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 2025-10-04.

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	8% 8% 3 8% 5% 5% 5% 4 6% 8% 40%	130731
	Night	6% 9% 4 9% 5% 5% 5% 4 6% 8% 38%	127335
Transparency	Day	40% 6% 14% 26% 12% 2	130430
	Night	42% 6% 15% 23% 12% 2	127213
Seeing	Day	12% 7% 25% 30% 19% 6%	16617
	Night	11% 6% 30% 36% 15% 2	25612

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	3 10% 7% 15% 8% 7% 5% 4 6% 6% 30%	3179
	11th to 20th	Day	3 9% 4 11% 6% 5% 5% 6% 8% 6% 37%	3187
	21st to end	Day	3 7% 3 9% 6% 5% 5% 4 6% 7% 46%	4004
February	1st to 10th	Day	4 11% 5% 13% 7% 7% 7% 3 5% 8% 27%	1620
	11th to 20th	Day	6% 12% 5% 10% 6% 7% 6% 6% 8% 8% 27%	1755
	21st to end	Day	3 13% 6% 10% 6% 6% 5% 3 8% 8% 31%	1586
March	1st to 10th	Day	3 10% 5% 12% 6% 5% 4 4 5% 10% 37%	4518
	11th to 20th	Day	5% 9% 4 8% 5% 5% 5% 4 6% 8% 40%	4993
	21st to end	Day	8% 18% 6% 13% 5% 5% 5% 4 6% 7% 22%	5502
April	1st to 10th	Day	8% 13% 4 10% 6% 5% 4 5% 7% 7% 30%	2471
	11th to 20th	Day	10% 12% 3 9% 6% 5% 6% 4 7% 7% 31%	2570
	21st to end	Day	12% 12% 3 9% 6% 4 5% 5% 5% 7% 32%	2600
May	1st to 10th	Day	15% 10% 3 6% 4 4 4 4 5% 6% 39%	6143
	11th to 20th	Day	11% 9% 4 10% 6% 6% 6% 5% 7% 9% 27%	6734
	21st to end	Day	11% 7% 3 8% 5% 5% 6% 5% 6% 7% 38%	7405
June	1st to 10th	Day	14% 8% 2 6% 6% 6% 6% 5% 7% 8% 33%	3000
	11th to 20th	Day	18% 8% 3 6% 5% 5% 6% 6% 6% 7% 30%	3000
	21st to end	Day	8% 5% 2 5% 5% 4 5% 5% 8% 10% 43%	3000
July	1st to 10th	Day	7% 4 2 4 3 4 4 4 7% 9% 51%	6780
	11th to 20th	Day	10% 4 1 4 3 4 4 4 6% 10% 48%	6780
	21st to end	Day	8% 4 2 4 4 3 4 3 6% 8% 54%	7246
August	1st to 10th	Day	8% 6% 3 6% 4 4 5% 5% 7% 9% 42%	4541
	11th to 20th	Day	6% 5% 2 6% 4 4 5% 4 7% 10% 48%	4158
	21st to end	Day	9% 3 1 4 3 3 4 4 5% 8% 56%	4664
September	1st to 10th	Day	9% 6% 2 6% 4 4 4 3 5% 6% 52%	2483
	11th to 20th	Day	14% 8% 2 5% 3 4 3 3 5% 7% 46%	2200
	21st to end	Day	9% 7% 2 6% 4 4 4 3 6% 8% 48%	2200
October	1st to 10th	Day	7% 6% 3 7% 5% 5% 5% 5% 7% 8% 43%	3348
	11th to 20th	Day	6% 7% 2 7% 4 5% 5% 4 6% 9% 46%	2953
	21st to end	Day	6% 8% 3 7% 4 5% 6% 4 5% 7% 45%	3101
November	1st to 10th	Day	9% 16% 5% 8% 5% 5% 5% 4 5% 7% 31%	1620
	11th to 20th	Day	7% 10% 3 10% 6% 5% 5% 3 5% 8% 38%	1560
	21st to end	Day	4 11% 6% 8% 6% 5% 6% 4 8% 10% 32%	1400
December	1st to 10th	Day	4 13% 5% 12% 6% 5% 6% 4 5% 7% 34%	2290
	11th to 20th	Day	4 10% 5% 12% 7% 6% 5% 4 7% 6% 33%	2642
	21st to end	Day	3 10% 3 7% 5% 4 6% 4 6% 9% 42%	3498
January	1st to 10th	Night	3 15% 5% 14% 8% 7% 5% 4 5% 7% 25%	6766
	11th to 20th	Night	3 10% 5% 12% 6% 6% 6% 5% 6% 7% 34%	6739
	21st to end	Night	3 10% 5% 9% 5% 4 4 4 6% 7% 43%	6952
February	1st to 10th	Night	4 12% 4 12% 6% 7% 6% 5% 5% 8% 30%	2778
	11th to 20th	Night	5% 13% 4 11% 6% 5% 6% 5% 7% 8% 29%	2532
	21st to end	Night	3 11% 5% 12% 8% 6% 5% 3 7% 8% 33%	2040
March	1st to 10th	Night	3 8% 4 12% 7% 6% 5% 5% 7% 10% 33%	5376
	11th to 20th	Night	5% 9% 4 10% 5% 5% 5% 4 6% 8% 37%	5005
	21st to end	Night	9% 19% 6% 12% 6% 5% 5% 5% 6% 7% 20%	5457
April	1st to 10th	Night	8% 14% 4 11% 5% 5% 5% 4 6% 8% 30%	1928
	11th to 20th	Night	9% 13% 4 10% 6% 6% 4 4 6% 7% 32%	1781
	21st to end	Night	9% 12% 4 9% 6% 5% 5% 5% 6% 9% 32%	1800
May	1st to 10th	Night	15% 10% 3 8% 4 5% 4 4 5% 6% 35%	3826
	11th to 20th	Night	13% 9% 3 9% 5% 6% 5% 5% 7% 9% 29%	3159
	21st to end	Night	11% 7% 3 8% 5% 5% 5% 4 6% 7% 38%	3470
June	1st to 10th	Night	13% 8% 3 7% 6% 5% 6% 6% 5% 7% 33%	1400
	11th to 20th	Night	16% 7% 2 8% 5% 5% 6% 5% 6% 8% 31%	1400
	21st to end	Night	8% 4 2 6% 4 5% 5% 5% 7% 8% 46%	1400
July	1st to 10th	Night	7% 4 2 6% 5% 4 6% 4 6% 7% 48%	3180
	11th to 20th	Night	7% 5% 2 4 3 5% 4 4 8% 11% 47%	3180
	21st to end	Night	10% 4 2 5% 3 3 4 3 6% 8% 51%	3594
August	1st to 10th	Night	9% 6% 2 7% 4 5% 6% 5% 7% 9% 42%	2609
	11th to 20th	Night	6% 4 2 7% 5% 4 5% 5% 8% 11% 43%	2901
	21st to end	Night	8% 3 2 3 3 3 4 4 6% 9% 55%	3245
September	1st to 10th	Night	9% 5% 3 6% 4 3 4 4 6% 8% 49%	1914
	11th to 20th	Night	13% 6% 2 5% 3 3 4 3 5% 7% 49%	2200
	21st to end	Night	8% 6% 2 5% 4 4 4 4 6% 8% 48%	2200
October	1st to 10th	Night	7% 6% 2 5% 4 4 4 4 6% 8% 49%	3692
	11th to 20th	Night	6% 7% 2 6% 4 4 4 4 6% 8% 48%	3962
	21st to end	Night	5% 8% 2 7% 4 5% 5% 5% 7% 7% 44%	4457
November	1st to 10th	Night	8% 15% 3 8% 5% 4 5% 4 6% 8% 34%	2659
	11th to 20th	Night	4 11% 3 8% 6% 5% 5% 5% 8% 7% 37%	2835
	21st to end	Night	5% 11% 3 9% 5% 5% 5% 4 7% 9% 37%	3000
December	1st to 10th	Night	3 12% 4 10% 6% 7% 7% 5% 7% 8% 31%	4890
	11th to 20th	Night	4 11% 5% 13% 7% 6% 6% 5% 7% 8% 28%	5550
	21st to end	Night	4 9% 4 9% 5% 5% 5% 4 6% 7% 42%	7458

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	53% 5% 11% 21% 8% 2	3179
	11th to 20th	Day	45% 5% 11% 18% 17% 4	3208
	21st to end	Day	36% 5% 14% 32% 13% 1	4004
February	1st to 10th	Day	54% 6% 14% 15% 9% 2	1620
	11th to 20th	Day	50% 7% 13% 20% 8% 2	1764
	21st to end	Day	48% 6% 12% 20% 12% 1	1586
March	1st to 10th	Day	43% 5% 12% 23% 16% 1	4518
	11th to 20th	Day	40% 6% 14% 24% 17% 1	4994
	21st to end	Day	60% 6% 13% 15% 6% 1	5502
April	1st to 10th	Day	50% 6% 13% 20% 9% 1	2471
	11th to 20th	Day	49% 5% 12% 23% 10% 2	2570
	21st to end	Day	49% 5% 13% 22% 10% 1	2600
May	1st to 10th	Day	45% 4 10% 22% 15% 5%	6143
	11th to 20th	Day	48% 8% 14% 22% 7%	6738
	21st to end	Day	43% 6% 13% 27% 10% 1	7406
June	1st to 10th	Day	45% 8% 14% 23% 9% 2	3000
	11th to 20th	Day	50% 7% 13% 20% 8% 2	3000
	21st to end	Day	33% 7% 20% 28% 11% 2	3000
July	1st to 10th	Day	27% 7% 17% 28% 17% 3	6706
	11th to 20th	Day	30% 7% 21% 29% 12% 1	6699
	21st to end	Day	28% 6% 14% 27% 17% 7%	7041
August	1st to 10th	Day	34% 8% 15% 34% 8% 1	4524
	11th to 20th	Day	29% 7% 23% 31% 8% 2	4197
	21st to end	Day	26% 5% 17% 36% 15% 1	4663
September	1st to 10th	Day	32% 5% 14% 29% 15% 6%	2483
	11th to 20th	Day	38% 5% 13% 28% 13% 3	2200
	21st to end	Day	34% 5% 13% 31% 13% 3	2200
October	1st to 10th	Day	36% 6% 17% 32% 9% 1	3348
	11th to 20th	Day	33% 6% 18% 28% 13% 3	2953
	21st to end	Day	38% 5% 10% 33% 13% 1	3101
November	1st to 10th	Day	52% 6% 11% 20% 10% 1	1620
	11th to 20th	Day	44% 5% 16% 24% 10% 1	1560
	21st to end	Day	45% 6% 16% 22% 9% 2	1400
December	1st to 10th	Day	49% 5% 13% 23% 7% 2	2290
	11th to 20th	Day	48% 6% 18% 21% 6% 1	2644
	21st to end	Day	37% 5% 12% 24% 17% 4	3498
January	1st to 10th	Night	57% 5% 11% 21% 5% 2	6766
	11th to 20th	Night	47% 5% 12% 18% 14% 4	6780
	21st to end	Night	40% 4 14% 28% 14% 1	6952
February	1st to 10th	Night	51% 5% 12% 19% 12% 2	2778
	11th to 20th	Night	50% 6% 12% 20% 11% 1	2533
	21st to end	Night	48% 5% 12% 21% 12% 2	2040
March	1st to 10th	Night	43% 6% 17% 21% 11% 2	5376
	11th to 20th	Night	42% 6% 14% 24% 13% 1	5005
	21st to end	Night	60% 7% 13% 12% 8% 1	5457
April	1st to 10th	Night	50% 6% 12% 20% 12%	1928
	11th to 20th	Night	50% 6% 11% 22% 10% 1	1781
	21st to end	Night	48% 6% 14% 21% 9% 2	1800
May	1st to 10th	Night	49% 5% 9% 21% 15% 2	3823
	11th to 20th	Night	48% 7% 14% 24% 6% 1	3159
	21st to end	Night	42% 6% 17% 25% 9% 1	3470
June	1st to 10th	Night	48% 6% 14% 20% 11% 1	1400
	11th to 20th	Night	47% 7% 15% 20% 8% 2	1400
	21st to end	Night	33% 7% 22% 27% 11% 1	1400
July	1st to 10th	Night	30% 8% 17% 22% 20% 2	3145
	11th to 20th	Night	29% 8% 21% 31% 9% 2	3138
	21st to end	Night	30% 6% 16% 27% 16% 6%	3494
August	1st to 10th	Night	35% 8% 15% 27% 13% 2	2601
	11th to 20th	Night	32% 9% 22% 28% 10% 1	2928
	21st to end	Night	25% 5% 18% 35% 15% 3	3245
September	1st to 10th	Night	32% 6% 15% 27% 16% 6%	1914
	11th to 20th	Night	35% 5% 15% 27% 14% 4	2200
	21st to end	Night	32% 5% 17% 27% 14% 4	2200
October	1st to 10th	Night	30% 6% 15% 29% 18% 2	3692
	11th to 20th	Night	33% 5% 18% 25% 17% 2	3962
	21st to end	Night	36% 6% 12% 32% 14% 1	4457
November	1st to 10th	Night	48% 5% 12% 22% 11% 2	2659
	11th to 20th	Night	42% 7% 16% 20% 14% 1	2835
	21st to end	Night	42% 5% 20% 20% 10% 3	3000
December	1st to 10th	Night	48% 7% 16% 19% 7% 2	4890
	11th to 20th	Night	50% 6% 20% 18% 5%	5547
	21st to end	Night	40% 4 10% 26% 16% 4	7458

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% 5% 32% 32% 14% 11%	200
	11th to 20th	Day	6% 7% 33% 34% 15% 6%	200
	21st to end	Day	8% 9% 29% 35% 15% 4	220
February	1st to 10th	Day	10% 9% 27% 38% 12% 4	210
	11th to 20th	Day	8% 7% 33% 34% 15% 3	300
	21st to end	Day	7% 9% 31% 34% 16% 3	350
March	1st to 10th	Day	9% 10% 33% 29% 13% 5%	500
	11th to 20th	Day	7% 11% 32% 33% 13% 4	500
	21st to end	Day	13% 13% 32% 22% 15% 5%	550
April	1st to 10th	Day	12% 11% 31% 30% 12% 4	500
	11th to 20th	Day	14% 11% 28% 28% 15% 4	492
	21st to end	Day	18% 11% 25% 27% 15% 5%	500
May	1st to 10th	Day	17% 9% 23% 23% 21% 6%	561
	11th to 20th	Day	14% 6% 21% 32% 22% 6%	725
	21st to end	Day	17% 4 20% 28% 23% 7%	789
June	1st to 10th	Day	15% 8% 24% 31% 18% 4	730
	11th to 20th	Day	18% 7% 25% 29% 17% 3	730
	21st to end	Day	9% 4 23% 32% 24% 8%	730
July	1st to 10th	Day	10% 4 17% 33% 28% 8%	721
	11th to 20th	Day	12% 4 19% 33% 24% 8%	718
	21st to end	Day	7% 4 20% 32% 27% 9%	739
August	1st to 10th	Day	9% 5% 21% 33% 24% 9%	527
	11th to 20th	Day	7% 2 22% 32% 28% 8%	517
	21st to end	Day	11% 5% 19% 32% 22% 12%	583
September	1st to 10th	Day	11% 6% 24% 30% 22% 8%	530
	11th to 20th	Day	17% 6% 19% 28% 22% 7%	530
	21st to end	Day	12% 12% 27% 31% 14% 4	530
October	1st to 10th	Day	16% 8% 19% 30% 20% 6%	405
	11th to 20th	Day	9% 8% 32% 26% 17% 7%	300
	21st to end	Day	14% 12% 33% 26% 12% 3	330
November	1st to 10th	Day	18% 8% 30% 27% 14% 3	300
	11th to 20th	Day	13% 10% 39% 25% 11% 2	280
	21st to end	Day	10% 8% 32% 28% 13% 10%	200
December	1st to 10th	Day	7% 9% 36% 30% 15% 5%	200
	11th to 20th	Day	9% 10% 38% 30% 12% 2	200
	21st to end	Day	9% 4 25% 33% 25% 4	220
January	1st to 10th	Night	8% 9% 34% 35% 12% 2	1000
	11th to 20th	Night	9% 6% 37% 33% 13% 2	1000
	21st to end	Night	11% 10% 34% 32% 12% 1	880
February	1st to 10th	Night	9% 8% 29% 36% 15% 2	800
	11th to 20th	Night	11% 6% 31% 38% 13% 1	784
	21st to end	Night	6% 5% 30% 35% 19% 4	660
March	1st to 10th	Night	9% 5% 32% 35% 16% 3	800
	11th to 20th	Night	9% 7% 35% 35% 13% 1	800
	21st to end	Night	14% 7% 29% 34% 13% 3	880
April	1st to 10th	Night	13% 6% 31% 34% 13% 2	728
	11th to 20th	Night	15% 8% 31% 34% 12%	593
	21st to end	Night	15% 8% 30% 35% 12% 1	600
May	1st to 10th	Night	18% 5% 26% 34% 16% 1	542
	11th to 20th	Night	13% 4 24% 36% 21% 1	394
	21st to end	Night	18% 5% 20% 38% 18% 2	433
June	1st to 10th	Night	17% 8% 24% 38% 13% 2	400
	11th to 20th	Night	17% 4 30% 33% 15% 1	400
	21st to end	Night	11% 3 21% 42% 22% 2	400
July	1st to 10th	Night	9% 5% 15% 45% 26% 1	390
	11th to 20th	Night	10% 3 20% 44% 21% 2	388
	21st to end	Night	7% 2 21% 43% 26% 1	438
August	1st to 10th	Night	10% 4 15% 40% 29% 2	398
	11th to 20th	Night	9% 3 18% 45% 23% 2	594
	21st to end	Night	10% 5% 20% 41% 23% 1	660
September	1st to 10th	Night	12% 4 21% 40% 21% 2	678
	11th to 20th	Night	16% 4 17% 38% 24% 2	800
	21st to end	Night	11% 5% 31% 36% 16% 2	800
October	1st to 10th	Night	16% 4 24% 37% 17% 2	772
	11th to 20th	Night	11% 6% 33% 33% 15% 3	760
	21st to end	Night	11% 7% 34% 34% 13% 1	836
November	1st to 10th	Night	14% 7% 38% 31% 9% 1	904
	11th to 20th	Night	10% 10% 40% 29% 9% 2	1000
	21st to end	Night	10% 6% 37% 34% 10% 3	1000
December	1st to 10th	Night	10% 7% 32% 34% 15% 2	1000
	11th to 20th	Night	9% 7% 37% 35% 11% 1	1000
	21st to end	Night	12% 5% 33% 33% 14% 3	1100

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