st to 10th	Night	10% 3 15% 41% 28% 2	358
	11th to 20th	Night	9% 3 18% 45% 23% 2	534
	21st to end	Night	10% 5% 20% 40% 25% 1	594
September	1st to 10th	Night	13% 4 22% 39% 20% 2	610
	11th to 20th	Night	17% 4 18% 38% 22% 2	720
	21st to end	Night	12% 5% 30% 34% 17% 2	720
October	1st to 10th	Night	17% 4 22% 37% 18% 2	720
	11th to 20th	Night	12% 5% 33% 32% 15% 3	720
	21st to end	Night	12% 7% 34% 34% 12% 1	792
November	1st to 10th	Night	15% 7% 38% 30% 9% 2	857
	11th to 20th	Night	10% 10% 41% 29% 8% 2	950
	21st to end	Night	10% 6% 38% 34% 11% 3	950
December	1st to 10th	Night	10% 7% 31% 34% 15% 2	950
	11th to 20th	Night	8% 7% 37% 35% 11% 1	950
	21st to end	Night	13% 5% 33% 33% 14% 3	1045

Page generated at 2024-01-09 05:14:39. Version ac07

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