Miquelon Lake Provincial Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Miquelon Lake Provincial Park clear sky chart from 2005-11-06 to 2024-11-05.

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% 9% 3 9% 5% 5% 5% 4 6% 8% 36%	105707
	Night	8% 9% 4 10% 6% 6% 5% 4 6% 8% 34%	101912
Transparency	Day	43% 9% 17% 22% 8%	105449
	Night	45% 9% 16% 21% 9% 1	101816
Seeing	Day	12% 7% 25% 31% 19% 6%	15488
	Night	12% 6% 29% 36% 16% 2	24461

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	4 12% 5% 12% 9% 6% 5% 3 7% 10% 28%	2219
	11th to 20th	Day	4 10% 3 9% 7% 6% 7% 5% 10% 9% 30%	2199
	21st to end	Day	6% 12% 4 10% 6% 5% 5% 3 5% 8% 36%	2602
February	1st to 10th	Day	8% 13% 5% 12% 8% 6% 5% 4 6% 8% 26%	1520
	11th to 20th	Day	5% 11% 6% 11% 8% 6% 6% 6% 6% 7% 27%	1641
	21st to end	Day	3 13% 5% 12% 8% 5% 7% 6% 7% 8% 27%	1443
March	1st to 10th	Day	3 12% 5% 13% 8% 6% 6% 5% 6% 9% 27%	3138
	11th to 20th	Day	5% 13% 3 8% 5% 4 4 3 5% 11% 39%	3489
	21st to end	Day	7% 14% 6% 18% 6% 5% 4 4 5% 6% 25%	3838
April	1st to 10th	Day	9% 12% 4 8% 6% 7% 5% 5% 6% 8% 30%	2393
	11th to 20th	Day	13% 12% 4 9% 4 5% 5% 4 6% 8% 31%	2440
	21st to end	Day	13% 9% 4 8% 5% 5% 5% 4 7% 8% 32%	2470
May	1st to 10th	Day	15% 11% 4 9% 5% 6% 5% 4 5% 6% 30%	4599
	11th to 20th	Day	11% 11% 3 9% 6% 6% 5% 4 7% 8% 30%	4694
	21st to end	Day	12% 8% 3 9% 6% 6% 6% 4 7% 9% 29%	5161
June	1st to 10th	Day	14% 8% 4 8% 6% 5% 6% 4 6% 7% 31%	2850
	11th to 20th	Day	18% 10% 4 8% 6% 5% 6% 4 6% 8% 24%	2850
	21st to end	Day	11% 6% 2 6% 6% 5% 6% 5% 8% 9% 36%	2850
July	1st to 10th	Day	8% 5% 2 6% 4 4 5% 4 6% 7% 48%	4740
	11th to 20th	Day	8% 5% 2 6% 4 5% 5% 4 6% 9% 46%	4740
	21st to end	Day	10% 6% 2 6% 4 4 4 4 6% 8% 45%	5138
August	1st to 10th	Day	11% 6% 2 6% 5% 5% 5% 4 7% 8% 41%	4543
	11th to 20th	Day	7% 5% 2 6% 4 4 5% 4 7% 10% 43%	4099
	21st to end	Day	10% 5% 2 5% 4 4 5% 5% 7% 9% 44%	4521
September	1st to 10th	Day	10% 5% 2 8% 4 4 5% 4 6% 8% 44%	2418
	11th to 20th	Day	14% 7% 3 7% 4 3 4 3 6% 8% 41%	2090
	21st to end	Day	8% 6% 2 7% 4 4 5% 4 6% 8% 44%	2090
October	1st to 10th	Day	8% 8% 4 8% 5% 6% 5% 3 6% 8% 40%	3266
	11th to 20th	Day	9% 9% 3 8% 4 4 5% 4 6% 9% 37%	2937
	21st to end	Day	7% 11% 4 8% 5% 6% 5% 4 6% 8% 39%	3023
November	1st to 10th	Day	8% 15% 6% 11% 7% 6% 6% 4 6% 9% 25%	1520
	11th to 20th	Day	5% 11% 5% 15% 7% 6% 5% 3 5% 7% 30%	1402
	21st to end	Day	5% 10% 6% 11% 7% 6% 4 4 5% 8% 32%	1330
December	1st to 10th	Day	5% 12% 4 10% 10% 6% 8% 5% 7% 8% 24%	1330
	11th to 20th	Day	5% 9% 4 13% 8% 5% 7% 4 9% 9% 25%	1682
	21st to end	Day	4 9% 3 7% 6% 6% 5% 3 7% 7% 44%	2442
January	1st to 10th	Night	4 9% 5% 14% 9% 7% 7% 6% 7% 7% 25%	4726
	11th to 20th	Night	3 8% 3 11% 9% 8% 6% 6% 6% 7% 33%	4699
	21st to end	Night	6% 12% 4 11% 6% 5% 4 4 6% 7% 33%	5086
February	1st to 10th	Night	5% 10% 5% 13% 9% 8% 7% 5% 6% 6% 27%	2660
	11th to 20th	Night	5% 12% 4 10% 6% 6% 6% 5% 7% 7% 31%	2426
	21st to end	Night	4 10% 4 10% 8% 7% 6% 5% 8% 8% 31%	2008
March	1st to 10th	Night	4 10% 5% 13% 7% 6% 6% 5% 8% 9% 27%	3736
	11th to 20th	Night	4 9% 3 9% 8% 5% 5% 3 6% 9% 38%	3490
	21st to end	Night	6% 12% 6% 16% 8% 6% 6% 4 7% 8% 21%	3812
April	1st to 10th	Night	7% 10% 2 9% 7% 7% 5% 5% 7% 7% 34%	1787
	11th to 20th	Night	11% 11% 5% 10% 5% 6% 7% 5% 7% 7% 27%	1691
	21st to end	Night	13% 10% 3 8% 5% 5% 5% 5% 5% 9% 34%	1710
May	1st to 10th	Night	22% 10% 4 9% 5% 5% 4 3 5% 5% 29%	2362
	11th to 20th	Night	11% 10% 4 9% 6% 6% 7% 5% 7% 8% 28%	2199
	21st to end	Night	14% 9% 4 9% 7% 6% 5% 4 7% 8% 27%	2414
June	1st to 10th	Night	14% 10% 3 8% 6% 5% 5% 4 6% 7% 31%	1330
	11th to 20th	Night	15% 9% 4 10% 6% 7% 7% 4 8% 7% 23%	1330
	21st to end	Night	8% 6% 2 8% 6% 5% 6% 6% 8% 9% 37%	1330
July	1st to 10th	Night	8% 6% 2 7% 5% 5% 6% 4 7% 8% 42%	2220
	11th to 20th	Night	7% 5% 2 6% 5% 5% 6% 5% 8% 11% 41%	2220
	21st to end	Night	11% 7% 2 5% 4 4 3 4 6% 11% 44%	2414
August	1st to 10th	Night	16% 6% 2 5% 4 4 5% 4 6% 7% 41%	2385
	11th to 20th	Night	9% 7% 2 7% 5% 4 5% 4 7% 9% 40%	2737
	21st to end	Night	9% 5% 2 6% 5% 5% 5% 4 7% 8% 43%	3146
September	1st to 10th	Night	11% 4 2 7% 4 3 5% 4 6% 7% 46%	1760
	11th to 20th	Night	12% 8% 2 6% 4 3 4 3 5% 7% 46%	2090
	21st to end	Night	8% 6% 3 7% 5% 4 5% 4 6% 8% 45%	2090
October	1st to 10th	Night	8% 7% 2 8% 5% 5% 4 4 6% 9% 41%	3706
	11th to 20th	Night	9% 7% 3 7% 4 4 5% 4 6% 9% 41%	3988
	21st to end	Night	5% 9% 3 8% 6% 6% 5% 5% 7% 9% 37%	4503
November	1st to 10th	Night	11% 16% 5% 10% 6% 4 5% 3 5% 6% 28%	2659
	11th to 20th	Night	6% 13% 5% 11% 8% 7% 6% 4 6% 6% 28%	2774
	21st to end	Night	5% 11% 5% 12% 8% 6% 5% 4 6% 9% 29%	2850
December	1st to 10th	Night	7% 13% 4 10% 9% 6% 6% 4 6% 7% 28%	2850
	11th to 20th	Night	5% 11% 5% 13% 7% 5% 6% 5% 7% 9% 25%	3510
	21st to end	Night	3 7% 3 8% 6% 6% 6% 4 6% 9% 43%	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	53% 9% 12% 20% 5% 1	2219
	11th to 20th	Day	45% 7% 13% 15% 18% 1	2220
	21st to end	Day	46% 8% 18% 23% 5%	2602
February	1st to 10th	Day	55% 6% 14% 16% 8% 1	1520
	11th to 20th	Day	53% 8% 15% 15% 8%	1650
	21st to end	Day	51% 8% 13% 20% 8%	1443
March	1st to 10th	Day	52% 8% 15% 18% 8%	3138
	11th to 20th	Day	40% 8% 20% 21% 12%	3490
	21st to end	Day	56% 9% 12% 19% 4	3838
April	1st to 10th	Day	48% 9% 18% 17% 8% 1	2393
	11th to 20th	Day	49% 7% 15% 20% 9%	2440
	21st to end	Day	47% 9% 15% 21% 7% 2	2470
May	1st to 10th	Day	51% 9% 12% 23% 6%	4599
	11th to 20th	Day	46% 10% 13% 22% 8%	4698
	21st to end	Day	46% 11% 18% 16% 9%	5162
June	1st to 10th	Day	49% 8% 13% 20% 9% 1	2850
	11th to 20th	Day	56% 9% 16% 14% 5%	2850
	21st to end	Day	39% 11% 22% 20% 6% 1	2850
July	1st to 10th	Day	32% 9% 17% 27% 14% 1	4666
	11th to 20th	Day	32% 9% 17% 29% 12%	4659
	21st to end	Day	35% 8% 21% 25% 11%	4976
August	1st to 10th	Day	38% 10% 18% 32% 2	4525
	11th to 20th	Day	32% 10% 24% 28% 6%	4139
	21st to end	Day	34% 9% 27% 26% 4 1	4520
September	1st to 10th	Day	36% 10% 19% 25% 8% 2	2418
	11th to 20th	Day	39% 7% 19% 28% 7%	2090
	21st to end	Day	36% 10% 18% 26% 8% 2	2090
October	1st to 10th	Day	42% 6% 22% 24% 5%	3266
	11th to 20th	Day	42% 7% 16% 25% 10%	2937
	21st to end	Day	43% 7% 18% 28% 4	3023
November	1st to 10th	Day	54% 8% 16% 14% 7% 1	1520
	11th to 20th	Day	54% 6% 15% 19% 5%	1402
	21st to end	Day	50% 8% 18% 19% 6% 1	1330
December	1st to 10th	Day	54% 9% 13% 15% 7% 1	1330
	11th to 20th	Day	50% 10% 17% 18% 6%	1684
	21st to end	Day	38% 7% 11% 28% 15% 2	2442
January	1st to 10th	Night	53% 10% 14% 15% 6% 1	4726
	11th to 20th	Night	46% 8% 14% 17% 14% 1	4740
	21st to end	Night	48% 7% 17% 21% 7%	5086
February	1st to 10th	Night	55% 6% 13% 18% 8% 1	2660
	11th to 20th	Night	48% 9% 14% 17% 11% 1	2427
	21st to end	Night	47% 8% 12% 22% 10% 1	2008
March	1st to 10th	Night	49% 8% 15% 20% 8%	3736
	11th to 20th	Night	40% 8% 21% 19% 10% 1	3490
	21st to end	Night	53% 13% 14% 15% 5%	3812
April	1st to 10th	Night	44% 9% 14% 20% 12% 1	1787
	11th to 20th	Night	52% 8% 12% 17% 8% 2	1691
	21st to end	Night	45% 8% 13% 21% 11% 1	1710
May	1st to 10th	Night	55% 7% 8% 22% 8% 1	2362
	11th to 20th	Night	46% 13% 13% 19% 9% 1	2199
	21st to end	Night	49% 12% 14% 15% 8% 1	2414
June	1st to 10th	Night	50% 8% 14% 19% 8% 1	1330
	11th to 20th	Night	54% 12% 15% 13% 5%	1330
	21st to end	Night	39% 11% 23% 22% 5% 1	1330
July	1st to 10th	Night	36% 9% 17% 21% 16% 1	2185
	11th to 20th	Night	34% 11% 17% 27% 10% 1	2178
	21st to end	Night	33% 8% 22% 27% 10%	2337
August	1st to 10th	Night	39% 10% 19% 30% 2	2378
	11th to 20th	Night	36% 10% 21% 24% 8%	2763
	21st to end	Night	35% 8% 22% 29% 5%	3146
September	1st to 10th	Night	33% 10% 19% 24% 12% 2	1760
	11th to 20th	Night	37% 7% 17% 28% 9% 2	2090
	21st to end	Night	35% 9% 15% 25% 13% 3	2090
October	1st to 10th	Night	37% 7% 21% 27% 7%	3706
	11th to 20th	Night	38% 7% 14% 33% 7%	3988
	21st to end	Night	41% 8% 21% 24% 6%	4503
November	1st to 10th	Night	55% 7% 12% 19% 7%	2659
	11th to 20th	Night	53% 9% 13% 17% 6% 1	2774
	21st to end	Night	51% 8% 16% 18% 6% 1	2850
December	1st to 10th	Night	53% 8% 14% 16% 8% 1	2850
	11th to 20th	Night	52% 9% 18% 14% 6%	3507
	21st to end	Night	36% 8% 16% 19% 17% 3	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	11% 4 29% 31% 19% 5%	180
	11th to 20th	Day	11% 5% 32% 32% 17% 3	180
	21st to end	Day	9% 10% 25% 36% 14% 6%	198
February	1st to 10th	Day	13% 9% 29% 34% 13% 2	180
	11th to 20th	Day	10% 6% 29% 34% 17% 3	258
	21st to end	Day	5% 5% 31% 34% 18% 8%	255
March	1st to 10th	Day	9% 8% 27% 34% 18% 3	460
	11th to 20th	Day	10% 6% 28% 32% 18% 6%	460
	21st to end	Day	14% 5% 23% 36% 18% 4	506
April	1st to 10th	Day	8% 12% 27% 36% 13% 4	460
	11th to 20th	Day	16% 7% 21% 29% 21% 7%	452
	21st to end	Day	18% 9% 22% 32% 14% 5%	460
May	1st to 10th	Day	13% 9% 23% 34% 16% 6%	628
	11th to 20th	Day	10% 6% 24% 35% 19% 7%	675
	21st to end	Day	16% 5% 22% 30% 19% 9%	734
June	1st to 10th	Day	17% 9% 23% 32% 15% 4	680
	11th to 20th	Day	18% 7% 25% 25% 18% 8%	680
	21st to end	Day	11% 5% 21% 29% 23% 10%	680
July	1st to 10th	Day	10% 4 16% 34% 25% 10%	671
	11th to 20th	Day	11% 4 19% 30% 26% 9%	668
	21st to end	Day	10% 5% 18% 32% 25% 10%	739
August	1st to 10th	Day	11% 4 21% 29% 23% 11%	577
	11th to 20th	Day	8% 5% 23% 32% 25% 7%	477
	21st to end	Day	11% 6% 21% 31% 22% 9%	539
September	1st to 10th	Day	11% 9% 28% 25% 19% 7%	490
	11th to 20th	Day	17% 6% 27% 30% 17% 3	490
	21st to end	Day	12% 13% 31% 26% 15% 3	490
October	1st to 10th	Day	18% 6% 31% 25% 15% 5%	357
	11th to 20th	Day	14% 9% 30% 31% 14% 2	300
	21st to end	Day	12% 13% 34% 27% 11% 3	330
November	1st to 10th	Day	13% 9% 30% 32% 14% 2	282
	11th to 20th	Day	10% 9% 36% 34% 10% 1	214
	21st to end	Day	5% 7% 37% 36% 11% 5%	180
December	1st to 10th	Day	8% 7% 32% 31% 16% 6%	180
	11th to 20th	Day	7% 12% 28% 35% 17% 1	180
	21st to end	Day	8% 5% 23% 39% 22% 4	198
January	1st to 10th	Night	9% 7% 33% 35% 13% 2	950
	11th to 20th	Night	9% 9% 33% 37% 11% 1	950
	21st to end	Night	12% 11% 33% 32% 11% 2	969
February	1st to 10th	Night	9% 8% 26% 37% 18% 2	760
	11th to 20th	Night	10% 6% 32% 36% 16% 1	744
	21st to end	Night	7% 4 27% 36% 21% 5%	628
March	1st to 10th	Night	9% 6% 27% 40% 16% 3	760
	11th to 20th	Night	10% 4 31% 37% 14% 3	760
	21st to end	Night	13% 4 28% 37% 16% 3	836
April	1st to 10th	Night	9% 7% 28% 33% 20% 2	647
	11th to 20th	Night	13% 6% 29% 34% 16% 1	563
	21st to end	Night	15% 8% 23% 36% 16% 2	570
May	1st to 10th	Night	17% 7% 22% 35% 17% 2	446
	11th to 20th	Night	12% 4 24% 39% 19% 1	374
	21st to end	Night	18% 5% 25% 30% 19% 2	411
June	1st to 10th	Night	17% 9% 23% 35% 14% 3	380
	11th to 20th	Night	20% 6% 22% 32% 18% 2	380
	21st to end	Night	10% 5% 22% 33% 26% 4	380
July	1st to 10th	Night	14% 3 16% 41% 25% 2	370
	11th to 20th	Night	10% 4 20% 44% 21% 1	368
	21st to end	Night	9% 5% 17% 41% 24% 3	416
August	1st to 10th	Night	11% 3 21% 31% 30% 4	378
	11th to 20th	Night	12% 4 17% 37% 27% 2	514
	21st to end	Night	12% 3 22% 38% 25% 1	627
September	1st to 10th	Night	13% 3 20% 40% 22% 2	587
	11th to 20th	Night	16% 4 21% 40% 18% 2	760
	21st to end	Night	11% 4 30% 39% 14% 2	760
October	1st to 10th	Night	15% 3 28% 39% 14% 1	760
	11th to 20th	Night	13% 5% 32% 35% 13% 1	760
	21st to end	Night	12% 7% 36% 33% 12%	858
November	1st to 10th	Night	18% 7% 33% 32% 9% 1	950
	11th to 20th	Night	12% 9% 35% 31% 11% 3	950
	21st to end	Night	9% 6% 40% 33% 10% 2	950
December	1st to 10th	Night	12% 8% 33% 31% 13% 3	950
	11th to 20th	Night	9% 7% 34% 36% 12% 2	950
	21st to end	Night	9% 4 31% 37% 15% 3	1045

Page generated at 2024-11-03 00:11:10. Version ac07

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